10 Troubleshooting
®
Control LED in the Lightwheel
is flashing red. The symbol
display and the symbol
flashes.
Sensor fault. An error code instead of a temperature is shown
on the corresponding sensor display channel.
888.8
Cable is broken.
Check the cable.
Disconnected temperature sensors can be checked with an
ohmmeter. Please check if the resistance values correspond
with the table.
°C °F
Pt500 Pt1000 KTY
-10
14
481
961
1499
-5
23
490
980
1565
0
32
500
1000
1633
5
41
510
1019
1702
10
50
520
1039
1774
15
59
529
1058
1847
20
68
539
1078
1922
25
77
549
1097
2000
30
86
559
1117
2079
35
95
568
1136
2159
40
104
578
1155
2242
45
113
588
1175
2327
50
122
597
1194
2413
is indicated on the
- 88.8
Short circuit.
Check the cable.
°C °F
Pt500 Pt1000 KTY
55
131
607
1213
2502
60
140
616
1232
2592
65
149
626
1252
2684
70
158
636
1271
2778
75
167
645
1290
2874
80
176
655
1309
2971
85
185
664
1328
3071
90
194
634
1347
3172
95
203
683
1366
3275
100 212
693
1385
3380
105 221
702
1404
3484
110 230
712
1423
3590
115 239
721
1442
3695
If a malfunction occurs, a message will appear on the display of the controller.
Lightwheel
®
or display are permanently off.
Press the right button (
). Display illuminated?
no
Check the power supply of the controller. Is it disconnected?
no
The fuse of the controller could be
blown. The fuse becomes accessible
when the cover is removed.The fuse
can then be replaced.
Fuse
yes
Controller has been in
standby, everything o.k.
yes
Check the supply line and recon-
nect it.
37
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