4-2 Troubleshooting
TP-5631 7/96
General Troubleshooting Chart (Sheet 2 of 2)
Problem
Possible Cause
Corrective Action
No AC output
AC circuit breaker in OFF position
Place circuit breaker in ON position
No AC output
AC circuit breaker tripping because of overload
Reduce load on generator set
AC circuit breaker tripping because of short
circuit
Correct cause of short circuit
Voltage regulator fuse blown
Replace fuse
Internal generator problem
Contact distributor
Low output or excessive
drop in voltage
Generator set overloaded
Reduce load
Low output or excessive
drop in voltage
Engine speed too low
Check governor
Faulty/misadjusted voltage regulator
Check voltage regulator adjustment and/or test
voltage regulator
Internal generator problem
Contact distributor
High output voltage (or
high frequency)
Loose voltage regulator connections
Check connections
High output voltage (or
high frequency)
Governor misadjusted (high frequency)
Check governor
Faulty voltage regulator
Check voltage regulator adjustment and/or test
voltage regulator
Internal generator problem
Contact distributor
Generator set stops
suddenly
Low oil pressure shutdown
Check oil level, oil pressure, and switch for
function
suddenly
Out of fuel
Add fuel
Overcrank shutdown *
Reset controller. If overcrank fault reoccurs,
troubleshoot generator and/or controller
Fuse blown in controller
Replace fuse. If fuse blows again, troubleshoot
controller
Engine malfunction
Troubleshoot engine
Overspeed shutdown *
Reset controller. If generator set overspeeds
again, troubleshoot generator and controller
Overvoltage shutdown (if equipped) *
Troubleshoot generator and controller
Generator master switch in OFF/RESET
position *
Move switch to correct position (RUN or AUTO)
Emergency stop switch activated (local or
remote) *
Check reason for emergency shutdown; reset
switch
* 5-light microprocessor controller only.
