Temperature Properties Of Outdoor Thermistors; Temperature Properties Of Heatsink Thermistor - Sharp AE-XM24HR Service Manual

Figure 2 Temperature properties of outdoor thermistors
1
Connector
CN8A
TH2 : Heat exchanger pipe thermistor (CN8A 3 - 4 )
TH3 : Outdoor temp. thermistor (CN8A 5 - 6 )
TH4 : Suction thermistor (CN8A 7 - 8 )
TH6 : Thermistor unit A (CN8C 1 - 2 )
TH7 : Thermistor unit B (CN8C 3 - 4 )
TH8 : Thermistor unit C (CN8C 5 - 6 )
TH9 : Thermistor unit D (CN8C 7 - 8 )
TH1 compressor thermistor
(CN8A 1 - 2 )
500k
400k
25
resistance
300k
45 k
200k
100k
0
-20 0 20
Temperature ( )
To measure the resistance, first remove the connector from the board.
Thermistor
Compressor thermistor
Heat exchanger pipe thermistor
Outdoor temp. thermistor
Suction thermistor
Thermistor unit A (suction)
Thermistor unit B (suction)
Thermistor unit C (suction)
Thermistor unit D (suction)
Figure 3 Temperature properties of heatsink thermistor
500
400
300
200
100
0
-20
8
5.78k 3.06k
4.17k 2.28k
1.72k
60 80 100 120
No. Connector
TH1
CN8A
CN8A
TH2
CN8A
TH3
CN8A
TH4
CN8C
TH6
CN8C
TH7
CN8C
TH8
CN8C
TH9
Thermistor Color
Signal
Heatsink Black
CN8B
To measure the resistance, first remove
the connector as shown at right.
Heatsink thermistor
TH5 (black)
25
resistance 50k
6.14k
12.3k
0 20 40 60 80
Temperature ( )
3 – 8
1 8
Connector
CN8C
40k
resistance
0
14.5 k
30k
25 resistance
4.431 k
20k
10k
0
-20 0 20
Temperature ( )
Color Connector pin
No. 1 to 2
Red
Orange No. 3 to 4
Green
No. 5 to 6
Black
No. 7 to 8
Blue
No. 1 to 2
White
No. 3 to 4
No. 5 to 6
Brown
No. 7 to 8
Yellow
1
3
Tester
3.25k
100
TH2 - TH4
TH6 - TH9
40 60