Troubleshooting Tips - Stiebel Eltron SOM 6 PLUS Utilisation Et Installation

2.7 Troubleshooting tips

If a fault occurs, a message appears on the
controller display:
ON/OFF indicator flashing red. The display
shows symbol and symbol
Sensor faulty. An error code is displayed in the
appropriate sensor display channel instead of
a temperature.
888.8
Short circuit. Check
Lead broken. Check
lead. lead.
Disconnected Pt1000 temperature sensors
can be checked using a resistance meter. The
the resistance readings are as follows for the
corresponding temperatures.
:
°C °C
-10 961 55
-5 980 60
65
0 1000
70
5 1019
75
10 1039
80
15 1058
85
20 1078
90
25 1097
95
30 1117
100 1385
35 1136
105 1404
40 1155
110 1423
45 1175
115 1442
50 1194
Resistance values of the
Pt1000 sensors.
ON/OFF indicator is permanently OFF.
When the ON/OFF indicator is extinguished,
check the controller power supply.
no
Warning
symbol
The controller fuse has blown. This is
accessible once the cover is removed and can
ON/OFF
then be replaced (a spare fuse can be found in
indicator
the accessories bag).
The pump runs hot but no heat is transported
from the collector to the cylinder; flow and
return are the same temperature; possible
gurgling in the line.
is flashing.
!
Air in the system?
no
Is the collector
circuit blocked at the
- 88.8 dirt trap?
yes
Clean dirt trap.
Pump appears to cut in late.
Start temperature
differential 'Ton set too
:
high?
1213
no
1232
1252
1271
Collector sensor not
1290
in good position (e.g.
1309
contact sensor instead
1328
1347 of immersion sensor)?
1366
yes
If necessary, enable
tube collector
function.
OK
Pump switches ON briefly, cuts out, switches
ON again, and so forth.
(controller "wobble").
Is the temperature differential
at the controller too small?
OK
Collector sensor
incorrectly positioned?
Check plausibility
of options; tube
collector function.
yes
Vent system;
check system
pressure and set, if
necessary; possibly
The temperature differential between the
increase pressure;
cylinder and the collector become very high
switch pump ON
during operation; the collector circuit cannot
and OFF briefly.
dissipate the heat.
Collector circuit
pump faulty?
Internal indirect coil
scaled-up?
yes
'Ton and 'Toff
accordingly.
Internal indirect coil
clogged?
Internal indirect coil
too small?
no yes
'.SLYRP 'Ton and
'Toff accordingly.
no
no
yes
Position collector
sensorat solar flow
(warmest collector
outlet); use sensor
well of appropriate
collector.
no yes
Check/replace.
no yes
Descale.
no yes
Flush.
yes
Resizing.
OK
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