FRDS GENII Maintenance and Troubleshooting Manual · 2015. 5. 23. · FRDS GENII FEATURES ... lets the pilot select the volume of agent released during a dump. This enables “split

of 51 Document# 9001-0011 TROTTER CONTROLS, INC.

Revision C, 6/1/2009 FORT WORTH, TX

FRDS GENII Maintenance and Troubleshooting Manual __________________________________________________________________

Trotter Controls, Inc. Document# 9001-0011

Revision C, 6/1/2009

____________________________________________________________________________________________________

TROTTER CONTROLS, INC. Document# 9001-0011 Page 2 of 51

FORT WORTH, TX Revision C, 6/1/2009

Table of Contents REVISIONS ...............................................................................................................................................................................5

OVERVIEW...............................................................................................................................................................................6

INTRODUCTION ........................................................................................................................................................................6 FRDS GENII FEATURES..........................................................................................................................................................6

Accurate and dependable coverage delivery......................................................................................................................6 Highly reliable specific purpose control system – Reliability FIRST.................................................................................7 Redundant Systems to Insure Door Opening......................................................................................................................7 Hydraulic system refinements ............................................................................................................................................7 Benefits...............................................................................................................................................................................8

CONSTANT FLOW RATE VERSUS CONSTANT GATE ANGLE .....................................................................................................8 Constant Gate Angle Delivery Systems ..............................................................................................................................8 Constant Flow Rate Delivery Systems................................................................................................................................9

SYSTEM DESCRIPTION ...........................................................................................................................................................10 MODES OF OPERATION ..........................................................................................................................................................12

PILOT INTERFACE DETAILS ............................................................................................................................................13

FOAM GALLONS DISPLAY ................................................................................................................................................14

AUTO MODE OPERATION .................................................................................................................................................14

SWITCH FUNCTIONS IN AUTO/TIMER MODE ......................................................................................................................14 DUAL ARMED LIGHT FUNCTIONALITY (AUTO/TIMER MODES) ..........................................................................................15

TIMER MODE OPERATION ...............................................................................................................................................18

SPECIAL USES OF PANEL SWITCHES (AUTO/TIMER MODES)...............................................................................20

LAMP TEST switch ..........................................................................................................................................................20 NO switch .........................................................................................................................................................................20 RUN PUMP switch ..........................................................................................................................................................20

SPECIAL MODES OF OPERATION (AUTO/TIMER) .....................................................................................................20

FUEL FERRY MODE................................................................................................................................................................20 PILOT INTERFACE “MIRROR” MODE.......................................................................................................................................21

Enabling/Disabling Mirror Mode ....................................................................................................................................21 Activating Mirror Mode ...................................................................................................................................................22 De-activating Mirror Mode..............................................................................................................................................22

BRIGHTNESS ADJUST MODE ...................................................................................................................................................22 FOAM INJECTION ...................................................................................................................................................................22

MANUAL MODE OPERATION...........................................................................................................................................23

SALVO SYSTEM ACTIVATION .........................................................................................................................................23

AUTOMATIC SALVO ACTIVATION ..........................................................................................................................................24 PILOT ACTIVATED SALVO......................................................................................................................................................24 AUTO SUPERVISOR ACTIVATED SALVO .................................................................................................................................24 MAN SYSTEM ACTIVATED SALVO ........................................................................................................................................25 RECOVERY FROM AN AUTOMATIC SALVO CONDITION ..........................................................................................................25

SYSTEM TESTS .....................................................................................................................................................................26

SYSTEM SELF DIAGNOSTIC TESTS – SYSTEST MENU .............................................................................................26

PILOT (NO DOORS) – SYSTEM TEST ........................................................................................................................................27 PILOT (ALL) – SYSTEM TEST ................................................................................................................................................27 AUTO SALVO – SYSTEM TEST................................................................................................................................................28 MAN SALVO – SYSTEM TEST .................................................................................................................................................28



MAINT SYSTEST – MAINTENANCE PERSONNEL – SYSTEM TEST............................................................................................28 SYSTEM TEST PERSISTENT ERRORS .......................................................................................................................................29

Clearing Persistent SysTest Errors ..................................................................................................................................29 MENU SYSTEM.......................................................................................................................................................................30

Main Menu...................................................................................................................................................................................... 30 Maint Menu .................................................................................................................................................................................... 30 Config Menu................................................................................................................................................................................... 31 SysTest Menu ................................................................................................................................................................................. 31 Error History................................................................................................................................................................................... 31 Digital Inputs .................................................................................................................................................................................. 32 Digital Input Map............................................................................................................................................................................ 32 Digital Outputs................................................................................................................................................................................ 33 Digital Output Map......................................................................................................................................................................... 33 Analog Inputs.................................................................................................................................................................................. 34 Analog Calibrate ............................................................................................................................................................................. 34 Err Msg Index/Counts..................................................................................................................................................................... 34 Clear Errors..................................................................................................................................................................................... 35 Clear Err Counts ............................................................................................................................................................................. 35 Clear ErrHistory.............................................................................................................................................................................. 35 System Reset................................................................................................................................................................................... 35 Save Memory.................................................................................................................................................................................. 35 Read EEprom.................................................................................................................................................................................. 36 Compare RAM/EE.......................................................................................................................................................................... 36 Logo/Version .................................................................................................................................................................................. 37 Leakage Table................................................................................................................................................................................. 38 System Operation Parameters (Tweak)........................................................................................................................................... 38

ERROR OVERVIEW .................................................................................................................................................................40 Reduced Accuracy .......................................................................................................................................................................... 41

Error Code Displayed: 112_Accuracy Loss.............................................................................................................................. 41 Reduced Redundancy (AUTO/TIMER mode only)........................................................................................................................ 42

Error Code Displayed: 114_Redundancy Loss .......................................................................................................................... 42 Reduced Accuracy & Redundancy (AUTO/TIMER mode only).................................................................................................... 42

Error Code Displayed: 113_Accur+Redun Loss....................................................................................................................... 42 Clearing Pump Errors ..................................................................................................................................................................... 42

SETTING SYSTEM PREFERENCES ..................................................................................................................................43

MAINTENANCE.....................................................................................................................................................................43

FUSE, RELAY, & STATUS LED LOCATION AND FUNCTION ....................................................................................................43 PREVENTATIVE MAINTENANCE SCHEDULE ...........................................................................................................................48 CALIBRATION & SETUP .........................................................................................................................................................48 MANAGING MEMORY ............................................................................................................................................................49 UPDATING SYSTEM FIRMWARE .............................................................................................................................................49

REFERENCE DOCUMENTS................................................................................................................................................50

MANUALS ..............................................................................................................................................................................50 9001-0012 – FRDS GENII Operators Manual, Trotter Controls, Inc. .......................................................................................50

TECHNICAL PUBLICATIONS & TEST SPECIFICATIONS ............................................................................................................50 TP-1000 – Constant Flow Rate Vs. Constant Gate Angle, Trotter Controls, Inc. ........................................................................50 TP-1002 – FRDS GENII System Description, Trotter Controls, Inc. .........................................................................................50 TS-0005 FRDS GENII Maintenance System Tests, Trotter Controls, Inc. ..................................................................................50

