Daikin Perfera ARXM25A Service Manual page 46

3 | Troubleshooting
Check item
Does the indoor unit fan run normally?
Check if the air filter/heat exchanger is
clogged.
Is the indoor unit installed under such
conditions that short circuit easily occurs?
Is there clogging before or after the
expansion valve (capillary)?
Is the check valve (if applicable) clogged?
Check for refrigerant shortage.
Check item
Does the outdoor unit fan run normally?
the outdoor unit heat exchanger clogged?
Service manual
46
draft – 21/12/2023 13:09
In cooling mode
Detail
Visual inspection
Check if the air filter/heat exchanger is
clean by visual inspection.
If the difference between room air
temperature and the indoor heat
exchanger temperature is more than 20°C
and indoor fan frequency is more than
1000 rpm, the filter/heat exchanger is
possibly clogged.
Visual inspection
▪ Check if there is a temperature difference
before
(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.
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.
In heating mode
Detail
Visual inspection
Check if the outdoor unit heat exchanger is
clean by visual inspection.
If the difference between outdoor ambient
temperature and the outdoor unit heat
exchanger temperature is more than 20°C
and outdoor fan is working, the outdoor
unit heat exchanger is possibly clogged.
and after expansion
RXM20~50A + ARXM25~50A + FTXM20~50A + ATXM20~50A + CTXM15A
Possible to be checked
by DCS Residential
No
No
Yes
See details on the left.
No
No
valve
No
No
Yes
See details on the left.
Possible to be checked
by DCS Residential
No
No
Yes
See details on the left
Split Perfera ZETA R32
ESIE23-06 – 2023.12