Mitsubishi Electric MSZ-BT20VG-E3 Service Manual page 42

OPERATING PROCEDURE
3. Removing the indoor electrical box
(1) Remove the panel (Refer to section 1.) and the corner
box right.
(2) Remove the screw of the V.A. clamp.
Remove the V.A. clamp and the indoor/outdoor connect-
ing wire.
(3) Remove the earth wire connected to the indoor heat
exchanger from the electrical box.
(4) Remove the screw of the electrical cover and remove
the electrical cover.
(5) Disconnect following connectors:
<Indoor electronic control P.C. board>
CN151 (Vane motor)
CN105 (Wi-Fi interface) (
CN110 (Wi-Fi interface) (
<Indoor power P.C. board>
CN211 (Indoor fan motor)
(6) Remove the lead wire of the Wi-Fi interface, and
remove the Wi-Fi interface (Refer to section 2.).
(7) Unhook the upper and lower catch of the electrical box,
and pull out the electrical box.
NOTE:
To attach the electrical box, pass the wires connecting the
indoor power monitor receiver SW P.C. board and the
indoor electronic control P.C. board through A. Pass the
lead wires of the fan motor through B as shown in the
Photo 3-1.
(
Photo 3-2 , ,
E1 ET1 E2
(
Photo 3-2 , ,
E3 ER2 ET3
OBH849G
model)
, , , ,
E1 ET1 E2 ET2 ER1
model)
, ,
E3 ER2 ET3
model)
, ,
ET2 ER1
Indoor fan motor
connector (CN211)
Vane motor
connector (CN151)
Wi-Fi interface
connector (CN105)
Room temperature
thermistor connector
(CN111)
Insulations *1
model)
Indoor fan motor
connector (CN211)
Vane motor
connector (CN151)
Wi-Fi interface
connector (CN110)
Room temperature
thermistor connector
(CN111)
Insulations *1
PHOTOS/FIGURES
Photo 3-1
( model)
, , , ,
E1 ET1 E2 ET2 ER1
Screw of
the terminal block
Wi-Fi interface
Earth wire
connected to
the electrical box
Photo 3-1
( model)
, ,
E3 ER2 ET3
Screw of
the terminal block
Wi-Fi interface
Earth wire
connected to
the electrical box
42
Upper catch of
Electrical box
the electrical box
Indoor
electronic
control
P.C. board
Lower catch of
A B
the electrical box
Upper catch of
Electrical box
the electrical box
Indoor
electronic
control
P.C. board
Lower catch of
A B
the electrical box