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13-1-7(1). Noise Filter P.C. Board (MCC-1749) Replacement Procedure
Target model
43TN9876: MMY-MUP0721HT9*/0961HT9*/072H1HT9*
Included items:
① MCC-1749 : 1pcs
Replacement Steps:
(1) Turn off the power supply of the outdoor unit and wait at
least 5 minutes for the capacitor to discharge.
(2) Remove all of the connectors attached to the Noise
Filter P.C. board. (Remove the connectors by pulling the
connector body. Do not pull the wire.)
(3) Remove screws (⑦：12pcs (M6) ) and Line-Filters
which were connected to the Noise Filter P.C. board.
(4) Remove 8 screws(⑤：6pcs (M3), ⑥：2pcs (M4) ).
(5) Keep the removed screws as they will be reused.
(6) Remove the P.C. board from 6 spacers (②:4pcs,
③:2pcs).
(7) If spacers (②, ③) are damaged, replace it and
attach bushes(④) to the service P.C. board(①).
(8) Screw the Noise Filter P.C. board by 8 screws
(⑤, ⑥) that were removed in step (4).
(9) Re-connect the connectors and screw terminals(⑦),
Line-Filters. Be sure that all the connectors and the
screw terminals are connected correctly and
securely inserted.
(10) If the components on the P.C. board were bent
during board replacement, adjust it manually
ensuring that it is not short or contact other
parts.
(11) Install the cover, then turn on the supply.
Check the operation.
② Spacer : 4pcs
③ Spacer : 2pcs
The torque of the screws
⑤
⑥
⑦
④ Bush : 6pcs
Noise Filter P.C. board
⑦ BLACK lead wire
⑦ RED lead wire
⑦ BLACK lead wire
② Spacer
⑥ Screw
(M4)
④ Bush
⑤ Screw (M3)
⑥ Screw
(M4)
② Spacer
④ Bush
⑤ Screw (M3)
Screw
M3 x 0.7" (18mm)
Screw
M4 x 0.3" (8mm)
Screw terminal
M6 x 0.47" (12mm)
- 296 -
(43TN9876)
(CN28, M6)
(CN26, M6)
④ Bush
(CN27, M6)
⑤ Screw (M3)
⑦ RED lead wire
⑦ WHITE lead wire
⑦ BLACK lead wire
③ Spacer
⑦ Line Filter(CN11, M6)
⑦ Line Filter(CN12, M6)
⑦ Line Filter(CN13, M6)
③ Spacer
⑦ RED lead wire
⑦ WHITE lead wire
⑦ BLACK lead wire
② Spacer
0.44 ft•lbs (0.6 N•m )
0.89 ft•lbs (1.2 N•m )
2.21 ft•lbs (3.0 N•m)
② Spacer
(CN21, M6)
(CN22, M6)
(CN23, M6)
(CN01, M6)
(CN02, M6)
(CN03, M6)
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