Indoor unit communication error — Indoor unit communication issue

What does Indoor unit communication error mean?

The wired remote controller displays a communication error, indicating a problem with how the indoor unit is communicating with other parts of the system. This error will cause the system to turn off.

• The communication cable of the indoor unit is faulty or disconnected.
• The DC output voltage at the communication terminal is incorrect.

Click steps to track your progress.

1. 1

   Check the communication cable connecting the indoor unit. Ensure it is securely plugged in and not damaged.

2. 2

   Verify the DC output voltage at the communication terminal (this may require a service technician).

3. 3

   Turn off the air conditioner at the main breaker, wait 30 seconds, then turn it back on to reset the system.