Troubleshooting - Renkforce 2302379 Bedienungsanleitung

12. Troubleshooting

The pump you have purchased is a product that has been designed according to the state of the art and is reliable in
operation. However, problems and malfunctions can still occur. Therefore, observe the following information on how
to solve the possible malfunctions.
The pump does not suck
• Open all available shut-off valves. Closing a shut-off valve on the pressure side prevents air from getting into the
hose or in the pump.
• Fill the pump and suction hose with water.
• Use a backflow preventer at the end of the suction hose.
• If the suction hose end has a coarse filter, check it for soiling and clean if necessary.
• Check the suction hose and all connectors for leaks.
Pump does not run or stops during operation
• Is the pump correctly connected to the mains voltage (mains socket)?
• Check the mains supply or the circuit breaker and the ground fault circuit interrupter. If the ground fault circuit inter-
rupter has tripped, you must disconnect the pump from the mains voltage and check it for damage (e.g. power cord/
housing). Stop using the pump immediately if it is damaged!
• The impeller inside the pump is blocked by dirt. Disconnect the pump from the mains voltage, remove the hoses
and sealing plugs and rinse the inside of the pump with clean water.
• The overtemperature protection has tripped. Disconnect the pump from the mains voltage and allow it to cool down
(at least 30 minutes). Eliminate the cause of the trip (e.g. water temperature too high, dry running too long etc.).
Flow rate decreases or is too low
• Check the suction hose or its coarse filter/backflow preventer for soiling.
• Clean the pump filter.
• The pump sucks in air because the suction hose is not in the water, damaged (cracked) or not correctly connected
to the pump.
• Check the hoses for leaks or kinks.
• As a matter of principle, the flow rate decreases with greater suction height and pump head. Refer to the diagram
in the section "Technical data".
• The hose diameter of the suction hose is too low.
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