EHEIM Professionel 3 250 Mode D'emploi page 18

Cause
Prefilter flap in prefilter
not closed.
Prefilter is filled with water.
Check valve polluted / defective.
. . . Pump does not work
Cause
No mains supply.
Shaft broken.
Impeller missing or blocked by bits
of gravel, shells or similar.
. . . Filter performance has greatly deteriorated
Cause
Safety adapter lever position not correct.
Safety adapter soiled.
Hose installation.
Hose installation soiled.
Strainer blocked.
Filter media heavily soiled.
Filter media filled into a net bag.
Filter media not cleaned properly.
Filter media wrongly assembled.
Filter pad not renewed.
Pump is dirty.
Water is not circulating properly.
Too many accessories installed
on the hose system.
. . . Air in the filter
Cause
Solution
Check the prefilter flap for pollution and, if required, clean it.
The prefilter flap must be unobstructed (see chapter 6.2, step 13).
Empty prefilter, repeat priming. Priming only works with empty prefilter.
Clean and, if required, replace the check valve (see chapter 6.3).
Solution
Plug in to mains.
Renew shaft (see list of spares).
Fit impeller, clean pump chamber.
Solution
Check lever setting and adjust.
Remove safety adapter; open shut-off lever and clean openings
with EHEIM cleaning brush (no. 4005570).
Check that there are no kinks or marked narrowing of cross-section.
Clean hose installation with universal cleaning brush (no. 4005570).
Remove coarse dirt, clean strainer.
Clean filter media.
Never put long-term filter media in net bags or nylon stockings. This
leads to a drastic reduction in pump performance within a short time.
When cleaning, remove the filter media from the filter media basket
and rinse through with lukewarm water.
Check that filter media have been assembled correctly in the recom-
mended layers of filtering. Fill bottom filter insert to just under edge
with EHEIM MECH. Fill next filter inserts with EHEIM SUBSTRAT, also
to just under edge. Never place white filter pad under the handle.
Be sure to renew the filter pad each time you clean.
Clean pump chamber, cooling and lubrication channel with EHEIM
cleaning brush set (no. 4009560).
Take filter into operation by priming (as described in the instructions).
Make sure that the water runback (delivery side) is above the surface
of the water during filling so that air is optionally bled from the device.
Connected accessories reduce filter performance. Check and remove
unnecessary accessories or operate via a separate water system.
Solution
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