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The following tests and troubleshooting steps may only be undertaken by authorised and qualified persons. If in doubt,
please contact your specialist dealer (see stamp on the cover sheet) who installed the system initially.
8.1 General malfunctions
Malfunction
1
Pumps do not start.
2
Pumps are running,
alarm level is reached /
is displayed.
3
Wastewater does not drain,
backlog in the lowest drain
points
4
System sudden becomes loud
8. Malfunctions and troubleshooting
Caution
Motor circuit breaker has trigge-
red, motor is blocked
Motor is labouring
1 or 2 phases have no current
Control system fails due to heavy
fluctuations of the mains supply
Wrong revolving field
System is overloaded.
Pump output too low
backflow preventer not in operating position
System not switched on
Electrical power cable to the swit-
chgear without current
Level control is not working cor-
rectly
Supply line to the system is blocked
Intake valve to the system (if there is
one) is not open or not compl. ope-
ned
Wastewater temperature is too
high over a longer period of time
(15 min.); this limits the suction ca-
pacity of the system
Foreign body has damaged parts of
the pump
Foreign body inside the pump
21
Troubleshooting
Remove the pump; remove the blockage (for-
eign body) in the impeller or casing
Maintenance / repair by the Customer Service
Check the cut-outs and electrical cables
Retrofit a battery in the switchgear and inform
the power supplier.
2 Exchange the phases of the power supply
Check if there is a brief excess of wastewater;
if necessary refrain from using the drain points
temporarily or if possible, drain the wastewa-
ter through a different channel
• Remove the foreign body from the impeller or
casing
• Remove the foreign body from the pressure
fitting or the pressure pipe
• Pumps are worn, arrange for them to be
exchanged
• Lifting system wrongly designed, clarify with
the KESSEL Customer Service
Bring the backflow preventer into the operating po-
sition
Switch on master switch.
Check cut-out. Check power supply
Check for soiling, check the switch points and
function of the level control
Clean the supply line
Completely open the intake valve
Reduce the temperature of the wastewater
Check the pump parts and replace if neces-
sary
Check the pump parts and replace if neces-
sary
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