Reverse Phase Detection

What does F1 mean?

The outdoor unit has detected that the incoming main power phases are reversed. This condition prevents proper operation of the outdoor unit and can lead to damage if not corrected.

1. 1

   Verify the phase rotation of the incoming power supply at the outdoor unit's main power input terminals using a phase rotation meter.

2. 2

   Correct the phase sequence at the main power supply or the unit's input terminals (L1, L2, L3) as necessary.