Mitsubishi Electric MSZ-FS12NA-U1 Service Manual page 32

9-7. TEST POINT DIAGRAM AND VOLTAGE
Indoor power P.C. board, Indoor electronic control P.C. board, Receiver board, Display board, Switch board
MSZ-FS06NA MSZ-FS09NA MSZ-FS12NA MSZ-FS15NA MSZ-FS18NA
Indoor power P.C. board
Connector
Terminal Block
(CN201)
GND
Connector to indoor
electronic control
P.C. board (CN202)
Indoor electronic control P.C. board
Room temperature
thermistor RT11 (CN111)
Connector cable (CN24)
Display board
CN110
~
Receiver board
(CN301)
~
, ,
, pin
i-see SENSOR
MOTOR MT
~
i-see sensor
CN151
Vane motor MV1 ~
26
(horizontal)
Vane motor MV2 ~
(vertical)
Emergency operation switch (E.O.SW) (SW1)
Switch board
OBH872
12 VDC 5 VDC
pin
pin
,
pin
pin
Indoor coil thermistor
pin
RT12, RT13 (CN112)
Fuse (F11) Varistor (NR11)
5 VDC
12 VDC
Interface
(CN105)
Timer short
mode point
GND
JPG JPS
(Refer to 7-1.)
32
Indoor fan motor
(CN211)
(+)0 or 15 VDC
(+)3-6 VDC
15 VDC
(–) GND (high-
voltage DC)
294/325 VDC
Resistor (R111)
Room temperature thermistor (RT11)
Indoor coil thermistor (RT12, RT13)
32 50 68 86 104 122 140
Temperature (°F)
Connector to indoor
power P.C. board
(CN102)
To disable "Auto restart
function" cut the Jumper
wire to JR77. (Refer to 7-4.)