Daikin Cooling-Only Outdoor Unit RKS42G2V1B

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

Voltage between (+) and (–) of the diode bridge (DB1) is approx. 0 V?

Disconnect the compressor harness connector from the outdoor unit PCB. To disengage the connector, press the protrusion on the connector.

Compressor harness connector successfully disconnected?

Measure resistance between the terminals of the DB1 and the terminals of the compressor with a multi-tester.

Enter the resistance measurement

Is the resistance measurement within the acceptable range?

Sign off on the power module check

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

Remove the screw and remove the electrical box cover.

Preparation: Remove the panels according to the “Removal of Outer Panels”. Remove the electrical box according to the “Removal of Electrical Box”.

Detach the insulation sheet. The trimmed part goes front.

Remove the 2 screws of the earth terminals.

Release the earth wire from the hook.

Remove the 2 screws and detach the 1 clip to remove the radiation shield plate.

Cut off the 5 clamps and disconnect the wire harnesses.

Remove the 8 screws in total to remove the PCB.

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

Remove the 2 screws to remove the top panel, and 8 screws to remove the front panel. The front panel has 4 hooks.

Remove the 4 screws and remove the discharge grille. When reassembling, make sure to fit the 4 hooks.

Remove the screw and remove the stop valve cover. The stop valve cover is united with the shield plate. When reassembling, make sure to fit the 5 hooks.

Sign off on the outer panel removal

Warning: This procedure requires trained personnel with PPE!

Control voltage between pins 3 - 4

Rotation command voltage between pins 2 - 4

2 pulses output at pins 1 - 4 when fan motor is rotated 1 turn by hand