Lowara e-SV 1 Installation, Operation And Maintenance Manual page 20

en - Translation of the original instructions
7.10 The pump starts up too frequently
Cause
There is a leakage in one or both of the fol-
lowing components:
• The suction pipe
• The foot valve or the check valve
There is a ruptured membrane or no air pre-
charge in the pressure tank.
7.11 The pump vibrates and generates too
much noise
Cause Remedy
Pump cavitation Reduce the required flow rate by partially closing the
on-off valve downstream from the pump. If the prob-
lem persists check the operating conditions of the
pump (for example height difference, flow resistance,
liquid temperature).
The motor bearings Contact the Sales and Service Department.
are worn.
There are foreign Contact the Sales and Service Department.
objects inside the
pump.
For any other situation, refer to the Sales and Service Department.
16
Remedy
Repair or replace the faulty
component.
See the relevant instruc-
tions in the pressure tank
manual.
e-SV - English