Manual

28
| www.gd-elmorietschle.com © 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 qualifi ed 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)
The regulating valve is dirty so
that the permissible vacuum
value is exceeded
Clean or replace the regulat-
ing valve
Section
7.2Section 7.4
Pumping capacity is
insuffi cient
The suction fi lter is dirty Clean or replace the suction
fi lter
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
fi rmly seated.
Section 7.2
8 Malfunctions: Causes and elimination