Toshiba RAS-4M27S3AV-E Service Manual page 109

∗ RAS-4M27S3AV-A only
No. Part name
Demand P.C.
21
board
NOTE)
1. Detachment
1) Stop operation of the air conditioner, and turn off the
2) Remove the front panel.
3) Remove the power supply cable and the indoor/
4) Remove the fixing screws of Demand P.C. board
5) Remove the earth screws.
6) Remove the power supply wiring and relay
7) Remove the Demand P.C. board from the fixture.
8) Exchange the Demand P.C. board with a new one.
NOTE)
Procedure
CUATION
Never forget to put on the gloves at working time;
otherwise an injury will be caused by the parts etc.
When working, be sure to use the insulate tools and
put on the insulated gloves.
WARNING
Never disassemble the inverter until 5 minutes after
the power supply was turned off because there is a
fear that an electric shock may occur.
switch of the breaker.
(Hexagonal screw Ø4 × 10, 5 pcs.)
• After taking off screws, the front panel is pulled
downward .
The front panel is pulled forward and removed
outdoor/DRED connecting wire from the cord clamp
and the terminal.
assembly, and draw out the Demand P.C. board.
(Truss head B tight Ø4 × 6, 2pcs.)
(Truss head B tight Ø4 × 6, 1pc.)
connector connected to the Demand P.C. board.
CN100 : UART (2P, White)
CN101 : UART (2P, Yellow)
CN102 : UART (2P, White)
CN105 : UART (2P, White)
COM terminal: Red lead wire
DRM1 terminal: White lead wire
DRM2 terminal: Black lead wire
DRM3 terminal: Blue lead wire
* Unlock the lock of the housing unit and then
remove the connectors.
Using the bundling band being on the market, be
sure to bind the position which was bound.
Front panel
.
UART
(CN105)
UART
(CN100)
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FILE NO. SVM-15073
Remarks
Downward
Downward
1
Forward Forward
2
Transformer for
Demand P.C. board
Demand P.C. board
assembly
Fixing screws for Demand
P.C. board assembly
COM, DRM1-DRM3
terminal
UART
(CN102)
UART
(CN101)