Daikin FTXA20AW - Operation Starts and the Unit Stops Immediately; Operation Stops, Unit Cannot Start for a While

1 | Troubleshooting
Service manual
38
FTXA20~50A(W)(S)(T) + FTXA20~50B(B)(S)(T) + RXA42+50A +
RXA20~35A(9) + RXA42+50B
Split Stylish R32
ESIE18-03D – 2021.05
1.6.8 Operation starts and the unit stops immediately
Check Detail
Check the power supply. ▪ 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?
Check the refrigerant charge. ▪ Overcharge.
▪ Air in the system.
▪ Water in the system.
Check the fan motor. ▪ Check the magnetic switch.
▪ Check the overcurrent relay.
Check the four way valve coil. ▪ Is there a short circuit?
▪ Is the four way valve coil broken?
Check the outdoor PCB. ▪ Is there a short circuit?
▪ Is the outdoor PCB broken?
Check the heat exchanger. Soiled heat exchanger, obstruction.
Check the airflow. Soiled air filter, obstruction, installation
space.
1.6.9 Operation stops, unit cannot start for a while
Check Detail
Check if standby function is activated. ▪ Compressor delay timer is counting.
▪ Wait for minimum 3 minutes.
Check the power supply. ▪ Low voltage?
▪ Is the size of the power cable
sufficient?
Check the refrigerant charge. ▪ Incorrect charge.
▪ Air in the system.
▪ Water in the system.
▪ Obstruction in the system.
Check compressor. ▪ Overcurrent relay.
▪ Protection thermostat.