Haier HSU09 VHG(DB)-G&W Service Manual page 61

Ek-series wall mounted type air conditioner
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7.4.8 Power Supply Over or under voltagve fault
outdoor display:
LED1 flash 6 times
Method of
An abnormal voltage rise or fall is detected by checking the specified voltage detection circuit.
Malfunction
Detection
Malfunction
An voltage signal is fed from the voltage detection circuit to the microcomputer
Decision
Conditions
Supposed
■ Supply voltage not as specified
Causes
■ the IPM module is broken
■ the outdoor PCB is broken
Troubleshooting
* Caution Be sure to turn off power switch before connect or disconnect connector, or else
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.
HSU09VHG(DB)-SM
The power supply is over voltage
parts damage may be occurred.
Is it ok?
No
NO
Yes
~230 is ok?
NO
Yes
Maybe there is some disturbance
Yes
Change the IPM module
Change the IPM module
58
Domestic Air Conditioner
Service Diagnosis

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