Liebert PEX User Manual

Liebert.PEX Series Air Conditioner User Manual

Liebert.PEX Series Air Conditioner

User Manual

Version V2.4

Revision date November 18, 2008

BOM 31011614

Emerson Network Power provides customers with technical support. Users may contact the nearest

Emerson local sales office or service center.

Copyright © 2008 by Emerson Network Power Co., Ltd.

All rights reserved. The contents in this document are subject to change without notice.

Emerson Network Power Co., Ltd.

Address: No.1 Kefa Rd., Science & Industry Park, Nanshan District 518057, Shenzhen China

Homepage: www.emersonnetworkpower.com.cn

E-mail: [email protected]


Contents

Chapter 1 Overview ............................................................................................................................................................ 1

1.1 Model Description ................................................................................................................................................. 1

1.2 Product Introduction.............................................................................................................................................. 1

1.3 Main Components................................................................................................................................................. 1

1.3.1 Indoor Unit ................................................................................................................................................. 1

1.3.2 Outdoor Unit .............................................................................................................................................. 2

1.3.3 Controller ................................................................................................................................................... 2

1.4 Environment Requirements .................................................................................................................................. 3

1.4.1 Operation Environment.............................................................................................................................. 3

1.4.2 Storage Environment................................................................................................................................. 3

Chapter 2 Mechanical Installation ....................................................................................................................................... 4

2.1 Transportation, Unpacking And Inspection ........................................................................................................... 4

2.1.1 Transportation And Movement .................................................................................................................. 4

2.1.2 Unpacking.................................................................................................................................................. 4

2.1.3 Inspection .................................................................................................................................................. 5

2.2 Installation Notes .................................................................................................................................................. 5

2.3 System Installation Arrangement .......................................................................................................................... 6

2.3.1 General Arrangement ................................................................................................................................ 6

2.3.2 System Installation Sketch Map................................................................................................................. 8

2.3.3 Mechanical Paremeters............................................................................................................................. 9

2.4 Installing Indoor Unit ........................................................................................................................................... 11

2.4.1 Preparing Equipment room...................................................................................................................... 11

2.4.2 Installation Space .................................................................................................................................... 12

2.4.3 Requirement Of Maintenance Space....................................................................................................... 12

2.4.4 Installation Procedures ............................................................................................................................ 13

2.5 Installing Outdoor Unit ........................................................................................................................................ 15

2.6 Piping.................................................................................................................................................................. 15

2.6.1 Piping For Air-Cooled Unit ....................................................................................................................... 15

2.6.2 Connecting Pipes For Water-cooled Units............................................................................................... 18

2.7 Base/Side Panel Cutout Locations...................................................................................................................... 19

2.8 Removing Transport Fastener And Vibration Absorber ...................................................................................... 21

2.9 Component Adjustment ...................................................................................................................................... 23

2.10 Installation Inspection ....................................................................................................................................... 24

Chapter 3 Electrical Installation......................................................................................................................................... 25

3.1 Work Introduction And Notes .............................................................................................................................. 25

3.2 Wiring Of Indoor Unit .......................................................................................................................................... 25

3.2.1 Locating Electrical Interface Of Indoor Unit ............................................................................................. 25

3.2.2 Connecting Power Cable Of Indoor Unit.................................................................................................. 26

3.2.3 Connecting Control Cables...................................................................................................................... 27

3.2.4 Connecting Extension Component Solenoid Valve (For Site Installation)................................................ 28

3.2.5 Connecting Control Signal Cables Of Outdoor Unit................................................................................. 28

3.2.6 Connecting Power Cables For Outdoor Unit............................................................................................ 28

3.3 Installation Inspection ......................................................................................................................................... 28

Chapter 4 System Start-Up And Commissioning .............................................................................................................. 30

4.1 Location Of MCBs............................................................................................................................................... 30

4.2 Power-on Commissioning Of Air-Cooled Series ................................................................................................. 31

4.2.1 Preparation Before Commissioning ......................................................................................................... 31

4.2.2 Commissioning Procedures..................................................................................................................... 31

4.2.3 Commissioning Complete Inspection....................................................................................................... 32

4.3 Start-up Commissioning Of Water-cooled Series................................................................................................ 33

4.3.1 Preparation Before Commissioning ......................................................................................................... 33

4.3.2 Commissioning Procedures..................................................................................................................... 33

4.3.3 Commissioning Complete Inspection....................................................................................................... 34

Chapter 5 iCOM Controller................................................................................................................................................ 35

5.1 LCD..................................................................................................................................................................... 35

5.2 Button And Indicator Panel ................................................................................................................................. 35

5.3 The Structure Chart Of Control Menu ................................................................................................................. 36

5.4 Startup Interface ................................................................................................................................................. 37

5.5 Main Interface ..................................................................................................................................................... 37

5.6 USER MENUS.................................................................................................................................................... 37

5.6.1 PASSWORD............................................................................................................................................ 38

5.6.2 SETPOINTS ............................................................................................................................................ 38

5.6.3 EVENT LOG............................................................................................................................................ 38

5.6.4 GRAPHICS.............................................................................................................................................. 39

5.6.5 SET ALARMS.......................................................................................................................................... 39

5.6.6 SENSOR DATA....................................................................................................................................... 40

5.6.7 DISPLAY SETUP .................................................................................................................................... 40

5.6.8 TOTAL RUN HRS.................................................................................................................................... 41

5.6.9 SLEEP MODE ......................................................................................................................................... 41

5.6.10 SERVICE INFO ..................................................................................................................................... 42

5.6.11 ACTIVE ALARMS.................................................................................................................................. 42

5.7 SERVICE MENUS .............................................................................................................................................. 42

5.7.1 PASSWORD LEVEL ............................................................................................................................... 42

5.7.2 SETPOINTS ............................................................................................................................................ 42

5.7.3 STANDBY................................................................................................................................................ 43

5.7.4 WELLNESS............................................................................................................................................. 44

5.7.5 DIAGNOSTICS........................................................................................................................................ 46

5.7.6 SET ALARMS.......................................................................................................................................... 47

5.7.7 CALIBRATION......................................................................................................................................... 49

5.7.8 NETWORK SETUP ................................................................................................................................. 50

5.7.9 OPTIONS SETUP ................................................................................................................................... 51

5.7.10 SERVICE INFO ..................................................................................................................................... 51

5.8 ADVANCED MENUS .......................................................................................................................................... 51

5.8.1 PASSWORD LEVEL ............................................................................................................................... 51

5.8.2 FACTORY SETUP .................................................................................................................................. 51


Chapter 6 Application Of INTELLISLOT............................................................................................................................ 55

6.1 Introduction Of Host Communication .................................................................................................................. 55

6.2 Installing Host Communication Card................................................................................................................... 56

6.3 Commisstioning Host Communication Component............................................................................................. 56

6.3.1 Setting HyperTerminal ............................................................................................................................. 57

6.3.2 Setting 485 Communication Card............................................................................................................ 58

6.3.3 Setting TCP/IP Communication Card ...................................................................................................... 59

6.3.4 Settiing SNMP Parameters Of TCP/IP Communication Card .................................................................. 61

6.4 Host Communication Networking Diagram ......................................................................................................... 64

Chapter 7 System O&M .................................................................................................................................................... 65

7.1 System Self-diagnosing Test .............................................................................................................................. 65

7.1.1 Self-diagnosing Functions ....................................................................................................................... 65

7.1.2 Electric Control Part................................................................................................................................. 65

7.2 Dust Filter ........................................................................................................................................................... 66

7.3 Fan Kit ................................................................................................................................................................ 67

7.3.1 Fan Bearing And Blades.......................................................................................................................... 67

7.3.2 Belt .......................................................................................................................................................... 67

7.3.3 Motor ....................................................................................................................................................... 67

7.4 Infrared Humidifier .............................................................................................................................................. 67

7.5 Electric Reheat.................................................................................................................................................... 69

7.6 Cooling System................................................................................................................................................... 69

7.6.1 Suction Pressure ..................................................................................................................................... 70

7.6.2 Exhaust Pressure .................................................................................................................................... 70

7.6.3 Suction Superheat Degree ...................................................................................................................... 70

7.6.4 Expansion Valve...................................................................................................................................... 70

7.6.5 Hot Gas Bypass Valve (For Single Compressor System)........................................................................ 71

7.6.6 Liquid Line Bypass Solenoid Valve (For Water-cooled Series Only, Compressor-on Bypass) ................ 72

7.6.7 Air-Cooled Condenser ............................................................................................................................. 72

7.6.8 Water-cooled Condenser......................................................................................................................... 72

7.6.9 Replacing The Compressor ..................................................................................................................... 73

Chapter 8 Troubleshooting................................................................................................................................................ 75

Appendix 1 Composition Of Electrical Control Box ........................................................................................................... 79

Appendix 2 Circuit Diagram............................................................................................................................................... 81

Appendix 3 Menu Structure Of Microprocessor................................................................................................................. 82

Chapter 1 Overview 1


Chapter 1 Overview

This chapter introduces the features, main parts, requirements on transportation and storage environment of the

Liebert.PEX series air conditioner.

1.1 Model Description

The model description of Liebert.PEX series air conditioner is shown in Figure 1-1.

P1 020 U W P M S 1 RHumidity type: 0-none; R-infrared; S-steam generating

iCOM display: S-standard display; L-large display

Power supply: M-three phase/50Hz/400V

System configuration: R-R22, scroll, 2 compressors; P-R22, scroll, 1 compressor

S-R407C, scroll, 2 compressors; Z-R407C, scroll, 1 compressor

Cooling type: A-air cooled; W-water cooled; G-glycol cooled

Unit frame: 1-one bay; 2-two bay; 3-three bay

Liebert.PEX series

Cooling capacity class: kW

Air path: U-upflow; F-downflow; D-duct

Reheat type: 0-none; 1-one stage -standard; 2-two stage

Figure 1-1 Model description

1.2 Product Introduction

Liebert.PEX series air conditioner is a medium-large sized precision environment control system, suitable to the

environment control of the equipment room or computer room. It aims to provide a sound operation environment for

precision equipment, such as sensitive equipment, industry processing equipment, communication equipment and

computers.

Liebert.PEX series air conditioner features high reliability, high sensible heat ratio and large airflow. It is configured

with an infrared humidifier adjustable to different water qualities, and is compatible with R407C refrigerant to meet the

requirement. Liebert.PEX series air conditioner is classified into air-cooled series and water-cooled series by cooling

mode.

Air-cooled series

Liebert.PEX air-cooled series air conditioner comprises indoor unit and outdoor unit. With the standard Liebert.PEX

condenser unit, the Liebert.PEX air-cooled series air conditioner can reduce noise pollution to the minimum while

meeting system cooling requirement. The Liebert.PEX low temperature CS (D) F_S series configurable to the

Liebert.PEX air-cooled series air conditioner qualifies the system to operate at the temperature of -84.2°F. Please

consult Emerson Network Power Co., Ltd. if the lower temperature is required.

Water-cooled series

Liebert.PEX water-cooled series air conditioner uses integrated structure and highly effective Plate Heat Exchanger

(PHE), thus it is compact, efficient and quiet.

1.3 Main Components

1.3.1 Indoor Unit

The indoor unit of the Liebert.PEX air conditioner includes compressor, evaporator, electric reheat, fan, controller,

infrared humidifier, thermal expansion valve, sight glass and drier-filter. Besides these components, the water-cooled

series indoor unit also includes PHE and water flow regulator.

2 Chapter 1 Overview


Compressor

The Copeland scroll compressor features low vibration, low noise and high reliability. The connection mode of

Rotalock makes the maintenance easier.

Evaporator

Finned tube evaporator with high heat dissipation efficiency is used. The distributor, with its model-specific design,

ensures that the refrigerant is distributed evenly in each loop, improving the evaporator efficiency to a great extent.

Thermal expansion valve

The external equalizer type thermal expansion valve collects temperature and pressure signals at the same time, so

that it can regulate the refrigerant flow more accurately.

Infrared humidifier

The infrared humidifier is designed with a simple structure, which is easy for teardown, cleaning and maintenance. It is

adjustable to a wide range of water qualities, with fast startup and high humidifying efficiency.

Fan

The system uses centrifugal fan with high efficiency and reliability, large airflow and long blowing distance. With the

belt transmission mechanism, it is easy for maintenance.

Electric reheat

The system uses screw finned U type stainless steel electric heating tube, with fast heating speed and evenly

distributed heat volume.

Sight glass

The sight glass is the window for observing the system refrigerant recycle, mainly the moisture content of system.

When the moisture content is too high, the color will change from green to yellow.

Filter drier

The filter drier can effectively eliminate the moisture in system within a period of time, filtrate the impurities generated

during long-term system operation and ensure normal system operation.

PHE (for water-cooled series)

The system uses soldered auto-cleansing PHE, which features compact construct and high heat exchanging

efficiency.

Water flow regulator (for water-cooled series)

The water flow regulator controls the water flow in the PHE by regulating the valve position according to the collected

high-pressure signal in the cooling system, thus ensuring the stable system operation.

1.3.2 Outdoor Unit

The outdoor unit is applicable to Liebert.PEX air-cooled series. For details, see Liebert.PEX Condenser User Manual.

1.3.3 Controller

The micro-processing controller of Liebert.PEX series air conditioner uses the LCD screen with blue backlight and 128

× 64 pixels. The user interface operation is simple. The multi-level password protection can effectively prevent illegal

operation. The controller also features power failure auto-restoration and high / low voltage protection function. The

operation time of components is available through the menus. The expert-level fault diagnosis system can display the

current fault information automatically, facilitating the maintenance. The controller can store 400 records of historical

events. The panel of micro-processing controller is shown in Figure 1-2.

Chapter 1 Overview 3


Figure 1-2 The panel of micro-processing controller

1.4 Environment Requirements

1.4.1 Operation Environment

See Table 1-1 for the details.

Table 1-1 Operation enviroment requirement

Item Requirement

Environment temperature

Indoor: 32°F ~ 104°F

Outdoor:

Water-cooled type: 39.2°F ~ + 113°F;

Air-cooled type: -55°F ~ + 113°F

Protection level (outdoor unit) IP55

Altitude <1000m. Above that, derating is required

Operation voltage range 380V (-10% ~ +15%), three-phase AC, 50Hz

1.4.2 Storage Environment

Table 1-2 Storage enviroment requirement

Item Requirement

Storage environment Indoor, no dust

Environment humidity 5%RH ~ 85%RH (non-condensing)

Environment

temperature -68°F ~ 129.2°F

Storage time Total transportation and storage time should not exceed 6 months. Otherwise, the performance needs

to be re-evaluated

4 Chapter 2 Mechanical Installation


Chapter 2 Mechanical Installation

This chapter introduces the mechanical installation of the Liebert.PEX series air conditioner, which includes

transportation, installation arrangement and installation procedures.

2.1 Transportation, Unpacking And Inspection

2.1.1 Transportation And Movement

Railroad transportation and shipping are the recommended means of transportation. If truck transportation is

unavoidable, choose roads that are less bumpy in order to protect the equipment.

The Liebert.PEX series air conditioner is heavy (see Table 2-1 for the weight parameters). It is recommended to use

mechanical handbarrow such as electric forklift when unpacking and moving the equipment to the place most close to

the installation site. Insert the tines of the forklift below the pallet, as shown in Figure 2-1. Align the tines to the center

of gravity to prevent the unit from falling over.

Figure 2-1 Forklift removal

When moving the indoor unit,, keep the obliquity within 75° ~ 105°, as shown in Figure 2-2.

105 75

Figure 2-2 The obliquity of indoor unit

2.1.2 Unpacking

Move the product to the place most close to the final installation site before unpacking the unit.

Follow the procedures below to unpack the unit:

1. Removing the side boards and top cover

Liebert.PEX series air conditioner uses the international packaging. You can use a hammer or straight screwdriver to

straighten the hook, as shown in Figure 2-3.

Figure 2-3 Straighten the hook

Chapter 2 Mechanical Installation 5


At first, straighten all the hooks that fix side board I, and remove side board 1. Then straighten all the hooks that fix

side board 2, and remove side board 2. At last remove top cover 3, as shown in Figure 2-4.

Kg

1790 x 950 x 2020mm

1816 x 976 x 2175mm

1

2

1

2

3

Figure 2-4 Remove side boards and top cover

2. Removing the pallet

Liebert.PEX series air conditioner is fixed onto the pallet with M10 × 70 screws, as shown in Figure 2-5. You can use

M10 open-end spanner, ratchet spanner or sleeve to remove the screws.

Fixed screw on base pallet (M10 70)

Figure 2-5 Screws on pallet

2.1.3 Inspection

After receiving the product, you should check against the packing list. If any parts are found missing, distorted or

damaged, please report to the carrier immediately. If any covert defects are found, please report to the carrier and the

distributor.

2.2 Installation Notes

To realize the designed performance and maximum product life, the installation must be correct. This section should

be used in conjunction with local industry standards for mechanical and electrical installations.

Liebert.PEX series air-cooled air conditioner is designed for split floor installation. The indoor unit must be installed on

the floor of the equipment room or computer room, and the outdoor unit can be installed outdoors or on the floor of

other rooms. The Liebert.PEX series water-cooled air conditioner is designed for integrated floor installation. It should

be installed on the floor of the equipment room or computer room.



Before installation, make sure that the installation environment meets the requirements (see 1.4 Environment

Requirements) and the building should be transformed to accommodate the construction work of piping, wiring and

ventilation ducts.

Follow the design drawings strictly when installing the equipment, and reserve the space for maintenance. The

manufacturer’s engineering dimensions drawings can serve as a reference.

2.3 System Installation Arrangement

2.3.1 General Arrangement

Liebert.PEX series air conditioner includes air-cooled series and water-cooled series, and the general arrangements

are shown in Figure 2-6 and Figure 2-7 respectively.

Scroll compressorService valve

Suction lineDischarge line

Hot gasbypass valve

(single compressor)

Ball valves

Sensing bulb

Evaporator coil

Dehum solenoid valve


Sight glass

Filter drier

Solenoid valve+

High pressure switch

Charging portLow pressure switch

Condenser coil

Check valve+Distributor

Traps*(every 7.5m

of vertical lift)

(#1 system only)

Figure 2-6 General arrangement diagram of air-cooled series

Note: the hot gas bypass valve is only for the single system unit.

� Note

1. The single system is used as an example to describe the double system.

2. : Factory piping.

3. : Field piping (by others).

4. *: Components are not supplied by Emerson but are recommended for proper circuit operation and maintenance.

5. +: Components are required when the equivalent length exceeds 30m.



Scroll compressor

Service valve

Suction line

Discharge

line

Hot gas

bypass valve(single compressor)

Sensing bulb

Evaporator coil

Dehum solenoid valve


Sight glass

Filter drier

High pressure

Charging port

Low pressure switch

Distributor

#1 circuit only

Isolation valves*

Liquid

Pressure gauges*

Pipe nipple joints

Condenser water out

Condenser water in

Strainer*

Balancing valve*

Water regulating valve

Plate heat exchanger

switchbypassvalve

Figure 2-7 General arrangement diagram of water-cooled series

Note: hot gas bypass valve component is only for the single system unit.

� Note

1. The single system is used as an example to describe the double system.

2. : Factory piping;

3. : Field piping (completed by the technicians).

4. *: Components are not supplied by Emerson but are recommended for proper circuit operation and maintenance.

5. : Components are not supplied by Emerson. Please select and install the female joints according to the dimensions of male

joints provided at the field.



2.3.2 System Installation Sketch Map

The installation mode of air-cooled series unit is shown in Figure 2-8 and Figure 2-9.

� Note

1. If the condenser is installed higher than the compressor, an external back bend should be fitted to the suction line and liquid

return line of the condenser, so as to prevent the liquid refrigerant from flowing back when the condenser stops.

2. The top end of the back bend must be installed higher than the highest copper pipe of the condenser.

Slope dicharge

Back bend (higher than the highest copper pipe of condenser)

Liquid line (do not expose liquid line to sun)

Trap

Heat insulation floorSeal

Outdoor unit

Indoor unit

Floor

The earth surface

Max.7.5m

Max. 20m

Humidifier

Condenser

water in

water out

Figure 2-8 Condenser installed higher than compressor

Slope dicharge

Heat insulation floor

Seal

Outdoor unit

Floor

Condenser water out

Humidifier water in

The earth surface

Max.5m

Slope liquid

Indoor unit

Figure 2-9 Compressor installed higher than condenser



Figure 2-10 shows the arrangement of the cooling water system, which requires the water supply hotter than 39.2°F.

Use heaters if the water source cannot meet this requirement. The cooling tower is the closed type.

Closed cooling tower

Exhaust water valve

Strainer

Drain valve

Ball

Supplementary valve

Manameter

Expansion water tank

FilterPump

P

T

P

T

P

T

Temperaturegauge

valve

PEX Unit

Figure 2-10 Arrangement of cooling water system

2.3.3 Mechanical Paremeters

Indoor unit

The mechanical parameters of the indoor unit are shown in Figure 2-11, Figure 2-12, Figure 2-13 and Table 2-1.

874

853

1970

54

256

400

256

1970

874

853

Figure 2-11 One bay series



1704

400

240 400420

54

256

1970

874

1704

1970

874

Figure 2-12 Two-bay series

54

256

420

400

2553

240400

400465

1970

874

2553

874

1970

Figure 2-13 Three-bay series

Table 2-1 Mechanical parameters of indoor unit

Net weight (kg) Model

Dimensions (W × D × H)

(mm) Air-cooled series Water-cooled series

P1020UW/A, P1020FW/A, P1020DW/A 853 × 874 × 1970 320 320

P1025UW/A, P1025FW/A, P1025DW/A 853 × 874 × 1970 330 330

P1030UW/A, P1030FW/A, P1030DW/A 853 × 874 × 1970 340 340

P1035UW/A, P1035FW/A, P1035DW/A 853 × 874 × 1970 350 350

P2045UW/A, P2045FW/A, P2045DW/A 1704 × 874 × 1970 560 560

P2055UW/A, P2055FW/A, P2055DW/A 1704 × 874 × 1970 570 570

P2040UW/A, P2040FW/A, P2040DW/A 1704 × 874 × 1970 590 590

P2050UW/A, P2050FW/A, P2050DW/A 1704 × 874 × 1970 610 610

P2060UW/A, P2060FW/A, P2060DW/A 1704 × 874 × 1970 640 640

P2070UW/A, P2070FW/A, P2070DW/A 1704 × 874 × 1970 650 650

P3080UW/A, P3080FW/A, P3080DW/A 2553 × 874 × 1970 910 910

P3090UW/A, P3090FW/A, P3090DW/A 2553 × 874 × 1970 930 930

P3100UW/A, P3100FW/A, P3100DW/A 2553 × 874 × 1970 950 950



Plenum

You can select the air supply plenum with grids for the upflow system. The appearance of the plenum is shown in

Figure 2-14, Figure 2-15 and Figure 2-16. The dimensions are listed in Table 2-2.

