8 Troubleshooting
Pump does not deliver
Trouble
No or too less water in the pump
casing
Suction hose is leaky
Suction depth is too high
Pumps has been applicated without
suction basket. The pump is blocked
by bigger solids (stones, wooden
parts, etc.)
Pump does not achieve the rated output
Trouble
Pumps with 3~ 400 V electric
motor only: pump has wrong
sense of rotation
The suction basket is blocked by
solids
The pressure hose is kinked
Liquid is thickening, the specific
density ratio to the suction
depth is inappropriate
Impeller or/and diffuser is worn out
9 Disposal
This product and parts of it have to be disposed at your local disposal area or at
the manufacturer.
Allzweckpumpen NP 4, NP 8, NP 12
Troubleshooting
Fill water into the pump casing
Check if couplings are damaged and
replace it, or replace the suction hose
Position pump close to the water
Dismantle the pump casing by
unbolting the screws (see also in
chapter 7.3), pull off the diffuser, and
clean the pump
Troubleshooting
Change sense of rotation at the
motor protection plug (see more at
chapter 5.4)
Pull out the suction hose from the
heavy polluted area in a lighter
polluted area
Change position of the hose
Add water or decrease suction
depth
Replace worn out parts
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