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

ESIE16-02K | Part 2. Troubleshooting
Check item
Is there clogging before or after the expansion valve (capillary)?
Is the check valve (if applicable) clogged?
Is there a shortage of refrigerant?
In heating mode
Check item
Does the outdoor unit fan run normally?
Is the outdoor unit heat exchanger clogged?
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 cir-
cuit easily occurs?
Is there a shortage of refrigerant?

2.3.8. 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.
Check the compressor.
Check the outdoor temperature.
31/05/21 | Version 1.1
RA R32 Split & multi split M-Series
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
Visual inspection
Visual inspection
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).
Check if there is a temperature difference before and after check
valve. If YES, the check valve is caught.
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 witch PCB.
Output.
If green led on the control PCB is not blinking, then the micropro-
cessor is not working.
If the green led on the main PCB is not blinking, then the micro-
processor 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.
2.3. Symptom based troubleshooting
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