C

BA

C

BA

Figure 2-14 One bay plenum Figure 2-15 Two bay plenum

C

B

A

Figure 2-16 Three bay plenum

Table 2-2 Dimensions of plenum

Type A B C One bay 867 853 400 (600,optional) Two bay 867 1704 400 (600,optional) Three bay 867 2553 400 (600,optional)

� Note

If the height of the plenum selected for air conditioner unit exceeds 600mm, consult the factory for non-standard production..

Outdoor unit

See Liebert.PEX Condenser User Manual for the dimensions and mechanical parameters.

2.4 Installing Indoor Unit

2.4.1 Preparing Equipment room

The requirements of equipment room are as follows:

1. Damp proof and heat preservation must be done to make sure that the system can operate normally.

2. The equipment room should have good heat insulation and sealed damp proof layer. The damp proof layer of the

ceiling and walls must use polyethylene film, and the coating of the concrete wall and the floor must be damp proof.



3. Prevent the outdoor air from entering the equipment room, because the outdoor air that enters the equipment room

may increase the load of heating, cooling, humidifying and dehumidification of the system. It is recommended that the

inhalation of outdoor air be kept below 5% of the total indoor airflow.

4. All the doors and windows should be closed and the seams should be as narrow as possible.

2.4.2 Installation Space

� Note

Liebert.PEX series air conditioner system will generate condensed water, and water leakage may damage the precision equipment

nearby. So do not install the system in the vicinity of any precision equipment, and the installation site must provide draining

pipes.

1. To ensure normal operation, the installation space for the indoor unit shall be capacious enough.

2. Too small space for the indoor unit will baffle the airflow, shorten the cooling cycle; the air supply and air exhaust

may mix, and the decibel may rise.

3. Do not place the indoor unit in a concave or at the end of a strip area.

4. Do not huddle multiple indoor units, lest there should be mixed airflow, unbalanced load and competitive operation.

5. For the convenience of daily maintenance, do not install other equipment (such as smoke detector) above the

cabinet.

Figure 2-17 shows the installation place of the indoor unit.

Good place

Unit

Unit

Note:

The reserved maintenance space while installing

600600 600

Bad place

Figure 2-17 Installation place of indoor unit (unit: mm)

2.4.3 Requirement Of Maintenance Space

Leave more than 600mm of maintenance space in the front and two sides of the indoor unit, as shown in Figure 2-17.



2.4.4 Installation Procedures

The installation procedures of indoor unit are as follows:

1. Make the mounting base according to the dimensions in Figure 2-18, Figure 2-19 and Figure 2-20 and the

requirements in Table 2-3. You can make it by yourself or contact Emerson Network Power Co., Ltd. for non-standard

production.

161.5

530

161.5

67

680.5820

760

853

H

46.5

Steel plate

Angle steel

Installation hole

for expansion bolt

4-Ф14 cabinet installation hole

Rubber cushion(top)

Front side of cabinet

Rubber cushion (bottom)

Rear side ofcabinet

Rubber cushion (lateral)

46.5

Figure 2-18 Mounting base of one bay series

1704 730

121.5

67

820

683

46.5

1610

H

46.5


Rear side of cabinet

Rubber cushion (top)

Angle steel


Steel plateRubber cushion (bottom)

Installation holefor expansion bolt


Upflow

7301704121.5

46.5

67

820

593

1610

46.5

H



Installation holefor expansion bolt


Rubber cushion (top)Angle steel


Steel plateRubber cushion (bottom)

Downflow

Figure 2-19 Mounting base of two bay series



46.5

820

1610

161.567

530

730

683

121.5

67

680.5820

46.5

760

2553

H

8-Ф14



Installation hole for expansion bolt


Rubber cushion(top)

Angle steel

cabinet installation hole

Steel plate

Rubber cushion (bottom)

Upflow

67730

121.5

680.5

161.5

67

820

530

46.5

760

1610

2553

593

820

46.5

H

8-Ф14

Installation hole for expansion bolt


Angle steel

Steel plate

Rubber cushion(bottom)


Rubber cushion (top)

cabinet installation hole


Downflow

Figure 2-20 Mounting base of three bay series

Table 2-3 Specifications of indoor unit mounting base

Item Specification Remark

Steel plate 100mm × 100mm × (5 ~ 6.5)mm -

Angle steel 40mm × 40mm × 3mm -

Top Thickness: 3mm ~ 5mm -

Lateral Thickness: 2mm ~ 3mm - Rubber

cushion Botton Thickness: 10mm ~ 12mm -

Installation hole for

expansion hole - Install the holes according to your requirements

One bay

Two bay H

Three bay

H = 200mm (upflow unit)

H = 300mm (downflow unit, according to the floor

height)

1. Only three-bay unit needs the middle leg

support (front and rear)

2. The upflow unit do not need the flow deflector

3. The H dimension is only a reference. It should

be determined accroding to your actual

requirements during making the mounting base

Note:

The external side boards of the unit cannot bear weight. Take this into consideration while selecting angle steel and fixing holes

2. Lay a layer of rubber cushion on the top, lateral of mounting base and on the bottom of the steel plate respectively.

See Figure 2-18, Figure 2-19 and Figure 2-20 for their positions and see Table 2-3 for the thickness.

3. Identify the installation position. Fix the mounting base onto the mounting base according to the site conditions and

your requirement.

4. Fix the AC unit onto the mounting base with nuts, spring washers, flat washers and bolts.



2.5 Installing Outdoor Unit

This section is only available to air-cooled series. See Liebert.PEX Condenser User Manual for the detailed

installation.

2.6 Piping

2.6.1 Piping For Air-Cooled Unit

All joints of the cooling pipes must be silver brazed. Standard industry procedures must be followed in selecting, laying,

and fixing the pipes, and in vacuuming the system and charging refrigerant. Take pipeline pressure drop, oil return to

the compressor and minimization of noise and vibration into consideration during the design and construction.

General

The recommended pipe sizes are ‘equivalent lengths’ (see Table 2-5 for equivalent lengths of partial components),

which has included the resistance brought about by bends. You should confirm that the sizes are appropriate for the

site conditions.

1. If the one-way equivalent length exceeds 30m, or if the vertical difference between indoor unit and outdoor unit

exceeds the values in Table 2-4, consult the factory before installation for confirmation whether extended components

are needed.

Table 2-4 Vertical difference between indoor unit and outdoor unit

Relative position Value

Indoor unti lower than outdoor unit Max.: +20m

Outdoor unit lower than indoor unit Max.: -5m

2. The pipe sizes recommended in Table 2-5 are ‘equivalent lengths’, which has included the resistance brought about

by bends and valves. You should confirm that the sizes are appropriate for the site conditions.

Table 2-5 Equivalent lengths of partial components

Equivalent length (m) Outer Diameter (OD) of

liquid pipe (inch) 90°bend 45°bend T type three way

3/8 0.21 0.10 0.76

1/2 0.24 0.12 0.76

5/8 0.27 0.15 0.76

3/4 0.3 0.18 0.76

7/8 0.44 0.24 1.1

1-1/8 0.56 0.3 1.4

� Note

A trap is required for every 7.5m of vertical lift. Please consult the factory for detailed information.

Connecting pipes

The pipes to connect include:

1. Cooling water drain-pipe of indoor unit

2. Water supply pipe of infrared humidifier

3. Connecting copper pipe (exhaust pipe and liquid return pipe) between indoor unit and outdoor unit

4. Installing extension subassembly (optional)

� Connecting cooling water drain-pipe of indoor unit

The cooling water of infrared humidifier and evaporator is converged by the cross connector and drains through the

draining pipe, as shown in Figure 2-21. The OD of the pipe is 25mm. If the draining pipe is used by three or more units,

the minimal OD of the pipe should be 40mm.

� Note

Because the humidifier contains boiling water, the plastic pipe must be rated higher than 194°F.



Water supply pipe of

infrared humidifier

Connector of condensation

water drain pipe

To condensation water

pan of evaporator

To infrared humidifier

water pan

Cross connectorHose clamp

To condensation water

pan of evaporator

To the condensation

water drain pipe

Figure 2-21 Connection of drain pipe

� Note

1. A Φ25 hose clamp is delivered as an accessory to connect the draining pipe.

2. When connecting the draining pipe, make sure that the U bend is installed vertically and the ‘U’ shape is not distorted, so as to

ensure that the cooling water can be drained immediately and effectively.

� Connecting water supply pipe of infrared humidifier

Connect water pipes for the infrared humidifier. To facilitate maintenance, a strainer / non-return isolation valve is fitted

to the supply water pipe. The infrared humidifier reserves a copper pipe (OD: 6.35mm) as shown in Figure 2-22.

Connect it with pipes according to the site condition. Make sure the connection is well sealed to prevent leakage. The

pipe pressure is 100kPa ~ 700kPa.

Where the main pressure may rise above 700kPa, a pressure reducer should be fitted. Where the pressure falls below

100kPa, a water tank and pump system should be used.

� Note

Main water supply connections must be made in accordance with local laws and regulations.

Water supply solenoid valve

Water level sensor

Water supply pipe

Ceramic terminal socket

Over-temperature

protection relay

Water pan (removable)

OD6.35mm

Over-temperature protection

switch (under the pan)Water pan fixing screw

Water level regulator

Stainless steel bolt

Over-temperature

protection switch

Water outlet

A direction

Wiring cover plate

A direction

Water supply pipe

Figure 2-22 Discharge pipe / liquid return pipe

� Connecting copper pipe (exhaust pipe and liquid return pipe) between indoor unit and outdoor unit



The indoor unit and outdoor unit are connected through welded copper pipes. The connection of discharge pipe / liquid

pipe of indoor unit is shown in Figure 2-23. Note that the ball valve must be wrapped with a wet cloth before welding. In

addition, many notes and instruction labels are pasted onto the base board and side board close to the ball valve. Do

not have them burned during the welding operation.

� Note

The exposure time of system pipes do not exceed 15min. Otherwise, it will lead to the POE refrigeration oil moisture effect the

life of the key components and the system operation stability.

Horizontal sections of discharge pipes should be sloped downward from the compressor, with a slope of at least 1:200

(5mm down for each 1m run). Discharge pipes should be heat insulated where they are routed in the conditioned

space (including under a raised floor).

The liquid pressure drop should not exceed 40kPa (5psi ~6psi), provided that there is no loss of refrigeration. The

liquid line pressure drop is the sum of liquid flow resistance from the tubing and fitting (including the drier), plus the

loss of head pressure due to elevation above the condenser. If the liquid temperature is 100.4°F, the static pressure

loss is 11kPa (1.6 psi) per meter of lift.

Ball valve(liquid line)Ball valve(discherge line)

Figure 2-23 Connection of discharge pipe / liquid return pipe

Considering the effect of the pipe OD to the system pressure drop, the pipe OD of indoor unit and outdoor unit should

be determined according to the specifications listed Table 2-6.

Table 2-6 Recommended pipe sizes

Recommended pipe size

Model P1020 P1025 P1030 P1035 P2040 P2045 P2050

Eq.Lgth D L D L D L D L D L D L D L

10m 22 13 22 13 22 13 22 13 22 13 22 13 22 13

20m 22 13 22 13 22 13 22 16 22 13 22 16 22 13

30m 22 13 22 13 22 16 25 16 22 13 25 16 22 13

40m* 22 13 22 13 22 16 25 16 22 13 25 16 22 13

50m* 22 13 22 16 25 16 25 16 22 13 28 19 22 16

60m* 22 16 22 16 25 16 25 19 22 16 28 19 22 16

Model P2055 P2060 P2070 P3080 P3090 P3100

Eq.Lgth D L D L D L D L D L D L

10m 22 16 22 13 22 13 22 13 22 13 22 16

20m 25 16 22 13 22 16 22 16 25 16 25 16

30m 28 19 22 16 25 16 25 16 25 16 28 19

40m* 28 19 22 16 25 16 25 16 25 16 28 19

50m* 28 19 25 16 25 16 28 19 28 19 28 19

60m* 32 19 25 16 25 19 28 19 28 19 32 19

Notes：

1. Extension subassembly should be added to the “Eq.Lgth” marked with *.

2. D: discharge line, L: liquid line.

3. Consult factory if the line length exceeds 60m

� Installing the extension subassembly (be applicable to site installation)

When the equivalent length of pipe exceeds 30m, the extension subassembly should be installed. It is recommended

to install the solenoid valve of the extension subassembly to the outside project pipe of the ball valve on the liquid pipe,

or the outer side (or on the bottom) of the unit.



So, during installing the solenoid valve, you need not to cut the indoor unit pipes. After the whole system is installed,

you can open the ball valve to keep pressure and carry out vacuum operation, avoiding the moisture absorption of the

compressor refrigeration oil and ensuring the operation safety and life of the compressor. For installation valve of the

check valve, refer to Figure 2-6.

For the electrical connections of the extension subassembly, refer to 3.2.4 Wiring Of Extension Subassembly

Solenoid Valve (For Site Installation).

Charging refrigerant and adding refrigerant oil

1. Charging with refrigerant

The Liebert.PEX air-cooled series air conditioner had been charged with 2bar nitrogen to keep pressure at the factory.

For initial charging capacity, refer to the step 5 in 4.2.2 Commissioning Procedures. If the connecting pipe between

the indoor unit and the outdoor unit is longer than 10m, add refrigerant to the system in order to ensure normal system

operation.

The amount of the refrigerant is calculated through the following formula:

Refrigerant amount (kg) = unit length liquid pipe refrigerant amount (kg/m) × length of extended pipe (m)

See Table 2-7 for the unit length liquid pipe refrigerant amount.

Length of extended pipe (m) = Total length of liquid pipe (m) - 10m

Table 2-7 Unit length liquid pipe refrigerant amount of pipes with different ODs

Pipe OD (mm) Unit length liquid pipe refrigerant

amount (kg/m) Pipe OD (mm)

Unit length liquid pipe refrigerant

amount (kg/m)

9.52 0.060 19 0.261

12.7 0.112 22 0.362

16 0.181

28.6 0.618

2. Adding refrigerant oil

The added refrigerant will dilute the refrigerant oil in the system, undermining the lubricating and cooling effects of the

refrigerant oil. Therefore more refrigerant oil should be added. See the formula below:

Amount of refrigerant oil to be added = amount of added refrigerant × 22.6ml

2.6.2 Connecting Pipes For Water-cooled Units

Each cooling system uses a Plate Heat Exchanger (PHE, or condenser) and a water-regulating valve. The system

requires connecting water supply pipe and water drain pipe to condenser. See Figure 2-24.

A filter (filter mesh: 1mm) and multiple isolation valves should be mounted to the condenser water supply pipe. One of

the valves can be a balancing valve.

The pumping effect of the condenser water system with a balancing valve will be better, because it can better control

the water distribution. On the other hand, the water-regulating valve can keep the optimal condensing temperature by

regulating the water flow.

It is recommended to arrange the cooling water pipes separately for different systems, so that repairing one pipe will

not affect the operation of another one.

The water pressure should be high enough to counteract the pressure drops brought about by all the components of

the water system. In addition, because the sediments and impurities cause more pressure drop after long term

operation, arrange a redundancy of 20% ~ 25% when selecting the lifting part (like the pump).

See Figure 2-7 for the layout of the water-cooled system.

Connecting pipes

The following pipes need to be connected:

� Drain pipe of condensing water for indoor unit

See 2.6.1 Piping For Air-Cooled Unit.

� Water supply pipe for infrared humidifier

See 2.6.1 Piping For Air-Cooled Unit.

� Water pipes at the condenser side



The male connector of the water inlet / outlet for Liebert.PEX indoor unit is shown in Figure 2-24. You can select a

suitable female connector, or connect through welding. However, screw connection is recommended. Make sure the

junction is well sealed.

PHE

Waterflow regulator

Screw connector

Screw connector

(G1-1/4")

(G1-1/4")

Water

inlet

Water

outlet

Figure 2-24 Screw connector (water-cooled)

2.7 Base/Side Panel Cutout Locations

Base cutout locations

Figure 2-25 and Figure 2-26 show the base figures with the side panel removed, and the distance between the dashed

lines and the rear panels is 25 mm, where is the mounting place of inner side panel.

530160

72.5

80

200

45 760

72

45

109

798680.5

161

140

D

IRWI

F

F F

F

P40

K K

25

25

4- 13 knock-out

2- 35 knock-out

2- 64 knock-out

WI/DL

WO/LL

Φ

Φ

ΦΦ

One bay upflow series

730120

45

683

45

166

70 183

116

45

81

70

55

81

F F

F F

Pk kkk

25 25

4- 13knock-out

WO/LL/D4- 64 knock-out

WI/DL/IRWI

WI/DL

WO/LL 40 knock-out

Φ

ΦΦ

Two bay upflow series



73012045

683

45

166

70 183

116

90

81

81

F F

F F

Pk kkk

25

530

72.5

45

72.5

62.5

25

kk

F F

F F

P

161

80

200

D

8- 13 knock-out

6- 64 knock-out

WI/DL/IRWI

WO/LL/D

2- 35 knock-outWI/DL

WO/LL2- 40knock-out

WI/DL

WO/LL

Φ

Φ

Φ

Φ

Three bay upflow series

IRWI: Infrared humidifier water in D: Drain P: Power cable entry (Φ30)

F: Unit set screw K: Knock-out LL/DL: Liquid line / discharge line (air-cooled models)

WI/WO: Condenser water inlet and outlet (water-cooled

models)

Figure 2-25 Base cutout location of upflow models

160 530

680.5

72.5 45

143

80

45

140

103.575

45

81

72.5

70

40

kk

D

IRWI

P

FF

Fan aperture

2- 35 knock-out

4- 13

WI/DL

WO/LL

2- 64 knock-out

Φ

Φ

Φ

Φ

One bay downflow series

730120

45

593

160

817.980

45123

187.8

230

80

70

80 148

160

50

40

50

70

50

2- 35 knock-out

Fan aperture

k k k k

F F

FF

P

Fan aperture

4- 64 knock-out

WO/LL/D WI/DL/IRWI

4- 13 knock-out

WI/DL

WO/LL

Φ

ΦΦ

45

Φ

Φ

Two bay downflow series



120 730

593

70

160

123 80

70230

80

80

70

148

45

90

50

50

160 45

70

80

143

72.5

81

75 103.5

45

140

45

72.5

1010 530

45

40

40k k k k k k

F F F F

F

P

F

F

P

F

Fan aperture Fan aperture Fan aperture

2- 35 knock-out

WI/DL/IRWI

6- 64 knock-out

WO/LL/DWI/DLWO/LL

2- 35 knock-out

WI/DLWO/LL

Φ

8- 13Φ

Φ

Φ

Φ

Φ

Three bay downflow series

P: Power cable entry D: Drain

IRWI: Infrared humidifier water in K: Knock-out (250×120)

F: Unit set screw LL/DL: Liquid line / discharge line (air-cooled models)

WI/WO: Condenser water inlet and outlet (water-cooled models)

Figure 2-26 Base cutout location of downflow models

Side panel cotout locations

If piping and wiring from the base is different, connection from side panel can be selected. The locations and

dimensions of knock-out holes are shown in Figure 2-27. You can select the in and out holes according to the factual

needs, but must confirm that any two cables of pipe, power cable and signal cable can not use the same hole.

Figure 2-27 Knock-out holes of side panel

2.8 Removing Transport Fastener And Vibration Absorber

In order to protect partial components from damaging and distorting due to bumping, impact and resonation, fasteners

and vibration absorbers are mounted at certain locations before delivery. Remove the fasteners and vibration

absorbers before installation and commissioning.

Removing transport fixing plate from the compressor

To reduce the compressor operation vibration and noise, the vibration absorbing cushions are added to the

compressor base. However, such device cannot best restrain the equipment vibration during the transportation,

resulting in loosened connections and wearing of certain parts. To counteract such effect, three L shaped plates are

added to the compressor base during the transportation, as shown in Figure 2-28.



Fixing plates

Figure 2-28 Compressor fixing plates

After the installation and before the commissioning, remove the three fixing plates, then restore the washers and bolts.

The fastening torque of the bolts is (12 ± 1)N.m.

Removing transport fastener of fan compoents

1. Upflow unit

The motor base of the fan is designed with a semi-free self-tension structure to minimize the fan operation noise and

prolong the belt life. During the transportation, to protect the semi-free structure from failing or collapsing due to

resonation, the upflow unit is especially fastened with bolts (left and right symmetrical, two at either side), as shown in

Figure 2-29. You should cut the binding string on the belt and remove the four fixing bolts before the power-on

operation, otherwise the fan could be damaged and even cause personal injury. Removing the bolts requires the

collaboration of two persons, with one holding the motor and the other removing the bolts.

� Note

After you open the front door of unit, you will see a warning label concerning bolt removal on the sealing panel of the fan. Do

remove the bolts by following the preceding instructions.

Transportation bolts

(two on either side)

Binding string

Figure 2-29 Fixed bolts and trap wrench of transport fan components

2. Downflow unit

During the transportation, some cushion foam is inserted into the triangle formed by the motor base and the fan.

Remove the foam before the power-on operation.

� Warning

Never put hands into the triangle gap between the motor base and fan.

Removing the transport components of infrared humidifier

In order to protect the infrared humidifier pump from damaging due to bumping, the transport fasteners should be fitted

to the infrared humidifier components. Before operating the unit, remove the transport fasteners. If using without

removal, the unit will generate a high water level alarm and the infrared humidifier cannot operate normally.



Removing procedures are as follows:

1. Remove the rubber string used to fix the water switch, as shown in Figure 2-30.

Bolts

Fastener 1

Remo

ving d

irection

Rubber string to fix

the water switch

Figure 2-30 Transport fastener of infrared humidifier (1)

2. Remove two bolts and then fastener 1 along the arrow direction, as shown in Figure 2-30.

3. Remove two bolts shown in Figure 2-31. Pull out the barb gently and then remove the fastener 2 along the arrow

direction, as shown in Figure 2-31.

Barb

Remo

ving

direction

Fastener 2

Bolts Fastener 2

Figure 2-31 Transport fastener of infrared humidifier (2)

Removing fastener of pipes

During the transportation, to prevent the long copper pipes from scratching the metal plate and get damaged, the pipes

are cushioned with foam or bound up before delivery. Remove those materials before the power-on commissioning.

2.9 Component Adjustment

Water level regulator

The water level regulator of the infrared humidifier is screwed down completely. Before the commissioning, unscrew

the water level regulator till its head is 45mm above the water pan bottom, as shown in Figure 2-32.



45mm

Figure 2-32 Water level regulator adjustment

2.10 Installation Inspection

After the mechanical installation is completed, you should check:

1. A certain space is left around the unit for maintenance.

2. The equipment is installed vertically and the installation fasteners have been fixed.

3. The pipes connecting the indoor unit and outdoor unit have been connected, and the ball valves of indoor unit and

outdoor unit have been opened completely.

4. The condensate pump (if needed) has been installed.

5. The draining pipe has been connected.

6. The water supply pipe for infrared humidifier has been connected.

7. All pipe joints have been fixed.

8. The transport fasteners have been removed.

9. The water level regulator of the infrared humidifier has been unscrewed to the required height.

10. The debris (such as transportation material, structure material and tools) inside or around the equipment has been

cleaned.

