Cosmo Multi 3 Montage- Und Bedienungsanleitung Seite 178

178
16. TROUBLESHOOTING
The solar circuit pump does not work, although the collector is considera-
bly warmer than the store.
Display illuminated?
If not, press button ➄. Display
illuminated again?
yes no
Does the pump start up in man-
ual operation?
no yes
Is the pump current enabled by
the controller?
no yes
Controller might be defective -
replace it.
Pump is defective - replace it.
Stores cool down at night.
Collector circuit pump runs
during the night?
no yes
Collector temperature at night is
higher than the outdoor temperature.
no yes
Sufficient store insulation?
yes no
Insulation close enough to the store?
yes no
Are the store connections insulated?
yes no
Warm water outflow upwards?
no yes
Does the DHW circulation run for
a very long time?
no yes
There is no current; check fuses
/ replace them and check power
supply.
The adjusted temperature
difference for starting the pump
is too high; choose a value which
makes more sense.
Is the pump stuck?
yes
Turn the pump shaft using a
screwdriver; now passable?
no
Check controller
Check the non-return valves in
the flow and the return pipe for
functional efficiency.
Increase insulation.
Replace insulation or increase it.
Insulate the connections.
Change connection and let the
water flow sidewards or through
a siphon (downwards); less store
losses now?
no yes
o.k.
Use the circulation pump with
timer and switch-off thermostat
(energy-efficient circulation).