Troubleshooting (Generator) - MQ Power WHISPERWATT Series Operation Manual

Practically all breakdowns can be prevented by proper handling and maintenance inspections, but in the event of a
breakdown, use Table 15 shown below for diagnosis of the generator. If the problem cannot be remedied, consult our
company's business office or service plant.
Symptom
No Voltage Output
Low Voltage Output
High Voltage Output
Circuit Breaker Tripped
DCA40SSKU4F2 60 HZ GENERATOR • OPERATION MANUAL — REV. #2 (08/30/22) — PAGE 49

TROUBLESHOOTING (GENERATOR)

Table 15. Generator Troubleshooting
Possible Problem
Defective AC voltmeter?
Loose wiring connection?
Defective AVR?
Defective rotating rectifier?
Low engine speed?
Loose wiring connection?
Defective AVR?
Loose wiring connection?
Defective AVR?
Short circuit in load?
Over current?
Defective circuit breaker?
Overcurrent relay actuated?
Solution
Check output voltage and replace if necessary.
Check wiring and repair.
Replace if necessary.
Check and replace.
Check and adjust.
Check wiring and repair.
Replace if necessary.
Check wiring and repair.
Replace if necessary.
Check load and repair.
Confirm load requirement and reduce.
Check and replace.
Confirm load requirement and reset.