A987_O: Compressor Loss of Phase

EcoNet - A987_O ยป

Status

3 strikes then locked out until system is hard reset by cycling power to both indoor and outdoor equipment for 3 minutes.

Description

The drive has detected a loss of one of the phases to the compressor. This can be within the compressor itself, in the wire plug assembly or internal to the drive itself.

Expected Operation

No operation.

Cause

Most likely cause is that the compressor wiring is disconnected or mis wired. Other less likely causes are a failed compressor or a failed compressor drive.

Solution

Check compressor and fan motor windings for open or shorted windings. IF they are open or shorted, replace compressor or motor. Check plug harness for any visible signs of damage. If damaged, replace plug harness.
If compressor, motor and harnesses are OK, replace drive.