Alarm 437 (or 589, 216) Incorrect PCBA in Heat Pump — Wrong base board installed

What does Incorrect PCBA in heat pump 437 mean?

This alarm indicates that the Heat Pump has the wrong base board (PCBA) installed, meaning it is not suitable for the S2125 model.

• The base board has been replaced with a base board not suitable for S2125.
• Incorrect PCBA installed in the Heat Pump during manufacturing or service.

Click steps to track your progress.

1. 1

   Check the indoor module/control module display for specific action instructions.

2. 2

   Verify the model number of the Heat Pump and compare it to the installed base board (PCBA) documentation.

3. 3

   If a base board replacement was recently performed, ensure the correct part number was used.

4. 4

   Contact a qualified technician to verify the PCBA and replace it with a suitable one for S2125 if necessary.