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ECOTRONIC Plus
© F
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roli 08164 ECO
TR
ONIC Plus.monen.ind
d
Pump starts for a short moment, switches-off, switches-on
again, etc.
Temperature difference
at the controller too
small?
no
yes
Wrong position of collec-
tor sensors?
yes
Change
D
Ton and
D
Toff
correspondingly.
Mount the collector sen-
sor at solar flow (warmest
collector output); use im-
mersion sleeve of the re-
spective collector.
Pump starts up very late
The temperature diffrence between store and collector
increases enormously during operation; the collector
circuit cannot dissipate the heat.
Collector circuit pump
defective?
no
yes
Heat exchanger calcified?
yes
check / replace it
Decalcify it
no
Heat exchanger blocked?
yes
no
Clean it
Heat exchanger too
small?
yes
Repalce with correctly
sized one.
no
Plausibility control of
the option tube collec-
tor special function
Change
D
Ton and
D
Toff
correspondingly.
Switch-on temperature
difference
D
Ton to large?
no
yes
Non-ideal position of the coll-
ector sensor (e.g. flatscrew
sensor instead of sensor in
immersion sleeves).
o.k.
no
Pump is overheated, but no heat transfer from the colle-
ctor to the store, flow and return have the same tempe-
rature; perhaps also bubble in the lines.
Air the system; in crease
the system pressure to
at least static primary
pressure plus 0,5 bar; if
necessary continue to
increase pressure; switch
the pump off and on for a
short time.
Air in the system?
no
yes
Is the collector circuit
blocked at the dirt trap?
yes
Clean the dirt trap.
4. Various:
Activate tube collector
function if necessary.
o.k.
yes
