Sub-Hbc Maintenance Instructions (Cmb-Wm108,1016V-Bb) - Mitsubishi Electric CMB-WM108V-AA Service Handbook

[ VIII Troubleshooting ]

[10] Sub-HBC Maintenance Instructions (CMB-WM108,1016V-BB)

1. Valve Block Assembly Replacement Procedure
Operation procedures
1) Drain water from the system, and move
the unit out of the ceiling space.
2) Unscrew all screws from the service
panels (top, front, back, left), and re-
move the service panels.
Number of screws on the panels
Service panel (right): 4
Service panel (left): 6
Service panel (top left): 2
Service panel (top right): 2
Service panel (front upper): 6
Service panel (front lower): 4
Service panel (front middle top): 5
Service panel (front middle bottom): 5
Service panel (side-left): 4
3) Unscrew the control box fixing screws
(x4), and remove the control box.
Disconnect all wire connectors from the
control box.
4) Unscrew the float switch mounting
screws (x2), and remove the float
switch.
5) Unscrew the screws (x14) on the right
and left panels, lift the valve block by
holding the hanging brackets, and re-
move the service panel (bottom) and the
drain pan.
HWE1708A
Illustrations
Service panel (top left)
Service panel (left)
Control box
Service panel (front middle top)
Service panel (side-left)
Service panel (bottom)
- 220 -
Service panel (top right)
Service panel (right)
Service panel (front upper)
Service panel (front lower)
Service panel (front middle bottom)
Float switch
Drain pan
Operation
location
Under the
ceiling
GB