31
Indoor electronic control P.C. board
Indoor power P.C. board
Fuse (F11)
Varistor (NR11)
Indoor fan motor
(CN211)
(+)0 or 15 VDC
(+)3-6 VDC
15 VDC
(–) GND (high-
voltage DC)
294/325 VDC
Connector
Terminal Block
(CN201)
Connector to indoor
electronic control
P.C. board (CN202)
Receiver board
(CN301)
Display board
Switch board
Resistor (R111)
GND
12 VDC
GND
Timer short
mode point
JPG JPS
(Refer to 7-1.)
To disable "Auto restart
function" cut the Jumper
wire to JR77. (Refer to 7-4.)
Emergency operation switch (E.O.SW) (SW1)
Connector to indoor
power P.C. board
(CN102)
Indoor coil thermistor
RT12, RT13 (CN112)
Indoor power P.C. board, Indoor electronic control P.C. board, Receiver board, Display board, Switch board
MSZ-FH09NA MSZ-FH12NA MSZ-FH15NA
9-7. TEST POINT DIAGRAM AND VOLTAGE
5 VDC
5 VDC
i-see SENSOR
MOTOR MT
i-see SENSOR
~ pin
~ pin
, , ,
, pin
~ pin
CN110
Vane motor MV1
(horizontal)
Vane motor MV2
(vertical)
CN151
~ pin
~ pin
26
12 VDC
Room temperature
thermistor RT11 (CN111)
Room temperature thermistor (RT11)
Indoor coil thermistor (RT12, RT13)
Temperature (°F)
Resistance (k
Ω
)
32 50 68 86 104 122 140
Connector cable (CN24)
Interface
(CN105)
OBH683B
