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11 Troubleshooting table
WARNING
In the event of a malfunction or abnormal operation, shut off the pump immediately
to prevent a dangerous situation and/or damage to the unit.
Malfunction
Insufficient output
Insufficient suction
capacity during
commission
1. Inspection covers discharge
valves
2. Inspecttion covers both
suction and discharge valves
3. Gland plate
4. Inspectioncover ear collars
5. Inspectioncover suction
valves
6. Stonebox cleaning window
7. Inspection cover front
collars
Probable cause
Dry pump housing
Worn out collars
Defect suctionvalves
Stonebox is polluted
Leakage through
inspection cover gaskets
Leaking stuffing box
packing
Defect discharge valves
Worn out collars
Diagnose
Screaming sound with
every pump movement
Check the state of the
collars through
inspection covers 4 & 7
Remove inspection
covers 2 & 5 and check
for defects
Check the stonebox
through cover 6
Hissing sound
during/right after
commission near point
1,2,4,5,6 or 7
Hissing sound near
Stuffing box (3)
Remove inspection
window 1 & 2 and
check for defects
Check the state of the
collars through
inspection covers 4 & 7
Possible solution
Fill the pump housing
with at least 10 liter of
water (1 bucket)
Replace the collars
Remove any blokages
or worn out/broken
parts
Clean the stonebox
Tighten or replace
leaking gasket
Adjust the gland plate
Remove any blokages
or worn out/broken
parts
Replace the collars
20
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