Service Manual

39
3. Indoor power P.C. board
Room temperature thermistor (RT11)
Indoor coil thermistor (RT12, RT13)
Temperature (°F)
Resistance (kΩ)
32
50 68 86 104 122 140
MSZ-GL18NA MSY-GL18NA
12V
GND
5V
Fuse (F11)
T3.15AL250V
Varistor (NR11)
Connector to indoor electronic
control P.C. board (CN20A)
5 VDC
12 VDC
GND
Connector to Indoor fan
motor (CN211)
Resistor (R111)
Connector to
Terminal block
(CN201)
(+)3-6 VDC
15 VDC
(-) GND (High
voltage DC)
294/325 VDC
(+)0 or 15 VDC
Timer short
mode point
(Refer to 7-1.)
Room temperature thermistor RT11 (CN111)
Connector to
Indoor coil ther-
mistor RT12,
RT13 (CN112)
Vane motor
(CN151)
Connector to indoor power
P.C. board (CN10A)
5V DC
To disable
"Auto restart
function",cut the
Jumper wire to
JR77. (Refer to
7-3.)
Emergency
operation
switch (SW1)
GND
4. Indoor electronic control P.C. board
12V DC
OBH732C