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: Disconnect the connectors of the thermistors from the PCB before proceeding

Thermistors disconnected from the PCB?

Measure the resistance of each thermistor using tester

Select the model of the thermistor

For the models in which the thermistor is directly mounted on the PCB, disconnect the connector for the PCB and measure.

Thermistor disconnected from the PCB for direct mounted models?

Measure the resistance of the directly mounted thermistor

Sign off on the thermistor resistance check

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

Warning: This procedure requires trained personnel with PPE!

Enter the power supply waveform measurement between No. 1 and No. 2 on the terminal board

Is the power supply waveform a sine wave?

Is there waveform disturbance near the zero cross?

Sign off on the power supply waveforms check

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.