ENGINEERING REPORTS .........................................................................................................................................................50 ER-0074 GENII FRDS System Operation Parameters, Trotter Controls, Inc. ............................................................................50 ER-0075 FRDS GENII System Error Codes and Resolution, Trotter Controls, Inc. ....................................................................50 ER-0077 Preventative Maintenance Schedule, Trotter Controls, Inc. ........................................................................................50

PROCESS SPECIFICATIONS......................................................................................................................................................50 PS-0030 – FRDS GENII – Pressure Relief Valve Adjustment, Trotter Controls, Inc....................................................................50 PS-0031 Hopper Contents and Gatebox Sensor adjustment, Trotter Controls, Inc. .....................................................................50 PS-0032 Calibration Dumping Matrix, Trotter Controls, Inc. ..................................................................................................50



PS-0033 – Hydraulic Flushing Procedure, Trotter Controls, Inc. .............................................................................................50 PS-0035 – FRDS GENII – Memory Management, Trotter Controls, Inc. ...................................................................................50

PRODUCT DATASHEETS .........................................................................................................................................................50 DS-0001 Datasheet – Pilot Interface FRDS GENII, Trotter Controls, Inc. ................................................................................50 DS-0002 Datasheet – Relay Enclosure FRDS GENII, Trotter Controls, Inc. ..............................................................................50 DS-0003 Datasheet – Side Loader Gage FRDS GENII, Trotter Controls, Inc. ...........................................................................50

DRAWINGS.............................................................................................................................................................................50 51625 SH.12 & 13 – Instrument Installation – Upper Panel (802F), Snow Engineering Co.........................................................50 52650 SH.1 – Instrument Installation – Upper Panel (1002F), Snow Engineering Co. ................................................................50 60513 - Assy – Gatebox Electrical, Snow Engineering Co. .............................................................................................................51 60441 SH.10 – Control System Wiring Schematic (802F), Snow Engineering Co. ......................................................................51 60441 SH.21 – Control System Wiring Schematic (1002F), Snow Engineering Co. ....................................................................51 61566 SH.1 – Installation - Relay Box – FRDS (1002F), Snow Engineering Co. ........................................................................51 61566 SH.2 – Installation - Relay Box – FRDS (802F), Snow Engineering Co. ..........................................................................51 61567 SH.1 - Installation - Multibox – FRDS (1002F), Snow Engineering Co............................................................................51 61567 SH.2 - Installation - Multibox – FRDS (802F), Snow Engineering Co. ............................................................................51 61572 SH.1 – Assy - Relay Box – FRDS (802F & 1002F), Snow Engineering Co. ......................................................................51 61574 - Cable Assy. – Valve to Multibox, , Snow Engineering Co. .................................................................................................51 61587 - Pilot Interface – GEN II FRDS", Snow Engineering Co. ..............................................................................................51 80442 SH.4 – Float Installation – Hopper (802F), Snow Engineering Co..................................................................................51 80493-1 - Assy - Gatebox Actuator, Snow Engineering Co. ............................................................................................................51 80504 SH. 10 - Hydraulic Schematic (802F), Snow Engineering Co. ........................................................................................51 80504 SH. 21- Hydraulic Schematic (1002F), Snow Engineering Co. .......................................................................................51 80577 SH.13 & 14 – Hydraulic System Installation (802F), Snow Engineering Co. ....................................................................51 80577 SH.21 & 22 – Hydraulic System Installation (1002F), Snow Engineering Co. ..................................................................51 80628 SH.2 – Installation – Hopper Fill Gauge (1002F), Snow Engineering Co. .......................................................................51 80628 SH.3 – Installation – Hopper Fill Gauge (802F), Snow Engineering Co. .........................................................................51 81424, Sheet 2 - Installation-Hydraulic Manifold-802, Snow Engineering Co.....................................................................................51 81759 - Fitting Assy, Hydraulic Tank, Snow Engineering Co. .........................................................................................................51 83222 SH.1 – Hydraulic Manifold Assy Fire Gate (802F), Snow Engineering Co................................................................................51 83222 SH.21 – Hydraulic Manifold Assy Fire Gate (1002F), Snow Engineering Co. ..................................................................51 83224 - Assy, Hydraulic Pump, Snow Engineering Co...................................................................................................................51 83230 - Filter Assy, Hydraulic System, Snow Engineering Co. ........................................................................................................51 83118 - Float Installation – Hopper (1002F), Snow Engineering Co.........................................................................................51 80493 SH.4 – Assembly – Gatebox Actuator (sensor assy) (802F), Snow Engineering Co. ..........................................................51 83056 SH.2 – Installation – Gatebox Actuator (sensor assy) (1002F) , Snow Engineering Co......................................................51



Revisions

Revision C: 6/1/2009

€ Added revisions section to track changes made

€ Updated AUTO/MAN cheat sheet photos € Added additional drawings to include references included in TC document

ER-0077 € Added section for setting power on preferences for AUTO / TIMER mode



Overview

This document includes maintenance, troubleshooting, and other information in addition to

items needed for basic operation of the system.

A list of the reference documents used to support this manual is included at the end of the

manual and in the table of contents.

The reader is encouraged to refer to Trotter Controls Document# 9001-0012 for condensed

FRDS system operation instructions.

Introduction

The Fire Retardant Delivery System or FRDS enhances the capability of the aircraft to fight

grass fires and forest fires by providing computer control over the release of fire retardant

agent from the hopper. The FRDS allows the pilot to select the most effective concentration

or coverage of agent over the ground, which varies with the type and size of fire. It also

lets the pilot select the volume of agent released during a dump. This enables “split load”

operations.

A second generation FRDS or GEN II system is now available and is being installed in AT-

802/802A aircraft. The GEN II system is an advancement of the original GEN I FRDS and

provides improved delivery accuracy, increased component reliability, and hydraulic system

refinements.

FRDS GENII Features

Based on over 15 years of field experience with the first generation FRDS system, Air

Tractor has developed a completely new FRDS system designed from the ground up for

reliability, performance, and maintainability.

The focus of the FRDS GENII ground up re-design was to eliminate failures due to vibration,

humidity, and hydraulic system failures as well as the provide state of the art built in

diagnostic features.

Some of the enhancements over the first generation FRDS product are described below.

Accurate and dependable coverage delivery

� Improved flow control and gallonage delivered accuracy

� Improved door speed

� New advanced leakage compensation algorithms delivers ACCURATE split load

operation



Highly reliable specific purpose control system – Reliability

FIRST

� Hardened against vibration and humidity

� Dual microprocessor (µP) and electro-mechanical backup automatic salvo systems

o Redundant Automatic Salvo system ensures door opening

� Fully sealed digital side loader displays sealed to IP67

� New non-contact hopper contents sensor

� New non-contact gatebox position sensor

� Water proof connectors with IP67 rating

� Pilot and Maintenance Friendly

� “Black Box” or cable change out/swap program

� Advanced Vacuum Fluorescent Text/Graphics Display

� Built in system status, diagnostics & messaging

o Stuck valve detection

o Bad switch detection

o Broken wire detection

o Open or missing valve coil detection

o Bad sensor detection

o Blown fuse detection

o Voltage monitoring

o Built in test / diagnostics feature

Redundant Systems to Insure Door Opening

� Three independent systems are provided to ensure the doors open when

expected.

