Cause
- Controller is unable to determine the correct phase relationship.
| Components | Troubleshooting | Corrective actions |
|---|---|---|
| N/A | Power cycle the unit. | Resetting the unit may correct problem, monitor the unit. |
| Wiring | Check unit wiring. Confirm pressure readings during start-up; suction pressure should decrease and discharge pressure should increase. | Correct wiring. |
| Current Sensor | Check Cd41, right most digit: If display is 3 or 4 check compressor / sensor wiring. If display is 5 the current sensor is defective. | Replace current sensor if defective. |
