DVR2000E Training--SECT #8 (Troubleshooting)

7/30/2019 DVR2000E Training--SECT #8 (Troubleshooting)

http://slidepdf.com/reader/full/dvr2000e-training-sect-8-troubleshooting 1/18

DVR®

2000E / DVR®

2000EC

Troubleshooting



2

DVR®2000E/EC Troubleshooting- Section Overview -

This section will discuss basic troubleshooting for theDVR ® 2000E/EC voltage regulator. Specific problems

are detailed further in the DVR ® 2000E Installation,

Operation, and Maintenance (IOM) Manual (GPN019

03/06) on Pages 41 – 45. This section is separated into(2) parts:

Troubleshooting a DVR®2000E/EC installed on a

generator in the field

Troubleshooting a DVR®2000E/EC on a test

bench



3

DVR2000 ® E/EC Troubleshooting- Field Testing -

Troubleshooting scenarios are provided in theDVR ® 2000E Installation, Operation, and Maintenance

(IOM) Manual (GPN019 03/06) beginning on page 41.

This presentation will focus on basic troubleshooting

methods for the DVR ® 2000E/EC . Specificscenarios/problems can be discussed as a group as

required.

NOTE: Marathon Electric recommends that testing

discussed in this presentation be completed with NO-

LOAD on the generator .



4

DVR2000 ® E/EC Troubleshooting- Field Testing Note-

NOTE: It is recommended by Marathon Electric that, when possible, youutilize the „Metering‟ screen in the Marathon-DVR ® 2000E-COMS Software

for troubleshooting as this screen will provide you much insight into the the

generator system including exciter field conditions and alarm status. See

diagram below.

GeneratorOutput Voltage

GeneratorOutput Current (if CT connected)

GeneratorFrequency

(Calculated, not

measured)

Additional SystemInformation

Exciter Field

Voltage and Current



5

DVR®2000E/EC Troubleshooting- Field Testing Note-

NOTE: Metering Button/Alarm/Status Tab. Any alarms displayed on thisscreen should also be seen on the Front Panel Display/LEDs.



6

DVR®2000E/EC Troubleshooting- Field Testing Basics-

In the event of a problem in which the DVR ®

2000E/EC issuspect, confirm the following (10) items with NO-LOAD on the generator:

1. Check Front Panel/Metering Screen for Alarm Status. If analarm is indicated, correct problem. These alarms are defined inthe DVR ® 2000E Installation, Operation, and Maintenance (IOM)Manual (GPN019 03/06) on Pages 23 – 24.

NOTE: If DVR ®

2000E/EC latches-off , upon applying power to theDVR ® 2000E/EC the function indicator LED on the front panel willflash rapidly for 5 seconds to indicate Latch-Off Mode prior toactivating regulation. This is very useful in troubleshooting whythe regulator is shutting down.



7

DVR®2000E/EC Troubleshooting- Field Testing Basics (Cont’d) -

2. Check the Integrity of All Connectors and Signal WireIntegrity. Correct as necessary.

3. Check Wiring Connections. The connection should be madeas shown in the IOM on Pages 33 – 36. Correct as necessary.

4. Confirm Shaft Speed. It is always recommend to verify shaftspeed with a tachometer or other equipment (i.e., not by thesound of the engine). Correct as necessary.

5. Check DVR®2000E/EC Input Power (Terminals 3 & 4). Thissupplied by the PMG and should be nominally:

a) 220 Vac, 300 Hz at 1800 RPM (60 Hz)b) 190 Vac, 250 Hz at 1500 RPM (50 Hz)

6. Check DVR®2000E/EC On-Board Fuse. If failed replace withequivalent fuse.



8


7. Review DVR®

2000E/EC Settings. Confirm that the settingsare correct either using the Front Panel or Marathon-DVR ® 2000E-COMS Software.

8. Check Sensing Inputs (Terminal E1, E2, E3). Confirm thatyou are sensing the correct voltage and confirm that you are

sensing on the proper generator terminals.

9. Constant Excitation (12V Battery) Test. This test is used toisolate the DVR ® 2000E/EC and confirm that the regulator is thebasis of the problem. Disconnect all DVR ® 2000E/EC leads,isolating Leads 3, 4, E1, E2, and E3 which will have voltage on

them. Follow instructions in your generator manual for performing this test. Compare generator output voltage todatasheet (available from the Marathon Electric website or your Regional Marathon Electric Representative) for your modelgenerator.



9


10a. Correct generator problem and repeat Steps #1 - #9. If there is a problem found with your generator, correct thegenerator problem and repeat these steps if your problempersists.

