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10.4.8
Power Supply Over or under voltage fault
Outdoor display: F19 LED1 flash 6 times
An abnormal voltage rise or fall is detected by checking the specified voltage detection circuit.
Method of
The power supply is over voltage
Malfunction
Detection
Malfunction
The voltage signal is fed from the voltage detection circuit to the microcomputer
Decision
Conditions
Supposed
Causes
Trouble
* Caution:
shooting
or else parts damage may be occurred.
Electrify the machine again and turn it on
with the remote control.
Check whether the compressor is started
normally
Test the outdoor power supply
(+310VDC) with a universal
meter. Check whether the power
is >150 V or <390V?
Check whether the outdoor
Power supply is ok (L and N AC
230V)?
This question may be caused
by the power. Repair the power
supply.
Supply voltage not as specified
the IPM module is broken
the outdoor PCB is broken
Be sure to turn off power switch before connect or disconnect connector,
Is it ok?
NO
NO
NO
YES
Maybe there is some
disturbance
YES
Change the IPM module
YES
Change the IPM module
V
230
AC
39
Service Diagnosis
V
310
DC
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