E7 — Communication fault between indoor and outdoor units

What does E7 mean?

This error indicates a problem with the communication link between the indoor and outdoor parts of your air conditioner. It could be a wiring issue or a problem with the main circuit boards.

• Communication wiring disconnected
• Indoor PCB failure
• Outdoor PCB failure
• Power Module failure

Click steps to track your progress.

1. 1

   Check if the linking cable between the indoor and outdoor units is securely connected and insulated.

2. 2

   Ensure the power supply to the unit is stable.

3. 3

   Restart the air conditioner by turning the power off and then on again.

4. 4

   If the problem persists, contact a qualified technician to check the PCBs and wiring.