Loss Of Synchronism Detection - Haier 2U14CS1ERA Service Manual

7.4.11

Loss of synchronism detection

Inverter side current detection is abnoraml
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
Causes
Troubleshooting * Caution Be sure to turn off power switch before connect or disconnect connector, or
Within 3 minutes after the machine is
supplied with power and turned on with
the remote controller,check whether
the compressor can stard up
At frist, 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
2U14CS1ERA-SM
Faulty The wiring of compressor
Faulty compressor
Faulty PCB
parts damage may be occurred.
YES
NO
YES
Malfunction unsolved
66
Service diagnosis
1. The wiring of compressor is incorrect
or the connection is poor;
2. The compressor is damaged
IPM Module is damaged and needs
replacing.
the Malfunctions exist
compressor is damaged replace a
new one
Domestic Air Conditioner
also, the