Elmo Rietschle V-VGD 10/15 - Manual (Page 27)

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Malfunctions: Causes and elimination
Fault Cause Troubleshooting Important
Final pressure (max.
vacuum) is not
reached Leak on the suction side of
the vacuum pump or in the
system Check the pipework and
screw connections for leaks
and to ensure that they are
fi rmly seated. Section 7.2
Incorrect oil viscosity The oil viscosity must comply
with ISO VG 46 as per DIN
51519 Section 7.2.2
The adjustment bolt (X) is not
set correctly. Set the operating range cor-
rectly. Section 6.1.2
Machine gets too hot Ambient or intake temperature
is too high Ensure it is being used prop-
erly Section 2.3
Cooling air supply is ob-
structed Check environmental condi-
tions Section 5.1
Clean ventilation slots Section 7.2
The lubricating oil is too vis-
cous The oil viscosity must comply
with ISO VG 46 as per DIN
51519 Section 7.2.2
The oil separator element is
dirty. Change the oil separator ele-
ment Section 7.2.3
The back pressure is too high
when the exhaust air is being
discharged. Check the hose or the pipe Section 5.3
Exhaust air contains
visible oil mist The oil separator element is
not inserted correctly or the O
ring is missing Check that it is correctly
seated Section 7.2.3
Unsuitable oil is being used Use suitable types Section 7.2.2
The oil separator element is
dirty. Change the oil separator ele-
ment Section 7.2.3
The back pressure is too high
when the exhaust air is being
discharged. Check the hose or the pipe Section 5.3
Ambient or intake temperature
is too high Ensure it is being used prop-
erly Section 2.3
Cooling air supply is ob-
structed Check environmental condi-
tions Section 5.1
Clean ventilation slots Section 7.2