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Impeller and/or shaft tted 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, t 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 lter material (particularly pre-lter
material).
Filter material lled into net bag
Do not ll long-term biological lter material e.g.
JBL MicroMec, JBL Sintomec etc. in nely meshed
net bags. For special problem solutions, only use
the original CristalPro lter material with the
appropriate foam edge.
Filter material not cleaned thoroughly
Remove lter material from lter basket and
clean.
Incorrect lter material used
Fill ne lter material e.g. lterwool loosely
into the lter baskets so that water ow 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 tted 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 clarier etc.) reduce water
ow. 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 o 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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