Mitsubishi Heavy Industries FDT Series Technical Manual page 449

Error code
E28
Remote controller:
3.
PCB
Note:
RUN light TIMER light
Indoor
display – –
Green LED Red LED
Outdoor
control PCB
Stays OFF
Is the remote
controller temperature thermistor
connected properly?
YES
Are the
characteristics of
remote controller temperature
thermistor OK?
Is the thermistor wire
OK?
Resistance-temperature characteristics of remote controller temperature thermistor (ThC)
Temperature (°C) Resistance value (k )
0
1
2
4
6
8
10
12
14
16
18
20
22
24
26
28
- - 448 448
Content
NO
NO
YES
Temperature (°C)
65 30
62 32
59 34
53 36
48 38
44 40
40 42
36 44
33 46
30 48
27 50
25 52
23 54
21 56
19 58
18 60
- -
'12 • PAC-T-173
Correct.
Replace.
PCB Replace.
Resistance value (k )
16
15
14
13
12
11
9.9
9.2
8.5
7.8
7.3
6.7
6.3
5.8
5.4
5.0