Perm. Com. error inverter — Permanent communication fault with inverter

What does 100 mean?

There is a permanent communication fault with the inverter, which is a critical component for compressor operation. This will block the compressor.

• Communication cables to the inverter are incorrect or incorrectly installed.
• Fault in the communication circuits within the inverter or associated control cards.
• The inverter itself may be faulty or unpowered.

Click steps to track your progress.

1. 1

   Turn off the Heat Pump at the main power supply for at least 30 seconds.

2. 2

   Inspect all communication cables connecting the inverter to the main control unit for secure and correct connections.

3. 3

   Restore power to the Heat Pump and check if the alarm clears.

4. 4

   If the alarm persists, contact a qualified NIBE service technician immediately, as this affects the core function of the Heat Pump.