STIEBEL ELTRON SOM 8 PLUS - Page 78

78
Display illuminated?
If not, press button
5
. Display illumi-
nated now?
Is the pump current enabled by
the controller?
Does the pump start up in
manual operation?
The solar circuit pump does not work, although the collector is considerab-
ly warmer than the store.
yes no
yes
There is no current; check
fuses / replace them and check
power supply.
The adjusted temperature
dierence for starting the
pump is too high; choose a va-
lue which makes more sense.
no
yes
Is the pump stuck?
Turn the pump shaft using a
screwdriver; now passable?
Pump is defective - replace it.
no
yes
Stores cool down at night.
Collector circuit pump runs
during the night?
no yes
Check controller
Check the non-return valves in
the ow and the return pipe for
functional eciency.
Sucient store insulation?
yes no
Increase insulation.
Insulation close enough to
the store?
yes no
Replace insulation or increase it.
Are the store connections
insulated?
yes no
Insulate the connections.
Warm water outow upwards?
no yes
Change connection and let the
water ow sidewards or through
a siphon (downwards); less store
losses now?
no yes
o.k.
a
Collector temperature at night
is higher than the outdoor
temperature.
no yes
no
Controller might be defective
- replace it.
295931-36390-8667 SOM 8 plus_en.indb 78 20.10.2011 13:14:59