3-5
12PHR-N
[3] THERMISTOR TEMPERATURE CHARACTERISTICS
1. Indoor unit thermistor temperature characteristics
100
80
60
40
20
0
-10
0
10
20
30
40
Resistance
Thermistor
Room temperature
Heat exchange
Color
Yellow
Orange
Room temperature
thermistor TH1 (CN10 1 - 3 )
Heat exchange
thermistor TH2 (CN11 1 - 2 )
Tester
CN10
1
3
Signal
TH1
TH2
Figure 1 Temperature properties of indoor thermistors
k
To measure the resistance, first remove
the soldering as shown at right.
Room temperature
thermistor TH1 (Yellow)
25ºC resistance 10 k
Heat exchange thermistor
TH2 (Orange),
25ºC resistance 4.431 k
TH1
Tester
CN11
1
2
TH2
2. Outdoor unit thermistor temperature characteristics
+
-
TH2
TH5
500K
400K
300K
200K
100K
0
-20
0
20
60
80
100
120
Tester
1
10
Connector
CN8
Resistance at 25
52.76 k
5.8K
40K
30K
20K
0
10K
-20
0
20
60
40
3.06K
4.17K
1.72K
2.28K
+
-
Tester
(In case of TH2 heat exchanger thermistor)
1
10
Connector
CN8
Thermistor
Compressor thermistor
Heat exchanger thermistor
Outdoor air temperature thermistor
Suction thermistor
2-way valve thermistor
No.
TH1
TH2
TH3
TH4
TH5
Connector
No. (1) - No. (2)
No. (3) - No. (4)
No. (5) - No. (6)
No. (7) - No. (8)
No. (9) - No. (10)
Color
Red
Orange
Green
Black
Yellow
TH1 Compressor thermistor
TH2 Heat exchanger thermistor
TH3 Outdoor air temperature thermistor
TH4 Suction thermistor
TH5 2-way valve thermistor
Resistance
(K )
Resistance
(K )
Temperature(
)
Temperature(
)
Resistance at 0
14.57 k
Resistance at 25
4.431 k
Before measuring resistance,
disconnect connectors from PWB.
12PHR-N_S530612PHRN.indd 5
2013/8/7 15:42:15
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