Haier 1U50KEPFRA-H, Руководство по обслуживанию

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Service Diagnosis
42
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.
The power supply is over voltage
The 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.
Supposed
Causes
Malfunction
Decision
Conditions
Method of
Malfunction
Detection
Trouble
shooting
Is it ok?
Test the outdoor power supply
(+310VDC) with a universal
meter. Check whether the power
is >150 V or <390V?
NO
NO
This question may be caused
by the power. Repair the power
supply.
Change the IPM module
Change the IPM module
Maybe there is some
disturbance
Electrify the machine again and turn it on
with the remote control.
Check whether the compressor is started
normally
YES
YES
YES
NO
Check whether the outdoor
Power supply is ok (L and N AC
230V)?
310
V
DC
230
V
AC