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14. FS UNIT PARTS REPLACEMENT METHODS
14-1. Flow Selector unit Multi-port type
No.
Part
1
Electrical control
box cover
2
P.C.board
(MCC-1770)
Work procedure
⚠︎
WARNING
――――――――――――――――
・Wear a pair of gloves.
Otherwise, you will risk an injury involving a
replacement part or some other object.
・Stop the power supply of the air conditioner
and turn off switch of the power supply
breaker.
――――――――――――――――
1. Detachment
1) Remove the screws of under side.
(M4 x 0.3" (8 mm), 2 pcs)
2) Loosen fixing screws of upper side.
(M4 x 0.3" (8 mm), 2 pcs)
3) Pull the cover downward and then remove
the cover.
2 Attachment
1) Hook the electrical control box cover on the
screw on the upper side. (2 places)
2) Slide up the cover and fit it in.
Work carefully so as not to pinch the wires
inside the box.
3) Fix the underside with screws.
(M4 x 0.3" (8 mm), 2 pcs)
4) Tighten the screws of upper side.
(M4 x 0.3" (8 mm), 2 pcs)
1. Detachment
1) Perform work of procedure 1-1 Detach-
ment. (Electrical control box cover)
2) Remove connectors which are connected
from the control P.C.board to the other
parts.
Unit 1-4 (*FU4PUL) / (*FU8PUL) / (*FU12PUL)
CN04: Earth wire (Faston tab)
CN67: Power supply wires (Black)
CN200: Communication wire (Terminal block)
CN309: Power supply wires (Yellow)
CN400: Communication wire (Terminal block)
CN581: Communication wire (Yellow)
CN602: PMV-S1 (Blue)
CN603: PMV-D1 (White)
CN702: PMV-S2 (Blue)
CN703: PMV-D2 (White)
CN802: PMV-S3 (Blue)
CN803: PMV-D3 (White)
CN902: PMV-S4 (Blue)
CN903: PMV-D4 (White)
- 349 -
Remarks
Screws
(upper side)
Screws
(under side)
(ex. RBM-Y0611FU4PUL )
Hook to the screw
Slide up
Cover
MCC-1770
MCC-1770
MCC-1770
Unit 1-4
Unit 9-12
Unit 5-8
(ex. RBM-Y0611FU12PUL )
Card edge spacer
MCC-1770
Unit 1-4
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Troubleshooting