After confirming the preceding points, you can then start the electrical installation.

Chapter 3 Electrical Installation 25


Chapter 3 Electrical Installation

This chapter introduces the electrical installation of the Liebert.PEX series air conditioner, which includes work

introduction, installation notes, wiring of indoor unit, connecting power cables for outdoor unit and installation

inspection.

3.1 Work Introduction And Notes

Wires to connect on-site

1. The power cable of indoor unit.

2. Outdoor unit (air-cooled): standard signal cable.

3. Input and output control cables.

Notes

1. The connection of all power cables, control cables and ground cables should comply with local electrician

regulations.

2. See the equipment nameplate for the full load current. The cable sizes should meet the local wiring rules.

3. Mains supply requirement: 380Vac, 50Hz.

4. The electrical installation must be completed by trained personnel.

5. Before the wiring, use a multimeter to measure the power supply voltage and make sure that the power supply has

been switched off.

3.2 Wiring Of Indoor Unit

3.2.1 Locating Electrical Interface Of Indoor Unit

Open the front door of the indoor unit, and you will see the interfaces of the electrical control box, as shown in Figure

3-1, Figure 3-2 and Figure 3-3.

电源接口

N/PE端子排控制接口

Power interface

Control interface N/PE terminal block

Figure 3-1 Interfaces of electrical control box of one-bay system

26 Chapter 3 Electrical Installation


控制接口 N/PE端子排

电源接口

Control interface N/PE terminal block

Power interface

Figure 3-2 Interfaces of electrical control box of two-bay system

� Note

The two-bay single system has only one compressor MCB and contactor.

控制接口 N/PE端子排

电源接口

P/N terminal blockControl interface

Power supply interface

N/PE terminal block

Power interface

Figure 3-3 Interfaces of electrical control box of three-bay system

3.2.2 Connecting Power Cable Of Indoor Unit

The power interfaces are located as shown in Figure 3-1, Figure 3-2 and Figure 3-3. The power interface is amplified

as shown in Figure 3-4. Connect terminals L1 ~ L3, N, and PE to their counterparts of external power supply.

Fix the input cables to the cable clamp, as shown in Figure 3-5. As for the cable specification, see the unit maximum

operation current in Table 3-1.

L1 L2 L3

N

N

PE

PE

Cable clamp

Figure 3-4 Amplified figure of power supply interface Figure 3-5 Cable clamp

� Note

The cable sizes should meet the local wiring rules.

Table 3-1 System maximum operation current (unit: A)

Model Upflow air-cooled series UA Upflow water-cooled series UW Downflow air-cooled series FA Downflow water-cooled series FW



Model Upflow air-cooled series UA Upflow water-cooled series UW Downflow air-cooled series FA Downflow water-cooled series FW

1020 23.1 23.1 23.1 23.1

1025 25.2 25.2 25.2 25.2 1030 30.4 30.4 30.4 30.4 1035 32.3 32.3 32.3 32.3 2040 42.9 42.9 42.9 42.9 2045 48.5 48.5 48.5 48.5 2050 47.1 47.1 47.1 47.1 2055 53.5 53.5 53.5 53.5 2060 57.5 57.5 57.5 57.5 2070 61.3 61.3 61.3 61.3 3080 71.9 71.9 71.9 71.9

3090 77.7 77.7 77.7 77.7 3100 87.7 87.7 87.7 87.7

3.2.3 Connecting Control Cables

The control interfaces are located as shown in Figure 3-1, Figure 3-2 and Figure 3-3. The control interface is amplified

in Figure 3-6. The upper part of the terminal block is connected to the system, while the lower part is used as user

control signal interfaces.

94

37C

7589 76

8459 85 5137

9695 9197

37B38C 38B

9392 8180

2438 50

72

71

771211 78

5655 70

73

71A70A5882

83 88

42 44

4341

41 43 83 88 89 75 76 94 95 96 97 91 92 93 80 81 11 12 77 78 72 73

42 38C44 8482 58 59 37C85 513838B37B 37 24 50 5655 70 70A71 71A

Short connecting line, no short line ifthe remote shut down is connected

50,51,55 is defined alarm terminals,

Connecting with common alarm

Connecting with smoke sensor,Alarm output of smoke sensor

24# is its common terminal

91# is its common terminal

Figure 3-6 Control interfaces

� Note

The wiring personnel must take antistatic measures before wiring the control cables.

Water-under-floor sensor

Every unit is supplied with one water sensor. You should connect one end of the sensor to terminal 51, and the other

end to the common terminal 24. The number of sensors in parallel connection is not limited, but there is only one water

alarm for each unit.

Remote shutdown

Terminals 37 and 38 can be connected to the remote shutdown switch. By default, terminals 37 and 38 are shorted.

Remove the shorting wire if remote shutdown is needed. When terminals 37 and 38 are open, the system is shut down.

Terminals 37C, 38C, 37B and 38B are series connected between terminals 37 and 38 (the connecting wire is user

self-prepared), so that you can series connect three remote shutdown devices.

Smoke sensor

The smoke sensor can be connected to terminals 91, 92 and 93, with 91 being the common terminal, 92 being the NO

contact, and 93 the NC contact. You can select NO or NC contact according to the smoke sensor logic.

Terminals 80 and 81 are used to output external alarms for the smoke sensor.

28 Chapter 3 Electrical Installation


Control signals of outdoor unit

Terminals 70, 71, and terminals 70A, 71A are two pairs of control signal input terminals of outdoor unit. Their on/off

state is the same as that of the compressor.

Customized alarm terminals

Terminals 50, 51, 55 can be connected to three kinds of sensors, including fire sensor and water sensor. Terminal 24 is

the common terminal. After connecting sensors to the terminals, you should set the corresponding customized alarm

through the microprocessor. See 5.7.6 SET ALARMS for details. When the contactor is open and there is no external

alarm, the input state of the customized terminal is open. But when the contactor is closed and the external alarm is

raised, the input state of the customized terminal will be shorted. At this time, the system will raise sirens, and the LCD

of indoor unit will display the alarm information. If a PC installed with Emerson monitoring software is connected to the

system, the alarm will also be displayed on the PC.

The terminals can be defined as follows:

Terminals 50 and 24: remote alarm.

Terminals 51 and 24: water sensor (by default).

Terminals 55 and 24: safe switch for condensation water pump (optional).

External alarm terminals

Terminals 75 and 76 can be used as external alarm terminals. They are controlled by the external alarm relay K3 on

the circuit board. They output signals to external alarm devices, such as the alarm indicator. When critical alarm occurs,

the contactor will close to trigger remote alarms, send signals to the building management system or dial the paging

system automatically. The power supply of the external alarm system is user self-prepared.

Refer to Appendix 2 Circuit Diagram for the detailed definition of other terminals.

3.2.4 Connecting Extension Component Solenoid Valve (For Site Installation)

The extension subassembly solenoid valve has three connection cables, two of which are control cables (brown) used

to connect with the corresponding terminals of control board and one of which is ground cable used to connect the

ground terminal block. Note that the solenoid valve cables of 1# system and 2# system in double system unit should

be remarked for voiding wrong connection. For detailed terminal positions, refer to the LLSV1 and LLSV2 connection

terminal No. in Appendix 2 Circuit Diagram.

3.2.5 Connecting Control Signal Cables Of Outdoor Unit

Opening the sealed panel of electric control box reveals the fan speed controller board, according to the cable

connection instructions of Liebert.PEX Condenser User Manual.

When a condenser with single system is used to match an indoor unit with single system, the digital signal of J6 dry

contact (see 3.1 Wiring Terminals in Liebert.PEX Condenser User Manual) is from the control interface 70/71 (see

Figure 3-6) of indoor unit.

When two condensers with single system are used to match an indoor unit with double system, the digital signals of J6

dry contact on the boards of those two condensers are from the control interface 70/71 and 70A/71A respectively.

When a condenser with double system is used to match an indoor unit with double system, you short the terminals 70

& 70A and 71 & 71A. The control circuit can be connected to the terminals 70 and 71 or terminals 70A and 71A.

For details, refer to Appendix 2 Circuit Diagram.

3.2.6 Connecting Power Cables For Outdoor Unit

The power cables of the outdoor unit is connected with the MCB reserved in indoor unit (see Figure 4-1, Figure 4-2

and Figure 4-3).

3.3 Installation Inspection

After the electrical installation is completed, you should check and confirm that:

1. The power resource voltage meets the rating on the nameplate.

2. The system electric loop has no open circuit or short circuit.

3. Power cables and grounding cables are connected to the circuit breakers, indoor unit and outdoor unit.



4. The ratings of the circuit breakers and fuses are correct.

5. The control cables are properly connected.

6. All the cables connections are fastened, with no loose screws.

You can start commissioning after confirming the preceding points.

30 Chapter 4 System Start-up And Commissioning


Chapter 4 System Start-Up And Commissioning

This chapter introduces the power-on commissioning and function test of air-cooled series and water-cooled series,

including the preparation before commissioning and commissioning procedures.

4.1 Location Of MCBs

The MCBs are located as shown in Figure 4-1, Figure 4-2 and Figure 4-3.

7

123456 123456

7

Figure 4-1 MCB of one bay system

7

123456 123456

7

Figure 4-2 MCB of two bay system

� Note

The two-bay single system has only one compressor MCB and one compressor contactor.

7

123456 123456

7

Figure 4-3 MCB of three bay system

1: Compressor MCB 3: Electrical heater MCB 5: Outdoor unit (air-cooled) MCB 7: Main isolation switch

2: Fan MCB 4: Infrared humidifier MCB 6: Control board MCB

Chapter 4 System Start-up And Commissioning 31


4.2 Power-on Commissioning Of Air-Cooled Series

4.2.1 Preparation Before Commissioning

Mechanical part

1. Check that the protection materials for transportation have been removed. For the upflow series unit, check that the

transportation bolts of the fan have been removed; check that the motor pulley and the fan pulley are fixed, the motor

bearing and fan bearing are parallel, the belt is perpendicular to the two bearings and the tension of the belt is proper.

2. The cooling pipe system has past the pressure leak test.

3. The total charge has been roughly calculated. If the pipe is too long, the rated amount of refrigerant oil should have

been charged into the system.

4. The water supply & drain pipe-system of the humidification system has been reliably connected, the material

requirement is met and the leak detection has been done.

5. The heating tape of the compressor has been preheated for over 12hr.

6. Make sure the equipment room is above 68°F with certain heat load. Otherwise, pre-heat the equipment room with

any heating device, or by forcedly running the heaters of the unit (in this case, go through the following procedures till

the third entry of 4.2.2 Commissioning Procedures first) and of other equipment in the room. Ensure sufficient heat

load for the commissioning.

7. In the winter, it may be necessary to manually raise the condensing pressure to 16Bar by manually shielding some

condensing area and limiting condensing air quantity.

Electric part

1. Check that the voltage of the main power supply is within ±10% of the rating, and that the isolation switch of the

air-cooled condenser of the outdoor unit has been closed.

2. Check that the power or control circuits are reliably connected. Fasten all the connecting terminals.

3. The power cables and the low voltage control cables are laid away from each other.

4. Check the phase sequence. The phase sequences of all three-phase devices have been adjusted consistent before

delivery. During commissioning, you only need to ensure the phase sequence of a random three-phase device is

correct. In step two of 4.2.2 Commissioning Procedures, if you run the fan by clicking on the fan contactor in the

electric control box with a straight screwdriver, you can judge the phase sequence by observing the wind direction. If

the phase sequence is wrong, exchange any two phases of the L line of the power supply.

4.2.2 Commissioning Procedures

1. Turn off the MCB of various parts. Turn on the isolation switches and control MCBs. Check the control voltage.

2. Click on the fan contactor with a screwdriver to start the fan and make sure the fan blowing direction is correct. Start

the system and measure all the operation phase-currents of the fan.

3. Turn on the electric heating MCB and change the temperature setting to start the heater, or start the heater manually.

Measure all the phase currents of the electric reheat.

To trigger the heater, you should:

Adjust the temperature setting (see 5.7 SERVICE MENUS) to 41°F higher than the equipment room temperature.

The control system should then trigger the heating demand, and the electric reheat starts to work. Then adjust the

temperature setting to 41°F lower than the equipment room temperature. If the heater stops working, it means the

heating function is normal. Then continue with the following procedures.

4. Turn on the humidifier MCB and change the humidity setting to start the humidifier, or start the humidifier manually.

Measure all the phase currents of the humidifier. In addition, inject water manually to make sure the filling pipe and

drainage conduit do not leak, and the drainage conduit is clear.

To trigger the humidifier, you should:

Adjust the humidity setting (see 5.7 SERVICE MENUS) to 10% higher than the indoor Relative Humidity (RH). The

control system should then trigger the humidifying demand, and the humidifier starts to work. If the humidifier stops

working when the humidity setting is lower than the indoor RH, it means the humidifying function is normal.

� Note

After the test, restore the temperature and humidity settings to the defaults or the original settings.



5. Pump the cooling system vacuum to -30in.Hg (pumping time: >3hrs), and hold the state for 4hr. The pressure

should not rise, and the sight glass appears green (to make sure the cooling system vacuum and dry, pump the

cooling system repeatedly at least three times).

After checking the vacuum state of the cooling system, pump in proper amount of liquid refrigerant quickly before the

power-on (usually pump until the pressures inside the refrigerant container equalizes with that in the cooling system).

Connect the composite pressure gauge to the interface on the high/low pressure needle valve.

Connect the composite pressure gauge to the refrigerant cylinder. Note to exhaust the air inside the tube of the gauge.

1) Change the temperature setting to start cooling, or start cooling manually. Make sure the dehumidification and hot

gas bypass valve is closed. Measure in real time all the phase currents of the compressor.

To start cooling (start the compressor), you should:

Change the temperature setting (see 5.7 SERVICE MENUS) to 41°F lower than the indoor temperature. The control

system should then trigger the cooling demand, and the compressor starts to work. After at least three minutes of

cooling, change the temperature setting to 41°F higher than the indoor temperature. If the compressor stops working

then, it means the cooling function is normal.

� Note

After the test, restore the temperature setting to the default or the original setting.

2) Check and confirm the working current of the condenser fan. Make sure the fan runs stably.

3) Start the compressor, and charge refrigerant gas (R22) or refrigerant liquid (R407C) slowly to the compressor inlet

until the subcooling degree reaches 5K (or 8K ~ 10K) and the sight glass contains no air bulbs.

The condensing temperature should be kept at 113°F.

Keep charging and adjust the thermostatic expansion valve to 41°F ~ 46.4°F superheat degree. The adjustment step

of the valve should be smaller than 1/4 round, and the interval between two steps should be at least 15min.

Observe the compressor suction pipes and make sure there is no water condensing on the surface of the compressor

and the pipes, so as to avoid the risk of slugging the compressor.

At the return of 71.6°F/50%, 16Bar ~ 17Bar condensing pressure, the compressor suction pressure should be above 5

Bar.

At the return of 75.2°F/50%, 16Bar ~ 17Bar condensing pressure, he compressor suction pressure should be above

5.5Bar.

4) Check the dehumidification function

To trigger dehumidification, you should:

Change the humidify setting (see 5.7 SERVICE MENUS) to 10% lower than the indoor RH. The control system

should then trigger the call for dehumidification, the dehumidification solenoid valve switches on, and the

dehumidification indicator Q3 on the control panel turns on. Then change the humidity setting higher than the indoor

RH. If the dehumidification solenoid valve switches off, and the dehumidification indicator Q3 turns off, it means the

dehumidification function is normal. Note that during the commissioning process, if the indoor temperature is 37.4°F

higher than the temperature setting, the system may enter the forced cooling mode, and the dehumidification demand

will not be responded.

� Note

After the test, restore the humidity setting to the default or the original setting.

4.2.3 Commissioning Complete Inspection

1. Check that all output functions are automatic.

2. Check that the temperature & humidity settings and control precisions are set reasonable.

3. Make sure all the other functions are set reasonable.

Chapter 4 System Start-up And Commissioning 33


4.3 Start-up Commissioning Of Water-cooled Series

4.3.1 Preparation Before Commissioning

Machine and system part

1. Check that the protection materials during transportation has been removed; for the upflow series unit, especially

check that the transport bolts of fan components have been removed.

2. The pressure test and leakage test of the cooling water system have been completed.

3. The cooling water system has been cleaned and drained.

4. The cooling water system has been confirmed ready for operation.

5. The water supply-/drainage-pipe system of the humidification system has been reliably connected according to the

material requirements and been checked against leakage.6. The compressor heating-tape has been pre-heated for

more then 12hr.

7. Make sure the equipment room temperature is above 68°F with sufficient heat load. If the heat load is insufficient,

heat the equipment room with devices like oil heater, or by running other heat generating equipment first to make sure

the heat load is sufficient for the commissioning.

Electric part

1. Check that the voltage of the main power supply is within ±10% of the rating.

2. Check that the power or control circuits are reliably connected. Fasten all the connecting terminals.

3. The power cables and the control cables are laid away from each other.

4. Check the phase sequence. The phase sequences of all three-phase devices have been adjusted consistent before

delivery. During commissioning, you only need to ensure the phase sequence of a random three-phase device is

correct. In step 3 of 4.3.2 Commissioning Procedures, you can click on the fan contactor in the electric control box

with a straight screwdriver to judge the phase sequence by observing the wind direction. If the phase sequence is

wrong, exchange any two phases of the L line of the power supply.

4.3.2 Commissioning Procedures

1. Turn off the MCB of various parts. Turn on the main MCB and control MCBs. Check the control voltage.

2. Check that the motor pulley and fan pulley are well fixed. Check that the fan bearing and the motor are parallel, the

belt is perpendicular to the bearings, and the belt tension is proper.

3. Switch on the fan MCB and click on the contactor of the indoor fan with a screwdriver to confirm the rotation

direction of the fan. Start the system and measure all the phase currents of the fan.

4. Switch on the electric reheat MCB and change the temperature setting to start the electric reheat, or start the heater

manually. Measure all the phase currents of electric reheat.

To trigger the heater, you should:

Change the temperature setting (see 5.7 SERVICE MENUS) 41°F higher than the indoor temperature. The system

should then trigger the call for heating and the electric reheat starts to work. Then set the temperature setting lower

than the indoor temperature. If the electric reheat stops working, it means the heating function is normal.

� Note

After the test, restore the temperature setting to the default or the original setting.

5. Switch on the humidification MCB and change the humidity setting to start the humidifier, or start the humidifier

manually. Measure all the phase currents of the humidifier. Manually charge water into the cooling system to check

that the charge-/drainage-pipes do not leak and the drainage pipes are clear.

To trigger the humidifier, you should:

Adjust the humidity setting (see 5.7 SERVICE MENUS) to 10% higher than the indoor Relative Humidity (RH). The

control system should then trigger the call for humidification, and the humidifier starts to work. If the humidifier stops

working when the humidity setting is lower than the indoor RH, it means the humidifying function is normal.

� Note


6. The condensing temperature should be kept at 113°F.



Change the temperature setting to start cooling, or start cooling manually. Make sure the dehumidification and hot gas

bypass valve are closed. Measure in real time all the phase currents of the compressor.

Check the condensation subcooling degree, suction superheating and air bulbs of the sight glass to make sure the

compressor works normally, and add refrigerant if necessary.

To start cooling (start the compressor), you should:

Change the temperature setting (see 5.7 SERVICE MENUS) to 41°F lower than the indoor temperature. The control

system should then trigger the call for cooling, and the compressor starts to work. After at least 3min of cooling,

change the temperature setting to 41°F higher than the indoor temperature. If the compressor stops working then, it

means the cooling function is normal.

7. Check the dehumidification function

To trigger dehumidification, you should:

Change the humidify setting (see 5.7 SERVICE MENUS) to 10% lower than the indoor RH. The control system

should then trigger the call for dehumidification, the dehumidification solenoid valve switches on, and the

dehumidification indicator Q3 on the control panel turns on. Then change the humidity setting higher than the indoor

RH. If the dehumidification solenoid valve switches off, and the dehumidification indicator Q3 turns off, it means the

dehumidification function is normal. Note that during the commissioning process, if the indoor temperature is 37.4°F

higher than the temperature setting, the system may enter the forced cooling mode, and the dehumidification demand

will not be responded.

� Note


4.3.3 Commissioning Complete Inspection

1. Check that all output functions are automatic.

2. Check that the temperature & humidity settings and control precisions are set reasonable.

3. Make sure all the other functions are set reasonable.

Chapter 5 iCOM Controller 35


Chapter 5 iCOM Controller

The iCOM controller adopts menu operation. It can monitor, display and operate the precision cooling air conditioner

unit and control the environment temperature within a set temperature range.

This chapter introduces the menu operation of iCOM controller, control features and parameter settings.

5.1 LCD

An LCD is located on the front panel of the Liebert.PEX series air conditioner. The LCD can display the current state of

the equipment room, such as temperature and humidity. You can read and modify the parameter settings through the

LCD.

The LCD uses blue back lighting. If no button is pressed within a certain period of time (settable; by default: 5min), the

back lighting will be off, until the next time any button is pressed.

5.2 Button And Indicator Panel

Nine buttons and two indicators are located on the button and indicator panel, including:

� Buttons: up button, down button, left button, right button, enter button, exit button, ON/OFF button, alarm silence

button, help button.

� Indicators: alarm indicator, operation indicator.

The button and indicator panel is shown in Figure 5-1.

Alarm indicator

Alarm silence buttonLeft button Up button

Enter button

Right button

Downbutton

Helpbutton

Escape

button

ON/OFF button

Operation indicator

Figure 5-1 Buttons and indicators of controller

1. Alarm indicator

The alarm indicator is off during normal operation. It turns on in red only upon alarms.

2. Operation indicator

The operation indicator is on in green when the air conditioner is operating; or turns when air conditioner unit is shut

down, the operation indicator will be on in yellow.

3. ON/OFF button

Function one: switch on/off the system.

Press the ON/OFF button to shut down an operating system, or to start an idle system.

� Note

After the system is powered on, the system will assume the operation state before the power-off. For example, if the system is in

the work state when powered off, it will enter the work state automatically after power on.

Function two: test the operation indicator and the back lighting of the LCD.

After power-on, when the system is in the standby state (or test state as defined in this manual), pressing the ON/OFF

button will switch between the indicator (green then) and the LCD backlight. This function is used to test whether or not

the LCD backlight and the operation indicator is normal.

� Note

The settings of the system when the system is in the test state will not be written into the microprocessor.

36 Chapter 5 iCOM Controller


4. Enter button

Function one: enter the selected menu, or save the setting after parameters are changed. When you are entering a

menu or changing a parameter, the menu and the parameter will be high lighted.

Function two: test the display of characters.

When the system is in the test state, pressing the enter button will display the ASCII code. This function is used to test

whether or not the characters are displayed normally on the LCD.

5. Escape button

Function one: quit the current menu.

Function two: abolish the current change of parameter.

Function three: test the LCD high light.

Pressing the escape button to switch the LCD between light and high light when the system is in the test state. This

function can test whether or not the LCD high light is normal.

6. Up button

Function one: increase the value of the displayed parameter during parameter setting.

