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The system must be checked once every month by the operator through observation of the switching routine for operatio-
nal ability and leaks.
8.1 General malfunctions
8. Malfunctions and troubleshooting
1
Pumps do not start
Operating mode switch is not set to
"auto" (only up to model year 12/09)
Motor protection switch has trigge-
red, motor is blocked
Motor turns sluggishly
1 or 2 phases have no current
Control fails on account of heavy
fluctuations in the mains power
supply
Pressure sensor not airtight or PE
hose not connected
Malfunction Cause Remedial measure
Set switch to "auto"
Remove pump; eliminate blockage (object) in
the impeller or housing area
Maintenance / repair by Customer Services
Check fuses and power supply
cables
Retrofit battery in the switch unit and
inform power supply company.
Check all screw connections for air-tightness
2
Pumps are running,
Alarm level is reached /
is indicated
3
Pumps run roughly or loud
and LED "phase/rotary field"
lights up (only up to model
year 12/09))
3
Pumps run roughly or loud
and
LED
"phase/rotary
field" does not light up
(only
up to model year 12/09)
4
Wastewater is not drained
off, backwater at the lowest
draining points
System is overloaded
Too little pumping capacity.
Aeration device not in operating position
Wrong direction of rotation for
motor
In the case of twin systems, both
motors are rotating the wrong way
Reduced
capacity
through
damage
Wrong direction of rotation for
motor
In the case of twin systems, both
motors are rotating the wrong way
Systems not switched on
Power supply cable to the switch
unit without current
Level control malfunction
Inlet pipe to the system blocked
Check whether there is a short-term increase in
wastewater occurrence; if possible do not use
drainage points temporarily or divert wastewa-
ter elsewhere if possible
• Eliminate object in the impeller or housing
area
• Remove the object from the pressure fitting or
pressure pipe
• Pumps are worn, have them replaced
• Wrong lifting station design, clarification
through KESSEL Customer Services
Put aeration device into operating position
Check direction of rotation, if incorrect swap
2 phases of the supply cable
Swap 2 phases in the supply cable of the
switch unit
Check pump(s) and motor(s); have damaged
parts replaced by Customer Services
Check the direction of rotation, if incorrect swap
2 phases of the motor supply cable (see sec-
tion 5.5)
Swap 2 phases of the motor supply cables of
the switch unit
Set switch to automatic
Check fuse. Check current supply.
Check soiling, switching points and function of
the level control
Clean inlet pipe
