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disassembly as well as the replacement of parts must only be done by the manufacturer or a by an authorised
service provider.
Water left in the pump may freeze in case of frost and thus cause considerable damage. Therefore, the pump
must be removed from the liquid being discharged and fully drained when temperatures are below the freezing
point of the liquid. Please store the pump in a dry, frost-protected place.
In the case of malfunction, you should first of all check whether it was caused by an operating error or some other
reason which cannot be attributed to a defect of the device - for instance a power failure.
The list below shows some possible malfunctions of the device, possible causes and tips on their elimination. All
the measures referred to may only be carried out with the pump being separated from the electrical mains. If you
yourself feel unable to eliminate any of these malfunctions, please contact the customer service department or
your point of sales. Any repair beyond the scope specified below must only be performed by qualified staff.
Please bear in mind that all warranty claims will become void in the case of damage caused by inappropriate
repair attempts, and that we decline any liability for any ensuing damage.
MALFUNCTION
1. The pump is not discharging
any liquid, the motor is not
running.
2. The motor is running, but the
pump is not discharging any
liquid.
3. The pump stops after a short
time of operation because the
thermal motor protection feature
has triggered.
4. Intermittent or irregular
operation.
5. Water quantity discharged by
pump is inadequate.
6. The pump does not cut in or
out.
POSSIBLE CAUSE
1. No current.
2. Thermal motor protection feature has
triggered.
3. The capacitor is defective.
4. The pump wheel is blocked.
5. The floating switch is defective.
1. The intake openings are clogged.
2. The pressure line is clogged.
3. Air penetrates into the pump body.
4. The min. suction level was fallen short of;
possibly incorrect setting of the floating
switch, motion of floating switch restricted,
floating switch defective.
5. Check valve (non-return valve), if present,
is blocked or defective.
1. The electrical supply does not correspond
to the information given on the type plate.
2. Pump or intake openings are blocked by
solids.
3. Liquid is too viscous.
4. Temperature of the liquid is too high.
5. Pump is running dry.
1. Pump wheel obstructed by solid matters.
2. Refer to section 3.3.
3. Refer to section 3.4.
4. Mains voltage out of tolerance.
5. Motor or pump wheel defective.
1. Refer to section 2.1.
2. Refer to section 2.2.
3. Worn pump wheel.
1. Floating switch cannot move freely.
2. Incorrect setting of floating switch.
3. Floating switch defective.
5
ELIMINATION
Please use a device complying with GS
(German technical supervisory authority) to
check for the presence of voltage (safety
information to be observed!). Please verify
the correct position of the plug.
2. Separate the pump from the electrical
mains, allow the system to cool down,
eliminate cause.
3. Please contact the customer service
department.
4. Eliminate blocking of pump wheel.
5. Please contact the customer service
department.
1. Remove possible congestion.
2. Remove possible congestion.
3. Start pump several times so that the entire
air will be driven out.
4. Make sure that the minimum suction level
is not fallen short of; if necessary, adjust
floating switch properly or make sure that it
can move freely; in the case of a defective
floating switch, please contact customer
service.
5. Eliminate blocking of the check valve (non-
return valve) or replace, if damaged.
1. Please use a device complying with GS
(German technical supervisory authority) to
check the voltage of the lines of the
connection cord (safety information to be
observed!).
2. Remove possible congestion.
3. Pump may not be suitable for this liquid. If
feasible, the liquid should be thinned.
4. Make sure that the temperature of the
liquid being pumped does not exceed the
max. admissible value.
5. Eliminate causes of dry-running.
1. Remove solids.
2. Refer to section 3.3.
3. Refer to section 3.4.
4. Make sure that mains voltage matches that
indicated on the type plate.
5. Please contact the customer service
department.
1. Refer to section 2.1.
2. Refer to section 2.2.
3. Please contact the customer service
department.
1. See that floating switch can move freely.
2. Correct floating switch settings.
3. Please contact the customer service
department.
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