E31 - Duplication of indoor unit address number or outdoor unit address setting error

What does E31 mean?

This error indicates that an indoor unit has a duplicate address number (U00-U47) or there is an error in the outdoor unit's address setting. Each unit must have a unique address in a multi-system setup.

• Two or more indoor units configured with the same address.
• Incorrect address setting for an outdoor unit.
• Installation error during system setup.

Click steps to track your progress.

1. 1

   Turn off the entire system at the main power supply.

2. 2

   Wait 30 seconds, then restore power.

3. 3

   If you are an installer, carefully check and verify the address settings of all indoor and outdoor units according to the installation manual.

4. 4

   If the error persists, contact a qualified technician to correct the addressing configuration.