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Haier air conditioner Edition: 20070116
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F21: Frost-removing temperature sensor failure CN10
F25: Exhaust temperature sensor failure CN11
F6: Ambient temperature sensor failure CN9
Pull the sensor out of the mainboard
1) Measure the value of resistance
between its two jumpers
2) Measure the temperature at the
room temperature sensing head.
Check the specifications of the
sensor to decide whether the sensor
is damaged or not?
Firstly check whether Terminal
CN10 (or CN11, or CN9) on
the out doormainboard
contact well or not?
Pull out the terminals on the
outdoor mainboard and reinsert
them.
No
Sensor is broken
Replace with a new sensor
Yes
Yes
The Outdoor PCB is broken
Replace with new outdoor PCB
No