Elmo Rietschle V-VGD 11 Originalbetriebsanleitung Seite 56

Malfunctions: Causes and elimination
8 Malfunctions: Causes and elimination
Fault
Machine is switched
off by the motor pro-
tection switch
Suction capacity is
insufficient
Final pressure (max.
vacuum) is not
reached
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Cause
Mains voltage/ Frequency
does not correspond with the
motor data
Connection to motor terminal
board is not correct
Motor protection switch is not
set correctly
Motor protection switch is
triggered too quickly
Vacuum pump or its oil is too
cold
The lubricating oil is too vis-
cous
The oil separator element is
dirty.
The back pressure is too high
when the exhaust air is being
discharged.
The suction pipe is too long or
too narrow
Leak on the suction side of
the vacuum pump or in the
system
The intake filter is dirty
Leak on the suction side of
the vacuum pump or in the
system
Incorrect oil viscosity
Troubleshooting
Check by qualified electrician
Use a motor protection switch
with an overload-dependent
delayed switch off that takes
into consideration the short
term excess current at start
up (version with short circuit
and overload trigger as per
IEC 60947-4-1 or VDE 0660
Part 102)
Note the ambient temperature
and the intake temperature
The oil viscosity must comply
with ISO VG 32 or 46 as per
DIN ISO 3448
Change the oil separator ele-
ment
Check the hose or the pipe
Check the hose or the pipe
Check the pipework and
screw connections for leaks
and to ensure that they are
firmly seated.
Clean or replace the intake
filter
Check the pipework and
screw connections for leaks
and to ensure that they are
firmly seated.
The oil viscosity must comply
with ISO VG 32 or 46 as per
DIN ISO 3448
Tel. 071 918 60 60, Mail: v-g@prematic.ch
Important
Section 5.5
Section 2.3
Section 7.2.2
Section 7.2.3
Section 5.3
Section 5.3
Section 7.2
Section 7.2.1
Section 7.2
Section 7.2.2