Xylem e-SV - Manual (Page 20)

7.10 The pump starts up too frequently
Cause Remedy
There is a leakage in one or both of the fol-
lowing components:
• The suction pipe
• The foot valve or the check valve
Repair or replace the faulty
component.
There is a ruptured membrane or no air pre-
charge in the pressure tank.
See the relevant instruc-
tions in the pressure tank
manual.
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
are worn.
Contact the Sales and Service Department.
There are foreign
objects inside the
pump.
Contact the Sales and Service Department.
For any other situation, refer to the Sales and Service Department.
en - Translation of the original instructions
16 e-SV - English