Daikin Indoor Wall Mounted Unit FTXN12KEVJU

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

Terminals of the compressor disconnected

Warning: Be careful not to burn yourself 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 a wet cloth so as to extinguish fire immediately.

Caution: For environment protection, do not discharge the refrigerant gas in the atmosphere. Make sure to collect all the refrigerant gas.

Piping restored by nonoxidation brazing

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

1. Remove the right side panel.

Remove the panels according to the “Removal of Outer Panels”.

1 Release the outdoor temperature thermistor from the outdoor heat exchanger.

2 Remove the screw on the rear side of the right side panel.

3 Remove the 4 screws on the right side panel.

4 Unfasten the hook on the rear side.

When reassembling, make sure to fit the hook.

EV connector correctly connected to the PCB

Did the EV generate latching sound after power cycle

Continuity confirmed when connector is disconnected

Check the continuity between the pins

Note: The latching sound varies depending on the valve type

1. Check the connection of connector.

2. Check the motor power supply voltage output (pins 4 - 7).

3. Check the motor control voltage (pins 4 - 3).

4. Check the rotation command voltage (pins 4 - 2).

5. Check the rotation pulse (pins 4 - 1).

Fan motor wire breakdown / short circuit check

1. Check the connector for connection.

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

Remove the screw and four-way valve coil.

Disconnect the terminals of the compressor.

Remove the electronic expansion valve coil.

Before working, make sure that the refrigerant gas is empty in the circuit.