8-15 Main-Hbc Maintenance Instructions; Solenoid Valve Coil (Sv1) Replacement Procedure (Hbc); 4-Way Valve Coils (21S4Ma, 21S4Mb) Replacement Procedure (Hbc) - Mitsubishi Electric PURY-M200YNW-A1 Service Handbook

[8-15 Main-HBC Maintenance Instructions ]

8-15 Main-HBC Maintenance Instructions

8-15-1

Solenoid Valve Coil (SV1) Replacement Procedure (HBC)

Operation procedures
1) Remove the eight fixing screws from the
service panel (front lower).
2) Disconnect the corresponding solenoid
valve coil connector from the control
board.
3) Remove the solenoid valve coil wire se-
cured by clamps.
Remove the cable ties holding other
wires.
4) Remove the one solenoid valve coil fix-
ing screw from the front and then re-
move the solenoid valve coil.
5) Install the new solenoid valve coil in the
position indicated in the figure and then
connect the connector to the control
board.
6) Hold the wires in place with the clamps
and the cable ties removed in step 3)
above.
8-15-2

4-Way Valve Coils (21S4Ma, 21S4Mb) Replacement Procedure (HBC)

Operation procedures
1) Remove the eight fixing screws from the
service panel (front lower).
2) Disconnect the corresponding 4-way
valve coil connector from the control
board.
3) Remove the two 4-way valve coil wires
secured by clamps.
Remove the cable ties holding other
wires.
4) Remove the two 4-way valve coil fixing
screws from the front and then remove
two 4-way valve coils.
5) Install the new 4-way valve coils in the
position indicated in the figure and then
connect the connector to the control
board.
6) Hold the wires in place with the clamps
and the cable ties removed in step 3)
above.
*Take care not to mix up the 4-way valve
coils on the left and right when install-
ing them.
138
- chapter 8
Illustrations
Service panel
(front lower)
Illustrations
Solenoid valve coil (SV1)
Solenoid valve coil
4-way valve coil (21S4a)
4-way valve coil (21S4b)
Operation
location
Installation
location
Operation
location
Installation
location
BS_08_L