F4 — Outdoor unit EEPROM error

What does F4 mean?

An error has been detected in the outdoor unit's EEPROM (Electrically Erasable Programmable Read-Only Memory). This memory stores important configuration data.

• Corrupted data in the EEPROM
• Failure of the EEPROM chip
• Power supply issues affecting the EEPROM

Click steps to track your progress.

1. 1

   Ensure the unit has stable power.

2. 2

   Try resetting the unit by turning off the power at the breaker for at least 30 seconds, then turning it back on.

3. 3

   If the error persists, the EEPROM may need to be reprogrammed or replaced by a technician.