Manual

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Malfunctions: Causes and elimination
8 Malfunctions: Causes and elimination
Fault Cause Troubleshooting Important
Machine is
switched off
by the motor
protection
switch
Mains voltage/ Frequency
does not correspond with the
motor data
Check by qualifi ed electrician Section 5.5
Check all electrical connec-
tions
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 over-
load trigger as per VDE 0660 Part 2
orIEC 947-4)
Blower operates without con-
nection to a system
Connect system Section 5.3
Insuffi cient
suction ca-
pacity
Filter insert is full Empty fi lter insert Section 7.2.1
Suction pipe is too long or too
narrow
Check the the suction pipe Section 5.3
Machine or system leaking Check the pipework and screw con-
nections for leaks and to ensure that
they are fi rmly seated
Section 7.2
Machine gets
too hot
Ambient or intake temperature
is too high
Ensure it is being used properly Section 2.3
Blower sucks too little air Check the rotation direction resp. cross
sections of the pipes
Section 6.1.1
Section 5.3
Filter insert is full Empty fi lter insert Section 7.2.1
Please contact Elmo Rietschle Service for other malfunctions or those that cannot be eliminated.