Check; Thermistor Resistance Check - Daikin FLKS25BAVMB Service Manual

Check

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.
102
The data is for reference purpose only.
Thermistor temperature (°C)
–20
–15
–10
–5
0
5
10
15
20
25
30
35
40
45
50
(kΩ)
150
100
50
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.
Resistance (kΩ)
197.8
148.2
112.1
85.60
65.93
51.14
39.99
31.52
25.02
20.00
16.10
13.04
10.62
8.707
7.176
(R25°C = 20 kΩ, B = 3950 K)
–15 0 15 30
Multimeter
Resistance range
45
(˚C)
(R11905)
Room temperature
thermistor
Multimeter
(R21542)
Service Diagnosis
SiBE05-722EE
(R19559)