Troubleshooting (Voltage Regulator) - MULTIQUIP Power MQP20P Operation And Parts Manual

Symptom
Residual Voltage - No output
Output Voltage Low
Output Voltage High
Output Voltage High - No
Adjustment
Remote Voltage Adjust
Operates Backwards
Generator Output Voltage
Hunting
Poor regulation
page 40 —MQp20p STaNDBY geNeRaTOR • OpeRaTiON aND paRTS MaNual — Rev. #1 (11/28/11)

trOubLEShOOtIng (vOLtagE rEguLatOr)

Troubleshooting (voltage Regulator)
possible problem
Residual Voltage at regulator power input
wires 3 and 4 below 10 VAC?
Accelerated time to rated speed too long?
Field leads F1, F2 not connected?
Power input leads not connected?
Blown or missing fuse?
Defective regulator?
Defective generator?
Incorrect connections?
Voltage Adjust turned down?
Remote Voltage Adjust is turned down?
Defective regulator?-
Voltage Adjust turned too high?
Remote Voltage Adjust is turned too high?
Defective regulator?
Voltage adjust wire connected backwards?
Stability Adjust not set properly?
Defective regulator?
Solution
Check wiring diagram for proper connections.
Flash generator speed. Refer to field flashing section
in generator manual.
Reduce acceleration time.
Interrupt power input to regulator after achieving rated
speed.
Connect field leads F1, F2.
Connect power input leads 3, 4.
Replace fuse.
Replace regulator.
Consult generator manual.
Check wiring diagram for proper connections.
Rotate Voltage Adjust clockwise until the desired
voltage is reached.
Rotate remote Voltage Adjust clockwise until the
desired voltage is reached.
Replace regulator.
Rotate Voltage Adjust counterclockwise until the
desired voltage is reached.
Rotate remote Voltage Adjust counterclockwise until
the desired voltage is reached.
Replace regulator.
Reverse the wiring of the remote Voltage Adjust.
Rotate the Stability Adjust clockwise until hunting stops.
Replace regulator.