Marathon Electric DVR 2000E+ - Page 59

57
8
Is CT ratio correct?
Check CT Ratio
setting and adjust
as necessary
If PT’s used, is PT
ratio correct?
Check PT Ratio
setting and adjust
as necessary
Check exciter
stator, rotating
rectifier and exciter
rotor winding per
generator manual
Is Generator
Excitor OK?
Is Power Limit
threshold too low?
Check Power Limit
threshold and
adjust as
necessary
a001 ALARM
a002 ALARM
f002 FAULT
Is CT polarity
correct?
Check physical
markings on CTs
or compare
DVRPortal
®
power meter with
known kW.
Correct as
necessary.
Is Under Excitation
threshold too low?
Check Under
Excitation
threshold and
adjust as
necessary
a006 ALARM
Check address,
priority and timing
parameters and
adjust as
necessary
Are CAN
parameters
correct?
Reduce ambient
temp if possible, or
remote-mount
DVR in cooler
location
Is DVR ambient
temperature too
high?
a007 ALARM
f007 FAULT
High heat source
near DVR?
Re-locate heat
source, if possible,
or remote-mount
DVR in cooler
location
Check for
presence of
heartbeat
message from
ECU
Is ECU heartbeat
present?
check
check
check
check
ALARMS AND FAULTS TROUBLESHOOTING FLOWCHART
check
check
check
yes
yes
Generator Power Limit Alarm
Under Excitation Alarm/Fault
Loss of CAN Communication Alarm
Regulator Over Temperature Alarm/Fault
check
no
no
no
yes
yes
yes
Use DVRPortal®
Use DVRPortal®
Use DVRPortal®
Use DVRPortal®
Use DVRPortal®
Visual Check / Use
DVRPortal®
Use CAN Analyzer
Use thermometer
or DVRPortal®
Maintenance and Troubleshooting
GPN046 04-13.indd 57 4/5/13 10:24 AM