Daikin Inverter Heat Pump Outdoor Unit RXS12LVJU

Warning: This procedure requires trained personnel with PPE!

Install the inverter checker instead of a compressor

Charged voltage of the built-in smoothing electrolytic capacitor dropped to 10 VDC or below?

Terminals removed from the compressor?

Terminals connected to the terminals of the inverter checker without touching each other?

If the terminals of the compressor are not FASTON terminals, connect wires available on site to the outdoor unit from output side of PCB

Power transistor test operation activated from the outdoor unit?

Diagnose according to 6 LEDs lighting status

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

Remove the sound blanket (top). Since the piping ports are torn easily, remove the sound blankets carefully.

Untie the string and open the sound blanket (outer).

Lift and remove the sound blanket (outer).

Pull out the sound blanket (inner).

Pull out the sound blanket (bottom).

Sign off on the sound blanket removal

Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work.;1. Remove the main PCB and the forced operation button PCB.

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.

4 Pull out the forced operation button PCB.

Disconnect the connector [S110] to remove the forced operation button PCB.

Be careful of a sharp protrusion at the back of the forced operation button PCB.

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