Daikin FTXA20A - Page 152

2 | Components
Service manual
152
FTXA20~50A(W)(S)(T) + FTXA20~50B(B)(S)(T) + RXA42+50A +
RXA20~35A(9) + RXA42+50B
Split Stylish R32
ESIE18-03D – 2021.05
T °C kΩ T °C kΩ T °C kΩ T °C kΩ
–9
–8
–7
–6
–5
–4
–3
–2
–1
106.03
100.41
95.14
90.17
85.49
81.08
76.93
73.01
69.32
21
22
23
24
25
26
27
28
29
23.91
22.85
21.85
20.90
20.00
19.14
18.32
17.54
16.80
51
52
53
54
55
56
57
58
59
6.91
6.65
6.41
6.65
6.41
6.18
5.95
5.74
5.14
0 65.84 30 16.10 60 4.87
1
2
3
4
5
6
7
8
9
62.54
59.43
56.49
53.71
51.09
48.61
46.26
44.05
41.95
31
32
33
34
35
36
37
38
39
15.43
14.79
14.18
13.59
13.04
12.51
12.01
11.52
11.06
61
62
63
64
65
66
67
68
69
4.70
4.54
4.38
4.23
4.08
3.94
3.81
3.68
3.56
4 Measure the resistance between the appropriate connection points of the
thermistor.
5 Check that the measured resistance value matches the resistance determined
through the measured temperature (earlier step in the procedure). E.g:
▪ Measured temperature with contact thermometer: 23.1°C,
▪ Resistance value determined through temperature (using the thermistor
table A):
Resistance at 20°C: 24.3kΩ,
Resistance at 25°C: 19.4kΩ,
▪ Measure resistance between pin 1‑2:
Measured resistance: 21.86kΩ,
▪ Measured resistance value is inside the range. Thermistor passes the check.
INFORMATION
All thermistors have a resistance tolerance of 3%.
Does the measured resistance of the
thermistor match with the
temperature determined resistance?
Action
Yes Thermistor is OK. Return to the
troubleshooting of the specific error
and continue with the next procedure.
No Replace the specific PCB, see
"2Components"[440].