Troubleshooting – Compressor won’t start

Probable Cause Display Reading What to Do 110/120V control voltage not available. None Check fuses. Check transformers and wiring connections.   "STARTER FAULT" Inspect contactors.   "EMERGENCY STOP" Rotate emergency stop button to disengage and press "SET" button twice.   "MAIN MTR OVER LD" or "FAN MTR OVERLOAD" Manually reset main or fan motor overload relay and press "SET" button twice.   "PRESS SENSOR FAIL" or "TEMP SENSOR FAIL" Check for defective sensor, bad sensor connection or broken sensor wires.

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