5 flashes, 4 beeps - Outdoor 3-Phase Power Supply Reverse Phase / Missing Phase

What does 54 mean?

This error means the 3-phase power supply to the outdoor unit is incorrect, either with the phases reversed or one phase missing. This can cause damage to the compressor and motor.

• Incorrect Wiring of 3-Phase Power Supply
• Reverse phase or missing phase

Click steps to track your progress.

1. 1

   Immediately turn off the power to the unit.

2. 2

   Verify that the 3-phase power supply wiring is connected correctly according to the installation manual.

3. 3

   Consult a qualified electrician to confirm the incoming power phases are correct and present.

4. 4

   Do not operate the unit until the power supply is confirmed to be correct.