Haier 1U12BE2ERA Service Manual page 120

11.4.6 Over-current of the compressor
Outdoor diplay
Method of
malfunction detection
Malfunction detection
conditions
Supposed causes
Troubleshooting
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.
LED1 flash 3 or 24 or 25 times
he current of the compressor is too high
when the IPM Module is damaged or the compressor is damaged.
voltage is too low or too high
Faulty IPM Module
Faulty compressor
Faulty power supply
* Caution
Be sure to turn off power switch before connect or disconnect connector, or parts
damage may be occurred..
NO
NO
NO
.
YES
YES
52
Seivice diagnosis
power supply
IPM Module is damaged and
needs replacing.
Repair the power supply
Domestic air conditioner