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Technical Information
YES
NO
Replace the outdoor mainboard
YES
F1 Malfunction of Evaporator Temperature Sensor
Disconnect the temperature
sensor and measure if its
resistance is normal
Check if the evaporator
temperature sensor on mainboard
is inserted on the needle stand
correctly
YES
Correctly insert the temperature
sensor on the needle stand
F2 Malfunction of Condenser Temperature Sensor
Disconnect the temperature
sensor and measure if its
resistance is normal
Malfunction of condensor
temperature sensor
Correctly insert the
temperature sensor on
the needle stand
Replace the
temperature sensor
Check if the condenser
temperature sensor on mainboard
is inserted on the needle stand
correctly
YES
Replace the indoor mainboard
NO
Replace the temperature sensor
NO
NO
Malfunction of evaporator
temperature sensor