..8 Power Supply Over or under voltage fault
Outdoor display: LED1 flash 6 times The power supply is over voltage
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 else
parts damage may be occurred.
Electrify the machine again and turn it on with
the remote controller. Check whether the
compressor is started normall
Is it ok?
Yes
Maybe there is some disturbance
NO
No
~230 is ok?
Yes
Yes
This question may be caused by the power. Repair
the power supply.
NO
Change the IPM module
Change the IPM module
Test the outdoor power supply
(+310VDC) with a multimeter.
check whether the power
is >150 V or <390V?
Service diagnosis
Domestic air conditioner
Conditions
Supposed
Causes
Troubleshooting
Method of
malfunction detection
Malfunction detection
conditions
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