Troubleshooting (Generator) - MULTIQUIP GAC6HRS Operation And Parts Manual

Symptom
Low voltage
Low voltage, 3650 RPM (unloaded),
2500 RPM (idle)
Voltage output too high.
Voltage output too high. Engine speed
normal 3650 RPM (unloaded), 2500
RPM (idle)
Circuit breaker will not turn on "NO
LOAD"
Circuit breaker will not turn on "NO
LOAD"
Circuit breaker will turn on "LOADED"
but trips immediately.
Does not accelerate from low to high
"NO LOAD"
Does not accelerate from low to high
"LOAD ACTIVE"
Does not decelerate but has
"VOLTAGE OUTPUT".
GAC6HR/HRS 60 HZ GENERATOR • OPERATION AND PARTS MANUAL — REV. #1 (12/13/17) — PAGE 35

TROUBLESHOOTING (GENERATOR)

Troubleshooting (Generator )
Possible Problem
Engine speed too low?
AC voltmeter not working?
Control box internal wiring
malfunction?
Rotor winding malfunction?
Stator winding malfunction?
Leakage breaker malfunction?
Full power switch malfunction?
Engine speed too high?
Control box internal wiring
malfunction
Defective circuit breaker?
Defective circuit breaker?
Overload Condition?
Load circuit is shorted?
Stuck solenoid?
Bad Idle control switch?
Idle control switch malfunction?
Idle control device malfunction?
Control box interal wiring
defective?
Control box wiring malfunction?
Defective solenoid?
Idle control device malfunction?
Solution
Raise engine speed to rated RPM.
Replace Ac voltmeter.
Check control box wiring.
Check or replace rotor.
Check or replace stator.
Check or replace CB1.
Check full power switch and full power
switch circuit.
Lower engine speed to rated RPM.
Check control box wiring.
Replace circuit breaker.
Replace circuit breaker.
Reduce load or replace breaker.
Check load circuit for short.
Check solenoid.
Check or replace idle control switch.
Check or replace idle control switch.
Check or replace idle control device.
Check control box wiring.
Check control box wiring, replace any
defective components.
Check or replace solenoid.
Check or replace idle control device.