Multiquip MQP20P manual Troubleshooting Generator, Symptom, Possible Problem, Solution

Troubleshooting (Generator)

Troubleshooting (Generator)

Symptom	Possible Problem	Solution
	AC Voltmeter defective?	Check output voltage using a voltmeter.
	Is wiring connection loose?	Check wiring and repair.
No Voltage Output	Is voltage regulator defective?	Replace if necessary.
	Defective Rotating Rectifier?	Check and replace.
	Defective Exciter Field?	Check and replace.
	Is engine speed correct?	Turn engine throttle lever to “High”.
Low Voltage Output	Is wiring connections loose?	Check wiring and repair.
	Defective AVR?	Replace if necessary.
High Voltage Output	Is wiring connections loose?	Check wiring and repair.
	Defective AVR?	Replace if necessary.
	Short Circuit in load?	Check load and repair.
Circuit Breaker Tripped	Over current?	Confirm load requirements and reduce.
	Defective circuit breaker?	Check and replace.
	Over current Relay actuated?	Confirm load requirement and replace.

page 36 —MQP20P STANDBY GENERATOR • operation and parts manual — rev. #1 (11/28/11)