Check
SiUS041501E
91
Service Diagnosis
5. Check
5.1
Thermistor Resistance Check
Check No.01
Disconnect the connectors of the thermistors from the PCB, and measure the resistance of each
thermistor using multimeter.
When the room temperature thermistor is soldered on a PCB, remove the PCB from the control
PCB to measure the resistance.
When the connector of indoor heat exchanger thermistor is soldered on a PCB, remove the
thermistor and measure the resistance.
Thermistor temperature
Resistance (k
Ω
)
°C
°F
Room temperature
thermistor
Other thermistors
–20
–4
73.4 197.8
–15
5
57.0 148.2
–10
14
44.7 112.1
–5
23
35.3 85.60
0
32
28.2 65.93
5
41
22.6 51.14
10
50
18.3 39.99
15
59
14.8 31.52
20
68
12.1 25.02
25
77
10.0 20.00
30
86
8.2 16.10
35
95
6.9 13.04
40
104
5.8 10.62
45
113
4.9 8.707
50
122
4.1 7.176
(R25°C (77°F) = 10 k
Ω
,
B = 3435 K)
(R25°C (77°F) = 20 k
Ω
,
B = 3950 K)
Room temperature thermistor
(˚C)
(˚F)
50
25
0
–15
5
32
59
86
113
0
15
30
45
(k
Ω
)
(R21673)
Other thermistors
(˚C)
(k
Ω
)
–15
0
15
30
45
150
100
50
(˚F)
5
32
59
86
113
Multimeter
Resistance range
(R19751)
Multimeter
(R20505)
Room temperature
thermistor
Содержание FTKN09NMVJU
Страница 12: ...SiUS041501E 1 List of Functions Part 1 List of Functions 1 Functions 2...
Страница 17: ...SiUS041501E Specifications 6 Part 2 Specifications 1 Specifications 7 1 1 Cooling Only 7 1 2 Heat Pump 11...
Страница 59: ...SiUS041501E Remote Controller 48 Part 5 Remote Controller 1 Cooling Only 49 2 Heat Pump 51...
Страница 65: ...SiUS041501E Service Diagnosis 54 5 13 Power Module Check 100...
Страница 132: ...Revision History Month Year Version Revised contents 03 2015 SiUS041501E First edition...