Troubleshooting – STIEBEL ELTRON SOM 6 PLUS User Manual
Page 20
20
5. Troubleshooting
Operating control lamp
Warning symbols
Operating control lamp flashes red. On the display the
symbols
and
appear.
VBus
®
terminals
power supply
terminals
fuse
load terminals
sensor terminals
ground
terminals
In the case of an error, a message is shown on the display of
the controller:
Sensor defect. An error code instead of
a temperature is displayed in the sensor
display channel.
- 88.8
888.8
Cable broken.
Check cable.
Short circuit. Check
cable.
Disconnected Pt1000 temperature sensors
can be checked with an ohmmeter. In the
following table, the resistance values with
the corresponding temperatures are shown.
Operating control lamp off.
Check the power supply. Is it disconnected?
no
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).
yes
Check the supply line and
reconnect it.
°C
°F
Ω
°C
°F
Ω
-10
14
961
55
131
1213
-5
23
980
60
140
1232
0
32
1000
65
149
1252
5
41
1019
70
158
1271
10
50
1039
75
167
1290
15
59
1058
80
176
1309
20
68
1078
85
185
1328
25
77
1097
90
194
1347
30
86
1117
95
203
1366
35
95
1136
100
212
1385
40
104
1155
105
221
1404
45
113
1175
110
230
1423
50
122
1194
115
239
1442
Resistance values of the Pt1000-sensors