Elmo Rietschle S-VSI 301, Operating Instructions Manual, Page: 80 / 84

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Malfunctions: Causes and elimination
8 Malfunctions: Causes and elimination
Malfunction Cause Elimination Note
Machine is switched
off by the motor pro-
tection switch Mains voltage/ Frequency
does not correspond with the
motor data Check by qualified electrician Chapter 5.6
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 considers the short
excess current at start up (version
with short circuit and overload trig-
ger as per VDE 0660 Part 102 or
IEC 60947-4-1)
Suction capacity is
insufficient The mesh filter is plugged Clean / replace the mesh 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
Final pressure (max.
vacuum) is not
reached Machine or system leaking Check the pipework and screw
connections for leaks and check
for tight fit Chapter 7.2
Not enough cooling water Observe cooling water
consumption Chapter 9
Cooling water pressure too low Refill cooling water Chapter 7.2.3
The mesh filter is plugged Clean / replace the mesh filter Chapter 7.2.2
Chapter 7.4
Machine gets too hot Ambient or inlet temperatures
too high
Ensure proper use Chapter 2.3
Cooling air supply is
obstructed Check ambient conditions Chapter 5.1
Clean the cooling ribs Chapter 7.2.3
The cooling water system is
obstructed Check the cooling water system
and the inlet pipes Chapter 7.2
Not enough cooling water Observe cooling water
consumption Chapter 9
Cooling water pressure too low Refill cooling water Chapter 7.2.3
Cooling water inflow is too hot Observe the max. inlet temperature Chapter 9
The machine makes
a strange noise Deposits on the rotors Clean the working space and the
rotors Elmo Rietschle
Service
Please contact Elmo Rietschle Service for other malfunctions or those that cannot be eliminated.
Prematic AG, Märwilerstrasse 43, 9556 Affeltrangen www.prematic.ch Tel. 071 918 60 60, Mail: v-g@prematic.ch