Daikin FTX20K2V1B, Руководство по обслуживанию

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Check SiBE041525F
79 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 a 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.
The data is for reference purpose only.
Thermistor temperature (°C)
Resistance (k Ω )
Room temperature thermistor Other thermistors
–20 73.4 197.8
–15 57.0 148.2
–10 44.7 112.1
–5 35.3 85.60
0 28.2 65.93
5 22.6 51.14
10 18.3 39.99
15 14.8 31.52
20 12.1 25.02
25 10.0 20.00
30 8.2 16.10
35 6.9 13.04
40 5.8 10.62
45 4.9 8.707
50 4.1 7.176
(R25°C = 10 k
Ω
, B = 3435 K) (R25°C = 20 k
Ω
, B = 3950 K)
Room temperature thermistor
(˚C)
50
25
0
–15
0
15 30 45
(k
Ω
)
(R11952)
Other thermistors
(˚C)
(k
Ω
)
–15 0 15 30 45
150
100
50
Multimeter
Resistance range
(R19751)
Multimeter
(R20505)
Room temperature
thermistor