E09 — Indoor Unit Address Duplication Abnormality

What does E09 mean?

This error indicates that there is a conflict in the address settings for the indoor units, meaning two or more units might be set to the same address.

• Incorrect address configuration when multiple indoor units are installed.
• An accidental change in the addressing settings.
• A rare communication glitch during system startup.

Click steps to track your progress.

1. 1

   Turn off the main power to the Haier unit at the circuit breaker.

2. 2

   Wait for at least 30 seconds.

3. 3

   Restore power to the unit and check if the error code clears.

4. 4

   If the error persists, consult your installation manual to verify the correct addressing settings for all indoor units, then contact a qualified service technician if necessary.