Haier HSU-09HSA03/R2(DB) Room temperature sensor failure, Heat-exchangesensor failure, No Yes

	Haier air conditioner	Edition: 20070116
E1:	Room temperature sensor failure	CN8
E2:	Heat-exchange sensor failure

Firstly check whether Terminal CN8(CN6) on the indoor mainboard contact well or not?

Yes

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?

No

The Indoor PCB is broken Replace with new indoor PCB

No

Yes

Pull out the terminals on the indoor mainboard and reinsert them.

Sensor is broken

Replace with new indoor PCB

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