Elmo Rietschle L-BV3 User Manual

Page 27

Servicing

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610.444430.40.000

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