Function two: scroll a row or a screen up in the query state.

Function three: test the buzzer.

Pressing the up button when the system is in the test state will increase the buzzing frequency (initial value: 0%).

Meanwhile the buzzer will sound at the set frequency. This function is used to test whether or not the buzzer is normal.

7. Down button

Function one: decrease the value of the displayed parameter during parameter setting.

Function two: scroll a row or a screen down in the query state.

Function three: test the buzzer.

If the buzzer frequency is not 0%, pressing the down button when the system is in the test state will decrease the

buzzing frequency. Meanwhile the buzzer will sound at the set frequency. This function is used to test whether or not

the buzzer is normal.

8. Left button

Function one: select the left bit during the parameter setting operation.

Function two: test the LCD contrast.

Pressing the left button when the system is in the test state will decrease the LCD contrast (by default: 100%). This

function is used to test whether or not the LCD contrast is normal.

9. Right button

Function one: select the right bit during the parameter setting operation.

Function two: test the LCD contrast.

If the LCD contrast is not 100%, pressing the right button when the system is in the test state will increase the LCD

contrast. This function is used to test whether or not the LCD contrast is normal.

10. Alarm silence button

Function one: silence the alarm sound that is raised upon system alarms.

Function two: clear the current alarm after the alarm sound is silenced.

Function three: test the alarm indicator, and rest the LCD contrast and buzzer frequency.

Pressing the alarm silence button when the system is in the test state will switch the alarm indicator between on and

off. It can test whether or not the alarm indicator is normal. Meanwhile, the LCD contrast and buzzer frequency will be

reset to their defaults.

11. Help button

Function one: display the online help.

Function two: test the yellow display of the LCD operation indicator.

When the system is in the test state, pressing the help button will switch on and off the LCD operation indicator. This

function is used to test whether or not the yellow display of the LCD operation indicator is normal.

5.3 The Structure Chart Of Control Menu

Please refer to Appendix 3 Menu Structure Chart Of Microprocessor Controller.



5.4 Startup Interface

After the system is powered on, it is on the waiting state. The display screen will appear as shown in Figure 5-2.

Figure 5-2 Startup interface

5.5 Main Interface

Twenty s after the power on, the LCD will enter the main interface. The main interface provides the general information

about the status of relative equipment, including present temperature and humidity, temperature and humidity setting

value, equipment output status (fan, compressor, cooling, heating, dehumidifying, humidifying), alarm and

maintenance status. The main interface has two display modes: graphical and simple. The difference between the two

display modes is that the graphic interface (see Figure 5-3) displays the percentage output chart of the function

components and the simple interface (see Figure 5-4) only displays the icons of current operation mode. The switching

of two modes can be realized by operating the menu. Refer to 5.6.7 DISPLAY SETUP for detailed information.

The top left corner of main interface displays the current unit number; the top right corner displays the current system

status. If there is no button operation for 255s on other menu display screen, the LCD screen will display the main

interface.

UNIT 1 SYS ON

20℃ 42％32℃ 43％ RCT

Setting valuePresent value

Figure 5-3 Graphical mode of main interface

20℃ 42％32℃ 43％

100％

100％

0％

0％

0％

0％

0％

RCT

UNIT 1 SYS ONSetting valuePresent value

Figure 5-4 Simple mode of main interface

The detailed icon meanings of graphical mode and simple mode on main interface are listed in Table 5-1.

Table 5-1 Meanings of icons

Icon Meaning Icon Meaning

Fan running Natural cooling

Cooling Maintenance

Hot water heating Dehumidifying

Electrical heatinig

Humidifying

5.6 USER MENUS

Press the enter or down button on the main interface to enter the USER MENUS, as shown in Figure 5-5. The USER

MENUS are displayed in six pages, each of which displays one or two submenus. Press the enter button to highlight

the menu, the up or down button to browse the submenus, and the enter button to enter the selected one.



1 / 6USER MENUS

PASSWORD LEVEL

SETPOINTS

0

C / FH%R

SET

? ???

2 / 6USER MENUS

EVENT LOG

GRAPHICS

EVENTLOG

3 / 6USER MENUS

SET ALARMSALARMS

SET

4 / 6USER MENUS

SENSOR DATA

DISPLAY SETUPSET

5 / 6USER MENUS

TOTAL RUN HRS

SLEEP MOOE

6 / 6USER MENUS

SERUICE INFO

ALARMSACTIVE ALARMSACTIVE

Figure 5-5 User menu

5.6.1 PASSWORD

The password is necessary for some settings. After inputting the password (user password: 149), use the up button

and down button to browse all the options, and press the enter button to enter the submenu.

5.6.2 SETPOINTS

The setpoints are saved as permanent memory. You can enter to query and set parameters in the ‘SETPOINTS’

submenu through the USER MENUS. The left row displays the parameter codes; the middle row, the parameter name;

the right row, the settings, as shown in Table 5-2.

Table 5-2 Descriptions of SETPOINTS submenu parameters

Parameters Default Setting range Description

U102 TEMP SET 73°F 41°F ~ 104°F Temperature setpoint

U103 HUM SET 50% 1% ~ 80% Humidity setpoint

U104 HUM CTRL Pred Pred (predictive), comp

(compensable), rel (relative) Humidity control type

U105 SUP LIM Dsabl Dsabl, enabl Air temperature limit enable type

U106 SUP TEMP 59°F 41°F ~ 77°F Air temperature limit setting value

U107 BACK TSP 59°F 41°F ~ 104°F Backup temperature setpoints

If you want to modify the preceding settings, you should input the password before entering the submenu

‘SETPOINTS’. Then press the enter button to highlight the menu and use the up or down button to scroll the

parameters. Press the enter button to select one parameter, use the up or down button to set the value, and press the

enter button to save the change.

5.6.3 EVENT LOG

You can enter the EVENT LOG submenu without a password, as shown in Figure 5-6.

0EVENT LOG P

（01）1/31/2007 10 00

01

Warning

Power loss

:

Figure 5-6 EVENT LOG submenu

The EVENT LOG submenu saves the last 400 system records. The event types include message, warning and alarm.

When the event type is message, the LCD will display the event name only.

When the event type is warning, the LCD will display the event name and the alarm indicator will turn on in red.

When the event type is alarm, the LCD will display the event name, the alarm indicator will turn on in red, and an

audible alarm will be raised.



5.6.4 GRAPHICS

The GRAPHICS submenu provides two kinds of graphs: the RETURN TEMP and the RETURN HUMIDITY. These

graphs reflect the temperature and humidity changes over a period of time in the past.

In the graphs, the current temperature or humidity is the origin, the time is the horizontal axis, and the temperature or

humidity is the vertical axis, as shown in Figure 5-7.

RETURN TEMP 01+03

-03

27

10 40t 8d: :

°C

RETURN HUMIDITY 01

+20

-20

+55%

10 42t 8d: :

Figure 5-7 The graph of return temperature and return humidity

As the horizontal axis, the time range can be set into eight kinds. Each pixel indicates different time in different time

ranges. See Table 5-3 for the detailed time range.

Table 5-3 Time range

Time range Time indicated by each pixel Time range Time indicated by each pixel

8min 6s 2 days 36min

32min 24s 4 days 72min

1hr 45s 8 days 144min

12hr 9min 16 days 288min

24hr 18min

The scaling of the vertical axis can also be set. For the RETURN TEMP, the scaling range is ±3 ~ ±20; for the

RETURN HUMIDITY, the scaling range is ±10 ~ ±30. The bigger the scaling range is, the bigger the value each pixel

indicates will be, and the more centered the curves will be.

You can set the parameters without inputting the password. Press the enter button to highlight the parameters, use the

up or down button to select one parameter. Then press the enter button again to enter the parameter, and use the up

or down button to set the value. Press the enter button to save the change at last.

5.6.5 SET ALARMS

The SET ALARMS submenu is used to set the upper/lower limits of temperature/humidity alarms. The settings are

saved as permanent memory. You can select the ‘SET ALARMS’ to browse and set the parameters under he USER

MENUS. The parameters are listed in Table 5-4.

� Note

The system defaults are not recommended to be changed. If you consider it necessary to change the defaults, consult with

professionals first and set the alarm settings under the guidance of them.

Table 5-4 Parameters of SET ALARMS


U202 RTN SNSR Yes Yes, no Return air alarm enable

U203 HI TEMP 73°F 34°F ~ 210°F High return air temperature alarm setting value

U204 LO TEMP 65°F 34°F ~ 210°F Low return air temperature alarm setting value

U205 HI HUM 60% 1% ~ 99% High return air humidity alarm setting value

U206 LOW HUM 40% 1% ~ 99% Low return air humidity alarm setting value

U207 SENSOR A Yes Yes, no Sensor A alarm enable

U208 HI TEMPA 122°F 34°F ~ 210°F High temperature alarm setting value of sensor A

U209 LO TEMPA 77°F 34°F ~ 210°F Low temperature alarm setting value of sensor A

U210 HI HUM A 70% 1% ~ 99% High humidity alarm setting value of sensor A

U211 LO HUM A 30% 1% ~ 99% Low humidity alarm setting value of sensor A

To browse through the submenu, press the enter button to highlight the parameters, and use the up or down button to

scroll.



Password is required for changing the settings. Then, enter the ‘SET ALARMS’ submenu, press the enter button to

highlight the parameters, use the up or down button to select one parameter, and press the enter button to enter the

selected parameter. Use the up or down button to change the setting, and press the enter button to save the change,

or press the ESC button the quit the change.

5.6.6 SENSOR DATA

The SENSOR DATA submenu provides you with environmental data for the query. The values are for read only, no setting or change is allowed. See Table 5-5 for the menu description.

Table 5-5 Sensor data menu description

Sensor data Unit Description Sensor data Unit Description

U301 TEMP A °F Optional sensor A

temperature U313 Hi Temp °F Daily high temperature

U302 HUM A % Optional sensor A

humidity U314 Lo Te H h Daily low temperature (hour)

U303 TEMP B °F Temperature of sensor A U314 Lo Te M m Daily low temperature

(minute)

U304 HUM B % Humidity of sensor A U314 Lo Te S s Daily low temperature

(second)

U305 TEMP C °F Temperature of sensor B U314 Lo Temp °F Daily low temperature

U306 HUM C °F Humidity of sensor B U315 Hi Hu H h Daily high humidity (hour)

U307 FC TEMP °F Temperature of sensor C U315 Hi Hu M m Daily high humidity (minute)

U308 AMB TEMP % Humidity of sensor C U315 Hi Hu S s Daily high humidity (second)

U309 FC state - Freecooling status U315 Hi Humi % Daily high humidity

U310 DS1 TEMP °F Temperature of digital

scroll 1 U316 Lo Hu H h Daily low humidity (hour)

U311 DS2 TEMP °F Temperature of digital

scroll 2 U316 Lo Hu M m Daily low humidity (minute)

U313 Hi Te H hr Daily high temperature

(hour) U316 Lo Hu S s Daily low humidity (second)

U313 Hi Te M m Daily high temperature

(minute) U316 Lo Humi % Daily low humidity

U313 Hi Te S s Daily high temperature

(second)

5.6.7 DISPLAY SETUP

The DISPLAY SETUP submenu is used to set the LCD display attributes. Password is not required for changing the

settings. See Table 5-6 for the parameter description.

Table 5-6 DISPLAY SETUP parameter description


U401 LANGUAG EN

THA, JAP, CHI,

ESP, FRE, ITA,

DEU, EN

Language options

U402 YEAR 2005 - Current year

U402 MONTH 04 01 ~ 12 Current month

U402 DAY 19 01 ~ 31 Current day

U403 HOUR 19h - Current hour

U403 MINUTE 08min - Current minute

U403 SECOND 17s - Current sencond

U404 TEMP F/C °C °F, °C Temperature indication

U405 CONTRAST 50% 0% ~ 100% Display contract

U406 BUZ FREQ 50% 0% ~ 100% Buzzer frequency. 0% means buzzer silenced

U406 BUZ TEST Off On, off Buzzer frequency test switch. It determines whether or not there will

be sound accompanying the adjustment of BUZ FREQ

U407 BACKLITE 5min 5min, 10min,

30min, 1hr, 12hr

Back light time, or the back light time when there is no panel

operation

U408 SCREEN Graph Graph, simple Main window display mode




U409 SHOWS A + S SET, ACT, A + S

Main interface display mode of settings and actual values. Range:

� SET: only settings of temperature and humidity are displayed

� ACT: only actual temperature and humidity are display

� A + S: both settings and actual values of temperature and

humidity are displayed

U410 DISPLAY Norm Norm (normal),

inv Display mode

U411 DATE m/d/y m/d/y, d.m.y,

y-m-d Date format. Range

5.6.8 TOTAL RUN HRS

The TOTAL RUN HRS submenu records the total run time (Unit: hr) of system components. You can also set run time

limits of system components through this submenu. If the components actual run hour exceeds the set limit, alarms will

be raised.

This submenu requires password. The total run time can be reset to zero in order to restart timing.

� Note

There is no need to reset the timers unless the components are replaced.

The parameters on this submenu are described in Table 5-7. The ‘LIMIT’ under the component name is the run time

limit of the corresponding component.

Table 5-7 TOTAL RUN HRS parameter description

Parameters Default Related equipment Parameter Default Related equipment

U502 MOTOR(S) 0hr U507 EL HEAT1 0hr

U502 LIMIT 32000hr Fan motor

U507 LIMIT 32000hr Electric reheat 1

U503 COMP1 0hr U508 EL HEAT2 0hr

U503 LIMIT 32000hr Compressor 1


U504 COMP2 0hr U509 EL HEAT3 0hr

U504 LIMIT 32000hr Compressor 2


U505 CW/FC 0hr U510 HUM 0hr

U505 LIMIT 32000hr

Chilled water / free

cool U510 LIMIT 32000hr Humidifier

U506 HG / HW 0hr U511 DEHUM 0hr

U506 LIMIT 32000hr Hot Gas/ Hot water

U511 LIMIT 32000hr Dehumidification

5.6.9 SLEEP MODE

In the sleep mode, the air conditioner unit can realize auto-on/off. Through this submenu, you can set two time zones

of the sleep mode, and set the sleep timing-mode. See Table 5-8 for details.

Table 5-8 SLEEP MODE parameter description


U602 MON No

U602 TUE No

U602 WED No

U602 THU No

U602 FRI No

U602 SAT No

U602 SUN No

Yes, no

Sleep mode day, including Monday ~ Sunday. Set the value of any day

to Yes, and the system will enter sleep mode on that day every week.

This parameter works together with the following hour and minute

settings to designate an exact time

U605 START 1 0hr

U605 START 1 0m

Sleep mode starting time 1. The first parameter is used to set the hour

of time, and the second one is used to set the minute of time

U605 STOP 1 0hr

U605 STOP 1 0m

Sleep mode end time 1. The first parameter is used to set the hour of

time, and the second one is used to set the minute of time

U607 START 2 0hr

U607 START 2 0m

Sleep mode starting time 2. The first parameter is used to set the hour

of time, and the second one is used to set the minute of time

U607 STOP 2 0hr

U607 STOP 2 0m

-

Sleep mode end time 2. The first parameter is used to set the hour of

time, and the second one is used to set the minute of time




U609 TIME MOD Yes Auto, yes, no

Auto: during the system sleep time, if high/low temperature occurs, the

system will resume operation and mask the screen for 15min. The

system will re-enter sleep mode after the alarm is cleared

Yes: start sleep mode

No: no sleep mode

U610 TIME TYP S.OFF S.OFF, DEADB Timing mode selection

U611 DEADBAND k 2k ~ 15k Used to set the dead band temperature setting range

5.6.10 SERVICE INFO

The SERVICE INFO submenu provides the contact information of customer service personnel. You can contact the

service personnel with this information, which is read only.

5.6.11 ACTIVE ALARMS

The ACTIVE ALARMS submenu displays the active alarms of the system. No password is required to query this menu.

5.7 SERVICE MENUS

Press the right button at the first window of the USER MENU and you will enter the SERVICE MENUS.

The SERVICE MENUS are displayed in five pages. Each page displays one submenu or two submenus, as shown in

Figure 5-8. Press the Enter button to highlight the submenus, and use the up button and down button to scroll. Press

the Enter button to enter the highlighted submenu.

SERVICE MENUS 1 / 5

PASSWORD LEVEL

SETPOINTS

0 ? ???

C / FH%R

SET

SERVICE MENUS

STANDBY

WELLNESS

2 / 5

WELLNESS

SERVICE MENUS

DIAGNOSTICS

SET ALARMS

SERVICE

ALARMS

SET

3 / 5

4 / 5

CALIERATION

NETWORK SETUPNETWORK

SERVICE MENUS 5 / 5

OPTIONS SETUP

SERVICE INFO

SETUP

SERVICE MENUS

Figure 5-8 SERVICE MENUS

5.7.1 PASSWORD LEVEL

See 5.6.1 PASSWORD.

5.7.2 SETPOINTS

Different from the SETPOINTS in the USER MENUS, the SETPOINTS in SERVICE MENUS has many more

parameters. See Table 5-9 for the parameter descriptions.

Table 5-9 SETPOINTS parameter description


S102 TEMP SET 66°F 41°F ~ 104°F Temperature setpoint

S103 CTRL TYPE PI Prop, PI, PID, intel Control type selection

S104 TEMP PB 7k 1k ~ 30k Temperature proportional band, or the P in PID control

S105 TEMP INT min - Temperature integration time, or the I in PID control

S106 TEMP DER s - Temperature derivative time, or the D in PID control

S107 AUTOSET Yes Yes, no Autoset enable

S108 TEMP DB 32°F 32°F ~ 68°F Temperature deadband setting range

S109 2ND SETP 73°F 41°F ~ 104°F -




S110 BACK TSP 73°F 41°F ~ 104°F Backup temperature setpoint

S113 HUM SET 50% 1% ~ 80% Humidity setpoint

S114 HUM CTRL Pred Pred, Comp, Rel Humidity control type

S115 HUM PB 10% 1% ~ 20% Humidity proportional band

S116 HUM INT 5min - Humidity integration time

S117 HUM DB 0% 0% ~ 50% Humidity deadband setting range

S118 LO LIM 1 k - -

S119 LO LIM 2 -1.7k -5.5k ~ -1.1k -

S124 SUP LIM Yes Yes, no Supply limit

S125 SUP TEMP °F 41°F ~ 77°F Supply limit temperature value

S126 AMB TYPE No No, CONT, EFC, DIFF DT type selection

S127 AMB DT k 0 ~ 20k DT setting range

S128 FC TYPE No No, CONT, DIFF Natual cooling control type selection

S129 FC DT k - -

S130 MIN CW No Yes, no Minimum CW temperature protection selection

S131 MIN CW °F - Minimum CW temperature value

S135 FANSPEED - - VSD fanspeed

S136 VSD SET % - VSD setpoint STD

S137 VSD MIN % - VSD setpoint MIN

S138 VSD DEH % - VSD setpoint dehum

S139 VSD NOP % - VSD setpoint no power

S146 SCRTYPE - - SCR control type

S147 CO1 ON % - Start compressor 1 at

S148 CO1 OFF % - Stop compressor 1 at

S149 CO1 TD min - Compressor 1 stop delay

S150 CO2 ON % - Start compressor 2 at

S151 CO2 OFF % - Stop compressor 2 at

S152 CO2 TD min - Compressor 2 stop delay

S153 CYCLET s - Cycle time

S154 SCRFACT - - SCR factor

S155 ACT SCR % - Actual SCR request

5.7.3 STANDBY

The parameters of the STANDBY submenu are described in Table 5-10.

Table 5-10 STANDBY parameters description


S502 #STANDBY 1 0 ~ 32 Number of standby units

S503 ROTATION Daily

Daily, MON ~

SUN, M -

MON ~ M -

SUN

Rotation frequency. Range:

� Daily: rotate once a day.

� MON ~ SUN: rotate once a week. The rotation occurs on Monday ~

Sunday of the week. For example, MON means rotation occurs on

Monday of every week.

� M - MON ~ M - SUN: rotate once a month. The rotation occurs on

Monday ~ Sunday of the first week of the month. For example, M –

MON means rotation occurs on Monday of the first week of every month

S504 ROT HOUR hr - Used to set hour of the detailed time while rotation

S505 ROT MIN min - Used to set minute of the detailed time while rotation

S506 ROT BY 1 1 ~ 8 The unit number for rotation

S507 DO ROT No Yes, no Perform one rotation

S508 CASCADE No CO/HE, yes,

no

Cascade selection. The ‘Yes’ correspond to temperature and humidity control

and ‘no’ corresponds to closing the cascade

S509 STBY HT No Yes, no Start all standby units by HT



5.7.4 WELLNESS

The controller calculates the bonus and penalty over the equipment maintenance based on the parameters in the

WELLNESS submenu and the equipment operation log, so as to find out the next system maintenance time.

Informing the maintenance personnel of the maintenance time makes the system run in the optimal mode, which

reduces the chances of faults and raises the system reliability.

The WELLNESS submenu includes nine groups of parameters, including the WELL BASICs and WELLNESS COMPs.

See Table 5-11 ~ Table 5-19 for details.

WELLNESS BASIC1

Table 5-11 WELLNESS BASIC1 parameter description


S002 FREQ/YR 1pY 0pY ~ 12pY Maintenance frequency every year

S003 BONUS 0MM 0MM ~ 12MM Bonus setting

S004 PENALTY 0MM 0MM ~ 12MM Penalty setting

S005 LAST PM YY

S005 LAST PM MM

S005 LAST PM DD

- Last maintenance. YY.MM.DD. This parameter is read only

WELLNESS BASIC2

Table 5-12 WELLNESS BASIC2 parameter description


S006 NAME - - Service engineer

S007 CONFIRM No Yes, no Confirm

S008 NEXT PM - - Calculated next maintenance. This parameter is read only

WELLNESS MOTOR

Table 5-13 WELLNESS MOTOR parameter description

Parameters Default Description

S013 STARTS - Number of fan starts since the last maintenance

S014 RUN HRS hr Fan run hours since the last maintenance

S015 AVG RUN m Average fan run time calculated through number of fan starts and run hours

S016 BEST 1 Starts per day best

S017 WORST 24 Starts per day worst

S018 ALARMS 0 Number of alarms since the last maintenance

S019 BONUS 0MM Actual bonus calculated through the number of starts and average run time. This value

determines the time for the next maintenance

WELLNESS COMP1

Table 5-14 WELLNESS COMP1 parameter description


S024 STARTS - Number of compressor 1 starts since the last maintenance

S025 RUN HRS hr Compressor 1 run hours since the last maintenance

S026 AVG RUN m Average compressor 1 run time calculated through the number of starts and run hours



S029 HP AL 0 Number of high pressure alarms occurred to compressor 1 since the last maintenance

S030 LP AL 0 Number of low pressure alarms occurred to compressor 1 since the last maintenance

S031 OL AL 0 Number of overload alarms occurred to compressor 1 since the last maintenance

S032 DS HT AL 0 Number of digital scroll high temperature alarms occurred to compressor 1 since the last

maintenance





WELLNESS COMP2

Table 5-15 WELLNESS COMP2 parameter description


S035 STARTS - Number of compressor 2 starts since the last maintenance

S036 RUN HRS hr Compressor 2 run hours since the last maintenance

S037 AVG RUN m Average compressor 2 run time calculated through the number of starts and run hours



S040 HP AL 0 Number of high pressure alarms occurred to compressor 2 since the last maintenance

S041 LP AL 0 Number of low pressure alarms occurred to compressor 2 since the last maintenance

S042 OL AL 0 Number of overload alarms occurred to compressor 2 since the last maintenance

S043 DS HT AL 0 Number of digital scroll high temperature alarms occurred to compressor 2 since the last

maintenance



WELLNESS HEAT1

Table 5-16 WELLNESS HEAT1 parameter description


S046 STARTS - Number of electric reheat 1 starts since the last maintenance

S047 RUN HRS hr Electric reheat 1 run hours since the last maintenance

S048 AVG RUN m Average electric reheat 1 run time calculated through the number of starts and run hours



S051 ALARMS 0 Number of high pressure alarms since the last maintenance



WELLNESS HEAT2











WELLNESS HEAT3













WELLNESS HUM

Table 5-19 WELLNESS HUM parameter description


S079 STARTS - Number of humidifier starts since the last maintenance

S080 RUN HRS hr Humidifier run hours since the last maintenance

S081 AVG RUN m Average humidifier run time calculated through the number of starts and run hours






5.7.5 DIAGNOSTICS

The DIAGNOSTICS submenu is classified into two groups. After entering the menu, pressing the up button and down

button can switch between two groups and pressing the enter button can enter into the options of each group. Some

parameters of DIAGNOSTICS submenu are settable and used to help the maintenance personnel to start and cut off

devices by hand on site, realizing the diagnosis for devices. The other ones are only readable and they can only reflect

the fault condition of the devices. See Table 5-20 for details.

