Caleffi solar iSolar 2 Handbuch - Seite 17
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Seite drucken5. Troubleshooting
fuse T4A
Operating control lamp flashes red. The symbol
the
are shown.
Sensor fault. An error code instead of
a temperature is shown on the sensor
display channel.
888.8
Cable is broken.
Short-circuit.
Check the cable.
Check the cable.
Disconnected Pt1000 temperature sen sors
can be checked with an ohmmeter. In the
following table, the resistance values
corresponding to different temperatures
are listed.
°F
Ω
°F
14
961
131
23
980
140
32
1000
149
41
1019
158
50
1039
167
59
1058
176
68
1078
185
77
1097
194
86
1117
203
95
1136
212
104
1155
221
113
1175
230
122
1194
239
Resistance values of the
Pt1000-sensors
and
- 88.8
Ω
1213
1232
1252
1271
1290
1309
1328
1347
1366
1385
1404
1423
1442
If a malfunction occurs, a message is displayed in the display
of the controller:
Operating control lamp off
Check the power supply
o.k.
The fuse of the controller could be blown.
It can be replaced after the front cover
has been removed (spare fuse is enclosed
in the accessory bag).
Warning symbol
Operating control lamp
17 |