Daikin Slim Duct Indoor Units FDXS50CVMB

Output voltage between pins 1 and 3

Number of pulses between pins 2 and 3 when the fan motor is operating

If NG in step 1, what is the defect?

If NG in step 2, what is the defect?

If OK in both steps 1 and 2, what is the action?

Warning: Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work.

Disconnect the lead wires of the compressor.

Release the clamp with pliers to detach the compressor lead wires.

Warning: Be careful not to get yourself burnt with the pipes and other parts that are heated by the gas brazing machine.

Warning: If the refrigerant gas leaks during work, ventilate the room. (If the refrigerant gas is exposed to flames, toxic gas may be generated.)

Warning: Since it may happen that the refrigerant oil in the compressor catches fire, prepare wet cloth so as to extinguish fire immediately.

Caution: From the viewpoint of global environment protection, do not discharge the refrigerant gas in the atmosphere. Make sure to collect all the refrigerant gas.

EV connector correctly connected to the PCB

EV generates latching sound when power is turned off and on

Continuity confirmed when connector is disconnected and tested

Check the continuity between the pins

Note: The latching sound varies depending on the valve type.

Sign off on the electronic expansion valve check

Warning: Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work.

Remove the screw and remove the four way valve coil.

Warning: Be careful not to get yourself burnt with the pipes and other parts that are heated by the gas brazing machine.

Warning: If the refrigerant gas leaks during work, ventilate the room. (If the refrigerant gas is exposed to flames, toxic gas may be generated.)

Caution: From the viewpoint of global environment protection, do not discharge the refrigerant gas in the atmosphere. Make sure to collect all the refrigerant gas.

Cautions for restoration: 1. Restore the piping by nonoxidation brazing.

2. It is required to prevent the carbonization of the oil inside the four way valve and the deterioration of the gaskets affected by heat. (Keep below 120°C.) For the sake of this, wrap the four way valve with wet cloth and provide water so that the cloth does not dry.

Note: Do not use a metal saw for cutting pipes by all means because the sawdust comes into the circuit.

When withdrawing the pipes, be careful not to pinch them firmly with pliers. The pipes may get deformed.

Warning: Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work.

Removed the electrical box cover

Removed the screw of the shield plate

Unfastened the 2 hooks and removed the shield plate

Unfastened the 4 hooks of the electrical box cover and removed it

Disconnected the connector for the fan motor [S70]

Released the fan motor lead wire from the 7 hooks

Removed the washer fitted nut of the outdoor fan

Removed the lower 2 screws from the fan motor first