Mitsubishi Electric PURY-M200YNW-A1 Service Handbook page 407

[8-15 Main-HBC Maintenance Instructions ]
8-15-5 Valve Block Replacement Procedure (HBC)
Operation procedures
1) Remove both front service panels (up-
per and lower).
2) Drain water out of the unit through the
pump.
3) Disconnect all indoor unit pipes at the
connections to on-site pipes.
4) Disconnect all motor connectors.
5) Unclip the six clips above the valve
block (A) and the four clips on each side
(B).
Clip
6) Place your hand behind the block, and
unclip the clips holding the indoor unit
pipes on the back (C).
(After unclipping the first clip, move the
unclipped branch pipe at the upper part
of the block to the side, and unclip other
clips by placing your hand from above
the block.)
7) Unscrew the fixing screws on both sides
of the block (two screws each on the left
and the right).
(If it is difficult to reach the screws, move
the pipes to the side to create a space.)
8) Pull the block forward and out.
9) Install the new block on the unit in the re-
verse order as it was removed.
140
- chapter 8
Illustrations
Six clips above the valve block (A)
Four clips on the side (B)
Motor connectors
Front
Screws (x2)
Pull the block forward and out.
Four clips on the side (B)
Back
Six clips on the back (C)
Screws (x2)
Operation
location
Installation
location
BS_08_L