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13-1-4(1). Compressor P.C. Board (MCC-1729) Replacement Procedure
Target model 43TN9880: MMY-MUP0721FT6*/0961FT6*/1201FT6*/1921FT6*/072H1FT6*
43TN9881: MMY-MUP1441FT6*/1681FT6*/096H1FT6*/120H1FT6*
This board is commonly installed in different models. Set the DIP switch (SW800) settings of the service board to
match as before replacement.
Included items:
① MCC-1729 : 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 connector and screw terminals(⑤：8pcs) which were connected to the Compressor P.C. board.
(Remove the connectors by pulling the connector body. Do not pull the wire.)
(3) Remove 6 screws(⑥：4pcs, ⑦：2pcs).
(These screws are to be re-used after procedure.)
(4) Remove the P.C. board from the 4 spacers (②) by round-nose pliers.
Compressor P.C. board
(43TN9880)
(43TN9881)
② Spacer
⑤ REACTOR lead wire
(CN04)
③ Bush
④ Collar
⑦ Screw
⑥ Screw
⑥ Screw
⑥ Screw
⑥ Screw
⑤ REACTOR lead wire
(CN05)
③ Bush
④ Collar
⑦ Screw
Pinch this part by
round-nose pliers for
removing the P.C. board
② Spacer
Set the DIP switch (SW800) settings of the service board to match as before replacement.
(5)
(6) Exchange spacers (②) and attach collars(④) and bushes(③) to the service P.C. board(①).
② Spacer : 4pcs
③ Bush : 2pcs
⑤ WHITE lead wire(CN02)
⑤ BLACK lead wire(CN03)
SW800
② Spacer
④ Collar : 2pcs
⑤ BLACK lead wire(CN03)
⑤ WHITE lead wire(CN02)
⑤ RED lead wire(CN01)
- 339 -
② Spacer
⑤ RED lead wire(CN01)
43TN9881
43TN9880
② Spacer
white letter
75
white letter
50
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