29
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)
approximately 4 Ω
Indoor fan motor
(CN211)
(+)0-6 V
(+)3-6 V DC
15 V DC
(–) GND (high-
voltage DC)
294/325 V DC
Timer short mode point JPG JPS
(Refer to 7-1.)
Room temperature
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 (kΩ)
32 50 68 86 104 122 140
MSZ-WR09NA -
U1
MSZ-WR12NA -
U1
OBH818C
