Toshiba MMY-MUP0801HT8P-TR Service Manual page 294

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 terminal (
board.
(Remove the connectors by pulling the connector body. Do not pull the wire.)
(3) Remove six screws (
(These screws are to be re-used after procedure.)
(4) Remove the P.C. board from the four spacers (
Compressor P.C. board
(43T6W892, 43T6W893)
Space r
REACTOR lead wire
(CN04)
Screw
Screw
Screw
Screw
Screw
REACTOR lead wire
(CN05)
Screw
Pinch this part by
round-nose pliers for
removing the P.C. board
Spacer
(5) Set the SW800 setting of the service P.C. board to match the switch setting from the original P.C. board.
(6) Exchange spacers (
(7) Apply the Silicone Thermal Grease to the semiconductors (DB01, IC201) on the service P.C. board, and
align the positions of the heat sink holes to mount the Compressor P.C. board on the outdoor control unit.
And fix the Compressor P.C. board to the outdoor control unit by the spacers (
: 4pcs, : 2pcs).
WHITE lead wire(CN02)
BLACK lead wire(CN03)
SW800
Spacer
) and attach collar ( ) and bush (
P.C. board
Uniformly apply the Silicone Thermal Grease to the heat dissipating surfaces of the IPM
(IC201) and rectifier (DB01).
Note: Do this work carefully. Please do not soil or scratch the area which attaches the
semiconductor of a heat sink.
Silicone Thermal Grease use one of the following
• Momentive Performance Materials ''TIG1000''
• Dow Corning Toray ''SC102''
• Mizutani Electric Ind ''HSC1000''
• Shin-Etsu Chemical ''G-746'' or ''G-747''
: 6pcs) which were connected to the Compressor P.C.
) by round-nose pliers.
43T6W892
43T6W893
BLACK lead wire(CN03)
WHITE lead wire(CN02)
RED lead wire(CN01)
) to the service P.C. board (
Bush
Collar
- 294 -
Spacer
RED lead wire(CN01)
white letter
white letter
Spacer
).
).
50
75