Elmo Rietschle L-BV3 User Manual
Page 27
Servicing
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Fault
Cause
Remedy
Carried out by
Winding short-
circuit.
Have winding checked.
Electrician
Motor
overloaded.
Check operating-liquid flow rate and reduce if
necessary.
See Chapter 7.2, "Self-priming operation", Pg. 17
or 7.3, "Operation with operating-liquid feed",
Pg. 18.
Operator
Counter-pressure
at discharge
connection too
high.
Reduce counter-pressure.
Operator
Share of liquid
also fed too high.
Reduce share of liquid also fed.
Operator
Protective
motor switch
trips when
motor is
switched on.
Impeller is
jammed.
See "Motor does not start, humming noises."
Operator/Service
Decalcify vacuum pump/compressor.
See Chapter 10.1, "Maintenance", Pg. 24.
Operator
Power
consumption
too high.
Lime or other
deposits.
Clean vacuum pump/compressor.
See Chapter 10.1, "Maintenance", Pg. 24.
Operator
No operating
liquid present.
Ensure proper operating-liquid flow rate.
See Chapter 7.2, "Self-priming operation", Pg. 17
or Chapter 7.3, "Operation with operating-liquid
feed", Pg. 18.
Operator
Severe leak in the
system.
Seal leak in the system.
Operator
Unit does not
generate
vacuum.
Wrong direction
of rotation.
Reverse direction of rotation by interchanging two
connecting leads.
Electrician
Unit too small.
Use larger unit.
Operator
Operating-liquid
flow too low.
Increase operating-liquid flow rate to up to 2x the
nominal flow rate.
See Chapter 7.2, "Self-priming operation", Pg. 17
or Chapter 7.3, "Operation with operating-liquid
feed", Pg. 18.
Operator
Operating liquid
too warm
(nominal
temperature:
15°C [59 °F]).
Cool or increase operating-liquid flow,
See Chapter 7.2, "Self-priming operation", Pg. 17
or 7.3, "Operation with operating-liquid feed",
Pg. 18.
Operator
Inspect impeller. Replace impeller if necessary.
Service
Erosion.
Replace affected components.
Service
Leak in system.
Seal leak in the system.
Operator
Unit
generates
insufficient
vacuum.
Mechanical seal
leaky.
Replace mechanical seal.
Service
Screeching
noises.
Cavitation of
vacuum
pump/compressor
.
Connect cavitation-protection hose of liquid
separator or clean cavitation-protection
equipment.
Operator