Indoor Fan Starts Operating But The Compressor Does Not Operate - Daikin RXM20R Service Manual

3 | Troubleshooting

3.6.7 Indoor fan starts operating but the compressor does not operate

Service manual
46
Check item
Is the outdoor unit installed under such
conditions that short circuit easily
occurs?
Is there a shortage of refrigerant?
Check
Check the power supply.
Check the thermistor.
Check PCB's HAP LED's (if applicable).
Check the magnetic switch.
Check the power transistor.
Check the compressor.
Check the outdoor temperature.
Detail
Visual inspection
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 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, 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.
RXM20~71R(9) + ARXM25~71R(9) + FTXM20~71R + ATXM25~50R +
FVXM25~50A
Split New Perfera R32
ESIE20-11B – 2022.02