Cosmo Multi 3 Montage- Und Bedienungsanleitung Seite 179

16. TROUBLESHOOTING
Circulation pump and blocking
valve should be switched off for
1 night; less store losses?
yes no
Check the non-return valve in
warm water circulation - o.k.
yes no
The gravitation circulation
in the circulation line is too
strong; insert a stronger valve
in the non-return valve or an
Check whether the pumps of the
after-heating circuit run at night;
check whether the non-return
valve is defective; problem solved?
no
Further pumps which are con-
nected to the solar store must
also be checked.
Clean or replace it.
electrical 2-port valve behind
the circulation pump; the 2-port
valve is open when the pump is
activated, otherwise it is closed;
connect pump and 2-port valve
electrically in parallel; activate
the circulation again. Deactivate
pump speed control!
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