Mitsubishi Air Conditioner PURY-EP400YLM-A

Warning: This procedure requires trained personnel with PPE!

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

Pressure sensor connector in trouble removed from the control board and insulated

New pressure sensor attached to the place shown in the figure and connector inserted to the control board

Gas leaks from the pressure sensor?

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

Sign off on the BC Controller Pressure Sensor Disassembling

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

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

Remove the two lock nuts on the control box

Loosen the other two nuts on the control box

Remove the three fixing screws on the service panel

Remove the nine machine screws on the ceiling panel

Remove the connector of the solenoid valve in trouble

The coils on the solenoid valves SVA, SVB, SVM1,SVM1b, SVM2, and SVM2b can be serviced through the inspection door.

SVC is accessible for replacement by removing the four mounting screws on the rear panel and removing the panel

SVM1 is present only on the G1, GA1, and HA1 types, SVM2 on the GA1 and HA1 types, and SVM1b and SVM2b on the HA1 type.

Sign off on the disassembling process