Alarm Wrong combination of indoor and outdoor units — Unit mismatch

What does 5522 mean?

This alarm indicates that the setting of the rotary encoder on the installer board does not match the installed heat pump or indoor unit.

• Non-matching combination of heat pump and indoor unit.
• Incorrect setup of the rotary encoder on a replaced I/O module.

Click steps to track your progress.

1. 1

   Verify that the installed heat pump and indoor unit are compatible according to the documentation.

2. 2

   Check and correct the rotary encoder setting on the installer board to match the installed units.

3. 3

   If the I/O module was recently replaced, ensure the rotary encoder is set up correctly based on the old module's settings or the installer guide.