Daikin Outdoor Unit for Multi-Split System 2MXS18GVJU

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

Remove the screw and remove the four-way valve coil.

Remove the screw and remove the defrost solenoid valve coil.

Pull out the electronic expansion valve coil for each room.

Remove the discharge pipe thermistor.

Remove the putty, and remove each thermistor.

Sign off on the Coils / Thermistors Removal

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

Disconnect the compressor lead wires

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.

Disconnect the brazed part (a) at discharge side of the compressor

Disconnect the brazed part (b) at suction side of the compressor

Lift the compressor up and remove it

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

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 and disconnect the 5 brazed parts to remove the distributor.

Note: Do not use a metal saw for cutting pipes or sawdust will enter the circuit.

When withdrawing the pipes, be careful not to pinch them firmly with pliers. The pipes may get deformed.

Provide a protective sheet or a steel plate so that the brazing flame cannot influence peripheries.

Sign off on the distributor removal

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

1. Disconnect the connecting wires.

The US model has a protection plate on the right side panel.

Remove the 2 screws to remove the protection plate.

1 Remove the terminal board fixing screw.

The wires are fixed to the terminal board with screws.

2 Remove all the screws of the connecting wires and the power supply wires.

3 Remove the screw of the ground wire.

Check the connection of connector

Check motor power supply voltage output (pins 4 - 7)

Check motor control voltage (pins 4 - 3)

Check rotation command voltage output (pins 4 - 2)

Check rotation pulse input (pins 4 - 1)

Sign off on the fan motor connector check