Haier N Series Service Manual page 62

. .11 Loss of synchronism detection
Inverter side current detection is abnormal
Outdoor Display
Method of
malfunction detection
Malfunction detection
conditions
Conditions
Supposed
Causes
Troubleshooting
At first, the compressor start up ,soon the
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, or parts
damage may be occurred.
Within 3 minutes after the machine is
supplied with power and turned on with
the remote controller, check whether
the compressor can start up
YES
compressor stopped with the LED1 on the
outdoor PCB blinks 1Hz 19/18 times
Maybe there is some disturbance
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
Domestic air conditioner
Service diagnosis
exist also, the