Daikin Outdoor Heat Pump ARXS25G2V1B

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

Is the compressor harness connector disconnected from the outdoor unit PCB?

Enter the resistance between the terminals of the DB1

Enter the resistance between the terminals of the compressor

Are the measurement results within the acceptable range?

Sign off on the power module check

Disconnect the connectors of the thermistors from the PCB

Thermistors disconnected successfully

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

Connector for the PCB disconnected successfully

Measure the resistance of the thermistor mounted on the PCB

Sign off on the thermistor resistance check

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

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

1. Remove the reactor. Preparation

Remove the outer panels according to the “Removal of Outer Panels / Fan Motor”.

Remove the electrical box according to the "Removal of Electrical Box".

1 Remove the screw and remove the reactor.

2 The partition plate has a hook on the lower side. Lift and pull the partition plate to remove.

When reassembling, fit the lower hook into the bottom frame.;

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

Pull out the electronic expansion valve coil.

Disconnect the lead wires of the compressor.

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.