What does 6840 mean?

This code refers to an A-Control fault, specifically E6 or E8, indicating communication issues between indoor and outdoor units.

• Indoor/outdoor communication error
• Incorrect power-up sequence
• Interference on communication lines

Click steps to track your progress.

1. 1

   Refer to the E6 and E8 fault code explanations.

2. 2

   Ensure the indoor unit is powered on before the outdoor unit.

3. 3

   Check communication wiring for damage or loose connections.

4. 4

   Power cycle the system.