Indoor/Outdoor Unit Communication Error (Outdoor Receiving)

What does E8 (6810) mean?

The outdoor controller circuit board fails to receive any signal normally for 10 minutes. This can be caused by contact failure in the indoor/outdoor unit connecting wire, defective communication circuits in either the outdoor controller board or the indoor controller board, or noise interference within the indoor/outdoor unit connecting wire.

• Outdoor unit fails to receive communication signals from indoor unit.
• Damaged or disconnected communication wiring.
• Faulty indoor unit control board.
• Interference on the communication line.

Click steps to track your progress.

1. 1

   Check for disconnection or looseness of the indoor/outdoor unit connecting wire at both the indoor and outdoor units.

2. 2

   Turn the power off, then on again. If the abnormality reappears, replace the indoor controller board or outdoor controller circuit board.