en
32
Installation Commissioning Settings AccessoriesTroubleshooting
Display
The system overview shows an error code (888 or -888) instead of a measured
value.
Sensor fault. An error code instead of a temperature is shown on the sen-
sor display channel.
Disconnected Pt1000 temperature sensors can be checked with an ohm-
meter. Please check the resistance values correspond with the table.
- 888888
Cable is broken.
Check the cable.
Short circuit.
Check the cable.
°C Ω °C Ω
-10 961 55 1213
-5 980 60 1232
0 1000 65 1252
5 1019 70 1271
10 1039 75 1290
15 1058 80 1309
20 1078 85 1328
25 1097 90 1347
30 1117 95 1366
35 1136 100 1385
40 1155 105 1404
45 1175 110 1423
50 1194 115 1442
Resistance values of Pt1000
sensors
The display is permanently off.
If the display is off, check the power supply of the controller. Is it discon-
nected?
no
yes
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 supply line and recon-
nect it.
In the case of a sensor fault, an error code (888 or -888) instead of a temperature
is displayed in the sensor display channel. Furthermore, the whole display starts
flashing
Note:
For answers to frequently asked questions (FAQ) see www.resol.com.
9 Troubleshooting
fuse T4A
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