Daikin Perfera ARXM25A Service Manual page 42

3 | Troubleshooting
Check
Check for refrigerant shortage
Check if the set temperature is appropriate. thermostat "off" can be activated, set the
Check the type of the indoor and outdoor
units.
Check if the air filter/heat exchanger is
clogged.
Check the flap position.
Check the fan speed.
Service manual
42
draft – 21/12/2023 13:09
Detail
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.
appropriate temperature.
Is the indoor unit type compatible with the
outdoor unit?
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.
In cooling:
▪ If it is upward, this is good for cooling the
room but the customer may not feel the
cold air. So, the falp angle can be changed
to mid position or AUTO.
▪ If it is downward, there are two
possibilities. The indoor ambient will not
be cold homogeneously
customer will complain due to cold air.
So, the flap angle can be changed to
higher position or Auto.
In heating:
▪ If it is upward, the indoor ambient will
not be heated homogeneously and the
customer will complain due to cold
temperature. So, the flap angle can be
changed to lower position or Auto.
It should be auto ot manual setting lower
than HIGH for cold air preference.
RXM20~50A + ARXM25~50A + FTXM20~50A + ATXM20~50A + CTXM15A
Possible to be checked
by DCS Residential
No
Yes
See details on the left.
Yes
Yes
No
Yes
See details on the left.
Yes
and the
Yes
Split Perfera ZETA R32
ESIE23-06 – 2023.12