11 Troubleshooting
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 yes
Controller has been in
standby, everything o.k.
Check the supply line and recon-
nect it.
The fuse of the controller could be
blown. The fuse holder (which holds
the spare fuse) becomes accessible
when the cover is removed.The fuse
can then be replaced.
Check the power supply of the controller. Is it disconnected?
no yes
Disconnected temperature sensors can be checked with an
ohmmeter. Please check if the resistance values correspond
with the table.
°C °F Ω
Pt500
Ω
Pt1000
Ω
KTY
°C °F Ω
Pt500
Ω
Pt1000
Ω
KTY
-10 14 481 961 1499 55 131 607 1213 2502
-5 23 490 980 1565 60 140 616 1232 2592
0 32 500 1000 1633 65 149 626 1252 2684
5 41 510 1019 1702 70 158 636 1271 2778
10 50 520 1039 1774 75 167 645 1290 2874
15 59 529 1058 1847 80 176 655 1309 2971
20 68 539 1078 1922 85 185 664 1328 3071
25 77 549 1097 2000 90 194 634 1347 3172
30 86 559 1117 2079 95 203 683 1366 3275
35 95 568 1136 2159 100 212 693 1385 3380
40 104 578 1155 2242 105 221 702 1404 3484
45 113 588 1175 2327 110 230 712 1423 3590
50 122 597 1194 2413 115 239 721 1442 3695
Control LED in the Lightwheel
®
is ashing red. The symbol ☍ is indicated on the
display and the symbol ⚠ is ashing.
Sensor fault. An error code instead of a temperature is shown
on the corresponding sensor display channel.
- 88.8888,8
Cable is broken.
Check the cable.
Short circuit.
Check the cable.
Fuse
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