Interface P.c. Board (Mcc-1747) Replacement Procedure - Toshiba MMY-MUP0801HT8P-TR Service Manual

13-1-3. Interface P.C. Board (MCC-1747) Replacement Procedure

Subject part 43T6W890: ALL model
This Interface service P.C. board is commonly installed in different models. Please perform the change by a
model after exchange of a service board.
Included item:
MCC-1747 : 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 and wiring for a screw
terminal ( ) which were connected to the interface P.C.
board. (Remove the connectors by pulling the connector
body. Do not pull the wire.)
(3) Remove three screws (
(These screws are to be re-used after procedure.)
(4) Remove the P.C. board from the four spacers
( :4pcs, :2pcs)
(5) Set the DIP switch settings of the service board to match
the switch settings of the P.C. board being replaced.
Interface P. C. Board
43T6W890
DIP Switch
Spacer : 4pcs Spacer : 2pcs
Bush : 3pcs Short Connector : 1pcs
:2pcs, :1pcs).
(6) Using a new spacer (
attach the service board.
(7) Re-connect the connectors and resin cover, screws (
terminals (
terminals are connected correctly and securely inserted.
(8) The product with HP-SW2 should connect HP-SW2 to CN306.
The product without HP-SW2 should connect a short connector to
CN306.
Caution: Please do not use a short connector for a product with
HP-SW2.
The protection circuit does not operate.
(9) If a component on the P.C. board is bent during board replacement,
adjust it manually ensuring that it is not short-circuited or contact
other parts.
(10) Install the cover, then turn on the power supply.
- 292 -
Support : 1pcs
Resin Cover
Spacer
Screw
Screw
Spacer
Spacer
Screw
, ), a support (
). Be sure that all the connectors and the screw
The torque of the screws
Screw terminals
Screw
Screw
CN306 Red
Spacer
Spacer
Spacer
Screw terminal
), and a bush ( ),
, ), screw
M4 10 1.2N• m
M3 25 0.6N• m
M4 8 1.2N• m