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MP48-R | 1.00.00
35
17 TROUBLE
SHOOTING
Danger
Extreme danger from electrical shock!
Disconnect the pump power supply before working on the pump.
Make sure the pump is de-energized and secure.
Problem/Indication Possible
cause
Check/Action
Pump does not trans-
fer
Thermal switch or triggering
device for PTC sensors of the
motor has operated following
to over-heating.
Disconnect
pump
from
mains.
Allow pump to cool.
Trace cause of over-heating and elimi-
nate it.
No voltage in power source.
Check room fuse and switch on if neces-
sary.
Connections or lines are
blocked.
Check connections and lines.
Remove
blockage.
External valve is closed or filter
is clogged.
Check external valves and filters.
Condensate has collected in
pump head.
Flush pump (see chapter 16.2).
Install pump at highest point in system.
Diaphragm or valve
plates/sealings are worn out.
Replace diaphragm and valve
plates/sealings (see chapter 16.3).
Flow rate, pressure
or vacuum too low
Condensate has collected in
pump head.
Flush pump (see chapter 16.2).
Install pump at highest point in system.
There is gauge pressure on
pressure side and at the same
time vacuum or a pressure
above atmospheric pressure
on suction side.
Change the pressure conditions.
Pneumatic lines or connection
parts have an insufficient cross
section or are throttled.
Disconnect pump from system to deter-
mine output values. Eliminate throttling
(e.g. valve) if necessary.
Use lines or connection parts with larger
cross section if necessary.
Leaks occur on connections,
lines or pump head.
Eliminate
leaks.
Connections or lines com-
pletely or partially jammed.
Check connections and lines.
Remove
the
jamming parts and particles.
Head parts are soiled.
Clean head components.
Diaphragm or valve
plates/sealings are worn.
Replace diaphragm and valve
plates/sealings (see chapter 16.3).
