IVT 09LR-N User Manual

12LRN
3 – 5
[3] THERMIST OR TEMPERATURE CHARACTERIS TICS
1. Indoor unit thermistor temperature characteristics
2. Outdoor 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 (CN8 3 - 4 )
Heat exchange
thermistor
TH2 (CN8 1 - 2 )
Tester
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
TH2
1
2
Tester
3
4
+
-
TH2 TH5
500K
400K
300K
200K
100K
0
-20 0 20 60 80 100 120
Tester
110
Connector
CN8
Resistance at 25
52.76 k
5.8K
40K
30K
20K
0
10K
-20 0 20 6040
3.06K
4.17K
1.72K
2.28K
+
-
Tester
(In case of TH2 heat exchanger thermistor)
110
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.

IVT 09LR-N Specifications

General

Brand	IVT
Model	09LR-N
Category	Heat Pump
Language	English