Outdoor fan motor error

What does U8 mean?

The outdoor fan motor is abnormal if its rotational frequency is detected as abnormal during operation, specifically 100 rpm or below for 1 second at 30°C or more, or 30 rpm or below/1000 rpm or more for 1 minute continuously. This indicates a problem with the fan motor or its control circuit. Failing to resolve this can lead to insufficient heat exchange, compressor overheating, and overall system performance degradation.

Complete Troubleshooting Guide

1. 1

   Check the DC fan motor for physical obstructions, bearing issues, or signs of failure. Check or replace it as necessary.

2. 2

   Measure the voltage supplied to the outdoor circuit controller board during fan operation.

3. 3

   Replace the outdoor circuit controller board if the fan motor is confirmed functional and the error persists.