Haier HSU-18LEK03/R2 Service Manual page 54

7.4.6 Over-current of the compressor
Outdoor Display LED1 flash 3 or 24 or 25 times
Method of The current of the compressor is too high
Malfunction
Detection
Malfunction when the IPM Module is damaged
Decision or the compressor is damaged
Conditions power supply. voltage is too low or too high
Supposed ■ Faulty IPM Module
Causes ■ Faulty compressor
■ Faulty power supply
Troubleshooting * Caution Be sure to turn off power switch before connect or disconnect connector, or
Electrify the machine again and turn it on
with the remote controller,If malfunctions
are reported before or upon the compressor
being started up,
The compressor is started normally, but
malfunctions are reported after it has
run for some time. Check the power
supply is too low or too high
the system may have been over or under charged
with gas, which can be judged through the
pressure of the measuring system.
parts damage may be occurred.
NO
NO
NO
52
YES
IPM Module is damaged and
needs replacing.
Yes
Repair the power supply
Domestic Air Conditioner
Service Diagnosis