Cosmo Multi 2 Montage- Und Bedienungsanleitung Seite 116

116
5. Troubleshooting
Pump is overheated, but no heat transfer from the
collector to the store, flow and return have the same
temperature; perhaps also bubble in the lines.
Air in the system?
no yes
Is the collector circuit
blocked at the dirt trap?
yes
Pump starts up very late
Switch-on temperature
difference DTon to
large?
no yes
Non-ideal position of
the collector sensor (e.g.
flatscrew sensor instead
of sensor in immersion
sleeves)?
yes
Air the system; in crease
the system pressure to
at least static primary
pressure plus 0,5 bar;
if necessary continue
to increase pressu-
re; switch the pump
off and on for a short
time.
Clean the dirt trap
Change DTon and DToff
correspondingly.
Activate tube collector
function if necessary.
o.k.
Pump starts for a short moment, switches-off, swit-
ches-on again, etc.
Temperature difference
at the controller too
small?
no yes
Wrong position of colle-
ctor sensors?
no
yes
Plausibility control of
the option tube colle-
ctor special function
The temperature diffrence between store and coll-
ector increases enormously during operation; the
collector circuit cannot dissipate the heat.
Collector circuit pump
defective?
no yes
Heat exchanger calci-
fied?
no yes
Heat exchanger
blocked?
no yes
Heat exchanger too
small?
yes
Change DTon and
DToff correspondingly.
no o.k.
Mount the collector
sensor at solar flow
( w a r m e s t c o l l e c t o r
output); use immersion
sleeve of the respective
collector.
check / replace it
Decalcify it
Clean it
Repalce with correctly
sized one.