Hydraulic system refinements

� Hydraulic pump package – Highly

reliable

o Dual head 93% efficient

hydraulic pump

o Lower electrical current

requirements than GENI systems

o Heavy duty DC motor

o Inlet filter on pump eliminates

contaminates

o Tested for over 10,000 flight

hours in a 160F controlled

environment with no failure

� No servo valve – three low cost, dirt tolerant directional valves are used.

� Three valves offer three levels of redundancy when opening doors

� Independent pressure switch (electro-mechanical system) and pressure

sensor (µP system) are used to control the pump for added mission

reliability



Constant Gate Angle Vs. Constant Flow Control (Coverage Level 2.0)

0.00

0.50

1.00

1.50

2.00

2.50

3.00

3.50

4.00

0.0 100.0 200.0 300.0 400.0 500.0 600.0

Ground Line (feet)

Co

ve

rag

e L

ev

el

(ga

ls/1

00

SF

T)

Constant Gate Angle Constant Flow Control

Benefits

� System is highly reliable

� System is highly repeatable

� System offers three modes of operation

� System has three levels of redundancy on door opening command

� System is very easy to install and set up

� System is easy to operate

� Lower cost of ownership

� System is self diagnosing

� “Black Box” swap out

� Minimal training required for troubleshooting and maintenance

Constant Flow Rate Versus Constant Gate Angle

The flow rate of retardant from the hoppers has been shown to be proportional to

the coverage level seen on the ground pattern. It follows that the primary goal of

the retardant delivery system is to maintain a constant flow rate from the hoppers

throughout the delivery.

Constant angle and constant flow delivery operation are briefly discussed in the

following sections.

Trotter Controls Document# TP-1000 (included in the reference materials) provides

details regarding the clear advantages of constant flow (coverage) retardant delivery

as opposed to the less accurate constant gate angle delivery method used on less

sophisticated systems.

Constant Gate Angle Delivery Systems

Some retardant delivery systems open the gatebox doors to a fixed angle throughout

the delivery then close when a preset amount of time has elapsed. These systems

allow split load operation and a coarse method of delivering the retardant at different

flow rates.

Constant gate angle systems are simple to design and construct since the only

requirement is to open the door to a

fixed angle for a given amount of

time. This method is inexpensive to

engineer and produce but does not

have the ability to accurately control

the flow rate produced by the system

as the level of liquid retardant and

acceleration forces on the aircraft

vary during the delivery process.

Typically one timer is used to control

how wide the doors open (a crude coverage control), and another timer is used to

control how long the doors remain open (controls the amount of retardant

delivered).



Constant gate angle systems will produce a ground pattern that is too heavy at the

onset of retardant delivery and is too light at the end of the delivery.

These systems do not use retardant nearly as effectively as constant flow rate

delivery systems.

When the MODE switch is set to TIMER, the FRDS GENII system offers constant gate

angle. The main advantage of this mode is that almost no sensors are using during

TIMER mode operation thus allowing FRDS operation in the event of a hardware

failure that prevents operation in AUTO mode.

Constant Flow Rate Delivery Systems

Constant flow rate delivery systems are more expensive to design and construct

since the system must monitor various parameters during the retardant delivery and

control the gatebox doors in a way to maintain constant flow rate.

These systems control the position of the gatebox doors to effectively maintain

constant flow rate during retardant delivery operations.

Constant flow rate delivery systems will produce a superior ground pattern that is

consistent throughout the delivery. These systems optimize the use of retardant

during delivery operations and assure that the correct coverage level is maintained

until just before the retardant tanks are empty.

The FRDS GENII system operates in constant flow mode when the mode switch is in

the AUTO position.

Trotter Controls Document# TP-1000 shows that the constant gate angle system’s

(CGA) retardant utilization efficiency is only 65% as efficient as the more

sophisticated constant flow rate delivery system for a 2.0 coverage delivery. At a

coverage level of 0.5, the constant gate angle system is only 53.6% as efficient as

the constant flow system.

The bottom line is that the constant flow system will deliver longer ground line for a

given amount of retardant delivered.

CONSTANT FLOW = MAXIMUM GROUND LINE PER GALLON OF RETARDANT

Utilization of constant flow rate delivery systems drastically improves the ability of a

given aircraft and pilot to suppress fires due to the constant coverage delivered and

longer ground lines that can be produced with a given amount of available retardant.



System Description

The FRDS GENII system is comprised of the basic primary elements:

� A hydraulic actuator to open and close the gatebox doors used to meter

retardant flow rate.

� Hydraulic valves to control the flow of oil to and from the actuator.

� Sensors to sense various parameters needed by the control system.

� A relay enclosure to provide high power relays and drivers needed to operate

the hydraulic valves and provide various voltages. This enclosure also houses

a redundant electro-mechanical system.

� A pilot interface containing a graphic/text display, switches, accelerometers,

and the primary microprocessor used to control the system. This is the

primary interface for the pilot to control and interact with the system.

The reader is encouraged to refer to Trotter Controls Document#TP-1002 for a

detailed description of the system. The electrical schematic (Snow Engineering

drawing 60441) and the hydraulic schematic (Snow Engineering Drawing 80504)

provide specific details on the how the system is connected.

The FRDS GENII operators manual (Trotter Controls Document #9001-0012)

provides an abreviated description and operation details from the pilot’s perspective.

An overview of the system is shown in Figure 1.



Figure 1 ~ FRDS GENII system overview.



Modes of Operation

There are several modes of operation for the FRDS GENII system. The operation mode is

selected using the MODE switch on the pilot interface. There is a hydraulic power switch

(HYD PWR) and a separate mode switch with three positions (AUTO, TIMER, MAN).

The various operation modes for the system are listed below.

� Automatic Mode (AUTO) – In this mode, the microprocessor controlled primary

system automatically controls the flow rate and quantity delivered using various

sensors and valves.

� Timer Mode (TIMER) – In this mode, two timers and minimal sensors and valves are

used to control the doors. One timer adjusts how long the doors move towards the

open position (adjusts door angle) and a second timer adjusts how long the doors

remain in a fixed position before closing. The doors are maintained in fixed position

throughout the delivery.

� Manual Mode (MAN) – In this mode, the backup manual system (separate from the

primary AUTO system) opens and closes the gatebox doors using simple directional

valves. The flow rate and quantity captured are not controlled. This mode is used to

manually operate the gatebox doors and as a backup system for the AUTO system.

The doors are opened to full open or full closed in this mode using directional control

valves.

The operation mode is selected using the MODE switch on the pilot interface. The various

modes for the system are shown below.



Table 1 ~ FRDS Operation Modes during normal operation.

