Daikin Indoor Unit Wall Mounted Type Air Conditioner FTX60KMV1B

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

Measure the resistance of each thermistor using a multimeter

If the room temperature thermistor is soldered on a PCB, remove the PCB from the control PCB to measure the resistance

Measure the resistance of the room temperature thermistor

If the connector of indoor heat exchanger thermistor is soldered on a PCB, remove the thermistor and measure the resistance

Measure the resistance of the indoor heat exchanger thermistor

Sign off on the thermistor resistance check

EV connector correctly connected to the PCB

EV generates a latching sound when power is turned off and on

Continuity confirmed when connector is disconnected and checked with a multimeter

Check the continuity between the pins

Continuity confirmed between the pins

Outdoor unit PCB (main PCB) is faulty

Sign off on the electronic expansion valve check

Warning: This procedure requires trained personnel with PPE!

Install an inverter analyzer instead of a compressor

Charged voltage of the built-in smoothing electrolytic capacitor dropped to 10 VDC or below?

Terminals removed from the compressor?

Terminals connected to the terminals of the inverter analyzer without touching each other?

Activate power transistor test operation from the indoor unit

Pressed the center of the TEMP button and the OFF button on the remote controller at the same time?

Warning: Ensure the voltage between (+) and (–) of the diode bridge (DB1) is about 0 V before proceeding

Enter the voltage between (+) and (–) of the diode bridge (DB1)

Is the voltage approximately 0V?

If voltage is not approximately 0V, stop the procedure and report the issue

Enter the resistance between the pins of the DB1

Compare the resistance with the table

Does the resistance indicate a short circuit on the main circuit?

Sign off on the main circuit short check

Ensure that the voltage of 320 + 100 V ~ 320 - 50 V is applied.

Set operation off and power off. Disconnect the connector S70 or S71.

Control voltage between the pins 3 - 4

Rotation command voltage between the pins 2 - 4

Keep operation off and power off. Connect the connector S70 or S71.

4 rotation pulses (0 ~ 15 VDC) at the pins 1 - 4 when the fan motor is rotated 1 turn by hand

If fuse is melted, check the outdoor fan motor for proper function.