Symptom Based Troubleshooting; Operation Does Not Start; Operation Sometimes Stops - Daikin FTXA20A Service Manual

1 | Troubleshooting

1.6 Symptom based troubleshooting

1.6.1 Operation does not start

1.6.2 Operation sometimes stops

Service manual
32
Check
When the operation lamp is off, there is
a power failure.
Check the power supply.
Check the type of the indoor unit.
Check the transmission between indoor
and outdoor.
Check the outdoor temperature.
When the operation lamp blinks, there
may be an error code, activating the
protection device.
Diagnose with remote controller
indication.
Check the remote controller addresses. Are the address settings for the remote
Check the operation circuit.
Check fan motor.
Check compressor.
Check remote controller.
Check
When the operation lamp is off, there is
a power failure.
Check the power supply.
Detail
▪ Is the power supply breaker ON?
▪ Do other electrical appliances work?
▪ Is the rated voltage (± 10%) supplied?
▪ Check the insulation of the electric
system.
Is the indoor unit type compatible with
the outdoor unit?
▪ Connection wires.
▪ 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.
See "1.5 Error based
troubleshooting" [ 4 8].
controller and indoor unit correct?
▪ Is the thermal fuse blown.
▪ Are wire size and wire connections
OK?.
▪ Is the magnetic switch defective?
▪ Is the overcurrent relay defective?
▪ Is the contact defective?
▪ Is the protection
defective?
▪ Is the compressor itself defective?
▪ Are the batteries LOW?
▪ Are there incorrect settings?
Detail
▪ A power failure of 2 to 10 cycles stops
air conditioner operation.
FTXA20~50A(W)(S)(T) + FTXA20~50B(B)(S)(T) + RXA42+50A +
RXA20~35A(9) + RXA42+50B
thermostat
Split Stylish R32
ESIE18-03D – 2021.05