TROUBLESHOOTING FOR MAIN MALFUNCTION
Indoor unit
1. Malfunction of Temperature Sensor F1, F2 Main detection points:
• Is the wiring terminal between the temperature sensor and the controller loosened or poorly contacted?
• Is there short circuit due to trip-over of the parts?
• Is the temperature sensor broken?
• Is mainboard broken?
Malfunction diagnosis process:
Start
End
Is the wiring terminal between the
temperature sensor and the controller
loosened or poorly contacted?
Is there a short circuit due to
trip-over of the parts
Replace the mainboard with the same
model.
NO
NO
YES
YES
NO
NO
YES
NO
YES
YES
Place parts upright
Replace it with a temperature
sensor of the same model
Securely insert the
temperature sensor
Has malfunction been
eliminated?
Is the temperature sensor normal
according to the resistance table?
YES
NO
Has malfunction been
eliminated?
Has malfunction been
eliminated?
