Mitsubishi Air Conditioner PURY-P250YLM-A1

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.;

(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.;

R410A CITY MULTI R2 Solenoid valve block ASSY (SV4a, SV4b, SV4d), Check valve (CV4a, CV6a, CV8a, CV9a) replacement instructions.

Check that the main power supply is OFF.

Check that no refrigerant is 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.

Remove the Solenoid valve block coil cover, Solenoid valve coil, and peripheral cables.

Remove the screw (M5) that fixes the supporting plate for Solenoid valve block and the unit base.

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

1. R410A CITY MULTI R2 Solenoid valve block ASSY (SV4a, SV4b, SV4d), Check valve (CV4a, CV6a, CV8a, CV9a) replacement instructions.

* Following instructions show procedures for replacing service parts for Solenoid valve block ASSY (SV4a, SV4b,

SV4d), Check valve (CV4a, CV6a, CV8a, CV9a). Replace them properly according to the procedures.

2. Parts to be serviced, Set-content

- Check valve (CV4a, CV8a) - Service parts replacement instructions - KB00S879G23.

• Replacement instructions - WT07370X01.

- Check valve (CV6a) - Service parts replacement instructions - KB00S879G24.

• Replacement instructions - WT07370X01.