The error code ' F1' means the indoor unit PCB and outdoor unit PCB cannot communicate with each other.
To fix the problem you can do the following:
- Check all connections are clean and tight. Corrosion on connections can cause this error, use light abrasive paper to clean each one.
- Check the connections are connected to the correct place, wiring diagrams are printed inside the indoor unit and in the outdoor unit PCB case.
- Check for any breaks in the black communication wire, if chock blocks or rotary isolators are used then check the connections are properly connected and the isolator is turned on
After checking everything - all the connections are clean, tight and correct - then that means there is a problem with the PCB. You'll need to replace both the indoor and outdoor PCB. You can do this by contacting us via email at email@example.com or call us at 0370 3344 556.