Power

Sw

Armed

Sw

Mode

Sw

System State / Mode

OFF X X Display Active, No pressure available to hydraulics, no pressure in

system

ON OFF X Display active, pressure available to hydraulics, no power available to

valves to cause actuator motion, pressing fire switch has no effect

ON ON AUTO Automatic control, power to hydraulics, depressing fire switch initiates

delivery

€ Constant flow rate

€ Microprocessor Auto Salvo and Electro-mechanical Auto Salvo

Active

€ The gatebox door position is controlled in a way to maintain

constant retardant flow rate during delivery

€ Pump is controlled by the primary auto system and hydraulic

pressure sensor

ON ON TIMER Timer based control of doors, power to hydraulics, depressing fire

switch initiates delivery

€ Microprocessor Auto Salvo and Electro-Mechanical Auto Salvo

Active

€ Timer settings control the gatebox door position during delivery

€ Pump is controlled by the primary auto system and hydraulic

pressure sensor

€ No sensors except pressure sensor required for operation

€ The AUTO SALVO system uses the gate open sensors

ON ON MAN Electro-mechanical control, power to hydraulics, depressing fire switch

initiates delivery

€ Electro-Mechanical Auto Salvo Active Only

€ Pressure Switch Controls Pump

€ Doors @ full open or full close only

€ Gatebox door position is not automatically controlled by the

system during delivery

€ Pump is controlled by a pressure switch and relay. Pump

operation cannot be disabled by the system in the event of an

error in this mode.

€ The AUTO SALVO systems are not active = NO

REDUNDANCY

Pilot Interface Details

The pilot interface is comprised of graphics / text display and various switches used by the

pilot or maintenance crew to control system operation.



Foam gallons display

The pilot interface displays the current gallons left in the foam reservoir. The gallons

displayed can range from 3 to 18 gallons. Due to the mechanical limitations of the foam

tank sensor, 3 gallons is the minimum that can be displayed.

Auto Mode Operation The functionality of the switches when the system is in AUTO or TIMER mode is summarized below.

Switch Functions In AUTO/TIMER Mode

Table 2 ~ Pilot interface switch functions when in AUTO/Timer mode.

Parameter Device

Type

Action Comments

Mode Switch Auto, Timer, Man

Switch

Set Mode to AUTO Changes the operation

mode. When set to AUTO,

primary microprocessor has

control.

Hyd Power Switch Turns on hydraulic

power

Energize EDUMP valves,

BLEED valve, pressurizes

hydraulic system

Fire switch Switch – 1NO, 1NC Open the doors when

pressed (if armed),

Close doors when

released

Located on flight stick

Armed Sw Switch Arms hydraulic

system directional

valves (hardware),

turn armed lamp on if

real time diagnostics

is OK

Display Armed & Ready on

Status, Light LED if all is

ready

Open Door Sw Switch Open the doors at

1/8 speed, opening

door

Open doors manually using

the primary AUTO system

Close Door Sw Switch Close the doors at

1/8 speed, closing

door

Close doors manually using

the primary AUTO system

Run Pump Sw Switch Turn on pump

output, running

pump

Run the pump using the

primary AUTO system.

Clears any detected pump

errors.

Test Lamps Sw Switch Test all lamps that

can be tested (see

LAMP TEST switch on

page 20)

This switch will not function

if the I2C serial diagnostics

bus is not active.



Parameter Device

Type

Action Comments

Yes Sw / No Sw Switch Not used for normal

operation

Used for menu selection of

item in the maintenance

and configuration menus

Foam / Menu Switch Used to inject foam

with the optional

foam injection pump

Pressing Foam from the

main AUTO or TIMER menu

displays the FOAM

INJECTION menu. Pressing

MENU will display the

various maintenance and

configuration menus.

Coverage Level

(Delivery Parameter)

GENII – Data Wheel

The coverage level in

gallons per 100

square feet

AUTO MODE: Set the

retardant flow rate desired

TIMER MODE: Set time for

doors to move towards

open

Gals to Dump

(Delivery Parameter)

GENII – Data Wheel

Pilot, 200, 250, 300,

350, 400, 450, 500,

500, 550, 600, 650,

700, 750, ALL

AUTO MODE: Set the

number of gallons to

release

TIMER MODE: Set time for

doors to remain open

Dual Armed Light Functionality (AUTO/TIMER Modes)

On GENII systems, two ARM indicator lights are provided. One ARM light indicates that the

microprocessor controlled AUTO system is armed while the second ARM light indicates that the

back-up electro-mechanical system is armed. Both ARM lights on indicates that both the primary

and backup manual system are armed and ready. GENII systems take any errors detected into

account before turning the AUTO armed LED on. The possible states of the GENII armed indicators

and their meanings are shown in the table below.



Table 3 ~ GENII Dual Armed Indicator Meaning (AUTO/TIMER modes)

MAN ARMED

LED

AUTO ARMED

LED

Indicated ARMED Status

ON ON FULL REDUNDANCY: The backup manual system is armed

and the primary AUTO system is armed. No errors are

detected for the AUTO system.

ON ON FLASHING REDUCED REDUNDANCY: The backup manual system is

armed and the primary AUTO system is armed. Errors are

detected for the AUTO system. The auto system may have

reduced accuracy or reduced redundancy. See status

message at the bottom of the alpha-numeric display.

OFF ON NO REDUNDANCY: The backup manual system is not

armed and the primary AUTO system is armed. This

condition cannot exist unless there is a hardware problem

with the manual system.

OFF ON FLASHING NO REDUNDANCY: The backup manual system is not

armed and the primary AUTO system is armed but has

detected errors. This condition cannot exist unless there is

a hardware problem with the manual system. The AUTO

system should operate properly. However, there is

no redundancy should the AUTO system fail.

ON OFF NO REDUNDANCY: The backup manual system is armed.

The primary AUTO system is not armed. This condition

normally exists when the Pilot Interface MODE switch is set

to MAN. The AUTO system may or many not operate

properly. The system has reduced or no redundancy.

The pilot interface and its functionality when operated in AUTO mode are shown in Figure 2.



Figure 2 ~ Pilot interface function when operated in AUTO mode (main AUTO menu shown).



Timer Mode Operation GENII systems also have a timer mode that allows operation of the system using minimal sensors

and valves. This mode is provided to allow operation in the event of a sensor or other hardware

failure that would prevent the AUTO mode from functioning properly. Trial and error adjustments

of the timer settings are required to provide the desired operation of the gatebox doors.

Note that timer mode provides constant door angle control similar to less capable systems

available on the market.

Timer mode is not recommended as the default operation mode since the quality of the ground

pattern and retardant usage is not as desirable as the pattern produced by the system when

operated in AUTO mode.

Timer mode operation is summarized below:

€ To enter Timer Mode, set the MODE switch on the GENII pilot interface to TIMER.

€ Use the selector knob to adjust the timer value in the COVERAGE window to control how

long the doors will slew towards the open position before stopping. This adjustment

controls the fixed gate angle used. Larger timer settings will result in a larger fixed door

opening.

