F4 / Outdoor LED1 flashes 8 times — Compressor discharging temperature protection

What does F4 mean?

The temperature of the compressor's discharge line is too high, activating a safety protection to prevent overheating and damage to the compressor.

• Outdoor PCB issue
• Discharge sensor issue

Click steps to track your progress.

1. 1

   Ensure the outdoor unit is not exposed to direct sunlight for extended periods without shade.

2. 2

   Check for any obstructions around the outdoor unit that might impede heat dissipation.

3. 3

   Clean the outdoor coil if it's dirty, as this can lead to overheating.

4. 4

   Turn off the unit at the main power switch, wait 10 minutes, then restart.

5. 5

   If the issue persists, contact a qualified technician.