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The proper functioning of the filter should be checked on a regular basis. If necessary, please clean replace the
filter mesh.
11. 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.
To prevent possible malfunction, it is recommended to check the occurring pressure and the energy consumption
at regular intervals. Also, the pre-pressure (atmospheric pressure) in the pressure tank should be checked
regularly. To do so, please separate the pump from mains, then open any consumer component in the pressure
line - for instance, a water tap - to release the pressure from the hydraulic system. Subsequently, unscrew the
protection cap of the tank valve (12). On the tank valve, please use a pressure gauge to check the pre-pressure.
It should read 1.5 bar, otherwise it has to be corrected.
If any water is leaking out of the tank valve, the membrane is defective and should be replaced. A high-quality,
food-proof membrane (item no. 30905) is available as a spare part.
If the device is not in use over some extended period of time, both the pump and the pressure tank should be
emptied using the devices provided for this purpose.
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.
POSSIBLE CAUSE
1. No current.
2. Thermal motor protection feature has
triggered.
3. The capacitor is defective.
4. The motor shaft is jamming.
5. Wrong setting of the pressure switch.
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.
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ELIMINATION
1. 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.
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.
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