Table 5-20 DIAGNOSTICS submenu


S302 HP1 CODE 0 HP 1 alarm counter. This parameter can be reset to 0

S303 HP2 CODE 0 HP 2 alarm counter. This parameter can be reset to 0

S304 HT1 CNT 0 HT 1 Alarm counter. This parameter can be reset to 0

S305 HT2 CNT 0 HT 2 Alarm counter. This parameter can be reset to 0

S306 LP1 CODE 0 LP 1 alarm counter. This parameter can be reset to 0

S307 LP2 CODE 0 LP 2 alarm counter. This parameter can be reset to 0

S308 LP1 ACT br Actual LP 1

S308 COMP2 Off Manual on/off control of compressor 2. Range: On, Off. Note that the On setting of this

parameter can start compressor 1 only when the fan has been started

S309 LP2 ACT br Actual LP 2

S310 HP1 ACT br Actual HP 1

S311 HP2 ACT br Actual HP 2

S313 MANUAL No Manual equipment on/off control. Range: Yes, No

S314 MOTOR(S) On Manual on/off control of the fan motor. Range: On, Off

S315 COMP1 Off Manual on/off control of compressor 1. Range: On, Off. Note that the On setting of this

parameter can start compressor 1 only when the fan has been started

S315 C1 MODE Run Compressor 1 mode. Range: Run, Evac (evacuate), Charg (charge)

S316 C1 CAP Off Refrigeration capacity of digital scroll compressor 1

S317 C1 CYCLE 0% Cycle of digital scroll compressor 1

S318 LLSV 1 Off Diagnostic of liquid line solenoid valve of compressor 1. Range: On, Off

S319 C2 MODE Run Compressor 2 mode. Range: Run, Evac, Charg

S320 C2 CAP Off Refrigeration capacity of digital scroll compressor 2

S321 C2 CYCLE % Cycle of digital scroll compressor 2

S322 LLSV2 Off Diagnostic of liquid line solenoid valve of compressor 2. Range: On, Off

S324 EL HEAT1 Off Diagnostic of electric reheat 1. Range: On, Off. The On setting of this parameter can

start electric reheat 1 only when the air loss is normal





S327 DEHUM Off Dehumidification. Range: On, Off

S328 LWD Val - -

S329 HUM FILL Off Diagnostic of solenoid valve of water supply to the humidifier. Range: On, Off

S330 HUM Off Diagnostic of humidifier. Range: On, Off. The On setting of this parameter can start

electric reheat 1 only when the air loss is normal

S331 H DRAIN - -

S332 HUM.C. 0.00A Electric current of humidifier




S334 LSI - -

S335 ALM REL Off Diganostic of alarm relay. Range: On, Off

S336 FC REL Off Diganostic of free cooling relay. Range: On, Off

S337 3P OPEN Off

S338 3P CLOSE Off Diganostic of 3-phase electric regulator. Range: On, Off

S340 BV CTRL

S341 ANALOG1 0%

S342 ANALOG2 0%

S343 ANALOG3 0%

S344 ANALOG4 0%

Diagnostic of analog output 1 ~ 4. They can be set to be percentage of desired output

S345 RSD On Remote shut down. Range: On, Off

S346 AIR LOSS OK Air loss alarm. OK means the system is normal. ACT means the air loss is active, and

abnormity occured

S347 MOTOR OL OK Fan motor overload alarm. OK means the fan is normal. ACT means the fan is

overloaded, and abnromality occurred

S348 FILTER OK Filter clogging situation. OK means normal; ACT means the filter is clogged

S349 CUSTOM1 OK

S350 CUSTOM2 OK

S351 CUSTOM3 Ok

S352 CUSTOM4 OK

States of customized alarms 1~ 4. OK means normal; ACT means the alarm is active,

and abnromality occured

S353 HEAT SAF - -

S354 FLOW AT % -

S355 FLOW ACT % -

S356 HP1 OK State of high pressure switch 1. OK means normal. ACT means abnormal

S357 LP1 OK State of low pressure switch 1. OK means normal. ACT means abnormal

S358 C1 OL OK Overload state of compressor 1. OK means normal. ACT means abnormal

S359 HP2 OK State of high pressure switch 2. OK means normal. ACT means abnormal

S360 LP2 OK State of low pressure switch 2. OK means normal. ACT means abnormal

S361 C2 OL OK Overload state of compressor 2. OK means normal. ACT means abnormal

S367 HUM PROB OK Humididifer fault state. OK means normal. ACT means abnormal

S368 DT1 Off -

S369 DT2 Off -

S370 DT3 Off -

S371 MIN CW Off -

5.7.6 SET ALARMS

The SET ALARMS menu is displayed in nine pages. The first page provides settings of alarm upper/lower limits and

customized alarms. The other eight pages provide the settings of alarm delay.

Setting alarm upper/lower limits

The alarm limits in the SERVICE MENUS are set the same as those in the USER MENUS. For details, see 5.6.5

SET ALARMS.

Setting customized alarms

See Table 5-21 for the setting of customized alarms.

Table 5-21 Setting customized alarms

Parameters Default Parameters Default

S202 RTN SNSR Yes S213 CUST IN1 WATER

S203 HI TEMP °F S214 C1 ACT CLOSE

S204 LO TEMP °F S215 CUST IN2 WATER

S205 HI HUM 60% S216 C2 ACT CLOSE

S206 LOW HUM 40% S217 CUST IN3 WATER

S207 SENSOR A Yes S218 C3 ACT CLOSE

S208 HI TEMP A °F S219 CUST IN4 HEAT A

S209 LO TEMP A °F S220 C4 ACT OPEN

S210 HI HUM A % S221 WA AC AL No

S211 LO HUM A %

S222 AL RES No



CUST IN1, CUST IN2, CUST IN3 and CUST IN4 can be set to 21 types of input. See Table 5-22 for details.

Table 5-22 Customer input types

Types Description Types Description Types Description

SMOKE Smoke alarm HUM Humidifier lockout En FC Enable FC

WATER Water alarm RH＋HU Rht + Hum lockout RJVFD HTRJ VFD

C PMP Cooling pump alarm COMP Compressor lockout RJTVS HTRJ TVSS

FLOW Insufficient water alarm Call Call service Fire Fire Alarm

G PMP Standby pump alarm Temp High temperature alarm 2.Set 2nd Setpoint

STBY Standby unit alarm Air Air loss NoP No Power

C-In1 Customized alarm 1 FC L. FC lockout LSI LSI

C-In2 Customized alarm 2 HeatA Heater alarm Cnd1 Cond 1 Fail

C-In3 Customized alarm 3 FLOSD Flow AL SD Cnd2 Cond 2 Fail

C-In4 Customized alarm 4 FLOLC Flow AL LC

RHT Reheater lockout

ComPD Comp Lock PD

C1 ACT, C2 ACT, C3 ACT and C4 ACT correspond to the customer alarms. OPEN means normally open, CLOSE

means normally closed.

Setting alarm delays

The alarm delays are the time after faults occur and before the alarms are triggered. See Figure 5-9 for the menu

format.

2 / 9

S225S226S227S228S229S230

FOLLOACFHRTLRTHRH

DEL EN T532

303030

YesYesYesYesYesYes

ALMALMWRNWRN

WRNWRN

01SET ALARMS

Figure 5-9 Alarm delay

The alarm name, delay time, delay enabling and alarm type are displayed from left to right in the list.

The alarm delay can be set to 0 ~ 9999. Unit: second.

The delay enabling determines whether or not the delay will be valid. Options include yes and no.

The alarm type can be set to ALM (alarm), WRN (warning) and MSG (message). They determine the alarm degree of

the corresponding event.

The alarm names are listed in Table 5-23.

Table 5-23 Alarm description

SN Alarm/event

name Description SN

Alarm/event

name Description

S225 FOL Fan overload S253 WUF Water under floor

S226 LOA Loss of airflow S254 CPH Conderser pump high water

S227 CF Filter clogged S255 LOF Loss of flow

S228 HRT High room temp. S256 SGP Standby glycol pump on

S229 LRT Low room temp. S257 STB Standby unit on

S230 HRH High room hum. S258 HUP Humidifier problem

S231 LRH Low room hum. S259 NOC No connection w/Unit1

S232 HTA High temperature sensor A S260 - Unit X disconnected

S233 LTA Low temperature sensor A S261 LOP Loss of power

S234 HHA High humidity sensor A S264 CI1 Customer input 1

S235 LHA Low humidity sensor A S265 CI2 Customer input 2

S238 OL1 Compressor 1 overload S266 CI3 Customer input 3

S239 OL2 Compressor 2 overload S267 CI4 Customer input 4

S240 HP1 Compressor 1 high pressure S268 CS Call service

S241 HP2 Compressor 2 high pressure S269 HTD High temperature

S242 LP1 Compressor 1 low pressure S270 LB1 Loss of air blower 2

S243 LP2 Compressor 2 low pressure S271 RL Reheat lockout

S244 PD1 Compressor 1 pumpdown fail S272 HL Humidifier lockout

S245 PD2 Compressor 2 pumpdown fail

S273 FCL FC lockout



SN Alarm/event

name Description SN

Alarm/event

name Description

S246 HT1 Digital scroll 1 high temperature S274 CL Compressor(s) lockout

S247 HT2 Digital scroll 2 high temperature S277 SC1 -

S248 EHO EL heat high temperature S278 SC2 -

S251 WHE Working hours exceeded S279 NOP -

S252 SMO Smoke detected S280 CN1 -

5.7.7 CALIBRATION

The CALIBRATION submenu can calibrate sensors by setting offsets. The parameters are listed in Table 5-24. The

parameters are in pairs: the former is the calibrated value, the latter is the calculated value, or the sum of the

measured value and the calibrated value. This value is engaged in the calculation of control need.

Table 5-24 CALIBRATION parameter description


S602 RTN TEMP K Calibrated return temperature. It can be set as a negative value. Use the up/down button

the change the setting, 0.01K at each step

S603 CAL TEMP 75.6°F Sum of calibrated value and measured return temperature. This value is compared with

the setting as the system actual temperature and is engaged in the calculation

S604 RTN HUM +0.0% Calibrated return humidity. It can be set as a negative value. Use the up/down button the

change the setting, 1% at each step

S605 CAL HUM 39.5% Sum of calibrated value and measured return humidity. This value is compared with the

setting as the system actual humidity and is engaged in the calculation

S606 DS1 NTC +0.0K Calibrated digital scroll 1NTC. It can be set as a negative or positive value. Use the

up/down button the change the setting, 0.1K at each step

S607 CAL DS1 84°F Sum of calibrated value and return humidity measured by digital scroll 1NTC sensor. This

value is engaged in the calculation

S608 DS2 NTC +0.0K Calibrated digital scroll 2NTC. It can be set as a negative or positive value. Use the

up/down button the change the setting, 0.1K at each step

S609 CAL DS2 84°F Sum of calibrated value and return humidity measured by digital scroll 2NTC sensor. This

value is engaged in the calculation

S613 TEMP A +0.0K Calibrated value of temperature sensor A

S614 CAL A °F Calculated value corresponding to temperature sensor A

S615 HUM A +0.0% Calibrated value of humidity sensor A

S616 CAL A % Calculated value corresponding to humidity sensor A

S617 TEMP B +0.0K Calibrated value of temperature sensor B

S618 CAL B °F Calculated value corresponding to temperature sensor B

S619 HUM B +0.0% Calibrated value of humidity sensor B

S620 CAL B % Calculated value corresponding to humidity sensor B

S624 FC SNSR - Free cooling temperature sensor. PTC or NTC sensor can be configured according to the

actual configuration

S625 FC SNSR °F Calibrated value of free cooling temperature sensor

S626 CAL FC °F Calculated value of free cooling temperature sensor

S627 SUP SNSR NTC Air supply temperature sensor. PTC or NTC sensor can be configured

S628 SUP TEMP +0K Calibrated value of air supply temperature sensor

S629 CAL SUP °F Calculated value of air supply temperature sensor

S630 TEMP C +0K Calibrated value of temperature sensor C

S631 CAL C °F Calculated value of temperature sensor C

S632 HUM C +0.0% Calibrated value of humidity sensor C

S633 CAL C % Calculated value of humidity sensor C



5.7.8 NETWORK SETUP

The NETWORK SETUP submenu is used to set the parameters when the system is in a network subject to the

monitoring of a host. See Table 5-25 for parameter description.

Table 5-25 NETWORK SETUP parameter description


S802 #UNITS 1 Range: 1 ~ 32

S803 TEAMWORK No Range: No, 1, 2

S824 MON ADD 3 Monitoring address of the system. Range: 1 ~ 99

S831 CS CTRL No Save the parameter set through MON ADD to the microprocessor. Range: Save, Load, No

S831 CS STAT Chang Indication of the saving state of the parameter set through MON ADD. “Chang” means the

parameter is changed but not saved, “Valid” means the setting is valid and saved

S832 NW CTRL No Save the parameter set through U2U GRP to the microprocessor. Range: Save, Load, No

S832 NW STAT Valid Indication of the saving state of the parameter set through U2U GRP. “Chang” means the

parameter is changed but not saved, “Valid” means the setting is valid and saved

S835 MON PROT Vlcty Set host monitoring protocol. Range: Vlcty (Velocity uses intelligent card), HN (Hironet), IGM

(ECA2), No

S836 IP #1 192

S836 IP #2 168

S836 IP #3 254

S836 IP #4 1

Set IP address

S837 NM #1 255

S837 NM #2 255

S837 NM #3 255

S837 NM #4 0

Set subnet mask

S838 GW #1 0

S838 GW #2 0

S838 GW #3 0

S838 GW #4 0

Set gateway address

S840 U2U PROT GBP -

S841 U2U ADD 1 Group address of this unit

S842 U2U GRP 1 -

S843 BL CTRL No

Boot program variant load. Saving the change of S835 ~ S841 needs the S + R command of

this parameter. The system will reset after the saving, and configure according to the new

parameters

S843 BL STAT Valid Indication of whether or not the parameters set through S835 ~ S841 are saved. “Chang”

means the parameter is changed but not saved, “Valid” means the setting is valid and saved

S844 SR CTRL No

Static RAM data reset control. If the change of S835 ~ S841 are not saved, using the C + R

command in this parameter can restore S835 ~ S841 to their original settings, and the

system will reset afterwards

S844 SR STAT Valid STD

SW# - Version No. of the control software

MAC 00 : 00 : 68 :

19 : 31 : 70 MAC address of the network card of this controller

NAME UNIT Name of the system. By default: UNIT. You can change the name as you need



5.7.9 OPTIONS SETUP

The OPTIONS SETUP submenu is used to set the parameters according to the equipment-specific demands. See

Table 5-26 for details.

Table 5-26 OPTIONS SETUP parameter description


S402 COMP SEQ Auto Compressor sequence. Range: Auto, 1 (compressor 1 being the primary one), 2 (compressor

2 being the primary one)

S403 LP DELAY m Low pressure alarm delay

S404 LP1 br -

S405 LP2 br -

S406 EL HEAT 1 Slectric heating stages. Range: 0 ~ 3

S407 HW HEAT No Hot water heat on/off. Range: Yes, No

S408 ALL HEAT 3 Total heat stages. Range: 0 ~ 3

S409 LWDconn No LWD connected. Range: Yes (water low sensor connected), No (water low sensor not

connected)

S410 3P RUN 165s 3P actuator runtime

S411 3P DIR DIR 3P actuator direction. Range: DIR, REV

S413 HUM ENAB Yes Humidification enabled. Range: Yes, No

S414 IR FLUSH 150% Infrared flush rate

S415 HUMSTEAM % Humidifier steam rate

S416 HUM.TIME S Humdifidifier bottle flush time

S417 HUM.MAN Humidifier bottle manual flush. Range: Yes, No

S418 DEHUM EN Yes Dehumidification enabled. Range:

S419 REST EN Yes Auto restart enabled. Range: Yes, No

S420 RESTART s Single unit auto restart

S421 ONOFF EN Yes On-off enabled. Range: Yes, No

S424 CW FLUSH hr Cooling water auto flush time

S425 FC FLUSH 0hr Free cooling auto flush time

S426 HT FLUSH 0hr Hot water auto flush time

S427 BALL OFF +0.0br -

5.7.10 SERVICE INFO

The SERVICE INFO provides the contact information of maintenance personnel. The maintenance personnel can

input and save their contact information through this submenu.

5.8 ADVANCED MENUS

The ADVANCED MENUS include PASSWORD LEVEL, FACTORY SETUP and PASSWORDS, as shown in Figure

5-10.

ADVANCED MENUS1 / 2

PASSWORD LEVEL

FACTORV SETUP

3 ? ???

SET

PASSWORDS

2 / 2

ACCESS

ADVANCED MENUS

Figure 5-10 ADVANCED MENUS

5.8.1 PASSWORD LEVEL

See 5.6.1 PASSWORD.

5.8.2 FACTORY SETUP

The FACTORY SETUP submenu is displayed in nine pages. The specific parameter description is shown from Table

5-27 to Table 5-36.



Unit code related settings

Table 5-27 Unit code related parameters

Factory 1/9 Default Description

A003 UC 01 0

… … …

A003 UC 06 0

A005 UC 07 0

… … …

A005 UC 12 0

A007 UC 13 0

… … …

A007 UC 18 0

Unit code setting. The code has 18 bits. Each bit can be set as 0 ~ 20

A008 UC CTRL No

Unit code control. Range:

Save: after UC01 ~ UC18 are changed, the changed can be saved through the save

command

Load: load parameters to the unit code directly

Compare: compare the present parameters and the parameters to be loaded

No: All change are cancelled. Keep the old parameters

A009 UC STAT Valid

Unit code status. Range:

Not available: parameters set through UC01 ~ UC18 are unavailable

Invalid: parameters set through UC01 ~ UC18 are invalid

OK: parameters set through UC01 ~ UC18 are effective

Changed: parameters UC01 ~ UC18 are changed, but not saved

Updating: parameters are updating

A010 EL CTRL No Exception list control. External data can be loaded through the load command

A011 EL STAT Not A

Exception list status. Range:

Not available: parameters set through UC01 ~ UC18 are unavailable

Invalid: parameters set through UC01 ~ UC18 are invalid

OK: parameters set through UC01 ~ UC18 are effective

Changed: parameters UC01 ~ UC18 are changed, but not saved

Updating: parameters are updating

System related settings

Table 5-28 System related settings


A102 REFRIG R22 Refrigerant type. Range: R407C, R22

A103 MOTOR OL SHUTD

Main fan overload, or the action to take after the fan overload. Range: SHUTD (fan shuts

down), DISAB (shut down humidifier, dehumidifier and heater, only keep the cooling unit

running)

A104 AIR LOSS SHUTD

Loss of airflow, or the action to take after the loss of airflow. Range: SHUTD (fan shuts

down), DISAB (shut down humidifier, dehumidifier and heater, only keep the cooling unit

running)

A105 # COMP 0 Number of compressors. Range: 0 ~ 2

A106 COMP DLY s Compressor delay time. Unit: second

A107 COMP ON m Compressor minimum on time. Unit: minute

A108 COMP OFF 3m Compressor minimum off time. Unit: minute

A109 PUMPDOWN Yes Pump down. Range: Yes, No

A110 CAP TYPE No Capacity control type. Range: No, 4step, HGBP (hot gas bypass), DS (digital scroll), DS

+ TH (temperature switch), SC HGBP

A111 FLOCT s Loss of flow compressor timer. Range: 0 ~ 180s

Other settings

Table 5-29 Other settings


A113 DS CYCLE s Digital scroll cycle

A114 DS HT °F Digital scroll high temperature

A115 DS SWB °F Digital scroll switchback

A116 LP TYPE ANLOG Low pressure device type. Range: analog, digital




A117 LP PH1 ps Low pressure threshold phase 1

A118 LP PH2 ps Low pressure threshold phase

A119 LC PRE 0.0s Liquid control pre-time

A120 LC POST 0.0s Liquid control post-time

LP sensor related settings

Table 5-30 LP sensor related settings


A124 LP1 LOW % LP1 sensor lower threshold (percentage)

A124 LP1 LOW br LP1 sensor lower shreshold

A125 LP1 HIGH % HP1 sensor lower shreshold (percentage)

A125 LP1 HIGH br HP1 sensor lower shreshold

A126 LP1 ACT % Actual LP1 signal. Read only

A127 LP2 LOW % LP2 sensor lower threshold (percentage)

A127 LP2 LOW br LP2 sensor lower threshold

A128 LP2 HIGH % HP2 sensor lower shreshold (percentage)

A128 LP2 HIGH ps HP2 sensor lower shreshold

A129 LP2 ACT % Actual LP2 signal. Read only

A130 PD CUT br Pumpdown cutout

A131 PD RECYC br Pumpdown recycle

A132 HEAT REJ W/G

Heat rejection control. Range:

FSC: fan speed control

L-T: Lee-Temp

W/G: water/glycol cooling

Free-cooling, HG and HW related settings

Table 5-31 Free-cooling, HG and HW related settings


A136 C/W F DUR 3m Cooling water flush duration

A137 COOL TYP SINGL Cooling type. Range: single source, freecooling, dual cooling

A138 STOP FC+ °F Stop FC at setpoint + / value

A139 FC F DUR 0m Freecooling flush duration

A140 FC F R5 Yes Freecooling flush starts R5. Range: Yes, No

A141 COMP + FC Yes Compressor plus FC simultaneously. Range: Yes, No

A142 HW F DUR 0m Hot water flush duration. Range: 0 ~ 3m

A143 HG HEAT No Hot gas heat. Range: Yes, No

A144 HEAT OP STAGE Electric reheat operation. Range: delaye, stage

Humidification/dehumidificatoin related settings

Table 5-32 Humidification/dehumidificatoin related settings


A146 HUM TYPE IFS Humidifier model. Range: External, IFS, IFL, PEX6, PEX9, PEX12, 21LLA, 53LLC,

53HLB, 93LLE, 93HLD, d3H, HT2, HT5, HT9

A147 HUM VOLT V Humidifier voltage

A148 HUM LAST 15hr Humidifier in last XXX hr. Unit: hr

A149 PREFILL 30s or 57s Prefill time. Unit: second

A150 FILL 57s Fill time. Unit: second

A151 HUM ON 584s Humidifier on time. Unit: second

A152 DEH COMP 1 Dehumidification with compressor. Range: 1, 2, both



Table 5-33 Analog output menu


A157 ANOUT1LO 0%

A157 ANOUT1HI 100%

A158 ANOUT2LO 0%

A158 ANOUT2HI 100%

A159 ANOUT3LO 0%

A159 ANOUT3HI 100%

A160 ANOUT4LO 0%

A160 ANOUT4HI 100%

A161 FS HE/HU 100%

-

A163 ANOUT1 HW175

A164 ANOUT2 COOL

A165 ANOUT3 COOL

A166 ANOUT4 HEAT

Analog output selection. See Table 5-36

Table 5-34 Analog state setting


A168 AO1 STA 0% Analog output 1 start point. Range: 0% ~ 100%

A168 AO1 STA 0.0V Analog output 1 start point. Range: 0 ~ 10V

A169 AO1 END 100% Analog output 1 end point. Range: 0% ~ 100%

A169 AO1 END 10.0V Analog output 1 end point. Range: 0 ~ 10V













Table 5-35 LL settings


A179 LL1 LOW %

A179 LL1 LOW br

A180 LL1 HIGH %

A180 LL1 HIGH br

A181 LL1 ACT %

A182 LL1 ACT br

A183 LL2 LOW %

A183 LL2 LOW br

A184 LL2 HIGH %

A184 LL2 HIGH br

A185 LL2 ACT %

A186 LL2 ACT br

Table 5-36 Analog output options description

Options Description Options Description

3PACT 3P valve CV175 CW/FC 1.75

HW Hot water COOL1 Cooling 1

HW175 Hot water 1.75 COOL2 Cooling 2

VSD Speed regulating device HEAT Heating

COOL Cooling

No No

Chapter 6 Application Of INTELLISLOT 55


Chapter 6 Application Of INTELLISLOT

This chapter introduces the application of the host communication component INTELLISLOT, including the

introduction, installation and commissioning of the host communication card.

