Mitsubishi Air Conditioner PURY-P400YLM-A

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.

Upload a photo of the removed service panel

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.

Was the unit dismounted from the ceiling?

Sign off on the disassembling process

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

Is there no refrigerant in the outdoor unit?

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

Was the Solenoid valve block ASSY removed successfully?

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

1) For TH11, TH12, and TH15, refer to 1. 1), 2).

2) For TH16, refer to 1. 1), 2), 3). (GA1 type only).

(2) Remove the lead wire of the piping sensor from the control board.

(3) Pull out the temperature sensor from the temperature sensor housing, and replace the temperature sensor with the new one.

(4) Connect the lead wire of the temperature sensor securely on the control board.;

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