What does 5387 mean?

This alarm indicates that the internal temperature sensor in the inverter's PFC module has exceeded 80°C, signifying that the compressor driver is overheating.

• Poor heat transfer to the cooling coil (e.g., loose screw mountings).
• Defective inverter.

Click steps to track your progress.

1. 1

   Note the alarm code 5387.

2. 2

   Contact a qualified Bosch Heat Pump installer or service technician.

3. 3

   The technician will check the cooling coil's mountings and diagnose the inverter for potential replacement.