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Si21-205
Troubleshooting for Indoor Unit
Troubleshooting
163
Check No. 2
Check for Thermistors
Disconnect the thermistor connector from PC board, then measure the resistance by using a
tester.
Thermistor temperature and resistance characteristics
Unit : k
Ω
Temperature
˚C
A
B
-6.0
90.8
88.0
-4.0
81.7
79.1
-2.0
73.5
71.1
0.0
66.3
64.1
2.0
59.8
57.8
4.0
54.1
52.3
6.0
48.9
47.3
8.0
44.3
42.9
10.0
40.2
38.9
12.0
36.5
35.3
14.0
33.2
32.1
16.0
30.2
29.2
18.0
27.5
26.6
20.0
25.1
24.3
22.0
23.0
22.2
24.0
21.0
20.3
26.0
19.2
18.5
28.0
17.6
17.0
30.0
16.2
15.6
32.0
14.8
4.2
34.0
13.6
13.1
36.0
12.5
12.0
38.0
11.5
11.1
40.0
10.6
10.3
42.0
9.8
9.5
44.0
9.1
8.8
46.0
8.4
8.2
48.0
7.8
7.6
50.0
7.2
7.0
52.0
6.9
6.7
54.0
6.2
6.0
56.0
5.7
5.5
58.0
5.3
5.2
Application
Heat exchanger
(Indoor/Outdoor units)
Suction air
Remote controller
Air
Outdoor air
Suction pipe
Radiator fin
Summary of Contents for Sky Air B-Series R-410A
Page 7: ...Si21 205 vi Table of Contents ...
Page 15: ...Models Si21 205 4 Model Name and Power Supply ...
Page 16: ...Si21 205 Functions 5 Part 2 Functions 1 List of Functions 6 ...
Page 35: ...Wireless Remote Controller Si21 205 24 Remote Controller ...
Page 79: ...Settings Concerning Maintenance Si21 205 68 Field Setting Detail of PCB 2 ...
Page 83: ...Maintenance Mode Setting Si21 205 72 Field Setting ...
Page 239: ...Troubleshooting for Outdoor Unit 50 60 class Si21 205 228 Troubleshooting ...
Page 321: ...Outdoor Unit 50 60 class Si21 205 310 Removal Procedure ...