Mitsubishi Air Conditioner PURY-EP200YLM-A

Warning: Ensure the main power supply is OFF and no refrigerant is in the outdoor unit before starting replacement.

Select the check valve to be serviced

Was the Solenoid valve block ASSY removed successfully?

Were the I-L parts debrazed and the Check valve ASSY removed?

Was the Check valve replaced while it was removed from the unit?

Were the pipes brazed according to the angle of the pipes on the figure?

Was the Solenoid valve block ASSY, coil cover, and peripheral cables mounted back in place?

Precautions for replacing Check valve: Perform no-oxidation brazing when brazing. Place a wet towel on the Check valve when heating pipes to keep the temperature of the valve from exceeding 120oC. After brazing, check the condition around the brazing. After confirming no leakage, evacuate the air inside. Perform carefully with the flame direction so that it does not burn cables and plates etc. in the unit. Remove the brazing part protecting heat exchanger not to be burn, and replace the service parts.

Sign off on the check valve disassembling

(1) To check the inside of the control box, remove the two lock nuts on the control box cover.

1) Check the terminal connection of the power wire or of the transmission line.

(2) When the control board is replaced, the followings must be noted.

(1) Check that the board type is G1,GA1(HA1), or GB1(HB1).

(2) Check that the wire and the connector are properly connected.

It is not required to remove the two fixing screws on the control box when checking the inside.;

Warning: This procedure requires trained personnel with PPE!

For the pressure sensors PS1 and PS3, refer to steps 1 and 2

Pressure sensor connector in trouble removed from the control board

New pressure sensor attached to the correct place

Connector inserted to the control board

Gas leaks from the pressure sensor?

Warning: This procedure requires trained personnel with PPE!

Is there no refrigerant in the outdoor unit?

Remove each part according to the 1)-3) procedures on the figure above right before replacing service parts.

Mount the removed parts back in place in a reversed procedure of 1)-3) on the figure next page after replacing service parts.

Solenoid valve block ASSY (SV4a, SV4b, SV4d) replacement procedures.

To remove Solenoid valve block ASSY.

Solenoid valve block coil cover, Solenoid valve coil, and peripheral cables removed?

Screw (M5) that fixes the supporting plate for Solenoid valve block and the unit base removed?

Remove both the top and bottom service panels (front panels)

Remove the control box and the compressor cover (front)

Remove the wires that are secured to the frame,and remove the frame

Remove the compressor cover (top)

Remove the compressor wires, compressor cover, and the right

Place protective materials on the insulation lining of the compressor cover and on the sealing material, on the compressor suction pipe to protect them from the torch flame, debraze the pipe, and replace the compressor