€ Use the selector knob to adjust the timer value in the GALS TO DUMP window to control

how long the doors remain open before closing. This adjustment controls how much

retardant is delivered. If PILOT is selected for this parameter, the doors will close as soon

as the “FIRE” button is released during a delivery.

System drops and operation are identical for AUTO and TIMER (GENII only) mode except that the

retardant flow rate is not actively controlled in TIMER mode since the doors open to a fixed angle

and remain at this angle until they are closed.

The functionality of the pilot interfaces and switches when the system is operated in TIMER mode

are summarized in Figure 3 on the next page.



Figure 3 ~ Pilot Interface Functionality when operated in TIMER mode (main timer menu shown).



Special Uses of Panel Switches (AUTO/TIMER MODES) The panel switches are, for the most part, self-explanatory, and are described in detail in the AUTO

MODE and TIMER MODE operation sections. However, some of the panel switches have special

uses described below.

LAMP TEST switch

This switch tests the built-in panel indicator LEDs, with the EXCEPTION of the LEDs labeled “GATE

CLOSED” (two LEDs), “MAN SALVO”, and the left MAN “ARMED” LED. These LEDs are always

controlled by hardware and do not respond to the software controlled LAMP TEST function. The

remaining LEDs will respond to the LAMP TEST switch.

NO switch

While in most menus and sub-menus, the NO switch can be used to immediately exit the menu

system and return to the main system display.

During system startup, holding the NO switch down will start the system with FACTORY VALUES

after a warning message is displayed. Note, the system will not operate properly using the factory

default leakage and analog calibration values. This option is provided as an intermediate step

required to recover specific calibration data for your aircraft in the event of a memory problem.

While either an AUTO dump or TIMER dump is in progress, pressing the NO switch will ABORT the

dump and immediately close the gate doors.

RUN PUMP switch

Depressing this switch momentarily will clear ANY active errors except for errors 021 and 105

reported by the system diagnostics performed by the pilot (SysTest, See System Tests on page

26), including errors that may have shut down the hydraulic pump. Note that even though all

errors are cleared, the fact that these errors have occurred are still indicated in both the Error

History table and the Error Counts table.

€ Pressing the Run Pump clears all current errors except for error 021 and 105.

€ Current hardware errors will return once they are detected again by the system.

€ Errors 021 and 105 detected during SysTest will persist even if power is removed from the

unit until the appropriate SysTest has been successfully performed to clear the error(s) (See

System Tests on page 26).

Special Modes of Operation (AUTO/TIMER)

Fuel Ferry Mode This special mode of operation allows the airplane to be flown with the gate actuator hydraulically

locked in the closed position to ferry fuel in the hopper for long non-stop over-water flights. It can

also be used to ferry water or retardant to distant fires with the hydraulic pump remaining off to

preserve battery power, and insure that the gate doors are in a fail-safe mode and will not open. In

this mode, although the system is hydraulically locked, the hydraulic pump will remain off to

preserve battery power, and hydraulic pressure will NOT be maintained.



To enter this mode, perform the following steps:

� From the main AUTO or TIMER display press

the NO/MENU switch.

� The menu shown to the right should be

displayed.

� Use the selector knob to highlight FUEL FERRY

� Press the selector knob to enter FUEL FERRY

mode

� Turn the ARMED switch to the OFF position

� Turn the HYD POWER switch to the ON position

o The gate doors are now hydraulically locked and pump operation is disabled.

� This mode can be exited ONLY by switching “HYD POWER OFF TO EXIT”.

o No other switches or controls are operational to eliminate accidental exit from this

mode. The HYD POWER switch is a safety-locking switch and must be pulled out to

unlock it before it can be switched to the OFF position.

NOTE: The MAN SALVO button is active in this mode. Depressing the MAN SALVO button

regardless of ARMED or POWER switch setting will cause the pump to operate and the

gatebox doors to open slowly.

Pilot Interface “Mirror” mode A special mode has been incorporated to allow the same graphics and text displayed to the pilot to

be displayed or “mirrored” on the remote side loader gauges as well as any remote gages present

in the cockpit. This feature allows a remote display to be mounted in the rear cockpit for pilot

training purposes (or a more visible location in the front cockpit) and is useful during maintenance

of the system.

“Mirror” mode allows any remote display connected to the system (such as the remote hopper

gauges) to be used to display identical information as on the Pilot Interface display. For example,

you could monitor operation from just about anywhere as seen in the photo below.

The remote side loader gages display the same information as any “remote” displays

located in the cockpit. Be sure to set the MODE switch to MANUAL when loading the

system with retardant so that the side loaders display hopper gallons to ground

personnel.

Enabling/Disabling Mirror

Mode

To enable mirror mode functionality, set the value of

system parameter (tweak) 94 to the value of 255 (the

default factory value).

To disable mirror mode functionality, set the value of

system parameter (tweak) 94 to the value of 0.

Refer to Trotter Controls Engineering Report 0074 for

details on how to edit system operation parameters.



Activating Mirror Mode

If the mirror mode system parameter has been enabled using system parameter 94 (the default),

and the MODE switch is in either AUTO or TIMER mode, mirror mode is activated.

In this mode, the hopper gauge (which normally shows gallons in hopper) will “mirror” the same

information as displayed on the main Pilot Interface display when the system is in AUTO or TIMER

mode.

When the mode switch is set to MANUAL mode, the hopper contents are displayed on the remote

displays present in the cockpit and on the side loaders.

De-activating Mirror Mode

Placing the MODE switch in the MAN position will return the hopper gauge to its normal function.

Any remote displays (cockpit or side loader) will display the gallons of retardant present in the

hoppers.

Brightness Adjust mode

When the main display is visible in AUTO or TIMER mode, Pressing and holding the selector knob

will enter Brightness Adjust mode.

Brightness values may range from 1 (dimmest) through 8 (brightest). Setting a value of zero will

allow the brightness to “auto-adjust” based on ambient light at the Pilot Interface. The brightness

setting controls both the display of the Pilot Interface (and any “mirrored” displays) as well as the

brightness of any dimmable display lamps/LEDs on the Pilot Interface.

Foam Injection This feature (if installed) allows the operator to inject foam from the foam dispenser into the main

retardant hopper. This feature is selected by pressing “FOAM/YES” from the main AUTO or TIMER

screen.

� Press the “FOAM/YES” from the main AUTO or TIMER screen.

� Turn “Hyd Power” switch on.

o Note that the Hydraulic Pump cannot operate

during operation in this mode.

� Use the twist knob to select the number of seconds

(from 0 to 120) to run the injection pump.

� Press “YES” to operate the injection pump for the

specified amount of time.

� The timer value can be changed at any time, or the

“NO” switch can be used to turn off the pump.

o A countdown timer at the bottom of the screen shows the number of seconds

remaining for the injection cycle, while the number displayed at the lower right

indicates the gallons remaining in the foam tank.

� Pushing the selector knob exits this screen, turning off the injection pump if it was currently

on. At exit, the Hydraulic Pump will again be enabled unless the “Hyd Power” switch is first

turned off.



