Haier air conditioner
Edition: 20070116
- 42-
E1: Room temperature sensor failure
CN8
E2: Heat-exchange sensor failure
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 CN8(CN6) on
the indoor mainboard
contact well or not?
Pull out the terminals on the
indoor mainboard and reinsert
them.
No
Sensor is broken
Replace with new indoor PCB
Yes
Yes
The Indoor PCB is broken
Replace with new indoor PCB
No