English (GB)
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9. Fault finding
10. Disposal
This product and all its associated parts must be disposed of in
an environmentally friendly manner. Use appropriate waste
collection services. If this is not possible, contact the nearest
Grundfos company or service workshop.
Fault
Cause
Remedy
1. Maximum dosing flow is not
reached.
a) Insufficient injector vacuum.
Check the injector. Repair it, if necessary.
Observe the manual of the injector.
Check the motive water pump. Repair it, if
necessary.
Check the dirt trap before the injector. Clean it,
if necessary.
b) Leakage in the vacuum line between dosing
regulator and injector.
Eliminate the leakage.
c) Vacuum line between dosing regulator and
injector too long.
For details on vacuum lines, see section
5.1.2 Vacuum lines between dosing regulator
and injector
.
d) Soiled vacuum line.
Replace the vacuum line.
e) Servomotor does not reach maximum dosing
capacity.
Readjust the servomotor and/or the external
controller.
f)
Soiled filter at the pressure connection of the
dosing regulator.
Call the service.
g) Closed chlorine container valve.
Open the chlorine container valve.
h) Empty chlorine container.
Replace empty chlorine container by a full one.
i)
Adjusting spindle of the dosing regulator not
suitable (diameter too small).
Call the service.
2. Leaky pressure connection.
a) Gasket at the pressure connection damaged. Replace the gasket.
b) Sealing surfaces soiled with residues of old
gaskets.
Clean the sealing surfaces.
c) Sealing surface at the chlorine container
damaged.
Use another chlorine container.
d) Pressure connection loose.
Tighten the pressure connection.
e) Sealing surface at the pressure connection
of the vacuum regulator damaged.
Call the service.
3. Gas escapes at the
overpressure line.
a) Re-liquefied gas gets into the inlet valve.
Reduce the extraction amount, ensure a
correct temperature sequence.
b) Inlet valve soiled or damaged.
Call the service.
4. Despite correctly displayed
dosing capacity, the desired
chlorine solution concentration
is not reached.
a) Leakage in the vacuum line between vacuum
regulator and dosing regulator.
Eliminate the leakage.
5. The ball in the measuring glass
is caught.
a) Measuring glass or ball soiled.
Call the service.
6. Formation of ice on the chlorine
container.
a) Extraction quantity is set too high. If more
than 1 % of the content is extracted per hour,
there is danger of formation of ice at the
container.
Use a dosing system with several chlorine
containers.
Call the service.
b) Chlorine gas dosing system too small.
Use a bigger chlorine gas dosing system.
7. Water in the measuring glass.
a) Diaphragm non-return valve is defective.
Call the service.
8. Servomotor does not run.
a) Servomotor is switched to manual operation. Switch servomotor to automatic operation.
9. Servomotor does not regulate
within the entire capacity range.
a) Servomotor and/or controller adjusted
incorrectly.
Call the service.
10. Servomotor rotates in the wrong
direction.
11. Vacuum varies despite constant
operating conditions.
a) Spring in the differential pressure regulator
soiled or damaged.
12. The dosing capacity varies
despite constant operating
conditions.
a) Diaphragm in the differential pressure
regulator soiled or damaged.
Summary of Contents for Vaccuperm VGA-111
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