Check For Ctxg, Ctxs, Ftxs, Cdxs, Fdxs, Fvxs Series - Daikin RMXS-L Series Service Manual

SiUS181631EA
4.6

Check for CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series

4.6.1 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.
The data is for reference purpose only.
Troubleshooting
Thermistor temperature
°C °F
–20 –4
–15 5
–10 14
–5 23
0 32
5 41
10 50
15 59
20 68
25 77
30 86
35 95
40 104
45 113
50 122
(R25°C (77°F) = 20 kΩ, B = 3950 K)
(kΩ)
150
100
Room temperature
thermistor
Multimeter
(R20505)
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.
Troubleshooting for CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series
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
50
–15 0 15 30
5 32 59 86
Other thermistors
(˚C)
45
113 (˚F)
(R14467)
Multimeter
Resistance range
(R23371)
205