Daikin Outdoor Heat Pump RXS20G2V1B9

Check the connection of connector

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

Check the motor control voltage (pins 4 - 3)

Check the rotation command voltage (pins 4 - 2)

Check the rotation pulse (pins 4 - 1)

Sign off on the fan motor connector output check

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

Thermistors disconnected from the PCB?

Enter the resistance of Thermistor 1

Enter the resistance of Thermistor 2

Enter the resistance of Thermistor 3

Refer to the table and graph for normal temperature and resistance relationship

Are the resistance readings within the normal range?

Sign off on the thermistor resistance check

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

Remove the sound blanket (top). Since the piping ports are torn easily, remove the sound blanket carefully.

Untie the string and open the sound blanket (outer).

Lift and remove the sound blanket (outer).

Pull the sound blanket (inner) out.

Pull the sound blanket (bottom) out.

Sign off on the sound blanket removal

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

Take care not to cut your finger by the fins of the outdoor heat exchanger.

1 Remove the screw of the stop valve cover. Pull down the stop valve cover and remove it.

The stop valve cover is united with the shield plate.

When reassembling, make sure to fit the 5 hooks.

2 Remove the 2 screws and lift the top panel.

EV connector correctly connected to the PCB

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

Continuity confirmed when connector is disconnected and checked with a tester

Check the continuity between the pins

EV coil is not faulty if there is continuity between the pins

Outdoor unit PCB is not faulty if continuity is confirmed

Note: The latching sound varies depending on the valve type

Sign off on the electronic expansion valve check