Daikin FTXB50BV1B, Service Manual

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6.0 Appendix A
:
6.1 Thermistor resistance checking procedures
Remove the connectors of thermistors at PCB and measure resistance of each thermistor using tester as
shown below.
Tester
Resistance range
Resistance value refer to Resistance table below.
ARXN/RXN50/60L,RX50CG
ARXN/RXN25/35L/M,
ARXN/RXN50/60M
Indoor Wall Mounted 10K Ω (Table 2) 10K Ω (Table 2)
Outdoor Outdoor split 10K Ω (Table 2) 20K Ω (Table 1)
Table 1: Resistance R25 = 20K ohm
Temperature (°C) Resistance value (k Ω )
-20 211.0
-15 150.0
-10 116.5
-5 88.0
0 67.2
5 51.9
10 40.0
15 31.8
20 25.0
25 20.0
30 16.0
35 13.0
40 10.6
45 8.7
50 7.2
Table 2: Resistance R25 = 10K ohm
t°C Rmin (k Ω ) Rnom (k Ω ) Rmax (k Ω ) t°C Rmin (k Ω ) Rnom (k Ω ) Rmax (k Ω )
-10 4.42E+01 4.53E+01 4.65E+01
-9 4.21E+01 4.32E+01 4.43E+01 41 5.47E+00 5.56E+00 5.64E+00
-8 4.02E+01 4.12E+01 4.22E+01 42 5.28E+00 5.37E+00 5.45E+00
-7 3.83E+01 3.92E+01 4.02E+01 43 5.10E+00 5.18E+00 5.27E+00
-6 3.66E+01 3.74E+01 3.83E+01 44 4.92E+00 5.01E+00 5.09E+00
-5 3.49E+01 3.57E+01 3.65E+01 45 4.75E+00 4.84E+00 4.92E+00
-4 3.33E+01 3.41E+01 3.49E+01 46 4.59E+00 4.67E+00 4.76E+00
-3 3.18E+01 3.26E+01 3.33E+01 47 44.4E+00 4.52E+00 4.60E+00
-2 3.04E+01 3.11E+01 3.18E+01 48 4.29E+00 4.37E+00 4.42E+00
-1 2.90E+01 2.97E+01 3.03E+01 49 4.15E+00 4.22E+00 4.30E+00
0 2.78E+01 2.84E+01 2.90E+01 50 4.01E+00 4.09E+00 4.16E+00
1 2.66E+01 2.71E+01 2.77E+01 51 3.88E+00 3.95E+00 4.03E+00
2 2.54E+01 2.59E+01 2.65E+01 52 3.75E+00 3.82E+00 3.90E+00
3 2.43E+01 2.48E+01 2.53E+01 53 3.63E+00 3.70E+00 3.77E+00
4 2.33E+01 2.37E+01 2.42E+01 54 3.51E+00 3.58E+00 3.65E+00
5 2.23E+01 2.27E+01 2.31E+01 55 3.40E+00 3.47E+00 3.54E+00
6 2.14E+01 2.18E+01 2.21E+01 56 3.29E+00 3.36E+00 3.43E+00
7 2.05E+01 2.08E+01 2.12E+01 57 3.18E+00 3.25E+00 3.32E+00
8 1.96E+01 2.00E+01 2.03E+01 58 3.08E+00 3.15E+00 3.22E+00
9 1.88E+01 1.91E+01 1.94E+01 59 2.98E+00 3.05E+00 3.12E+00
10 1.80E+01 1.83E+01 1.86E+01 60 2.89E+00 2.96E+00 3.01E+00
11 1.73E+01 1.76E+01 1.78E+01 61 2.80E+00 2.86E+00 2.93E+00
12 1.66E+01 1.69E+01 1.71E+01 62 2.71E+00 2.78E+00 2.84E+00
13 1.59E+01 1.62E+01 1.64E+01 63 2.63E+00 2.69E+00 2.75E+00
14 1.53E+01 1.55E+01 1.57E+01 64 2.55E+00 2.61E+00 2.67E+00
15 1.47E+01 1.49E+01 1.51E+01 65 2.47E+00 2.53E+00 2.59E+00
16 1.41E+01 1.43E+01 1.45E+01 66 2.40E+00 2.45E+00 2.51E+00
17 1.35E+01 1.37E+01 1.39E+01 67 2.32E+00 2.38E+00 2.44E+00