Mitsubishi Electric CMB-WM108V-AA Service Handbook page 226

[ VIII Troubleshooting ]
18. Pressure sensor (PS3)
Operation procedures
(1) Perform the work as described in (1) to
(8) of 5.
(2) Cut the cable ties securing the heat in-
sulation material indicated in the figure
and then remove the heat insulation ma-
terial.
(3) Debraze the brazed portion of the pres-
sure sensor indicated in the figure and
then replace the pressure sensor with a
service part. ( in the figure)
Protect the heat insulation material
around the pressure sensor so as not to
burn it with the flame of the torch.
19. Strainer in front of 4-way valve
Operation procedures
(1) Collect the refrigerant and water and
then carry out the unit from the ceiling
space.
(2) Remove the four fixing screws from the
service panel (right) and then remove
the service panel (right).
(3) Remove the two fixing screws from the
service panel (top right) and then re-
move the service panel (top right).
(4) Disconnect the 4-way valve coil connec-
tor from the control board.
(5) Remove the one 4-way valve coil fixing
screw from the front (indicated by direc-
tion of the arrow in the figure) and then
remove the 4-way valve coil so as not to
burn the wires with the brazing flame.
(6) Debraze the positions indicated in the
figure, remove the strainer inside the
pipe, and then replace it with a service
part.
HWE1708A
Illustrations
Heat insulation material
Illustrations
Service panel (right)
- 217 -
Service panel (top right)
4-way valve coil
(21S4Mb)
4-way valve coil
(21S4Ma)
Strainer
Operation
location
Below
ceiling
Operation
location
Below
ceiling
GB