Haier 1U12BE2ERA Service Manual page 126

11.4.11 Loss of synchronism detection
Inverter side current detection is abnormal
Outdoor diplay
Method of
malfunction detection
Malfunction detection
conditions
Supposed causes
Troubleshooting
Within 3 minutes after the machine is
supplied with power and turned on with
the remote controller, check whether
the compressor can start up
At first, the compressor start up ,soon the
compressor stopped with the LED1 on the
outdoor PCB blinks 1Hz 19/18 times
Maybe there is some disturbance
LED1 flash 18 times
LED1 flash 19 times
The position of the compressor rotor can not detected normally
when the wiring of compressor is wrong or the connection is poor; or the compressor
is damaged
Faulty The wiring of compressor
Faulty compressor
Faulty PCB
* Caution
Be sure to turn off power switch before connect or disconnect connector,
parts damage may be occurred.
YES
NO
1. The wiring of compressor is incorrect
or the connection is poor;
2. The compressor is damaged
YES
IPM Module is damaged and needs
replacing.
Malfunction unsolved
the Malfunctions
compressor is damaged replace a
new one
58
Circuit diagrams
or else
exist also, the
Domestic air conditioner