Alarm 437 - Incorrect PCBA in Heat Pump

What does 437 mean?

The Heat Pump has detected that the wrong base board (PCBA) has been installed or that the installed base board is not suitable for the S2125 model. This indicates a hardware mismatch.

• The base board has been replaced with a base board for a different model.
• The Heat Pump has the wrong base board installed.

Click steps to track your progress.

1. 1

   Verify the model number of your Heat Pump (S2125) and ensure any installed components match its specifications.

2. 2

   Turn off the Heat Pump at the main power switch and leave it off for a few minutes, then restart.

3. 3

   If this alarm appears after a service or part replacement, immediately contact the installer or a NIBE service technician to change to the correct PCBA suitable for S2125.