Communication Error Except for Outdoor Unit

What does E0~E7 mean?

A communication error has occurred with an indoor unit or other connected device, rather than the outdoor unit itself. The specific indoor unit (0-7) experiencing the error is typically indicated by the last digit. This error prevents proper system control and coordination.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Inspect the controller board of the identified indoor unit for any visible defects.

2. 4

   Inspect the outdoor controller circuit board for any visible defects or damage, as it handles communication for all units.