P7 - System error (Address) in indoor unit

What does P7 mean?

This error indicates a system error related to the address settings of the indoor unit, commonly found in multi-split systems.

• Incorrect addressing of indoor units.
• Duplicate address settings for multiple indoor units.
• Conflict in address settings (e.g., auto/manual/remote control addresses coexist).
• Problem with the control board's address recognition.

Click steps to track your progress.

1. 1

   Turn off the main power to the entire AC system at the circuit breaker.

2. 2

   If you have multiple indoor units, ensure each has a unique and correct address setting according to the installation manual (professional check advised).

3. 3

   Verify that there are no conflicting addressing methods (manual, auto, remote) being used simultaneously.

4. 4

   Restart the system after checking address settings. If the error persists, contact a qualified technician.