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© Gardner Denver Schopfheim GmbH, Gardner Denver Deutschland GmbH
Malfunctions: Causes and elimination
Fault
Cause
Troubleshooting
Important
Machine is switched
off by the motor pro-
tection switch
Mains voltage/ Frequency
does not correspond with the
motor data
Check by qualified electrician
Section 5.5
Connection to motor terminal
board is not correct
Motor protection switch is not
set correctly
Motor protection switch is
triggered too quickly
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
VDE 0660 Part 2 orIEC 947-4)
Suction capacity is
insufficient
The mesh filter is dirty
Clean or replace the filter
Section 7.2.2
Section 7.4
The suction pipe is too long or
too narrow
Check the hose or the pipe
Section 5.3
Machine or system leaking
Check the pipework and
screw connections for leaks
and to ensure that they are
firmly seated.
Section 7.2
Final pressure (max.
vacuum) is not
reached
Machine or system leaking
Check the pipework and
screw connections for leaks
and to ensure that they are
firmly seated.
Section 7.2
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 machine makes
an abnormal noise
Deposits on the rotary piston
Clean the working space and
the rotary piston
Elmo Rietschle
Service
Please contact Elmo Rietschle Service for other malfunctions or those that cannot be eliminated.
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Malfunctions: Causes and elimination
