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Malfunctions: Causes and elimination
8
Malfunctions: Causes and elimination
DANGER
Risk of injury!
If malfunctions are disregarded and/or removed only insufficiently, serious to
lethal injuries can occur.
Ø
Never put the vacuum pump in operation again after it has been switched off
automatically without unequivocally finding out the reason for this shut-off
and remedying it.
8.1 Table of malfunctions
Malfunction
Cause
Elimination
Note
The machine is
switched off by the
motor protection
switch
Mains voltage / Frequency
does not correspond with the
motor data
Check by qualified electrician
Chapter 5.5
Connection to motor terminal
board is not correct
Motor protection switch is not
set correctly
Motor protection switch is trig-
gered too quickly
Use a motor protection switch
with an overload-dependent
turn-off delay that consid-
ers the short excess current
at start up (version with short
circuit and overload trigger
as per VDE 0660 Part 102 or
IEC 60947-4-1)
Pump does not start
The Emergency Stop
push-button has been
actuated
Unlock the Emergency Stop
button
Release switch not switched
on
Switch on release switch
Malfunction of the frequency
converter
Check the status LED on the
frequency converter. If neces-
sary, disconnect the converter
from the power supply for 30 s
Operating instruc-
tions of the fre-
quency converter
Pressure below setpoint value Wait until pressure has
reached the minimum pressure
and restarts automatically. If
necessary, ventilate system.
Suction capacity is
insufficient
The micro filter is dirty
Clean / replace the micro filter Chapter 7.2.2
Chapter 7.4
The inlet pipe is too long or too
narrow
Check the hose and/or the
pipe
Chapter 5.3
Machine or system leaking
Check the pipework and screw
connections for leaks and
check for tight fit
Chapter 7.2
Pressure sensor wrongly
scaled
Re-scale pressure sensor
Elmo Rietschle
Service
Prematic AG, Märwilerstrasse 43, 9556 Affeltrangen www.prematic.ch
Tel. 071 918 60 60, Mail: [email protected]
