Allen-Bradley 1407-CGCM, User Manual, Page: 156 / 252

Rockwell Automation Publication 1407-UM001H-EN-P - November 2014
#HAPTER Troubleshooting
Voltage output is greater than
setpoint AVR not selected / enabled Check excitation AVR select Correct Logix controller logic or I/O
as required
Wiring error Check wiring for excitation current
output, VT inputs, fuses open,
grounding, and PMG/supply Correct wiring as required
Gain mis-adjusted Check gains entered into CGCM unit
configuration Calculate / adjust as required
Excitation limiting active Check UEL active input Correct UEL configuration or change
operating point
Droop compensation is driving up
the voltage Check Droop Enable Adjust/disable droop compensation
Voltage is erratic or unstable Gain mis-adjusted Check gains entered into CGCM unit
configuration Calculate / adjust as required
Wiring error Check wiring for excitation current
output, VT inputs, fuses open,
grounding, and PMG/supply Correct wiring as required
Prime mover is unstable Check prime mover governor
operation Correct as required
Excitation limiting active Check UEL/OEL active input Correct UEL/OEL configuration or
change operating point
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