Mitsubishi Electric MSZ-LN18VG2W-SC1 Service Manual page 53

10-7. TEST POINT DIAGRAM AND VOLTAGE
Indoor power P.C. board, Indoor electronic control P.C. board, Display and receiver P.C. board, Switch
buzzer P.C. board
MSZ-LN18VGW/V/B/R-
MSZ-LN25VGW/V/B/R-
MSZ-LN35VGW/V/B/R-
MSZ-LN50VGW/V/B/R-
MSZ-LN60VGW/V/B/R-
Indoor power P.C. board
GND
Connector to indoor
electronic control
P.C. board (CN202)
Indoor electronic control P.C. board
Air purifying
device (CN1T1)
Indoor coil thermistor
RT12, RT13 (CN112)
Switch buzzer P.C. board
Emergency operation switch
(E.O.SW) (SW1)
i-see SENSOR motor (MT)
pin
i-see SENSOR
pin
pin
Display and receiver P.C. board
OBH766G
MSZ-LN18VG2W/V/B/R-
E1
, MSZ-LN25VG2W/V/B/R-
E1 ER1
, MSZ-LN35VG2W/V/B/R-
E1 ER1
, MSZ-LN50VG2W/V/B/R-
E1 ER1
, MSZ-LN60VG2W/V/B/R-
E1 ER1
Varistor (NR11)
Fuse (F11)
5 V DC
12 V DC
Interlock
switch
(CN2T1) 12 V DC
pin
Vane motor (MV1)
(horizontal)
Vane motor (MV2)
(vertical)
, , , ,
E1 ER1 EN1 ET1 E2
, , , , ,
E1 ER1 ET1 E2 ER2 ET2
, , , , ,
E1 ER1 ET1 E2 ER2 ET2
, , , , ,
E1 ER1 ET1 E2 ER2 ET2
, , , , ,
E1 ER1 ET1 E2 ER2 ET2
Connector Terminal
Block (CN201)
Timer short mode point
TB (Refer to 8-1.)
GND
5 V DC
Room temperature
thermistor RT11 (CN111)
53
Indoor fan motor
(CN211)
(+)0 or 15 V DC
(+)3-6 V DC
15 V DC
(–) GND (high-
voltage DC)
325 V DC
Resistor (R111)
(MSZ-LN18/25/35/60)
Reactor (L112)
(MSZ-LN50)
Room temperature thermistor (RT11)
Indoor coil thermistor (RT12, RT13)
Temperature (°C)
Connector to indoor
power P.C. board
(CN102)
Cut the jumper wire JR24
when the room tempera-
ture does not reach the set
temperature during heating
operation.
(Refer to 8-6.)
To disable "Auto restart
function", cut the Jumper
wire to JR77. (Refer to 8-4.)
pin
pin