Alarm 190 - Inverter Communication Error

What does 190 mean?

The unit controller cannot communicate with the inverter. Compressor operation will be disabled until communication is restored.

• Communication cable between inverter and M3 unit controller is faulty
• M3 unit controller is defective
• Inverter is defective

Click steps to track your progress.

1. 1

   Replace the communication cable between the inverter and the M3 unit controller.

2. 2

   If the alarm continues, replace the M3 unit controller.

3. 3

   If the alarm continues, replace the inverter.