37
Room temp,indoor coil sensor,R
25
=5K
Ω
,B
25
/
50
=3470K
Resistance(k
Ω
)
Temp
℃
26
28
30
32
34
36
38
40
42
44
46
48
50
52
54
56
58
60
4.811
4.458
4.134
3.837
3.564
3.313
3.083
2.870
2.675
2.494
2.328
2.174
2.032
1.901
1.779
1.666
1.562
1.465
Nomal resistance of indoor coil temp sensor.
Temp
℃
Resistance(k
Ω
)
-10
-8
-6
-4
-2
0
2
4
6
8
10
12
14
16
18
20
22
24
22.40
20.38
18.56
16.93
15.45
14.12
12.92
11.84
10.85
9.962
9.153
8.418
7.749
7.141
6.587
6.081
5.619
5.197
25
5.000
The flow chart of faults diagnoses.
Faults & self-diagnoses
Connect the conne
-cting clamp
Repair the welding
face
The connecting clamp
sensor fall off
The coppor foil in welding face of
connecting clamping fall off
Confirm the connection of
sensor fall off?
Check the resistance
is normal or not
Yes
No
Yes
No
Room temp sensor default
Indoor coil temp sensor default
Sensor short or
open circuit
PCB fault
Change the sensor
Change the PCB
