Mitsubishi Electric CMB-WP1016V-GA1 Service Handbook page 192

[ VIII Troubleshooting ]
Replacement procedures for each service part
1. Solenoid valve coil (SV1)
Operation procedures
(1) Remove the four fixing screws from the
service panel (right) and then remove
the service panel (right).
(2) Remove the two fixing screws from the
service panel (top right) and then re-
move the service panel (top right).
(3) Disconnect the corresponding solenoid
valve coil connector from the control
board.
(4) Remove the control box and then re-
move the solenoid valve coil wires se-
cured by clamps.
(5) Remove one solenoid valve coil fixing
screw from the top (indicated by direc-
tion of the arrow in the figure) and then
remove the solenoid valve coil.
(6) Remove the one fixing screw and then
remove the solenoid valve fixing plate.
(7) Install the new solenoid valve coil in the
position indicated in the figure and then
connect the connector to the control
board.
2. 4-way valve coils (21S4Ma, 21S4Mb)
Operation procedures
(1) Remove the four fixing screws from the
service panel (right) and then remove
the service panel (right).
(2) Disconnect the corresponding solenoid
valve coil connector from the control
board.
(3) Remove the two 4-way valve coil fixing
screws from the front (indicated by di-
rection of the arrow in the figure) and
then remove two 4-way valve coils.
(4) Remove the control box and then re-
move the 4-way valve coil wires secured
by clamps. They are also secured to the
solenoid valve coil wires with cable ties
so remove the cable ties.
(5) Install the new 4-way valve coils in the
positions indicated in the figure and then
connect the connectors to the control
board.
* Take care not to mix up the 4-way
valve coils on the left and right when
installing them.
HWE1410A
Illustrations
Service panel (right)
Solenoid valve fixing plate
Illustrations
- 183 -
Service panel
(top right)
Solenoid valve coil
Solenoid valve
coil (SV1)
4-way valve coil
(21S4Mb)
4-way valve coil
(21S4Ma)
Operation
location
In ceiling
space
Operation
location
In ceiling
space
GB