6.1 Introduction Of Host Communication

The Liebert.PEX series air conditioner supports two communication cards below:

1. TCP/IP communication card

The TCP/IP communication card is shown in Figure 6-1. This card can provide network port, MIB library and can

browse the data through IE.

调试口

网口

Console port

Network port

Figure 6-1 TCP/IP communication card

2. 485 communication card

The 485 communication card is shown in Figure 6-2. This card can provide the Modbus protocol of the RS485 port to

the host.

调试口

RS485口485 port

Console port

Figure 6-2 485 communication card

56 Chapter 6 Application Of INTELLISLOT


6.2 Installing Host Communication Card

Installing communication card

The Liebert.PEX series air conditioner units have installed with installation boxes 1 and 2. If you want to install the host

communication configuration, insert the communication card into the installation box 1 and tighten the bolts as shown

in Figure 6-3.

Bolts

Communication card

Installation box 1

Installation box 2

Figure 6-3 Installing communication card

Connection

The electrical schematic figure of the host communication configuration is shown in Figure 6-4. P61, P65 and P67

cables have been connected in factory. So you should only connect the communication card to the monitoring center.

Intellislot

485 or TCP/IP communication card

P65

P61

P67

iCOM control board Standard diplay screen

Communication

cable

Monitoring center

Figure 6-4 Electrical schematic figure of host communication configuration

6.3 Commisstioning Host Communication Component

After communication cable is connected, you can start to set the HyperTerminal and communication card parameters.

� Note

Before commissioning, you must access into the ‘SERVICE Menus’ of the iCOM control board to set S824 MON ADD as ‘3’,

S835 MON PORT as ‘Vlcty(Velocity)’ and S843 BL CTRL as ‘S+R’.



6.3.1 Setting HyperTerminal

The 485 communication card and TCP/IP communication card must be set for communicating with the host monitoring

system. Use the communication cable provides with the communication card to connect the RS232 port of the

computer and the console port of the communication card and then set the parameters using the HyperTerminal of

Windows. The detailed setting procedures are as follows:

1. Click Start-> Programs -> Accessories -> Communications -> HyperTerminal, the HyperTerminal interface will

pop up, as shown in Figure 6-5. Type the name ‘tt’ in the Name field, and then click the OK button.

tt

Figure 6-5 Typing the name

2. In the Connect To dialog box, choose the serial port being used (such as ‘COM1’), and click the OK button, as

shown in Figure 6-6.

Figure 6-6 Choosing serial port

3. Set the communication parameters as shown in Figure 6-7 and click the OK button.

Figure 6-7 Setting port property



6.3.2 Setting 485 Communication Card

Set the parameters of the 485 communication card according to the following procedures:

1. After setting the HyperTerminal, click the OK button, the following interface will appear.

2. Type ‘1’ and the following figure will appear.


4. Type ‘1’ and select Modbus protocol, the following figure will appear.

5. Type ‘3’ and select the ID used to communicate between the communication card and the host, the following figure

will appear.



6. Type the server ID under the command prompt, as shown in the following figure.


8. Type ‘1’, ‘2’ or ‘3’ to select the baud rate, and the following figure will appear.

9. Press the ESC button to exit to return the main interface. If you type ‘x’, the setting can be saved. After saving, the

485 communication card will be restarted.

10. On the main interface, typing ‘4’ can view whether the communication status between the communication card and

the Liebert.PEX series air conditioner is normal, as shown in the following figure.

6.3.3 Setting TCP/IP Communication Card

Set the parameters of the TCP/IP communication card according to the following procedures:

1. After the HyperTerminal is set, you can click the OK button, the following figure will appear.





Normally, the Boot mode should be set to Static. If the user network can distribute the address automatically, the IP

address, netmask and gateway need not to be set. Type ‘3’, ‘4’ and ‘5’ and then type the corresponding IP address,

netmask and gateway respectively. These three parameters should be given by the user.

4. Press ESC button to return the main interface, as shown in the following figure. If you type ‘x’, the setting can be

saved. After saving, the TCP/IP communication card will be started.



5. On the main interface, typing ‘5’ can view whether the communication status between the communication card and

the Liebert.PEX series air conditioner is normal, as shown in the following figure.

6.3.4 Settiing SNMP Parameters Of TCP/IP Communication Card

After the HyperTerminal of the TCP/IP communication card is set, you can set the parameters for this communication

card. See following for details:

1. Type IP address of the TCP/IP communication card in the address bar of IE browser. If the interface shown in Figure

6-8 appears, it indicates that the communication between the communication card and the iCOM controller is

abnormal. If the State is Completing or In Process, it indicates that the communication card is communicating with

the iCOM controller.

Complete

Figure 6-8 Initial interface (1)



After normal communication, the interface will appear as shown in Figure 6-9.

Figure 6-9 Initial interface (2)

2. Click the configure tab to enter the configuration interface, as shown in Figure 6-10.

Figure 6-10 Configuration interface



3. Click the Access on SNMP at the left hand of the interface, as shown in Figure 6-11. Type user name ‘Liebert’ and

password ‘Liebert’ and click the OK button to enter the setting interface of configure. Note that the user name and

password are case-sensitive.

Password

Username

OK Cancel

Connect to

Figure 6-11 Typing user name and password

4. Configure the Network Management System (NMS) of the host monitoring center in Figure 6-12. Click the Edit

button and type the IP address of the NMS in IP Address. Select the ‘read’ or ‘write’, type ‘Public’ in Community and

then click the Save button.

� Note

1. Before setting the NMS, the Edit button is displayed in the interface. After editing the configuration, the Edit button will

become the Save button.

2. After the NMS is configured, you must click the Save button to save the setting.

Figure 6-12 NMS configuration interface of SNMP host monitoring center (1)



5. Unfold the SNMP at the left hand of the interface shown in figure 6-13 and click Traps to set IP Address, Port and

Community of the NMS for receiving Traps. After modifying, you must click Save to save the setting.

Figure 6-13 NMS configuration interface of SNMP host monitoring center (2)

6.4 Host Communication Networking Diagram

The networking figure of the TCP/IP communication card (SNMP protocol) is shown in Figure 6-14. The air conditioner

number is not limited.

HUB

…

AC 1 TCP/IP card

AC 2 TCP/IP card

AC n TCP/IP card

Network cable

connection

Monitoring center

Network cable

connection

Network cable

connection

Network cable

connection

Figure 6-14 Networking figure of TCP/IP communication card

� Note

The single unit does not need HUB.

The networking figure of the 485 communication card (Modbus protocol) is shown in Figure 6-15. Up to 32 air

conditioner units can be connected.

…

AC 1 485 card

AC 2 485 card

AC 32 485 card

485 connection

485 connection

485 connection

485 connectionMonitoring center

Figure 6-15 Networking figure of 485 communication card

Chapter 7 System O&M 65


Chapter 7 System O&M

This chapter introduces the operation and maintenance of the Liebert.PEX series air conditioner.

7.1 System Self-diagnosing Test

7.1.1 Self-diagnosing Functions

As limited by the environmental conditions, certain components may remain idle for a long time, and there is no telling

of whether they are faulty. However, upon urgent needs, such components may fail to meet the demand. Therefore it

is necessary to check the system components regularly. The controller provides the function that enables you to turn

on/off the components onsite manually so as to check their functionality. For the operation instruction, see 5.7.5

DIAGNOSTICS.

� Note

1. During the operation of the Liebert.PEX system, lethal voltage may be present in the internal parts. It is a must to obey all the

notes and warnings marked on the equipment or contained in this manual, otherwise injury or fatality may occur.

2. Only qualified maintenance and repairing personnel can operate and process the system.

7.1.2 Electric Control Part

Maintenance of electric part

Carry out visual inspection and handling over the electrical connection by referring to the following items.

1. Overall electrical insulation test: find out the unqualified contacts and handle them. Note to disconnect the fuses or

MCBs of the control part during the test lest the high voltage should damage the control components.

2. Carry out detection over the contactors before the power-on, make sure the contactors can act freely without

obstruction.

3. Clean the electric and control components of dust with brush or dry compressed air.

4. Check the closing of contactors for arcs or signs of burning. Replace the contactor if necessary.

5. Fasten all the electric connection terminals.

6. Check that the sockets and plugs are in good condition. Replace those loosened ones.

Maintenance of control system

Carry out visual inspection, simple function test and handling over the control parts by referring to the following items.

1. Visually inspect the power transformers and isolation transformers and test the output voltage (of the indoor unit &

outdoor condensers).

2. Check that there is no signs of aging on the control interface board, display control board, sensor board and fuse

board.

3. Clean the electric control components and control board of dust and dirt with brush and electronic dust removing

agent.

4. Check and fasten the I/O ports at the control interface board, including the connection between display control

board and control interface board, as well as between the temperature/humidity sensor board and the interface board.

5. Check the connection between the user terminals (70, 71, 70A, 71A, 37, 38, 77, 78) and the control interface board.

6. Check the output connection between the control interface board and various components, including various

contactors, solenoid valves for liquid pipes and bypass solenoid valves (HG bypass, liquid bypass). The input

connection between control interface board and various components, including fan overload protector, HP/LP

switches, heating over-temperature protection switch, humidifier dry-burn protection switch, filter clogging switch and

filter pressure difference switch. In particular, check the connection parts such as HP/LP switches and solenoid valves,

and replace the component if it is found loosened or in poor connection.

7. Replace the electric components that are detected faulty, such as faulty control fuses (or MCBs) and control boards.

66 Chapter 7 System O&M


8. Check the specification and aging situation of the control cable and power cable between the indoor unit and the

condenser, and replace the cable when necessary.

9. Use temperature/humidity measuring meter with high precision to proof-read and calibrate the temperature/humidity

sensor. Note to set the humidity control mode to RH control during the process of calibration.

10. Check the following external sensors.

1) Smoke detector (optional)

The power supply of the smoke detector is located at the bottom (or top) of the upflow (or downflow) unit. It

incessantly samples the air, analyzes the samples and makes judgment. It requires no calibration.

2) Water leak detector

The water leak detector has a dry contactor. The contactor will close when the detector probes detect water or

other conductive liquid.

The detector should be placed away from any water pool or drainage trench on the floor, 2m ~ 2.5m away from the

machine. Do not place it directly under the machine. The recommended location for the water leak detector is

shown in Figure 7-1.

Drain pipes on the ground

Liebert system

Location of leak

detection sensor

Location of leak

detection sensor

Figure 7-1 Recommended location for the water leak detector

� Note

1. Before connecting any mechanical parts or cables, make sure the power supply of the control unit has been disconnected.

2. Do not use the water leak detector adjacent to flammable liquid or use it to detect flammable liquid.

11. Adjust the set points. Check the auto-flush control logic and HG bypass logic of water pan of the infrared humidifier

and the action of the functional parts according to control logic.

12. Simulate the fault scenario to check the work state of protection devices including high/low voltage alarm, high/low

temperature alarm, high/low water level alarm and over-temperature protection device.

7.2 Dust Filter

To ensure efficient operation, the dust filter must be checked once a month, and be replaced as required. The filter

clogging switch and pressure difference switch are located as shown in Figure 7-2.

过滤网堵塞开关调节旋钮

风机气流安全开关

过滤网堵塞开关

Rotary switch for filter

clogging switch

Filter clogging switch

Pressure difference

switch

Figure 7-2 Filter clogging switch and pressure difference switch



Power off before replacing the filter. You need to adjust the setting point of the filter clogging switch if the new filter is of

a different model. The filter clogging switch is located in the electric control box. It samples the air pressures before

and behind the filter through a black hose, and decides the output after comparing the two values.

To adjust the setting point of the filter clogging switch, you should:

1. After replacing the filter, restore and seal all the panels, so that the alarm point can be found precisely.

2. Keep the fan running, and rotate the rotary switch of the filter clogging switch counter clockwise until the filter alarm

is triggered.

3. Rotate the rotary switch clockwise for 2.5 rounds, or rotate it according to the new filter’s model.

� Note

1. Set the setting point properly. Otherwise, the filter alarm may be triggered too frequently; or, in the opposite case, the dust

accumulation on the filter could not trigger the alarm, endangering the system operation due to deteriorated ventilation.

2. If you are unsure about the setting point, consult with Emerson before using a filter of a different model to replace the old one.

7.3 Fan Kit

The fan components that require regular checking include belt, motor bracket, fan bearing and blades.

The fan and the installation board are designed in consistency. The belt tension is regulated automatically under the

force of gravity, so as to reduce the fan vibration and protect the belt. If you need more details, please contact the

manufacturer.

7.3.1 Fan Bearing And Blades

Check the fan regularly to make sure the bearing is firmly fixed. Rotate the blades and make sure that they do not

scratch the wall of the air duct. Because the bearing is permanently sealed and self-lubricated, check for signs of

wearing when adjusting the belt. Roll the belt and observe the motion of the fan bearing. If any abnormal displacement

is observed, replace the bearing.

7.3.2 Belt

Measure the belt tension with a tension meter. You can also press down the belt at the middle point between the two

pulleys. The displacement should be 0.5” ~ 1”.

If the belt is found worn out or distorted, replace it with a new belt. The new belt should be of the same model as the

old one.

7.3.3 Motor

To replace the failed motor, you need to be very careful, especially with the upflow unit. Use a dedicated fixture to hold

the motor before removing the fixing bolts at the bottom of the motor.

7.4 Infrared Humidifier

During the normal operation of the humidifier, sediment will accumulate on the water pan. To ensure efficient operation

of the humidifier, you need to clean the sediment regularly. However, the cleansing cycle varies because the water is

different in different regions. It is recommended to check, and cleanse (when necessary) the water pan, once a month.

Remove the water level regulator to drain the water pan. Disconnect the drainage pipe, remove the dry-burning

protection switch of the water pan, remove the fixing screws at the two ends of the pan, and pull out the water pan.

Cleanse the water pan with water and hard brush, and restore the water pan by reversing the preceding procedures.

� Note

Before removing the water pan, make sure that the power has been cut off, and the water in the water pan is not too hot.

The autoflush function of the humidifier can prolong the cleansing cycle. However, timed check and maintenance are

indispensable.

Replacing the lamps of the humidifier

The lamp of the infrared humidifier is shown in Figure 7-3. Follow the procedures below to replace it.



1. Cut off the main isolation power switch.

2. Unplug all the control lines of the humidifier and cut off the cable ties that binds the humidifier power cables. In the

single-door system, the plugs of the humidifier are sealed in the niche above the lamp, and you need to open the cover

plate in front of the humidifier before you can reach the plugs. The plugs of the double-door and triple-door systems

are located to the left of the humidifier and are accessible directly.

3. After draining the water in the water pan, remove the drainage pipe, remove the fixing screws on both sides of the

humidifier, and then pull out the humidifier.

4. Open the cover plate (for single-door system, this cover plate has been opened in step two) to reveal the ceramic

socket. Use the multimeter to locate the burned lamp.

5. Remove the humidifier water pan.

6. Remove the brackets in the middle that support the lamps.

Infrared lamp

Ceramic socket Lamp supporting bracket

Fixing screw of

ceramic socket

Fixing screw of wires

Lamp supporting bracket

Figure 7-3 Lamps of infrared humidifier

7. Remove the screws that fix the cables of the lamp to be replaced from the ceramic sockets (note to hold the lamp

with hand).

8. Pull down the lamp.

9. Install a new lamp.

� Note

Do not touch the quartz lamp with bare hands! Greasy sediment and finger prints can seriously shorten the life span of quartz

lamps. Therefore, put on clean cotton gloves during the operation.

10. Restore the humidifier by reversing steps 3 ~ 8.

Autoflush system of the infrared humidifier

� Note

The normal operation of the autoflush system, the humidifier demands a water source with minimum water flow of 1gpm (0.063

l/s) and minimum pressure of 20 psig (138kPa).

Operation of the autoflush

The autoflush control program is an integral part of the infrared humidifier system. The program automatically controls

a water makeup valve to maintain the proper water level in the humidifier pan during operation. When a call for

humidification exists, the program performs a series of checks.

The first check is to see how long the infrared humidifier has been off. If the off time is equal to or greater than the

programmed value (factory default is 15hr), it is assumed that the pan is dry and a program called pre-fill is initiated to

add water to the pan. During the pre-fill operation the infrared lamps are inactive. The pre-fill time is programmable

with an adjustable range of 1 ~ 120s for either pan size. The factory default for a large pan is 60s and for a small pan is

30s.

If the off time is less than 15hr (or user programmed value) the pre-fill program is bypassed and the infrared lamps and

water valve are activated at the same time to fill the pan to the proper water level and initiate humidification.

During normal infrared humidification operation the water makeup valve is periodically closed (no pan fill) and opened

(pan fill) based on a timing sequence to allow for the evaporation of water from the pan.

With the humidifier water flush rate set at the factory default value of 150% the water makeup valve will open for 7min

of till time with an off time of 45s between fill cycles for a small pan. For a large pan water makeup valve will open for

10min of fill time with an off time of 80s between fill cycles. You can modify the percentage from 110% to a maximum

of 500% in 1% increments. See Figure 7-4 for humidification control logic.



Yes

Note:

HMV: humidifier valve

IFS: Infrared small pan

IFL:Infrared large pan

Call for humidificationOn in last

15 hours?No

refill

HMV and

lamps on

4min: IFS

7min: IFL

Humidificationlamps only

8min: IFS

10min: IFL110% ～ 500%

HMV pre-fill

IFS: 30s

IFL: 60s

Figure 7-4 Humidification control logic

7.5 Electric Reheat

Check the rust on the electric reheat. If necessary, clean the dust with wire brush, or replace the heater.

The electric reheat is classified into upflow heater and downflow heater, as shown in Figure 7-5. Three temperature

switches are in series connection within the internal control circuit of the heater, including two auto-reset switches and

one manual reset switch. When the heater does not respond to the heating demand, check that the manual reset

switch is on.

Manual reset switch

Automatic reset switch

Upflow electric reheat

Manual reset switch

Automatic reset switch

Downflow electric reheat

Figure 7-5 Upflow electric reheat and downflow electric reheat

7.6 Cooling System

Check the cooling system components once a month to make sure that the system function is normal and there are no

signs of wearing. Because the failure or damage of components is usually accompanied by corresponding faults,

regular checking is a major means to prevent most system faults. The refrigerant pipes must be supported by properly

set brackets, and be laid away from the ceiling, floor or anywhere that vibrates. Check the refrigerant pipes once every

six months to make sure that they are not worn out, and the fixing brackets are not loosened.

Each system has a sight glass to facilitate the observation of refrigerant flow and the system moisture content. When

the system moisture content is too high, the sight glass turns from green to yellow.

When the cooling system is faulty, you can locate the fault by referring to certain parameters of system operation.



7.6.1 Suction Pressure

The compressor may stop when the suction pressure drops below the setting of the low-pressure switch. On the other

hand, too high suction pressure will undermine the cooling effect the refrigerant does to the compressor motor, leading

to the damage of the compressor. The minimum (pressure switch action point) and the maximum (allowed by the

system operation) suction pressure are listed in Table 7-1.

Table 7-1 Suction pressure

System Min. pressure kPa (PSIG) R-22 Max. pressure kPa (PSIG) R–22

Air-cooled (stepless fan speed controller) 138 (20) 620 (90)

Water-cooled 138 (20) 620 (90)

Note:

The maximum operation LP of single system HG bypass should be lower than 700kPa

7.6.2 Exhaust Pressure

The exhaust pressure may change with the load or the condenser efficiency. When the exhaust pressure rises to the

setting of the pressure switch, the high pressure switch will act to stop the compressor. See Table 7-2 for details.

Table 7-2 Exhaust pressure

System design KPa (PSIG) System design KPa (PSIG)

Air-cooled 1750 (251) Maximum pressure 2275 (330)

Water below 65°F ~ 75°F 1400 (203) Water-cooled

Water at 85°F 1450 (210)

High pressure switch action

point 2760 (400)

7.6.3 Suction Superheat Degree

The Thermal Expansion Valve (TXV) can regulate the suction superheat degree. Follow the procedures below to

determine the system suction superheat degree.

