Daikin Outdoor Heat Pump ARXS42G2V1B

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

Disconnect the lead wires of the compressor.

Unfasten the hooks with a flat screwdriver to remove the overload protector.

Remove the 2 nuts of the compressor.

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.)

Warning: Since it may happen that the refrigerant oil in the compressor catches fire, prepare wet cloth so as to extinguish fire immediately.

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

Disconnect the connecting wires

Remove the 3 screws to remove the wiring fixture

Remove all screws to disconnect the power supply cables and the connecting wires

Release the outdoor temperature thermistor

Lift up the guard net and remove it

Remove the 7 screws, and remove the right side panel

Remove the screw of the terminal board

Disconnect the connector for the fan motor [S70]

EV connector correctly connected to the PCB

EV generates latching sound when power is turned off and on

Continuity confirmed when connector is disconnected and checked with a tester

Check continuity between the following pins

If no continuity between pins, EV coil is faulty

If continuity confirmed, outdoor unit PCB is faulty

Note: Latching sound varies depending on the valve type

Sign off on the electronic expansion valve check

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

Detach the four way valve coil and the 2 clamps, and then detach the wire harnesses.

Remove the screw and remove the four way valve coil.

Pull out the electronic expansion valve coil.

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

Be sure to apply nitrogen replacement when heating up the brazed part.