Manual Mode Operation The operations of the various switches on the panel are summarized in the table below.

Table 4 ~ Switch functionality in manual mode.

Parameter Device Type Action Comments

Mode Switch

(MAN)

Auto, Timer, EM

Switch

Set Mode to MAN When the switch is set to MAN,

the electro-mechanical

relay/timer system has control.

NO REDUNDANCY IN MAN

MODE.

Hyd Power Switch Turns on hydraulic power Energize EDUMP valves, BLEED

valve, pressurize hydraulic

system

Fire switch Switch – 1NO,

1NC

Open the doors when

pressed, Close doors when

released

Located on flight stick

Armed Sw Switch Arms hydraulic system

directional valves (hardware),

turn armed lamp on if real

time diagnostics OK

AUTO armed is not active when

in MAN mode (NO

REDUNDANCY IN MAN

MODE)

Open Door

Sw

Switch Open the doors at 1/8 speed, Open doors manually using the

secondary electro-mechanical

system

Close Door

Sw

Switch Close the doors at 1/8 speed, Close doors manually using the


system

Run Pump Sw Switch Active switch to manually

turn on the pump

Run the pump using the


system

Note that the system hardware is not able to turn the pump off when in manual (MAN) mode in the

event of a detected pump error. The pilot should monitor the RUN PUMP LED and make sure the

system has sufficient oil before using manual mode since the automatic pump error detection used

to detect errors is not active when operated in MAN mode.

Salvo System Activation GENII FRDS systems incorporate an automatic salvo backup system. The function of this sub-

system is to open the doors in the event that the primary (AUTO) system is unable to open the

doors due to a hardware or software error.

GENII systems provide two independent automatic salvo systems (one system is controlled by an

independent supervisor microprocessor (AUTO SALVO) while the second system is controlled by

relays and hardware timers only (MAN SALVO)).

The two independent automatic salvo systems are only active in AUTO or TIMER modes of

operation. The function of these systems is to monitor whether or not the primary AUTO/TIMER

system opened the gatebox doors as expected when the system is armed and the “FIRE” button is

depressed.



Automatic Salvo Activation If the doors do not open as expected in AUTO or TIMER mode when the system is “ARMED”,

hydraulic power is present, and the “FIRE” button is depressed, the system will perform the

following actions:

� Open the gatebox doors using a directional valve

o The AUTO SALVO microprocessor system uses valve 2 on the hydraulic manifold

o The MAN SALVO electro-mechanical system uses valve 3 on the hydraulic manifold

� Run the pump for a specified time interval

� Illuminate the AUTO SALVO or MAN SALVO LED to indicate which of the two independent

auto salvo systems has been activated.

o Note that normally the AUTO SALVO system is activated first.

o The MAN SALVO system is activated only if the AUTO SALVO system was unable to

open the doors for some reason within the specified amount of time.

See the sections below for more information regarding the AUTO SALVO and MAN SALVO system

operation.

Pilot Activated Salvo

The manual salve system can be activated using the red MAN SALVO button regardless of the pilot

interface switch settings. On GENII systems, this button is located adjacent to the power quadrant

on the L/H side of the cockpit.

o This RED button overrides the power, mode, and arm switches to open the gatebox doors.

If no hydraulic pressure is present in the system (system power is off), the doors will open

slowly as the pump delivers flow to open them.

o To open the doors using the MAN SALVO button, depress the red “SALVO” button. This will

run the pump, open the doors, then leave the doors in the open state after a timeout

period. The pump will run until a pressure of 3000 PSI is reached, then it will turn off

automatically.

o This latching button disables auto and manual operation when activated (pressed in).

��Caution: Never press this button unless you intend for the gatebox doors to open and

you have verified that all personnel are clear of the gatebox doors.

��Always deactivate the MAN SALVO button to resume normal system operation. The

button should be in the extended position for normal operation.

Auto Supervisor Activated Salvo No pilot action is required for this event to occur. The microprocessor controlled AUTO SALVO

system monitors the doors to make sure they open when expected. If the doors do not open

within 0.8 seconds after the fire switch has been pressed, the system will take over, isolate the

primary system and attempt to open the gatebox doors.



� Pre-conditions: MODE=AUTO or TIMER, HYD PWR=ON, ARMED=ON

� Activation Condition: If “FIRE” button is depressed and the gatebox doors do not open

within 0.8 seconds, an AUTO SALVO condition is triggered.

o If the AUTO SALVO system has been activated, this means that primary system

(AUTO or TIMER mode) failed to open the doors.

� The AUTO SALVO LED will be illuminated when this system is activated.

� Valve 2 (middle directional valve) on the hydraulic manifold is used to open the doors.

� The pump is operated for 20 seconds, then is turned off.

� The gatebox doors will remain open until the salvo condition is cleared.

MAN System Activated Salvo No pilot action is required for this event to occur. The electro-mechanical MAN SALVO system

monitors the doors to make sure they open when expected. If the doors do not open within 1.2

seconds after the “FIRE” switch has been pressed (this is 0.4 seconds after the AUTO SALVO

system would have tried to open the doors), the system will take over, isolate the primary system

and attempt to open the gatebox doors.

� Pre-conditions: MODE=AUTO or TIMER, HYD PWR=ON, ARMED=ON

� Activation Condition: If “FIRE” button is depressed and the gatebox doors do not open

within 1.2 seconds, a MAN SALVO condition is triggered.

� This MAN SALVO system is activated 0.4 seconds after the AUTO supervisor is activated.

o If the MAN SALVO system has been activated, this means that the AUTO SALVO

system failed to open the doors.

� The MAN SALVO LED will be illuminated when this system is activated.

� Valve 2 (middle directional valve) on the hydraulic manifold is used to open the doors.

� The pump operates until a pressure of 3000 PSI is reached and runs as required to maintain

hydraulic pressure. It’s operation is controlled via a relay and a pressure switch.

� The doors will remain open until the salvo condition is cleared.

Recovery from an Automatic Salvo Condition To reset the system after a AUTO or MAN SALVO event, the error must be cleared. To clear the

error on GENII systems perform the following actions:

� Turn the ARM switch to the “OFF” position.

� Turn the POWER switch to the “OFF” position.

� The condition should be cleared and the MAN SALVO button should not be illuminated.

� Turn the POWER switch to the “ON” position and operate the system as required.

If MAN SALVO is still displayed after performing the steps above, check the following:

� Verify that all breakers are pushed in are not tripped.

� Verify that the MAN SALVO red button is not pressed in.

� Verify that the relay enclosure is connected properly and receiving power as expected. MAN

SALVO is displayed anytime the relay enclosure is not receiving power as expected and the

pilot interface is active.



