Haier 1U82SA2ERA, Service Manual

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.3.11 Loss of synchronism detection
Inverter side current detection is abnormal
Outdoor Display LED1 flash 18 times
LED1 flash 19 times
Method of The position of the compressor rotor can not detected normally
Malfunction
Detection
Malfunction when the wiring of compressor is wrong or the connection is poor;
Decision or the compressor is damaged
Conditions
Supposed
Ƶ Faulty The wiring of compressor
Causes
Ƶ
Faulty compressor
Ƶ
Faulty PCB
Troubleshooting * Caution Be sure to turn off power switch before connect or disconnect connector, or parts
damage may be occurred.
Turn on the unit.
Check whether the compressor can start?
1. The wiring of compressor is incorrect
or the connection is poor;
2. The compressor is damaged
Firstly, the compressor start up ,soon the
compressor stopped with the LED1 on the
outdoor PCB blinks
˄ 1Hz ˅ 19/18 times
The power module is fault, replace a new
one
the Malfunctions exist also, the
compressor is damaged replace a
new one
YES
NO
YES
Malfunction unsolved
Seivice diagnosis
Domestic air conditioner
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