Mitsubishi Air Conditioner PURY-EP250YLM-A

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

(2) Remove the pressure sensor connector in trouble from the control board, and insulate the connector.

1) Liquid-side pressure sensor (CNP1).

2) Intermediate-part pressure sensor (CNP3).

(3) Attach a new pressure sensor to the place which is shown in the figure, and insert the connector to the control board.

When gas leaks from the pressure sensor, repair the leak, and follow the instructions above if required.;

Note: Secure enough service space in the ceiling for welding operation, and conduct the work carefully. If required, dismount the unit from the ceiling, and conduct the work.

Sign off on the disassembling process

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

Sign off on the compressor disassembling

Instructions for replacing service parts for Solenoid valve block ASSY (SV4a, SV4b, SV4d), Check valve (CV4a, CV6a, CV8a, CV9a)

Select the check valve to be serviced

Precautions for starting replacement

No refrigerant in the outdoor unit

Check valve (CV4a, CV6a, CV8a, CV9a) replacement procedures

Solenoid valve block ASSY removed

I-L parts debrazed and Check valve ASSY removed

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?