System Tests

The FRDS system passively monitors many parameters any time the HYD POWER switch is set to

the ON position and the mode is set to AUTO or TIMER. However, some items are only tested

when the pilot initiates a SysTest menu item, since outputs and valves must be activated to fully

test the system. The self test feature incorporated in the unit is able to detect the following

problems:

� Stuck valves

� Incorrectly wired valves (in most cases)

� Burned out wires

� Burned out coils

� Problems with the pump or accumulator

� Faulty or improperly adjusted sensors

� Improper manifold orifice installation

� Damaged or non-operational pilot interface switches

� Other errors

We recommend that the following tests be performed by the pilot on a regular basis as shown

below to ensure that the system is operating as expected:

Table 5 ~ Recommended Pilot Initiated System Test Schedule.

System Test Type Recommended

Test Interval

Comments

Pilot (no doors) Daily Test can be performed with hoppers fully

loaded

Pilot (ALL) Weekly Hoppers must be empty for this test

Auto Salvo Weekly Hoppers must be empty for this test

Man Salvo Weekly Hoppers must be empty for this test

Maint SysTest As required Hoppers must be empty for this test

System Self Diagnostic Tests – SysTest Menu To enter the SysTest menu, perform the following steps:

� From the main AUTO or TIMER menu press the

NO/MENU switch.

� The menu shown below should be displayed.

� Use the selector wheel to highlight SysTest

� Press the selector wheel to enter SysTest mode

� Use the selector wheel to select the test to be

performed

� Follow instructions on the screen

NOTE: The red MAN SALVO button is active in this mode. Depressing the MAN SALVO button will

cause the pump to operate and the doors to open slowly.



The SysTest submenu contains the following five menu items:

• Pilot (no doors) – Testing with no gatebox door movement allowed

• Pilot (ALL) – Comprehensive tests with gatebox door movement allowed

• Auto Salvo – Test the microprocessor controlled AUTO SALVO system

• Man Salvo – Test the electro-mechanical MAN SALVO system

• Maint SysTest – Same as Pilot(ALL) with PASS/FAIL and diagnostics reports displayed

Note that it is necessary to scroll the menu using the data

wheel to display all of the items shown above, since only

four items can be displayed at one time on the four line

display.

The individual submenu items are fully described in the

following sections.

Pilot (no doors) – System Test

This submenu item allows the pilot to quickly test system components that DO NOT result in the

gate doors being operated. This set of tests is useful when there are contents in the hopper that

should not be released. The total time of this set of tests requires about 45 seconds. The tests are

performed without the need for operator intervention unless any of the tests fail, in which case an

error indicator remains on the screen until cleared by the pilot. The set of tests that are performed

are:

• Switch Test (optional) – Pilot must cycle all switches during this test, then press the data

wheel in once all “illuminated blocks” indicating the switch positions are not illuminated to

continue to the next test (See Trotter Controls Document# TS-0005 for more information on

the switch test)

• Valve Mon1 Mon2 Test – Are the valves connected, OK, and is wiring OK.

• Hyd Pump pressure limit test

• Bleed / Edump Pass Fail test

Pilot (ALL) – System Test

CAUTION: The gatebox doors are operated during this test. Verify that all ground

personnel are clear before selecting this test.

This submenu item allows the pilot to quickly test ALL system components, including those that

result in the gate doors being opened. This set of tests is useful when the hopper is empty. The

total time of this set of tests requires about 2 minutes.

The tests performed are almost identical to the comprehensive maintenance system tests described

below except that no status is displayed to the pilot unless a failure is detected. Trotter Controls

Document# TS-0005 has a detailed description of the items that are tested.

The tests are performed without the need for operator intervention unless any of the tests fail, in

which case an error indicator remains on the screen until cleared by the pilot. The set of tests that

are performed are:



• Switch Test (optional) – Pilot must cycle all switches during this test, then press the data

wheel in once all “illuminated blocks” indicating the switch positions are not illuminated to

continue to the next test (See Trotter Controls Document# TS-0005 for more information on

the switch test)

• Valve Mon1 Mon2 Test – Are the valves connected, OK, and is wiring OK.

• Valve Wiring Test – Do valves function as expected. Are they connected properly?

• Gate prox switch test – Verify that the door home sensors function properly.

• Hyd Pump pressure limit test – Verify that the hydraulic pump and sensor are OK.

• Bleed / Edump Pass Fail test – Verify that the bleed and EDUMP valves function properly.

• Gate Angle voltage Test – Verify that the gatebox angle sensor functions properly.

Auto Salvo – System Test

CAUTION: The gatebox doors are operated during this test. Verify that all

ground personnel are clear before selecting this test.

This submenu item allows the pilot to test the primary microprocessor controlled automatic salvo

system (Auto Salvo) for ensuring that a dump occurs when the pilot requests one. This test should

be performed only when the hopper is empty. After starting this test, the operator is instructed to

press the DUMP (fire) switch. The primary system will inhibit dumping and the redundant system

should then initiate an AUTO SALVO. The display should read AUTO SALVO (in large text). Turn

the ARMED switch off to terminate this test after a salvo has occurred.

Man Salvo – System Test



This submenu item allows the pilot to test the secondary electro-mechanical automatic salvo

system (Man Salvo) for ensuring that a dump occurs when the pilot requests one. This test should

be performed only when the hopper is empty. After starting this test, the operator is instructed to

press the DUMP (fire) switch. The primary system and first redundant system will inhibit dumping

and the second redundant system should then initiate a MAN SALVO. The display should read MAN

SALVO (in large text). Turn the ARMED switch off to terminate this test after a salvo has occurred.

Maint SysTest – Maintenance Personnel – System Test



This submenu item allows maintenance personnel to test any or all system components. Unlike the

Pilot(no doors) and Pilot(ALL) tests, these tests require the operator to acknowledge the result of

each test, whether the test passes or fails. The operator may choose which tests to perform and

which tests to skip. The set of tests that may be performed are:



• Switch Test – Pilot must cycle all switches during this test, then press the data wheel in

once all “illuminated blocks” indicating the switch positions are not illuminated to continue

to the next test (See Trotter Controls Document# TS-0005 for more information on the

switch test)

• Valve Mon1 Mon2 Test

• Valve Wiring Test

• Gate prox switch test

• Hyd Pump pressure limit test

• Bleed / Edump Pass Fail test

• Hyd Pump rate & Bleed/eDump Test

• Continuous Hyd System Flush

• Gate Angle voltage Test

All of the tests performed in any of the SysTest menu choices are described in detail in a separate

document, Trotter Controls Document# TS-0005.

System Test Persistent Errors

The FRDS computer saves the results of the system tests to EEPROM so that an error is indicated

anytime the system has failed to pass SysTest as expected. This feature has been added to alert

the pilot that the system previously failed during the pilot initiated system test (SysTest) of the

controls and hydraulics hardware. These errors can only be reset by successfully performing the

system tests for the system hardware.

Two error conditions can be detected and will persist even if power is removed from the system

until the hardware is able to pass the system tests.

� "021_Panel Switch Err" - The switch test failed or was aborted by the pilot during the

current or previous SysTest.

� "105_Systest Err" - Some hardware item failed during the current or previous SysTest.

Error number 021 indicates that either a panel switch error had occurred during SysTest, or that

the operator had aborted the panel switch test without successfully completing the test by testing

all possible switch positions.

