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Outdoor display: LED1 flash 6 times The power supply is over voltage
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 Ŷ
Supply voltage not as specified.
Causes Ŷ
The IPM module is broken.
Troubleshooting
* Caution
Be sure to turn off power switch before connect or disconnect connector, or else
parts damage may be occurred.
Turn on the unit.
Check whether the compressor running normal?
Is it ok?
Yes
The power supply is instability.
NO
No
Check whether the outdoor
powersupplyisok?
Yes
Yes
This question may be caused by the power. Repair
the power supply.
NO
Replace power module
Replace power module
Test the power supply of P & N
terminal on outdoor PCB.
check whether the power is >390V
or <150V?
Domestic air conditioner
41
Seivice diagnosis
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