27
Impeller and/or shaft fitted crooked, shaft broken,
rubber bearings of shaft missing, bayonet lock on
impeller casing not positioned correctly
Dismantle, check, replace faulty parts and re-
assemble. Check shaft and bayonet lock correctly
positioned.
Impeller missing or blocked by gravel, wormgear
casing or impeller faulty
Clean impeller casing, fit intact impeller
Filter capacity greatly reduced
Cause
Solution
Stopcocks levers on pump head not in “OPEN”
position
Check positions and correct them
Hose connection block dirty
Remove hoses and use suitable brushes to clean
hose connection block whilst in position with
stopcocks in “OPEN” position
Hoses kinked etc.
Check hoses for kinks, constrictions etc.
Intake strainer blocked
Clean intake strainer
Hoses blocked with sediment
Clean hoses with cleaning brush
Filter material heavily soiled
Clean filter material (particularly pre-filter
material).
Filter material filled into net bag
Do not fill long-term biological filter material e.g.
JBL MicroMec, JBL Sintomec etc. in finely meshed
net bags. For special problem solutions, only use
the original CristalProfi filter material with the
appropriate foam edge.
Filter material not cleaned thoroughly
Remove filter material from filter basket and
clean.
Incorrect filter material used
Fill fine filter material e.g. filterwool loosely
into the filter baskets so that water flow is not
obstructed.
Pump dirty
Clean pump chamber, impeller and cover with
cleaning brush (10)
Water does not circulate correctly
Repeat start procedure (5)
Impeller and/or shaft fitted crooked, shaft broken,
rubber bearings of shaft missing, bayonet lock on
impeller casing not positioned correctly
Dismantle, check, replace faulty parts and re-
assemble. Check shaft and bayonet lock correctly
positioned.
Too many accessories attached to hose system
Accessories (e.g. UV-C clarifier etc.) reduce water
flow. Remove accessories or operate with own
separate water circulation.
Air in filter
Cause
Solution
Connection of telescopic suction pipe is above
the surface of the water
When carrying out a partial change of water,
siphon off water to approx. 5 cm above the
connection only. Otherwise disconnect plug.
Filter is positioned too high
The top of the pump head should be at least 20
cm below the surface of the water, the further the
better.
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