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Troubleshooting
Service manual
45
RXJ20~50A + FTXJ-A(W)(S)(B)
Split Emura 3 R32
ESIE22-04 – 2022.04
Check item
Detail
Is the outdoor unit installed under such
conditions that short circuit easily
occurs?
Visual inspection
Is there a shortage of refrigerant?
Conduct refrigerant collection and
vacuum drying, and then add proper
amount refrigerant.
3.6.7 Indoor fan starts operating but the compressor does not operate
Check
Detail
Check the power supply.
▪
Is the rated voltage (± 10%) supplied?
▪
Check the insulation of the electric
system.
Check the thermistor.
▪
Connection with PCB.
▪
Output.
Check PCB's HAP LED's (if applicable).
▪
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.
Check the magnetic switch.
Check the power transistor.
Check the compressor.
▪
Defective contact.
▪
Defective compressor.
▪
Defective protection thermostat.
Check the outdoor temperature.
▪
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.
draft – 22/04/2022 08:50
