Indoor Fan Starts Operating But The Compressor Does Not Operate; Operation Starts And The Unit Stops Immediately; Operation Stops, Unit Cannot Start For A While; Unit Discharges White Mist - Daikin Comfora FTXP20~71L2V1B Service Manual

1 Troubleshooting
Check item
Is there clogging before or after
the expansion valve (capillary)?
Is the check valve clogged?
Is the refrigerant gas short?
1.6.7 Indoor fan starts operating but the
compressor does not operate
Check
Check the power supply.
Check the thermistor.
Check PCB's.
Check the magnetic switch.
Check the power transistor.
Check the compressor.
Check the outdoor temperature.
Service manual
16
Detail
▪ Check if there is a temperature
difference before and after
expansion valve (capillary).
▪ Check if the main valve unit of
expansion valve operates (by
noise, vibration).
after check valve. If YES, the
check valve is caught.
Conduct refrigerant collection
and vacuum drying, and then
add proper amount refrigerant.
Detail
▪ Is the rated voltage (± 10%)
supplied?
▪ Check the insulation of the
electric system.
▪ Connection witch 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, then the
microprocessor is not working.
▪ Defective contact.
▪ Defective compressor.
▪ Defective protection
thermostat.
▪ Heating operation cannot be
used when the outdoor
temperature is 18°C WB or
higher.
▪ Cooling operation cannot be
used when the outdoor
temperature is below
10°C DB.
1.6.8 Operation starts and the unit stops
immediately
Check
Check the power supply.
Check the refrigerant charge.
Check the fan motor.
Check the four way valve coil.
Check the outdoor PCB.
Check the heat exchanger.
Check the airflow.
1.6.9 Operation stops, unit cannot start for a
while
Check
Check if standby function is
activated.
Check the power supply.
Check the refrigerant charge.
–
Check compressor.
1.6.10

Unit discharges white mist

Check
Check installation conditions.
Check installation conditions.
Air filter.
Fan motor.
ATXP20~35L2V1B + FTXP20~71L2V1B + ARXP20~35L2V1B +
Detail
▪ Is the capacity of the safety
breaker as specified?
▪ If the earth leakage breaker is
too sensitive, then increase the
set value of the earth leakage
current of the breaker or
replace the breaker.
▪ Is the circuit exclusive?
▪ Is the rated voltage (± 10%)
supplied?
▪ Is there an incorrect size of
connection wiring?
▪ Overcharge.
▪ Air in the system.
▪ Water in the system.
▪ Check the magnetic switch.
▪ Check the overcurrent relay.
▪ Is there a short circuit?
▪ Is the four way valve coil
broken?
▪ Is there a short circuit?
▪ Is the outdoor PCB broken?
Soiled heat exchanger,
obstruction.
Soiled air filter, obstruction,
installation space.
Detail
▪ Compressor delay timer is
counting.
▪ Wait for minimum 3 minutes.
▪ Low voltage?
▪ Is the size of the power cable
sufficient?
▪ Incorrect charge.
▪ Air in the system.
▪ Water in the system.
▪ Obstruction in the system.
▪ Overcurrent relay.
▪ Protection thermostat.
Detail
▪ Humid site.
▪ Dirty site.
▪ Oil mist.
Dirty heat exchanger.
Dirty air filter.
Defective fan motor.
RXP20~71L2V1B
Split Comfora R32
ESIE18-01 – 2019.02