Read Sharp AE-XM18CR (serv.man11) Service Manual online
46
AY-XM7/9/12CR
AY-XPM7/9/12CR
AE-XM18/24CR
AY-XPM7/9/12CR
AE-XM18/24CR
100
80
60
40
20
0
-10
0
1
0
2
0
3
0
4
0
Resistance
Thermistor
Room temperature
Heat exchange
Pipe temperature
Color
Yellow
Orange
Black
Room temperature
thermistor TH1 (CN6 3 - 4 )
Heat exchange
thermistor TH2 (CN6 1 - 2 )
Pipe temperature
thermistor TH3 (CN6 5 - 6 )
Tester
CN6
1
6
Signal
TH1
TH2
TH3
Figure 1 Temperature properties of indoor thermistors
kΩ
500k
400k
300k
200k
100k
0
-20
0
2
0
6
0
8
0
100
120
3.06k
5.78k
2.28k
1.72k
40k
30k
20k
10k
0
-20
0
2
0
6
0
40
Figure 2 Temperature properties of outdoor thermistors
Connector
CN8B
1
6
TH1 compressor thermistor
(CN8A 1 - 2 )
TH2 - TH7
Temperature (
°C)
Temperature (
°C)
Thermistor
Color
No.
Connector
Compressor thermistor
Heat exchanger pipe thermistor
Connector pin
Outdoor temp. thermistor
TH1
TH2
TH3
CN8A
CN8A
Red
No. 1 to 2
No. 3 to 4
No. 5 to 6
No. 7 to 8
No. 1 to 2
No. 3 to 4
No. 5 to 6
Orange
Suction thermistor
TH4
CN8A
Black
Thermistor unit A (suction)
TH5
CN8B
Blue
Thermistor unit B (suction)
TH6
CN8B
White
Thermistor unit C (suction)
TH7
CN8B
Brown
CN8A
Green
Connector
CN8A
18
25
°C resistance
45 k
Ω
Resistance (
Ω)
Resistance (
Ω)
0°
C resistance
14.5 k
Ω
25
°C resistance
4.431 k
Ω
Cautions when attaching or removing the board
When oper
ating only the outdoor unit (cooling 55 Hz fix
ed mode)
T
o
mak
e
only the outdoor unit r
un in cooling mode
, and apply a v
oltage of 230
V A
C
to 1 and N on the ter
minal board and push the pump do
wn s
witch.
(SW51)
(A
v
oid oper
ating the outdoor unit alone f
or long per
iods of time
.)
To measure the resistance, first remove
the soldering as shown at right.
Room temperature
thermistor TH1 (Yellow)
25
°C resistance 10 k
Ω
Heat exchange thermistor
TH2 (Orange), TH3 (Black)
25
°C resistance 4.431 k
Ω
To measure the resistance, first remove the connector from the board.
4.17k
TH2 : Heat exchanger pipe thermistor (CN8A 3 - 4 )
TH3 : Outdoor temp. thermistor (CN8A 5 - 6 )
TH4 : Suction thermistor (CN8A 7 - 8 )
TH5 : Thermistor unit A (CN8B 1 - 2 )
TH6 : Thermistor unit B (CN8B 3 - 4 )
TH7 : Thermistor unit C (CN8B 5 - 6 )
