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ONE TO 3/4 TYPE:
4-Way valve
Communication
11.3 Examples of repairing
11.3.1 Display E1 or E2
Reasons:
1) The sensor connection terminal loose or not plugged in.
Solution: Check the connecter of sensor and slot (CN6, CN6-1, CN6-2), if loose or not plugged in,
please connect again.
2) Room temperature sensor (IRT) and Indoor pipe (coil) temperature sensor (IPT) damage (short or
broken).
Solution: check the resistance of the sensor wall type R (25℃) =5 kΩ, cassette and duct type R
(25℃) =5 kΩ, if short or broken please replace it.
Air Conditioner Service Manual
Expansion
Sensor
valve
circuit LP HP Motor
Switch power supply
Filter circuit for
heavy current
Cassette type/Duct type
Compressor
driving
Rectifying filtering
circuit
Wall type
EEPROM
36
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