Power Supply Over Or Under Voltage Fault - Haier D-Series Service Manual

10.4.8 Power Supply Over or under voltage fault

Outdoor display:
Method of
Malfunction Detection
Malfunction
Detection Conditions
Supposed Causes
Troubleshooting
Electrify the machine again and turn it on with
the remote controller. Check whether the
compressor is started normally
Test the outdoor power supply
(+310VDC) with a multimeter.
check whether the power
is >150 V or <390V?
This question may be caused by the power. Repair
the power supply.
LED1 flash 6 times
An abnormal voltage rise or fall is detected by checking the specified voltage detection
circuit.
An voltage signal is fed from the voltage detection circuit to the microcomputer
■ Supply voltage not as specified
■ the IPM module is broken
■ the outdoor PCB is broken
* Caution Be sure to turn off power switch before connect or disconnect connector, or
Is it ok?
No
NO
Yes
~230 is ok?
NO
The power supply is over voltage
else parts damage may be occurred.
Yes
Maybe there is some disturbance
Yes
Change the IPM module
Change the IPM module
46
Seivice diagnosis
Domestic air conditioner