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MP30 | 1.00.01
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16
TROUBLESHOOTING
Before carrying out any work on the pump, it must be safely isolated from the supply and
disconnection from the supply verified. The following instructions for troubleshooting are hierarchically
structured, i.e. to be used in the specified order.
Problem/Indication
Possible cause
Check/Remedy
Pump does not
transport
No system voltage available. Check system voltage. Check mains cable for
tightness.
Connections or pipes are
blocked.
Clear blockage.
An external valve is closed
or a filter is clogged.
Open valve or clean fouled/clogged filter.
Liquid (condensate) has
collected in the pump head.
Purge pump with inert gas for several minutes.
If there is no risk of explosion, air can also be
used for this purpose. Install pump at the
highest point in the system.
MP30:
Thermal safety cut-out has
operated due to overheating.
Disconnect pump from the supply, allow to cool
down and remedy cause of overheating.
Delivery capacity,
pressure or vacuum
too low
Diaphragms or valve plates
worn.
Replace worn parts (see 14. ff).
Problem/Indication
Possible cause
Check/Remedy
Initially compare reached
pump capacity with technical
data in chapter 1.2 or data
sheet.
Pump is not designed for this condition.
Liquid (condensate) has
collected in the pump head.
Purge pump with inert gas for several minutes.
If there is no risk of explosion, air can also be
used for this purpose. Install pump at the
highest point in the system.
Excess pressure is present
on the pressure side and on
the suction side
simultaneously a vacuum or
pressure above atmospheric
pressure.
Pump is not designed for this condition.
Pneumatic lines or
connecting parts have an
insufficient cross-section or
are restricted.
To measure capacity values, decouple pump
from the system; a pipe with insufficient cross-
section or, e.g. a valve installed in the system
can alter the measured value considerably.
Leaks at connections, pipes
or pump head.
Diaphragms or valve plates
are faulty or head parts are
fouled.
Steam leaks.
Tighten screwed connections.
Replace faulty parts.
Clean fouled parts or replace.
