Daikin Cooling-Only Outdoor Unit RKS25G2V1B

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

You can remove the main PCB when you disconnect the lead wires on the terminal board without removing the electrical box.

2 Remove the screw on the terminal board.

3 Release the 2 earth terminals.

5 Unfasten the 3 hooks on the upper side.

6 Lift and pull out the main PCB.

Warning: This procedure requires trained personnel with PPE!

Control voltage between pins 3 - 4

Rotation command voltage between pins 2 - 4

Outdoor fan motor functioning properly?

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.

Warning: This procedure requires trained personnel with PPE!

Enter the power supply waveform measurement between No. 1 and No. 2 on the terminal board

Is the power supply waveform a sine wave?

Upload a photo of the waveform (Fig.1)

Is there waveform disturbance near the zero cross?

Upload a photo of the waveform disturbance near the zero cross (Fig.2)

Sign off on the power supply waveforms check

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

Preparation: Remove the panels and disconnect the connector for the fan motor according to the “Removal of Outer Panels / Fan Motor”.

Disconnect the 2 connectors for the reactor.

Disconnect the connector for the compressor [S30].

When reassembling, coil the excessive lead wire and hang the loop on the hook.

Disconnect the connectors for the magnetic relay [S50] and for the thermistors [S90].

Disconnect the connectors for the filter PCB [S10] and for the overload protector [S40].

Disconnect the connectors for the electronic expansion valve coil [S20] and for the four way valve coil [S80].