Error number 105 indicates that some error had occurred during a previous run of SysTest, and a

successful run of SysTest had not been completed since the error occurred.

Clearing Persistent SysTest Errors

While the RUN PUMP switch and the "Clear Errors" menu item of the “Maint” menu can be used to

“clear all errors”, these will NOT clear the persistent errors 021 and 105. These errors can only be

cleared by successfully running a SysTest procedure.



To clear error “021_Panel Switch Err”, perform either “PILOT (no doors)”, “PILOT (ALL)”, or “Maint

SysTest”.

o Make sure to cycle all switches during the switch test per Trotter Controls

Document# TS-0005.

o Do not press the data wheel to exit the switch test until all of the switches have been

properly cycled and the “illuminated block” indicators for each switch position have

gone out as each switch is actuated.

o The error is automatically cleared once the switch test has been properly performed

with no detected failures.

To clear error "105_Systest Err”, perform the PILOT (ALL) system test.

o Perform the “PILOT (ALL)” system tests per Trotter Controls Document# TS-0005.

o Do not exit the test or abort during the test sequence.

o The error is automatically cleared once the SysTest has been performed and the

hardware is verified to operate properly.

o Note that performing a “Maint SysTest” or a “Pilot (no doors)” SysTest WILL NOT

clear error 105. A successful PILOT (ALL) test is the only way to clear this error.

Maint SysTest can be utilized to diagnose the cause of the system failure but will not

clear the persistent error.

Menu System

The menu system is a multi-level set of menus that is initiated by pressing the “NO/MENU” switch

from the main AUTO or TIMER screen. Rotate the selector knob to the desired option and press the

selector knob to select that option. To exit any menu, press the NO switch, which results in

returning to the main AUTO or TIMER screen. Some menus have an “EXIT” option which will return

to the previous (higher level) menu.

Main Menu

The Main menu contains the following menu items:

• Maint – Maintenance Functions

• Config – Set the aircraft configuration

• SysTest – Perform hardware diagnostics

• Fuel Ferry – Special mode for ferry operations

• ErrorHistory – Display of logged errors

• Exit – Exits the current screen

Maint Menu

This menu item opens a “Maintenance” submenu which contains the following menu items:

• Tweak Parameters – Adjust system operation parameters - See Trotter Controls

Document ER-0074 for details.

• Digital Inputs – View the various inputs from switches and sensors in the system



• Digital Input Map – View a map of all inputs simultaneously

• Digital Outputs – View and/or force selected outputs

• Digital Output Map – View a map of all outputs simultaneously

• Analog Inputs – View the various voltages from sensors monitored by the system

• Analog Calibrate – Calibrate the system A/D converters (factory use only)

• Err Msg Index/Counts – Show a listing of all errors that can occur

• Clear Errors – Clear active errors but don’t clear the count of errors that have occurred

• Clear Err Counts – Clear the counts for the number of times a given error has occurred.

This clears the counts for all error counters.

• Clear ErrHistory – Clear the error history buffer

• System Reset – Restart/Re-boot the primary microprocessor

• Save Memory – Save memory to the internal and/or external data memory

• Read EEprom – Read the leakage data and other information from the external memory

• Compare RAM/EE – Display the differences in active parameters and the EEPROM memory

• Logo/Version – Display the Air Tractor Logo and software version installed

• Leakage Table – Display the tank leakage calibration factors

• Exit – Exit the menu

Config Menu

This menu item opens a “Configuration” submenu which contains the following menu items:

• Aircraft – Select the aircraft type and hardware configuration

• Learn – Set learning mode for dump pit calibration. Refer to PS-0032

• H/Ware – Future Use - Hardware configuration options.

• Exit – Exit the menu

SysTest Menu

This menu item opens a “SysTest” submenu. This menu selection is used to select the various

diagnostics self tests that can be performed by the system. The system test features are described

in System Test section of this document.

Error History

From the Main menu, select “Error History”. This display shows any errors that have occurred in

chronological order. Errors displayed include those encountered during the current run, as well as

those that have occurred during previous runs of the system. A “system reset” entry (code 001)

separates the current run errors from those of previous runs. The most recent error is at position

number 1 of the error history table, with the oldest error at position number 50. The position of

the entry at the beginning of the current run is indicated by “(1st boot entry)”. Errors at positions

lower than this entry (through position number 1) have occurred during the current run of the

system. Errors at positions higher than this entry (through position number 50) have occurred

during prior runs of the system.



Digital Inputs

This menu option allows maintenance personnel to view the values of various digital inputs to the

system. Each input is listed with its hardware pin designator and preceded with its current value,

either “ON” (in highlighted text) or “OFF” (in normal text). The sequence number of the input is

displayed in highlighted text. The sequence number ranges from 0 to 81 and is associated with the

“Digital Input Map” display (described next). Panel switches appear at the beginning of the digital

input display to facilitate easy testing.

Note: “Digital Inputs” mode is the ONLY mode (other than Pilot Assisted Test – SysTest) in which

an AUTO dump is INHIBITED. In all other modes, if the system is “ARMED” and “Hyd Power” is on

and the Fire switch is pressed, an auto dump will be performed. “Digital Inputs” mode will inhibit

an auto dump if the MODE switch is in either the “AUTO” or the “TIMER” position. Note that simply

inhibiting an auto dump will NOT prevent a dump from happening; because if an auto dump DOES

NOT occur, one of two backup systems (AUTO SALVO or MAN SALVO) will take control and open

the gate doors.

Digital Input Map

This menu option allows maintenance personnel to view the values of all digital inputs to the

system on a single screen. Since there are 21 characters per line and four lines per screen, up to

84 inputs may be viewed at once. Digital inputs are numbered from 0 to 83, and are listed

sequentially on the display with 0 to 20 on the top line, 21 to 41 on the second line, 42 to 62 on

the third line, and 63 to 83 on the bottom line. To

facilitate ease of reading the display, a digit

(0,1,2,3,4,5,6,7,8) is displayed every 10 positions

to indicate positions 0,10,20,30,40,50,60,70, and

80. A slash mark “/” is displayed every 5 positions

at position 5,15,25,35, etc. Positions that

correspond to an input value of “ON” will contain a

block character. Positions that correspond to an input value of “OFF” will NOT contain a block

character. The sample display below shows all inputs “OFF” except for inputs numbered 1, 10, 13,

15, 31, 33, 77, 79, 80, and 81.

To facilitate easier reading of the display when many “ON” states (block characters) exist, when a

block character is present at a position that is a multiple of five (0,5,10,15,20,etc.), a narrow block

character is used instead of the full-sized block character. Note that the first 11 digital input values

(positions 0 to 10) represent the current state of the Pilot Interface panel switches, as viewed from

left to right. A complete list of the digital input numbers can be viewed in the “Digital Inputs”

display.



Digital Outputs

This menu option allows maintenance personnel to view

Documents

FRDS GENII Maintenance and Troubleshooting Manual · 2015. 5. 23. · FRDS GENII FEATURES ... lets the pilot select the volume of agent released during a dump. This enables “split