Elmo Rietschle V-VGD 11 Originalbetriebsanleitung Seite 58

Malfunctions: Causes and elimination
Fault
The machine makes a
abnormal noise
(The blades making
a hammering noise
when starting from
cold is normal if it
disappears within two
minutes as the op-
erating temperature
increases)
Water in lubricating oil
Please contact Elmo Rietschle Service for other malfunctions or those that cannot be eliminated.
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Cause
The pump housing is worn
(chatter marks)
Blades are damaged
Vacuum pump or its oil is too
cold
The lubricating oil is too vis-
cous
Pump sucks in water
The pump sucks in more wa-
ter vapour than is suitable for
its water vapour compatibility
Pump only works for a short
time and therefore does not
reach its normal operating
temperature
Troubleshooting
Repair by manufacturer or
authorised workshop
Repair by manufacturer or
authorised workshop
Note the ambient temperature
and the intake temperature
The oil viscosity must comply
with ISO VG 32 or 46 as per
DIN ISO 3448
Install water interceptor up-
stream of the pump
Contact the manufacturer for
increased gas ballast
Let the pump continue to run
with a closed suction side
after extracting the water
vapour until the water has
evaporated from the oil
Tel. 071 918 60 60, Mail: v-g@prematic.ch
Important
Elmo Rietschle
Service
Elmo Rietschle
Service
Section 2.3
Section 7.2.2
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