Elmo Rietschle S-VSI 300(44) - Manual (Page 32)

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Malfunctions: Causes and elimination
Fault Cause Troubleshooting Important
Pump is switched
off by the motor
protection switch Power Supply/ Frequency
does not correspond with the
motor data Check by qualified electrician Section 5.5
Connection to motor leads 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
Pumping capacity is
insufficient The mesh filter is dirty Clean or replace the mesh
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
Pump or system vacuum
leaks Check the pipe work and
screw connections for leaks
and to ensure that they are
firmly seated Section 7.2
8 Malfunctions: Causes and elimination