10b. Review IOM Pages 41 – 45. If there is no problem foundwith the generator, review the IOM for specific problem. If

a problem not listed in the IOM is found, contact your Marathon Electric Regional Representative for assistance.

NOTE: If you find the problem is related to the DVR ® 2000E/EC

regulator, it is recommended that you perform a bench test on theregulator prior to contacting your Marathon Electric Regional

Representative for a return authorization (AKA, RGA number).



10

DVR®2000E/EC Troubleshooting- Bench Testing Basics -

In the event that you replace a DVR ® 2000E/EC , it isrecommended that you do the following tests prior to

scrapping the unit or contacting your Marathon Electric

Regional Representative for return authorization (if

within warranty):

1. Confirm Internal Connections

2. Perform “Light Bulb” Test

3. Test on Known Working Generator (if possible)



11

DVR®2000E/EC Troubleshooting- Internal Connection Test -

Measure the following to determine if regulator power stage is intact:

Terminals (F+) to (F-): Using thediode setting of your meter. This

should „Open‟ in one direction and

0.5 Vdc (approximately) in the other

direction.

Terminals (F-) to (7): Using the

diode setting of your meter. This

should „Open‟ in one direction and

0.5 Vdc (approximately) in the other

direction.

Internal Fuse (Terminals (3) to

(Rectifier Rivet)): Using the

resistance setting of your meter. If

this connection is intact meter

should indicate minimal resistance.

NOTE: If the values

measured do not

agree with the

values discussed,

the regulator is

internally failed and

cannot be repaired.

External Fuse: Using the

resistance setting of your meter. If

fuse is “good” meter should

indicate minimal resistance.

Replace fuse if “bad”.



12

DVR®2000E/EC Troubleshooting

- “Light Bulb” Test (Power Supply) -

• A separate power supply may be purchasedwhich will limit the current into the regulator.The power should be equivalent to:

– Volgen SPN-50-48S – See Volgen Power Supply Specifications.pdf

included on seminar compact disk for further details

• Attach the wire terminals to Terminals 3 and 4of DVR ® 2000E/EC regulator. Be sure to attach

a grounding wire prior to applying power.

NOTE 1: For the “Light Bulb” Test, Marathon Electric recommends that you use

a 48 Vdc, equivalent to the Volgen SPN-50-48S, in order to limit the amount of

current into the DVR ® 2000E/EC which could further damage the unit.

NOTE: No matter what power source you choose, be sure

that the DVR ® 2000E/EC is hard-wired to earth ground with no

smaller than 12 AWG copper wire attached to the ground

terminal on the rear of the unit case.



13

DVR®2000E/EC Troubleshooting- “Light Bulb” Test (Connection) -

Terminals 3 & 4: Connect power

supply

Terminals (F+) & (F-):

Connect 120 Volt, 100 Watt

Light Bulb (recommended)

GROUND--Hard-wired GND

Terminal to earth ground with

no smaller than 12 AWG

copper wire directly attached

to terminal



14

DVR®2000E/EC Troubleshooting- “Light Bulb” Test (Safety) -

NOTE: It is highly recommended that the protective cover be installed on the DVR ® 2000E /

DVR ® 2000EC whenever power is applied to the DVR ® 2000E / DVR ® 2000EC as the heat sinks

on the rear-side of the DVR ® 2000E / DVR ® 2000EC are live when power is applied.

Ref: IOM, Page 27

Attached protective cover BEFORE applying power.



15

DVR®2000E/EC Troubleshooting- “Light Bulb” Test (Procedure) -

1. Connect as shown.2. Apply power to DVR ® 2000E/EC and activate FCR/Manual

Mode either through the Front Panel or the Marathon-

DVR ® 2000E-COMS Software. LED #3 on the Front Panel

should be blinking in either case.

3. Using the Front Panel (LED #4) or the Marathon-DVR ® 2000E-

COMS Software (Settings Button / Set point Tab), adjust the

FCR Set point (A) up and down.

a) If you see the light bulb illumination vary, your

DVR ® 2000E/EC is outputting current and may still be intact

(confirm with generator test…see next slide)

b) If you do not see a change in the illumination of the light

bulb the DVR ® 2000E/EC may be damaged and should not

be used on another generator until fully evaluated by

qualified personnel





17

DVR®2000E/EC Troubleshooting- Summary -

In summary, prior to contacting your Marathon Electric Regional Representative to return a DVR ® 2000E/EC

voltage regulator , follow this troubleshooting sequence:

1. Confirm Internal Connections

2. Perform “Light Bulb” Test

3. Test on Known Working Generator (if possible)



DVR®2000E/EC Troubleshooting- End of Section -

QUESTIONS?

Documents

DVR2000E Training--SECT #8 (Troubleshooting)