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© Gardner Denver Schopfheim GmbH, Gardner Denver Deutschland GmbH
Malfunctions: Causes and elimination
8
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 termi-
nal 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 102 or
IEC/EN 60947-4-1)
Pumping ca-
pacity is insuf-
ficient
The intake filter is dirty
Clean or replace the intake filter
Section 7.2.1
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 con-
nections for leaks and to ensure that
they are firmly seated.
Section 7.2
Blades are damaged
Replace blades
Section 7.2.2
Section 7.4
Final pressure
(max. vacuum)
is not reached
Machine or system leaking
Check the pipework and screw con-
nections for leaks and to ensure that
they are firmly seated.
Section 7.2
Blades are worn or damaged
Replace blades
Section 7.2.2
Section 7.4
Machine gets
too hot
Ambient or intake tempera-
ture is too high
Ensure it is being used properly
Section 2.3
Cooling air supply is ob-
structed
Check environmental conditions
Section 5.1
Clean ventilation slots
Section 7.2
The machine
makes an ab-
normal noise
The compressor housing is
worn (chatter marks)
Repair by manufacturer or authorised
workshop
Elmo Rietschle
Service
The vacuum regulating valve
(if fitted) is vibrating
Replace the valve
Section 7.4
Blades are damaged
Replace blades
Section 7.2.2
Section 7.4
Please contact Elmo Rietschle Service for other malfunctions or those that cannot be eliminated.
Tel. 071 918 60 60, Fax 071 918 60 40
Mail: [email protected]
www.prematic.ch