Instruction 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
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 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 or
pressure ca-
pacity
Blower selected was too small If available use a bigger blower Data sheets
D 701 / D 702
Lines are too long or too nar-
row
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 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
Cooling air supply is obstruct-
ed
Check environmental conditions Section 5.1
Clean ventilation slots Section 7.2
Solenoid
valve does
not work
The incoming voltage and fre-
quency does not correspond
with the information on the
solenoid valve
Check the incoming voltage and fre-
quency
Section 5.4
Valve is contaminated Dismantle and clean Section 7.2
Please contact Elmo Rietschle Service for other malfunctions or those that cannot be eliminated.