Sensor fault from PCA 154 404 — Compressor is blocked: Outdoor unit sensor fault

What does 154 404 mean?

There is a sensor fault in the outdoor unit, indicated by 'Sensor fault from PCA 154 404'. Refer to the relevant manual for details.

• Sensor fault in the outdoor unit

Click steps to track your progress.

1. 1

   Refer to the relevant manual for 'Sensor fault from PCA 154 404'.

2. 2

   Examine outdoor unit sensors for correct operation.

3. 3

   Verify connections to the PCA.

4. 4

   A service technician should be involved.