Xylem LOWARA ESHS ATEX, Инструкция по установке, эксплуатации и обслуживанию

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en – Original instructions
26
7.6 The pump unit starts, but the
system's general protection is
activated
Cause Solution
A short circuit in the
electrical system. Check the electrical
system.
7.7 The pump unit starts, but the
system's residual current device
(RCD) is activated
Cause Solution
There is an ground
(earth) leakage. Check the insulation of the
electrical system components.
7.8 The pump runs but delivers too
little or no liquid
Cause Solution
There is air
inside the pump
or the piping. Bleed the system.
The pump is not
correctly
primed. Stop the pump and repeat the
prime procedure.
If the problem continues:
•
Check the suction pipe
for perfect tightness.
•
Replace any valves that
are leaking.
The throttling on
the delivery side
is too extensive. Open the valve.
The rotation
direction of the
impeller is
wrong . Change the position of two of
the phases on the terminal
board of the motor or in the
electric control panel.
7.9 The pump unit stops, and then
rotates in the wrong direction
Cause Solution
There is a leakage in one or
both of the following
components:
•
The suction pipe
•
The foot valve or the
check valve
Repair or replace
the faulty
component.
7.10 The pump starts up too
frequently
Cause Solution
There is a leakage in one
or both of the following
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
instructions in the
pressure tank
manual.
7.11 The pump vibrates and
generates too much noise
Cause Solution
Pump
cavitation. Reduce the required flow rate by
partially closing the on-off valve
downstream from the pump. If the
problem persists check the
operating conditions of the pump
(for example height difference, flow
resistance, liquid temperature).
There are
foreign
objects
inside the
pump. Contact Xylem or the Authorised
Distributor.
Contact Xylem or the Authorised Distributor with
regard to any situation not covered here.