9.
Maintenance and troubleshooting
Prior to carrying out any maintenance work, the pump must be separated from the electrical
mains. If you fail to separate the unit from mains, there is a risk of an inadvertent start of the
pump.
We decline any liability for damage caused by inappropriate repair attempts. Any damage
caused by inappropriate repair attempts will avoid all warranty claims.
Regular maintenance and thorough care will reduce the danger of possible malfunction and contribute to an
extension of the lifetime of your unit.
If the pump is to be put out of operation for some extended period of time, it should be emptied completely in by
opening the water drain screw (10). Subsequently, please flush the pump with clean water. Then allow the pump
body to dry completely in order to prevent corrosion damage.
Water left in the pump may freeze in case of frost and thus cause considerable damage. 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.
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POSSIBLE CAUSE
1. No current.
2. Thermal motor protection feature has
triggered.
3. The capacitor is defective.
4. The motor shaft is jamming.
5. The electronic pump control is defective.
6. The anti dry-running feature is activated
(red "Error" indicator lights up).
1. The pump housing is not filled with liquid.
2. Air penetrates into the intake line.
3. Suction height and/or discharge height too
great.
1. The electrical supply does not correspond
to the information given on the type plate.
2. Pump or intake line are blocked by solids.
3. Liquid is too viscous.
4. Temperature of liquid or environment is
too high.
6
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. Check the cause, eliminate the reason for
the jamming of the pump.
5. Please contact the customer service
department.
6. Refer to section 4.1.
1. Fill the pump housing with liquid (please
refer to "Putting into operation" section).
2. Check to make sure that:
a.) the connection points of the intake line are
tight;
b.) the inlet opening of the intake line
including the check valve (non-return valve)
are immersed into the liquids being
discharged;
c.) the check valve (non-return valve) with the
filter is tight and not jammed;
d.) no siphons (i.e. permanently liquid-filled
loops), kinks, counter-slopes or narrow spots
are present along the intake lines.
3. Change the arrangement of the installation
so that the suction height and/or discharge
height will not exceed the max. value.
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 and the environment do
not exceed the max. admissible values.