Daikin Outdoor Heat Pump RXS50G2V1B

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.

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.

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.

Heat up the 2 brazed parts of the electronic expansion valve and remove it.

With the power on, operation off, and the connector connected, check the following

Output voltage of about 5 V between pins 1 and 3

Generation of 3 pulses between pins 2 and 3 when the fan motor is operating

If NG in step 1 or 2, choose the defective part

If OK in both steps 1 and 2, choose the part to replace

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

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

Disconnect the connectors from the service monitor PCB [S52] [S102].

Detach the 4 clamps with pliers.

Remove the screws of the terminal board and the earth wire.

Unfasten the hook on the right.

Disconnect the 2 connectors for the reactor [HR1] [HR2].

Control voltage between the pins 3 - 4

Rotation command voltage between the pins 2 - 4

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

Upload a photo of the outdoor unit PCB

Sign off on the Rotation Pulse Input on the Outdoor Unit PCB Check

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

Removed the 4 screws and lifted the top panel.

Removed the 4 screws and removed the discharge grille.

Removed the 6 screws of the front panel.

Pushed the front panel and lifted the shield plate to unfasten the hooks.

Unfastened the left side hooks, and then the right side hook.

Lifted the front panel while pushing the left side panel inwards.

Lifted the front panel and unfastened the right side hook.