Error 20 — Signal transmission error

What does err 20 mean?

This error code indicates a problem with the signal transmission between the indoor and outdoor units. It might mean the communication line is interrupted or faulty.

• Loose or damaged wiring between indoor and outdoor units
• Electrical interference affecting the signal
• Faulty communication board in either unit

Click steps to track your progress.

1. 1

   Check that the power to the air conditioner is turned off.

2. 2

   Inspect the wiring connections between the indoor and outdoor units for any visible damage or loose connections.

3. 3

   If the wiring appears intact, turn the power back on and see if the error clears.

4. 4

   If the problem persists, contact a qualified installer or dealer for further diagnosis and repair.