26
9-7. Test point diagram and voltage
1. Indoor power P.C. board, Indoor terminal P.C. board
Indoor terminal P.C. board
Indoor power P.C. board
Please replace the fuse after removing the indoor terminal P.C.
board from the electrical box.
Fuse (F11)( )
Varistor (NR11)
Terminal
block
Connector to indoor electronic
control P.C. board (CN20A)
5 V DC
12 V DC
GND
Resistor (R111)
Indoor fan motor
(CN211)
(+)0-6 V
(+)3-6 V DC
15 V DC
(–) GND (high-
voltage DC)
162 V DC
Timer short mode point JPG JPS
(Refer to 7-1.)
Room tempera-
ture thermistor
RT11 (CN111)
Indoor coil ther-
mistor RT12,
RT13 (CN112)
Vane motor
(CN151)
Connector to
Indoor power P.C.
board (CN10A)
12 V DC
5 V DC
To disable "Auto restart function",
solder the Jumper wire to JR07.
(Refer to 7-3.)
Emergency operation
switch (SW1)
2. Indoor electronic control P.C. board
GND
Room temperature thermistor (RT11)
Indoor coil thermistor (RT12, RT13)
Temperature (°F)
Resistance (k
Ω
)
32 50 68 86 104 122 140
MSZ-JP09WA MSZ-JP12WA
OBH820