1. Measure the temperature of the suction pipe at the TXV thermo bulb.

2. Sample the compressor suction pressure at the needle valve of the suction pipe.

3. Evaluate the pressure difference between the two locations: thermo bulb and needle valve of the suction pipe.

4. Add the sum of the preceding two pressures with the standard local air pressure to find out the saturation

temperature corresponding to the saturation pressure.

5. The difference between the suction temperature at the thermo bulb and the saturation temperature is the suction

superheat degree.

The suction superheat degree is critical to the compressor lifespan. If the compressor runs with little or no suction

superheat degree for a long time, slugging may occur to the compressor, crashing the scroll plate of the scroll

compressor.

7.6.4 Expansion Valve

Operation

The auto-regulation of the expansion valve guarantees sufficient refrigerant for the evaporator in order to meet the

needs of the load. The superheat degree is an indicator of the operation state of expansion valve. If the refrigerant to

the evaporator is insufficient, the superheat degree will be high; and if the refrigerant to the evaporator is too much, the

superheat degree will be low. The proper superheat degree is 42.08°F ~ 46.94°F.

Regulation

Follow the procedures below to regulate the superheat degree setting.

1. Unscrew the bonnet at the bottom of the expansion valve.

2. Rotate the rotary switch counter clockwise to reduce the superheat degree.

3. Rotate the rotary switch clockwise to raise the superheat degree.



� Note

1. Before delivery, the refrigerant of water-cooled unit has been charged, and the expansion valve has been adjusted. If you need

to adjust the expansion valve, please contact Emerson.

2. Every time you rotate the rotary switch, do not rotate it for more than one round, and it may take up to 30mins to reach a new

balance.

7.6.5 Hot Gas Bypass Valve (For Single Compressor System)

When the heat load in the room is not high, the single compressor system can regulate the indoor temperature by

using the hot gas bypass valve. In this way, the frequent use of the compressor is avoided, which is also energy saving.

The hot gas bypass is shown in Figure 7-6.

Compressor

Condenser

Evaporator

HG bypass

valve


Dehumidification

solenoid valve

Figure 7-6 Hot gas bypass

The control logic of the hot gas bypass is shown in Figure 7-7.

Setpoint0% 100%50 % +Temperature

Compressor off Compressor on

HG bypass on HG bypass off

Dead band Cooling

Figure 7-7 Control logic of hot gas bypass



7.6.6 Liquid Line Bypass Solenoid Valve (For Water-cooled Series Only, Compressor-on Bypass)

The water-cooled series uses the Plate Heat Exchanger (PHE) as its condenser. Thanks to the high efficiency and

compact structure of the PHE, the volume of PHE is small, as compared to the air-cooled condenser. Before the

power-on, the PHE could be the coldest part in the system, and partial coolant would move to the PHE. Upon system

power-on, the system high pressure would soon reach the system HP protection point, and trigger the protection. The

liquid line bypass solenoid valve is designed to bypass the coolant upon system power-on, as shown in Figure 7-8.

The valve is normally off. It turns on when the compressor starts upon system power-on. The lead-time before the

bypass and the bypass time are settable.

Water inlet

Water outlet

Compressor

PHE

Water regulating valve

Evaporator

Expansion

valve

HG

bypass valve

Bypass

solenoid

valve

Dehumidification

solenoid valve

Figure 7-8 Bypass solenoid valve

When the system demands cooling, while the compressor fails to start after frequent on-off (within 10 min, after three

on-offs, HP alarm still occurs upon the forth on) due to the high pressure, make sure the bypass valve is on. If the

bypass valve is on while the compressor still cannot start, check whether or not the temperature of the water input to

the PHE is within the stipulated range.

7.6.7 Air-Cooled Condenser

For more detailed maintenance information, see the maintenance part of the Liebert.PEX Condenser User Manual.

7.6.8 Water-cooled Condenser

Plate heat exchanger

The turbulence generated in the ducts of soldered PHE can clean the ducts. However, on occasions when scaling is

serious, like when hot hard water is used, it is necessary to use cyclic rinsing device to clean the PHE. Put weak acid

(like 5% phosphoric acid) into a jar and use a pump to inject the fluid into the PHE to clean it. If the PHE is cleaned

regularly, use 5% oxalic acid.

The cleaning of the PHE is not covered by Emerson maintenance service. If necessary, you can consult with Emerson

service personnel.

Water flow regulator

The water flow regulator adjusts the valve position by collecting the exhaust pressure signal from the cooling system,

so as to control the water flow through the PHE. The heavier the load is, the more water flow is allowed to flow through

the PHE. The valve is composed of a copper body, balancing spring, seat, valve fixer, capillary tube and regulating

rod.

Regulating method

The valve can be adjusted with a ratchet wrench.

To reduce the condensing pressure, turn the square adjusting screw clockwise to the desired setting.



To raise the condensing pressure, turn the square adjusting screw counter clockwise to the desired setting.

Function test

Shut down the cooling system first. After 5mins ~ 10mins, the water flow should stop. If the water flow does not stop, it

means the valve setting is improper, or the connection between the pressure sensitive capillary tubes and the

condenser is incorrect.

7.6.9 Replacing The Compressor

� Warning

No direct contact between the refrigerant or lubricant and the skin when replacing the compressor, or serious burning or frostbite

may occur. Put on gloves with long sleeves when processing polluted parts.

The Liebert.PEX system uses the highly reliable Copeland scroll compressor. If handled properly, the failure rate is

extremely low.

It is rare for the motor of the compressor to get burned due to short circuit. In the few cases when the motor does get

burned, the cause is usually mechanical or due to poor lubrication, in other words, due to over-temperature.

If the causes that lead to the compressor failure could be discovered and corrected in time, most failures are avoidable.

The maintenance personnel should check the operation situation periodically and take necessary measures to ensure

the system normal operation. This practice is both easy and cost saving, when you compare it with replacing the

compressor upon faults that result from negligence.

When diagnosing the compressor, check the operation situation of all the electric parts of the compressor.

1. Check all the fuses and circuit breakers.

2. Check the operation of HP and LP switches.

3. When the compressor is faulty, find out the nature of the cause: is it an electrical fault or a mechanical fault?

For mechanical faults

Upon a mechanical fault, there is no burned smell. You should try spinning the motor. If the fault is proved to be

mechanical, the compressor has to be replaced. If the motor is burned, you should remove the fault that leads to the

burning of the motor and clean the system. It must be pointed out that the compressor motor is usually burned

because the system is not cleaned properly.

For electric faults

You can tell an electric fault by the unpleasant smell. If serious burning occurred, the lubricant will appear black and

become acid. When electric fault occurs and the compressor motor is entirely burned, the system must be cleaned to

remove the acid material from the system and to avoid such faults in the future.

� Note

The damage to the compressor components due to improper way of cleaning is classified in the warranty agreement as improper

usage of the product, thus is not covered by the warranty.

When the compressor is entirely burned, you need to replace the filter drier together with the compressor. In addition,

check the expansion valve. If the valve is faulty, replace it too. Before the replacement, you must clean the system. If

you are unsure about the cleaning method, please consult with Emerson service personnel.

Compressor replacing procedures

1. Cut off the power supply.

2. Connect the LP and HP tubes of the pressure gauge to the needle valves of the suction and exhaustion pipes

respectively to recycle the refrigerant.

� Note

The refrigerant must be recycled or disposed in accordance with the local regulations. Discharging the refrigerant into the air is

harmful to the environment and illegal.

3. Disconnect all the electric connection to the compressor.

4. Disconnect the Rotalocks from the exhaust and suction openings on the compressor.

5. Remove the faulty compressor.



6. If the compressor has been entirely burned, you need to clean the pipes of the cooling system and replace the filter

drier.

� Note

Do not remove the rubber covers from the suction opening and exhaust opening of the new compressor too early. The time that

the openings are exposed to the air should not exceed 15mins so as to prevent the compressor refrigeration oil from absorbing

water and bringing the water into the system.

7. Install the new compressor, and connect the pipes and electric cables.

8. Pump the system vacuum and add refrigerant in accordance with the commissioning regulations.

9. Power on the system by following the ordinary startup commissioning procedures and check the system operation

parameters. Observe the refrigerant state through the sight glass, and determine the amount of refrigerant to be added

by considering the system pressure and temperature until the system enters normal operation.

Chapter 7 Troubleshooting 75


Chapter 8 Troubleshooting

This chapter introduces the troubleshooting. You can read this part by referring to the part concerning the alarms.

� Caution

1. Certain circuits carry lethal voltages. Only professional technicians are allowed to maintain the machine.

2. Extra care should be taken when troubleshooting online.

� Note

If jumpers are used for troubleshooting, remember to remove the jumpers after the troubleshooting, or the connected jumpers

may bypass certain control function and become a potential risk to the equipment.

Table 8-1 Fan fault removal

Symptom Possible causes Handling method

No main power supply Check the rated voltage at L1, L2 and L3

Circuit breaker tripped or

fuse blown Check the fuse and circuit breaker of the main fan unit

Overload, or MCB tripped Reset manually, and check the average current

Contactor does not close Check the voltage between P36-3 and E1. If there is a 24Vac, while the

contactor does not close, the contactor is faulty. Replace the contactor

Control board faulty Check the voltage between P36-3 and E1. If there is no 24Vac, the control board

is faulty. Check the state of the green indicator beside Q5 on the control panel

Fuse board faulty

Check the voltage between P36-3 and E1. If there is no 24Vac, and the green

indicator beside Q5 is off, check the indicator DS4 beside fuse F4 on the fuse

board, or take down the F4 fuse tube to see whether or not it has blown

Air flow lose switch alarm

(action ) Check whether the belt is loose or the fan has faulty

Fan does not

start

Fan failure Replace the fan

Table 8-2 Troubleshooting of compressor and cooling system


Power not on (shutdown) Check the main power switch, fuse or circuit breaker and

the connecting cable

Power overloaded and MCB tripped Manual reset and check the average current

Circuit connection loosened Fasten the connections

Compressor does

not start

Compressor coils shorted Check the motor and replace it if defects are found

No demand for cooling Check the controller state Compressor does

not start, contactor

does not close High voltage switch acted Check the high voltage switch

Fuse blown or circuit breaker disconnected Check the fuse, circuit breaker and the contactor, and

measure the circuit voltage Contactor closed,

but compressor

does not start Compressor internal circuit breaker open Check the compressor coils. If the coils are open, they will

reset automatically after they cooled down

Compressor stops

after running for

5mins (1min ~

5mins settable).

Contactor open

Refrigerant leaked, the LP switch does not

close Check the suction pressure

Condenser clogged (air-cooled) or

temperature of input water too high

(water-cooled)

Clean the condenser (air-cooled)

Check the cooling water system

Condenser system does not start Check the operation procedures

Too much frigerant Check whether or not the subcooling degree is too high

High exhaust

pressure

Water flow regulator improperly set

(water-cooled) Adjust the water flow regulator

76 Chapter 8 Troubleshooting



Water flow too big or temperature of input

water too low (water-cooled)

Adjust the water flow regulator

Check the cooling water system

Refrigerant leaked Locate the leakage point, repair it and add refrigerant Low exhaust

pressure Fan speed controller of outdoor unit is faulty,

while the output voltage remains 100%,

regardless of the change of condensing

pressure (air-cooled)

If the fan speed controller is found faulty, replace it

The suction and

exhaust pressures

do not change after

startup

Compressor reversed or compressor internal

air tightness failed

If compressor reversed, exchange any two L lines of the

compressor. If the compressor internal air tightness failed,

replace the compressor

Insufficient refrigerant in the system Check for leaks. Seal the leaking point and add refrigerant

Air filter too dirty Replace the air filter

Filter drier clogged Replace the filter drier

Improper superheating degree Regulate by strictly following the adjusting procedures of

the thermal expansion valve

Sensor of the expansion valve faulty Replace the expansion valve

Improper air flow distribution Check the air supply and return system

Low condensing pressure Check for condenser fault

Low suction

pressure or liquid

returned

Belt slipped Check the belt and make necessary adjustment

Liquid returned Refer to the handling methods of “Low suction pressure or

liquid returned”

Bearing worn out due to insufficient lubricant Add lubricant

Compressor too

noisy

Fixture of compressor or pipes loosened Fasten the fixture

Too high compression ratio

Check the settings of the HP switch and LP switch, and

make sure the condenser is not clogged

Check that the fans of the evaporator and condenser are

normal

Compressor

over-temperature

Suction temperature too high Regulate the expansion valve or add proper amount of

refrigerant

Table 8-3 Troubleshooting of dehumidification system


No dehumidification demand from the control

system Check the control system

Compressor contactor does not close Refer to the compressor related Table 8-2

Compressor does not start, fuse blown or

circuit breaker tripped

Refer to the compressor related Table 8-2

Or check the fuse, or the circuit breaker and the contacts,

and check the line voltage

Dehumidification

ineffective

Hot gas bypass valve not closed (single

compressor system)

Check the control circuit related to the hot gas bypass

valve

Table 8-4 Troubleshooting of infrared humidifier


Check the water supply

Check the water supply solenoid valve

Check the state of the high water-level switch / water-level regulating valve

No water in the

water pan

Check that the water supply pipe is not clogged

No humidification

demand Check the state of the controller

Check the contactor, and check the circuit voltage of the fuse or circuit breaker

The humidification

contact does not

close

Check the opened safety devices of the humidifier: water pan over-temperature

protection switch and lamp over-temperature protection switch. Use a jumper to

shot terminals P35-6 and P35-5. If the contactor closes, replace the

series-connected safety device, and remove the jumper

Humidiifcation

ineffective

Humidifier lamp

burned Replace the lamp

Chapter 7 Troubleshooting 77


Table 8-5 Troubleshooting of heating system


No heating demand Check the controller Heating system does not

start, the contactor does

not close

Safety device of the

heating system is open

In the case of two-level heating, check terminals P34-6 and P34-7. If

the heating system then starts to work, it means the safety device is

open. Remove the jumper and replace the safety device

Contactor closes, but

heating is ineffective Heater burned

Cut off the power supply and measure the resistance of the heater

with an Ohm meter

Affiliated table 1: Monthly maintenance table

Inspection date: ___________________ Prepared by:___________________

Unit model: ___________________ Unit SN: ___________________

Filters:

___ 1. Check for clogging or damage

___ 2. Check the filter clogging switch

___ 3. Clean the filter

Fan

___ 1. Fan blades are not distorted

___ 2. The bearings are not worn out

___ 3. The belt tension and condition

Compressor

___ 1. Check for leakage

___ 2. Listen to the operation sound, observe the

operation vibration

Air-cooled condenser (if used)

___ 1. Check the fins cleanness

___ 2. The fan base should be firm

___ 3. The fan vibration absorber is not deteriorated

or damaged

___ 4. The SPD board should be effective (in the

storming seasons, the SPD board should be check

once a week)

___ 5. The refrigerant pipes are properly supported

Refrigeration cycling system

___ 1. Check the suction pressure

___ 2. Check the discharge pressure

___ 3. Check the refrigerant pipes

___ 4. Check the moisture content (through the

sight glass)

___ 5. Check the HG bypass valve

___ 6. Check the thermal expansion valve

___ 7. Check the liquid line bypass valve

(water-cooled system)

Heating system

___ 1. Check the re-heater operation

___ 2. Check the erosion situation of the

components

Infrared humidifier

___ 1. Check clogging of the drain pipes

___ 2. Check the lamps of the humidifier

___ 3. Check the mineral sediments on the water

pan

Signature: _________________________________________________________

Note: copy this table for filing.

78 Chapter 8 Troubleshooting


Affiliated table 2: maintenance table (six-month)

Inspection date: ___________________ Prepared by:___________________

Unit model: ___________________ Unit SN: ___________________

Filters

___ 1. Check for clogging or damage

___ 2. Check the filter clogging switch

___ 3. Clean the filter

Fan

___ 1. Fan blades are not distorted

___ 2. The bearings are not worn out

___ 3. The belt tension and condition

___ 4. Check and fasten the circuit connections

Compressor


___ 2. Listen to the operation sound, observe the

operation vibration


Air-cooled condenser (if used)

___ 1. Check the fins cleanness

___ 2. The fan base should be firm

___ 3. The fan vibration absorber is not deteriorated

or damaged

___ 4. The SPD board should be effective (in the

storming seasons, the SPD board should be check

once a week)

___ 5. Check the voltage regulating function of the

rotation speed controller

___ 6. The temperature switch is set at the required

position

___ 7. The refrigerant pipes are properly supported


Water-cooled condenser (if used)

___ 1. Clean the water pipe system

___ 2. Check the water flow regulating valve


Refrigeration cycling system

___ 1. Check the suction pressure and suction

superheat degree

___ 2. Check the discharge pressure and

condensing subcooling degree

___ 3. Check the refrigerant pipes

___ 4. Check the moisture content (through the

sight glass)

___ 5. Check the HG bypass valve

___ 6 Check the thermal expansion valve

___ 7. Check the liquid line bypass valve

(water-cooled system)

___ 8. Check whether or not refrigerant should be

added through the sight glass

Heating system

___ 1. Check the re-heater operation

___ 2. Check the erosion situation of the

components


Infrared humidifier

___ 1. Check clogging of the drain pipes

___ 2. Check the lamps of the humidifier

___ 3. Check the mineral sediments on the water

pan


Electric control part

___ 1. Check the fuses and MCB


___ 3. Check the control program

___ 4. Check the contactor action

Signature _________________________________________________________

Note: copy this table for filing.

Appendix 1 Composition Of Electrical Control Box 79


Appendix 1 Composition Of Electrical Control Box

1234568

9

10 11 13 12 14 15 16 17 18

21

A处 20 21

A处放大

19 20

22

12345678 7 6 5 4 321

10 11 12 13141516 1718

9 21

A

22

19 20

Amplified figure of A

Figure 1 Internal composition of electric control box of single compressor system

123456

10 11 13 14 15 17 18

A处

12 16

22

20

A处放大

2019

21

2 1345678

9

8 7 6 5 4 3 2 1

10 11 12 13

9

1415 16 17 18

2019


21

A

22

Figure 2 Internal composition of electric control box of two-bay system

� Note

The two-bay single system has only one compressor MCB and contactor.

1: Compressor MCB 7: Control board MCB 13: N/PE terminal block 19: Main N terminal

2: Busbar 8: Fuse board 14: Humidifier contactor 20: Main grounding terminal

3: Fan MCB 9: Control board 15: Electric reheat contactor 21: Fan contactor

4: Electric reheat MCB 10: Control terminal block 16: Fan over-current protector 22: Temp./hum. sensor board

5: Infrared humidifier MCB 11: Power transformer 17: Compressor contactor

6: Outdoor unit (air-cooled) MCB 12: Isolation transformer 18: Main isolation switch

80 Appendix 1 Composition Of Electrical Control Box


123456

10 11 13 14 15 17 1812 16

20

A处放大

2019

23

21

A处

22

2345678

9

8 7 6 5 4 3 2 1

9

10 11 12 1415 16 17 1813

2019


21

A

22

Figure 3 Internal composition of electric control box of three-bay system

1: Compressor MCB 7: Control board MCB 13: N/PE terminal block 19: Main N terminal

2: Busbar 8: Fuse board 14: Humidifier contactor 20: Main grounding terminal

3: Fan MCB 9: Control board 15: Electric reheat contactor 21: Fan contactor

4: Electric reheat MCB 10: Control terminal block 16: Fan over-current protector 22: Temp./hum. sensor board

5: Infrared humidifier MCB 11: Power transformer 17: Compressor contactor

6: Outdoor unit (air-cooled) MCB 12: Isolation transformer 18: Main isolation switch

Appendix 2 Circuit Diagram 81


Appendix 2 Circuit Diagram

R

OR

OR

R

R

R R R R

41-3

41-4

42-1

42-2

43-2

UNIT ALARM

P64 W

IRES INCLUDED ON

LARGE DISPLAY ONLY

LINE

VOLTAGE

3 PHASE

SUPPLY

SEE UNIT NAMEPLATE

FOR M

AIN SUPPLY

WIRE SIZING

BR

SDT

BR

COMMON ALARM

CONNECTION

GN/Y

EARTH GROUND CONNECTION

ALL FIELD W

IRING SEE NOTE 1

CUSTOMER CONNECTIONS ALSO SEE LINES 2,3,5,14,21,22,23,24,29,31,32,33,36,45,51,54,64,66

L1

Y

L2

L3

GN

R

R R R

1H

2H

3H

Y1C1

GN

2C1

R3C1

L1

L2

L3

L1

L2

L3

COMPRESSOR NO.1

1

RR

OR

HWA

U20

U23

Q6

Q5

RR

OR

OR

U21

REMOVE W

IRES W

HEN R3 IS PRESENT

MF1

OR

U22

R3

K3

K3

1-4

38-3

40-2

40-4

40-6

40-7

OR

BR

OR

BR

RRAD1

50 51

55

56

U16

U17

U18

U19

40-8

38-2

BR

24

HMV

FC

T2

T1

24V

PCB CONTROL FUSES

OR

OR

38-1

22-1

22-3

22-6

Q18

Q17

R

66-1

66-6

64-1

64-8

E1

24-1

E2

E5

E4

E3

43-1

41-1

41-2

43-2

4-1

4-2

4-3

4-4

44-2

44-1

4-1

4-2

4-3

4-4

R R

40-3

40-5

39-2

8-5

39-3

39-4

35-3

40-9

36-1

35-4

36-2

36-6

36-3

36-8

8-6

40-1

39-1

8-7

8-4

8-3

8-2

8-1

OR

22-5

22-2

22-4

52-4

52-1

52-2

52-3

53-1

54-1

52-5

53-2

54-2

53-3

54-3

53-5

54-5

53-4

54-4

BR

AS-C

OR

U15

R

OR

OR

RH1

RH2

DHV

H

R R

BR

BR

BR

1EM1

2EM1

R

HS3

R

1-7

SEE NOTE 4

SEE NOTE 4

36-5

36-7

34-2

35-5

51-4

7-1

7-2

34-7

34-5

34-9

36-4

34-4

34-6

34-8

35-1

R35-2

35-6

35-7

51-1

51-2

51-3

51-5

1-3

Q12

Q13

HGBP1

U29

U28

Q14

C1

RR

32-1

33-1

32-2

33-2

32-4

1-1

32-9

32-8

32-6

Q15

Q8

Q9

LLSV2

U26

U25

Q10

C2

BR

BR

K11

36-932-3

33-4

33-5

32-5

1-2

33-9

33-8

32-7

33-3

65-1

65-2

OR

W/OR

1C2

2C2

3C2

L1

L2

L3

COMPRESSOR NO.2

OR2RH1

3RH1

L1

L2

L3

OR1RH1

1MF1,2,3

BK

BR

GY

MAIN FAN 1,2,3

FAN M

OTOR OVERLOAD

L1

L2

L3

LLSV1

76

75

78

77

81

80

ELECTRIC REHEAT 1

L1

L2

L3

INCLUDED W

ITH R3

1-6

1-5

FACTORY M

OUNTED M

AIN UNIT SWITCH

OR CIRCUIT BREAKERS

( )

C1AUX

C2AUX

( )

