Abnormity Diagnose - Haier EST10XCM Service Manual

7. Abnormity Diagnose

1. Sensor Diagnose:
2 seconds after the sensors open circuit or short circuit, the unit will turn off automatically and the LED will show
E0 until the sensors resume.
Firstly check whether Terminal CN2 on
the indoor mainboard contact well or
not?
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 deside whether the sensor is
damaged or not?
The Indoor PCB is broken.
YES
NO
NO
Pull out the terminals on the indoor
mainboard and reinsert them.
YES
Replace with new sensor.
YES
Replace with new indoor PCB
13
Abnormity Diagnose
Domestic Air Conditioner