F3 / Outdoor LED1 flashes 4 times — Communication error between Power module and main PCB board

What does F3 mean?

There is a communication fault between the power module and the main PCB board within the outdoor unit, preventing proper control and operation.

• Power module issue
• Outdoor PCB issue

Click steps to track your progress.

1. 1

   Turn off the air conditioner at the main power switch or circuit breaker.

2. 2

   Wait for at least 30 seconds, then turn the power back on.

3. 3

   If the error persists, contact a qualified technician.