Multiquip GAC-9.7HZ manual Troubleshooting Generator

troubleshooting (GENERATOR)

Table 7. Generator Troubleshooting

Symptom	Possible Problem	Solution
Low voltage	Engine speed too low?	Raise engine speed to rated RPM.
	AC voltmeter not working?	Replace Ac voltmeter.
	Control box internal wiring	Check control box wiring.
	malfunction?
Low voltage. Engine speed normal	Defective ignition coil?	Check red and green ignition wires.
		Replace ignition wires if necessary.
3650 RPM (unloaded), 2500 RPM
	Rotor winding malfunction?	Check or replace rotor.
(idle)
	Stator winding malfunction?	Check or replace stator.
	Leakage breaker malfunction?	Check or replace CB1.
	Full power switch malfunction?	Check full power switch and full power
		switch circuit.
Voltage output too high.	Engine speed too high?	Lower engine speed to rated RPM.
Voltage output too high. Engine speed	Control box internal wiring	Check control box wiring.
normal 3650 RPM (unloaded), 2500	malfunction
RPM (idle)
Circuit breaker will not turn on "NO	Defective circuit breaker?	Replace circuit breaker.
LOAD"
Circuit breaker will turn on "LOADED"	Overload Condition?	Reduce load or replace breaker.
but trips immediately.	Load circuit is shorted?	Check load circuit for short.
Does not accelerate from low to high	Stuck solenoid?	Check solenoid.
"NO LOAD"	Bad Idle control switch?	Check or replace idle control switch.
Does not accelerate from low to high	Idle control switch malfunction?	Check or replace idle control switch.
	Idle control device malfunction?	Check or replace idle control device.
"LOAD ACTIVE"
	Control box interal wiring defective?	Check control box wiring.
	Defective rotor windings?	Check or replace rotor.
Does not decelerate no"VOLTAGE	Defective solenoid?	Check or replace solenoid.
OUTPUT".	Defective idle control device?	Check or replace idle control device.
	Defective solenoid?	Check or replace idle control device.
	Control box wiring malfunction?	Check control box wiring, replace any
Does not decelerate but has		defective components.
"VOLTAGE OUTPUT".	Defective solenoid?	Check or replace solenoid.
	Idle control device malfunction?	Check or replace idle control device.

page 32 — GAC9.7HZ 60 hz gENERATOR• operation and parts manual — rev. #2 (03/31/10)