Lowara e-SV 1SV34FH022T [20/280] The pump starts up too frequently

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