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Check item
Is there clogging before or after the
expansion valve (capillary)?
Is the check valve (if applicable) clogged?
Is the outdoor unit installed under such
conditions that short circuit easily occurs?
Check for refrigerant shortage.
3.6.7 Indoor fan starts operating but the compressor does not operate
Check
Check the power supply.
Check the thermistor.
Check PCB's HAP LED's (if applicable).
Check the magnetic switch.
Check the power transistor.
RXM20~50A + ARXM25~50A + FTXM20~50A + ATXM20~50A + CTXM15A
Split Perfera ZETA R32
ESIE23-06 – 2023.12
Detail
▪
Check if there is a temperature difference
before
and
after
(capillary).
▪
Check if the main valve unit of expansion
valve operates (by noise, vibration).
Check if there is a temperature difference
before and after check valve. If YES, the
check valve is clogged.
Visual inspection
Diagnosis by service port pressure and
operating current
▪
Is the unit filled with the specified
refrigerant volume?
▪
Is there a flushing noise due to
refrigerant shortage?
If the difference between room air and
indoor heat exchanger temperature is less
than 4K, there is a possibility of refrigerant
shortage.
If the difference between compressor
discharge temperature and condenser
temperature is too much (range 30~50K),
there is a possibility of refrigerant shortage.
Detail
▪
Is the rated voltage (± 10%) supplied?
▪
Check the insulation of the electric
system.
▪
Connection with PCB.
▪
Output.
▪
if green led on the control PCB is not
blinking, then the microprocessor is not
working.
▪
if the green led on the main PCB is not
blinking, then the microprocessor is not
working.
▪
if first green LED on the service monitor
PCB
is
not
blinking,
microprocessor is not working.
3
|
Troubleshooting
Possible to be checked
by DCS Residential
No
expansion
valve
No
No
No
Yes
See details on the left.
Possible to be checked
by DCS Residential
No
No
No
then
the
No
No
draft – 21/12/2023 13:09
Service manual
47
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Table of Contents
Troubleshooting