24-2

SHADED AREAS M

AY BE FUSES

43-1

E-1

BK

K3

HP2

LP2

HP1

LP1

EARTH GROUND CONNECTION

NEUTRAL

EARTH

R4C1

L1

L3

REMOTE CONDENSER 1，2

CCH1

R4C2

CCH2

1 BAY REHEAT 2 USES CB OF REHEAT 1

REHEAT 2 CB2 NOT FITTED

CP

3 2

BRROR

BR

BK

R 6

51SD

91

92

93

R OR

BR

91

92

93

G5

90

24

50

5

RESET

SDC

1 2 3 4

SDT

FORM NO. 180205 REV 1

12

34

56

78

ABCD

BC

12

34

56

78

60

5550

45

40

35

30

25

2015

10

55

10

15 20

25

30 35

40

45 50

55

60

NOTES

OPTIONAL DEVICES

STANDARD DEVICES

Q

GLOBAL PEX 50 Hz

D

WIRING LEGEND

FACTORY SUPPLIED LINE VOLTAGE W

IRING

FIELD SUPPLIED LINE VOLTAGE W

IRING

FACTORY SUPPLIED 24 VOLT W

IRING

FIELD SUPPLIED 24 VOLT W

IRING

CONTROL BOARD INTERNAL W

IRING - 24 VOLT MAX

WIRING AND DEVICES INCLUDED IN OPTIONS

ELECTRONIC SWITCH (TRIAC) Q1-Q18

INLINE QUICK DISCONNECT

OPEN CONTROL BOARD CONNECTION

PLUG CONNECTION ON CONTROL BOARD

PLUG CONNECTION ON FUSE BOARD

TERMINAL BLOCK CONNECTION ON CONTROL BOARD

TERMINAL STRIP CONNECTION FOR FIELD W

IRING

CIRCUIT CONNECTION TO ELECTRONICS

TRIAC GATE CONNECTION

GROUND CURRENT DETECTOR CIRCUIT

WIRE COLOR CODE

OR - ORANGE

R - RED

BR - BROWN

P - PURPLE

GN - GREEN

Y - YELLOW

BL - BLUE

BK - BLACK

NOMENCLATURE

LINE

LINE

LLBP1

LLBP2

R

BR

R

BR

CP1-A1

CP1-A2

CP2-A1

CP2-A2

RS2

RS3

ROR R

W

BR

BR

BK

BK

11-5

11-7

11-6

11-8

OPTIONAL

ROR R

W

BR

BR

BK

BK

11-1

11-3

11-2

11-4

OPTIONAL

W

W - W

HITE

BK

BL

LP1-NC

R

BR GN/Y

GN/Y

LLSV1

BR

R

W

BK

LP2-COM

HP2-NC

BL

LP2-NC

HP2-NO

HGBP2

GN/Y

LLSV2

GN/Y

HGBP2

BR

BR

BR

GY - GRAY

HS1

A B C

INFRARED HUMIDIFIER

HUM-S1

HUM-S2

HUM-S3

OR

HS1-3

HS1-2

RS3

HS1-4

HS1-1

RS1

RS2

RS1

RS2

RS2

RS3

Y GN R

CP2

HUM-A1

HUM-A2

BRRS3

RS2 RS3

RS1 RS2

RS1 RS1

LLBP1

GN/Y

HS3

AS-NO

AS-NC

MF2

BL

OL1,2,3

FC-NO

FC-C

HMV

HMV

( )

( )

INLINE BLOCK DISCONNECT

SEE NOTE5

LINE LABEL

LLSV1

BL

BL

BL

BL

1. ALL FIELD W

IRING TO BE PER LOCAL CODES. USE COPPER CONDUCTORS ONLY.

2. FAN M

OTOR OVERLOAD SYSTEM DEPENDENT ON FAN M

OTOR M

ANUFACTURER,

CONTROL VOLTAGE OVERLOAD SYSTEM SHOWN IN SHADED AREAS,

LINE VOLTAGE OVERLOAD SYSTEM SHOWN IN BOXED AREA.

4. JUMPER TO BE REMOVED W

HEN OPTIONAL COMPONENT IS USED.

5. OPTIONAL SMOKE DETECTOR: TERMINALS SUPPLIED IN FIELD W

IRING

COMPARTMENT FOR REMOTE INDICATION. FIELD TO CONNECT 24V M

AX.

9. HGBP1 IS STANDARD CONFIGURATION FOR SINGLE SYS UNITS.HGBP ARE

OPTIONAL FOR DOUBLE SYS UNITS

Q13 - HOT GAS BYPASS 1 TRIAC

H - HUMIDIFIER CONTACTOR

ELECTRIC REHEAT

RS1,2,3 - REHEAT SAFETY STATS

MISCELLANEOUS

RH2 - REHEAT STAGE 2 CONTACTOR

CCH1 - CRANKCASE HEATER NO.1

CCH2 - CRANKCASE HEATER NO.2

CP - CONDENSATE PUMP

R3 - EXTRA COMMON ALARM 24V,

3.0A M

AX CONTACT LOAD

DHV - DE HUMIDIFICATION VALVE

RAD REMOTE ALARM DEVICE

(75VA M

IN. RATING)

RSD - REMOTE SHUTDOWN DEVICE

BY OTHERS (75VA M

IN RATING)

SD - SMOKE DETECTOR

SDC - SMOKE DETECTOR CONTROL

SDT - SMOKE DETECTOR TROUBLE

AS - AIR SAFETY SWITCH

C1 - COMPRESSOR CONTACTOR 1

C2 - COMPRESSOR CONTACTOR 2

FC - FILTER CLOG SWITCH

HP1 - HIGH PRESSURE SWITCH NO.1

HP2 - HIGH PRESSURE SWITCH NO.2

HU - HUMIDITY SENSOR

K3 - COMMON ALARM RELAY 24V,

1.0A M

AX CONTACT LOAD

LLSV1 - LIQUID LINE SOLENOID 1

LLSV2 - LIQUID LINE SOLENOID 2

LP1 - LOW PRESSURE SWITCH NO.1

MF1 - MAIN FAN CONTACTOR NO.1

Q1 - REHEAT STAGE 1 TRIAC

Q2 - REHEAT STAGE 2 TRIAC

Q4 - HUMIDIFICATION TRIAC

Q5 - M

AIN FAN TRIAC

Q6 - HUMIDIFIER M

AKE-UP TRIAC

Q8 - LIQUID LINE SOLENOID 2 TRIAC

Q9 - HOT GAS BYPASS 2 TRIAC

Q10 - COMPRESSOR NO.2 TRIAC

Q12 - LIQUID LINE SOLENOID 1 TRIAC

Q14 - COMPRESSOR NO.1 TRIAC

Q15 - NOT USED

Q17 - LIQUID LINE BYPASS 2 TRIAC

TH - TEMPERATURE SENSOR

T1 - UNIT CONTROL TRANSFORMER

T2 - ISOLATION TRANSFORMER

U1-U30 - OPTO ISOLATORS

LLBP1 - LIQUID LINE BYPASS 1

LLBP2 - LIQUID LINE BYPASS 2

LP2 - LOW PRESSURE SWITCH NO.2

Q3 - DEHUMIDIFICATION TRIAC

/ CGV ACTUATOR OPENING TRIAC

HGBP1-HOT GAS BYPASS 1(single sys)

HGBP2 - HOT GAS BYPASS 2(dual sys)

HMV - HUMIDIFIER M

AKE-UP VALVE

HS3 - MANUAL RESET HUMIDIFIER

HWA - HIGH W

ATER ALARM

SAFETY(UNDER PAN)

ECON-O

-CYCLE

K11 - ECON-O

-COIL RELAY

ECON-O

-COIL

37

72

61

15

70

59 2 11

65

52

43

44

47

15

14

52

55

61

65

67

72

63

30

31

BR - BACKUP REHEAT CONTACTOR

LPT1 - LOWPRESSURE TRANSDUCER1

LPT2 - LOWPRESSURE TRANSDUCER2


CT - CURRENT TRANSFORMER

70

59

18

20

41

31

2 4 8 43

36

55

47

14 48

15

64

38

39

67

55

44

23

30

33

30

68

58

21

15

67-1

67-6

TH/HU

42

41

ANALOG

INPUTS #1

BKR

12-1

12-2

44

43

ANALOG

INPUTS #2

BKR

12-5

12-6

61-1

INTELLISLOT 1

61-8

65-1

65-4

INTELLISLOT 2

OR

OR

OR2RH2

3RH2

L1

L2

L3

OR1RH2

OR

P

21

CT

ELECTRIC REHEAT 2

41

STANDARD DEVICES

LINE

MF3

GN/Y

LLBP2

/ CGV ACTUATOR CLOSING TRIAC

Q18 - LIQUID LINE BYPASS1 TRIAC

30


22

RS1

GN/Y

BR

P P

MFAS

P P

2CPAR

P P

REMOTE LIQUITECT

SEE NOTE 6

95

94

85

84

89

88

SEE NOTE 8

RSD3

RSD2

RSD1

37C

38C37B

38B

37

38

OR

OR

OR

REMOVE FOR EXTRA RSD TERMINALS

SEE NOTE 4

OR

OR

70

65

65

70

CPAR

LQR

R

P

R

P

1CPAR

BR

BR

SEE NOTE 4

1LQR

BR BR

BR

T8

U24

33-7

U27

33-6

SDT

PCPSS

EM1 - EMERGENCY POWER

LOCKOUT RELAY

LQR - LIQUITECT SHUTDOWN RELAY

MFAS - M

AIN FAN AUXILIARY SIDE

CPAR - CONDENSATE PUMP ALARM

CPSS - CONDENSATE PUMP SAFETY

SWITCH

SWITCH

RELAY

7. OPTIONAL EMERGENCY POWER LOCKOUT OF REHEAT AND/OR HUMIDIFIER:

CONNECTIONS PROVIDED FOR REMOTE 24V AC SOURCE.

8. OPTIONAL CONDENSATE PUMP ALARM RELAY TERMINALS LOCATED IN W

IRING

COMPARTMENT FOR REMOTE INDICATION.

6. OPTIONAL M

AIN FAN AUXILIARY SIDE SWITCH: TERMINALS LOCATED IN FIELD

WIRING COMPARTMENT FOR REMOTE INDICATION. FIELD TO CONNECT 24V M

AX.

INDICATOR

A

16

26

19

28

23

GCD - GROUNDED CURRENT

37

RBR

OL2

OR

OR

OR

OR4MF1

4MF2

4MF3

OL1

OL3

OR

SEE NOTE 2

4RH1

DLT1-COM

DLT1

DLT2

RS5

RS6

RS6

RS5 RS6

RS4 RS5

RS4

RS4

RS4

BR

LLSV2

DHV

LLSV2

HGBP2

HGBP2

HGBP2

HP2-COM

LLSV1

LLSV1

LLSV1

HGBP1

HGBP1

HGBP1

HGBP1

HP1-NC

HP1-NO

HP1-COM

LP1-COM

P P P P

59

58

83

82

SEE NOTE 7

2LQR

2MF1,2,3

3MF1,2,3

P P3R3

97

96

2R3

HEAT REJECTION

DEVICE

CONNECTION

SEE NOTE 11

1R3

LLBP2

LLBP2

LLBP1

LLBP1

LLBP1

LLBP2

WUF

R BR5C1

70

71

R BR5C2

70A

R BR

K11

72

7371A

11. k11 RELAY CONTACTS HAVE SEPARATE TERMINALS M

ARKED 72 AND 73 ON DUAL

COOL

BR

DHV

DHV

DLT1-NO

DLT2-COM

DLT2-NO

RH1 - REHEAT STAGE 1 CONTACTOR

41

HS1 - AUTO RESET TEMPERATURE

41

SAFETY SWITCH

DLT1 - DISCHARGE LINE

68

57

TEMPERATURE SWITCH

DLT2 - DISCHARGE LINE

TEMPERATURE SWITCH

DETECTOR

HGBP1 - HOT GAS BYPASS 1(dual sys)

67

WUF - W

ATER UNDER FLOOR

22

10. LLSV IS ONLY OPTIONAL FOR LONG PIPE APPLICATION AS ONE OF THE

SEE NOTE 9

SEE NOTE 9

SEE NOTE 10

SEE NOTE 10

SEE NOTE 12

12. A DUAL HEAT REJECTION DIVICE APPLY TO DOUBLE SYS UNITS

NEED TO

CONNECT 70 TO 70A AND TO CONNECT 71 TO 71A

TERMINAL 70 AND 71

LLSV2

EM1

3. LLBP IS ONLY FOR W

ATER COOLED UNIT W

ITH BRASED PLATE HEAT EXCHANGER

SEE NOTE 3

5

BR

4RH2

BR

R34-3

34-1

BR

24DH

24DG

RR

24H

24G

R

R

OPTIONAL W

ITH GCD

1-8

Q1

Q2

Q3

Q4

LPT2

UNIT DISPLAY

LLBP

COMPONENTS OF EXTENSION KITS

K11

ARE USED OR 70A AND 71A ARE USED

23,23

43,49

17,19,66,67,68

17,19,66,67,68

17,19,66,67,68

22,24,27

14,21

21,22

25,56,57,58

26,61,62,63

41,42,43

14,36,39,50,51,52

18

BK

BK

CP1

RC1,2

L2

R R

SEE NOTE 1&5

GCD

INTELLISLOT

POWER SUPPLY

INTELLISLOT

40-13

40-12

40-13

40-14

40-15

32-12

32-10

LPT1

SEE NOTE 13

13. OPTIONAL SITESCAN SYETEM KIT, CONNECT AT TERMINALS 77 AND 78

32-11

GN/Y-INSUL ATION COLOR&TRACER COLOR

40-11

40-10

34-11

34-10

34-12

AS

32-13

36-10

Figure 4 Circuit diagram

Appendix 3 Menu Structure Of Microprocessor 82


Appendix 3 Menu Structure Of Microprocessor

User Menus

SETPOINTS

EVENT LOG

SET ALARMS

SENSOR DATA

DISPLAY SETUP

TOTAL RUN HRS

SLEEP MODE

U102

TEMP SET

U103

HUM SET

U104

HUM CTRL

U105

SUP LIM

U106

SUP TEMP

U202

RTN SNSR

U203

HI TEMP

U204

LO TEMP

U205

HI HUM

U206

LOW HUM

U207

SENSOR A

U208

HI TEMPA

U209

LO TEMPA

U210

HI HUM A

U211

LO HUM A

U302

HUM A

U303

TEMP B

U304

HUM B

U305

TEMP C

U306

HUM C

U307

FC TEMP

U308

AMB TEMP

U309

FC STATE

U310

DS1 TEMP

U311

DS2 TEMP

U301

TEMP A

U313

Hi Te M

U313

Hi Te S

U313

Hi Temp

U314

Lo Te H

U314

Lo Te M

U314

Lo Te S

U314

Lo Temp

U315

Hi Hu H

U315

Hi Humi

U316

Lo Hu H

U313

Hi Te H

U316

Lo Hu M

U316

Lo Hu S

U316

Lo Humi

U402

YEAR

U402

MONTH

U402

DAY

U403

HOUR

U403

MINUTE

U403

SECOND

U404

TEMP F/C

U405

CONTRAST

U406

BUZ FREQ

U406

BUZ TEST

U401

LANGUAGE

U407

BACKLITE

U408

SCREEN

U409

SHOWS

U410

DISPLAY

U411

DATE

U502

LIMIT

U503

COMP1

U503

LIMIT

U504

COMP2

U504

LIMIT

U505

CW/FC

U505

LIMIT

U506

HG / HW

U506

LIMIT

U507

EL HEAT1

U502

MOTOR(S)

U507

LIMIT

U508

EL HEAT2

U508

LIMIT

U509

EL HEAT3

U509

LIMIT

U510

HUM

U510

LIMIT

U511

DEHUM

U511

LIMIT

U602

TUE

U602

WED

U602

THU

U602

FRI

U602

SAT

U605

START 1

U605

START 1

U605

STOP 1

U605

STOP 1

U607

START 2

U602

MON

U607

START 2

U607

STOP 2

U607

STOP 2

U609

TIME MOD

U610

TIME TYP

U611

DEADBAND

U602

SUN

GRAPHICS

SERVICE INFO

ACTIVE ALARMS

U107

BACK TSP

Figure 5 User menu structure

Appendix 3 Menu Structure Of Microprocessor 83


SERVICE MENUS

SETPOINTS

STANDBY SETTINGS

WELLNESS BASIC1

DIAGNOSTICS

SET ALARMS

CALIBRATION

S102

TEMP SET

S103

CTRL TYP

S104

TEMP PB

S105

TEMP INT

S106

TEMP DER

S502

#STANDBY

S503

ROTATION

S504

ROT HOUR

S505

ROT MIN

S506

ROT BY

S507

DO ROT

S508

CASCADE

S509

STBY HT

S003

BONUS

S004

PENALTY

S005

LAST PM

S005

LAST PM

S005

LAST PM

S006

NAME

S007

CONFIRM

S008

NEXT PM

S013

STARTS

S014

RUN HRS

S002

FREQ/YR

S016

BEST

S017

WORST

S018

ALARMS

S019

BONUS

S024

STARTS

S025

RUN HRS

S026

AVG RUN

S027

BEST

S028

WORST

S029

HP AL

S015

AVG RUN

S030

LP AL

S031

OL AL

S032

DS HT AL

S033

BONUS

S035

STARTS

S036

RUN HRS

S303

HP2 CODE

S304

HT1 CNT

S305

S306

HT2 CNT

S307

LP2 CODE

S313

MANUAL

S314

MOTOR(S)

S315

COMP1

S315

S302

HP1 CODE

S316

C1 CAP

S317

C1 CYCLE

S318

LLSV 1

S319

COMP2

S319

C2 MODE

S203

HI TEMP

S204

LO TEMP

S205

HI HUM

S206

LOW HUM

S207

SENSOR A

S208

HI TEMPA

S209

LO TEMPA

S210

HI HUM A

S211

LO HUM A

S213

CUST IN1

S202

RTN SNSR

S214

C1 ACT

S215

CUST IN2

S216

C2 ACT

S217

CUST IN3

S218

C3 ACT

S219

CUST IN4

S220

C4 ACT

S221

WA AC AL

S222

AL.RES.

S603

CAL TEMP

S604

RTN HUM

S605

CAL HUM

S606

DS1 NTC

S607

CAL DS1

S609

CAL DS2

S613

TEMP A

S614

CAL A

S615

HUM A

S616

CAL A

S602

RTN TEMP

S617

TEMP B

S618

CAL B

S619

HUM B

S620

CAL B

S624

FC SNSR

S625

S608

DS2 NTC

S107

AUTOSET

S108

TEMP DB

S109

2ND SETP

S110

BACK TSP

S113

HUM SET

S114

HUM CTRL

S115

HUM PB

S116

HUM INT

S119

LO LIM 2

S124

SUP LIM

S125

SUP TEMP

S126

AMB TYPE

S127

AMB DT

S128

FC TYPE

S129

FC DT

S130

MIN CW

S037

AVG RUN

S038

BEST

S321

C2 CYCLE

S322

LLSV 2

S324

EL HEAT1

S325

EL HEAT2

S326

EL HEAT3

S328

LWD Val

S329

HUM FILL

S330

HUM

S331

H DRAIN

S332

HUM.C.

S320

C2 CAP

S333

LSI

S335

ALM REL

S336

FC REL

S337

3P OPEN

S338

3P CLOSE

S340

BV CTRL

S341

ANALOG1

S342

ANALOG2

S343

ANALOG3

S344

ANALOG4

S345

RSD

S346

AIR LOSS

S347

MOTOR OL

S348

FILTER

S349

CUSTOM 1

S350

CUSTOM 2

S351

CUSTOM 3

S352

CUSTOM 4

S353

HEAT SAF

S354

FLOW AT

S355

FLOW ACT

S626

S627

SUP SNSR

S628

SUP TEMP

S629

CAL SUP

S630

TEMP C

S631

CAL C

S632

HUM C

S633

CAL C

NETWORK SETUP

S803

TEAMWORK

S809

CS CTRL

S809

CS STAT

S810

NW CTRL

S813

IP #1

S813

IP #2

S813

IP #3

S813

S814

NM #1

S802

# UNITS

S814

NM #2

S814

NM #3

S814

NM #4

S815

GW #1

S815

GW #2

S815

GW #3

S810

NW STAT

S815

S817

U2U PROT

S818

U2U ADD

S821

BL CTRL

S821

BL STAT

S824

MON ADD

S831

CS CTRL

OPTIONS SETUP

S403

LP DELAY

S404

LP1 ACT

S405

LP2 ACT

S406

EL HEAT

S407

HW HEAT

S409

LWDconn

S410

3P RUN

S411

3P DIR

S413

HUM ENAB

S414

IR FLUSH

S402

COMP SEQ

S415

HUMSTEAM

S416

HUM.TIM

E

S417

HUM.MAN

S418

DEHUM EN

S419

REST EN

S420

RESTART

S408

ALL HEAT

S421

ONOFF EN

S424

CW FLUSH

SERVICE INFO

S117

HUM DB

S118

LO LIM 1

FC SNSR

CAL FC

S819

U2U GRP

S049

BEST

S050

WORST

S051

ALARMS

S052

BONUS

S057

STARTS

S058

RUN HRS

S059

AVG RUN

S060

BEST

S061

WORST

S062

ALARMS

S063

BONUS

S068

STARTS

S069

RUN HRS

S070

AVG RUN

S071

BEST

S072

WORST

S073

ALARMS

S074

BONUS

S079

STARTS

S080

RUN HRS

S081

AVG RUN

S082

BEST

S083

WORST

S084

ALARMS

S085

BONUS

S131

MIN CW

S135

FANSPEED

S136

VSD SET

S137

VSD MIN

S138

VSD DEH

S139

VSD NOP

S146

CTRLTYPE

S147

CO1 ON

S148

CO1 OFF

S149

CO1 TD

S150

CO2 ON

S151

CO2 OFF

S152

CO2 TD

S153

CYCLET

S154

SCRFACT

S155

ACT SCR

LP1 CODE

C1 MODE

S356

HP1

S357

LP1

S358

C1 OL

S359

HP2

S360

LP2

S361

C2 OL

S367

HUM PROB

S368

DT1

S369

DT2

S370

DT3

S371

MIN CW

IP #4

GW #4

S832

NW STAT

S835

MON PROT

S836

IP #1

S836

IP #2

S832

NW CTRL

S831

CS STAT

S836

S837

NM #2

S837

NM #3

S837

NM #4

S838

GW #1

S837

NM #1

S836

IP #4

IP #3

S838

GW #4

S840

U2U PROT

S841

U2U ADD

S842

U2U GRP

S838

GW #3

S838

GW #2

S843

BL CTRL

S844

SR STAT

S844

SR CTRL

S843

BL STAT

S425

FC FLUSH

S426

HW FLUSH

S427

BALL OFF

S039

WORST

S040

HP AL

S041

LP AL

S042

OL AL

S043

DS HT AL

S044

BONUS

S046

STARTS

S047

RUN HRS

S048

AVG RUN

Figure 6 Maintenance menu structure

Documents

Liebert PEX User Manual