Generator Error Codes 1055, 1065 & 1066

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Generator Error Codes 1055, 1065 & 1066

Postby gaoneal on Tue Oct 10, 2017 11:26 am

Let's see if anyone can come up with a solution, your responses are very welcomed.

ERROR CODES RECEIVED FROM 5 YEAR OLD GENERAC 15kW GENERATOR:

Overspeed ALARM 1205
Instantaneous
Over 75Hz for 0.1 second (100 milliseconds).
Possible cause: Stepper motor/mixer body assembly issue.

1048 VSCF Overload
Unit shuts down during operation.
Alternator, AVR or wiring is damaged. Contact an Independent Authorized Servicing Dealer. Visually inspected and saw no damage.

1055 VSCF Phase Error
Unit shuts down during Operation
An incorrect voltage and frequency has been detected during starting. Probable causes are:
1. Alternator damage Contact an Independent Authorized Servicing Dealer.
2. Generator has started into a severe load. Manually operate transfer switch back to utility position and try to restart unit. If problem persists, remove load and attempt to restart unit. This was completed 3 times with no resolution.
3. The engine may not be reaching its prescribed speed. Proceed as follows:
a. Verify stepper motor is moving and linkage is free. Visual looked fine
b. Verify stepper motor is plugged in. Visually inspected and everything is connected.
c. Verify gas pressure is within specified limits. Did not perform.

1065 Overfrequency
Unit shuts down during operation
Probable Cause:
1. Overload, remove load and attempt to restart unit. Completed 7 times, unit stills showed 65-75Hz and shuts down. 1 attempt it ran at 40Hz and lights were dim.
2. RPM sensor has failed. Contact an Independent Authorized Servicing Dealer
3. Stepper motor problem, Contact an Independent Authorized Servicing Dealer
gaoneal
Junior Member
 
Posts: 1
Joined: Tue Oct 10, 2017 11:16 am
My RE system: I have a 48V system with an Photovoltaic Array, (1) FM80, VFX3648 Inverter, (8) Trojan L16 RE-B batteries, 240V Supply, 120V 15kW Generac Generator and a Mate3 Controller.

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