Elmo Rietschle L-BV7 - Manual (Page 39)

© Gardner Denver Deutschland GmbH 39 / 64 610.48060.40.000
Servicing
11.2 Repairs/troubleshooting
Fault Cause Remedy Carried out by
Motor does
not start,
no motor
noise. At least two
power supply
leads interrupted. Check fuses, terminals and cables for open
circuit. Eliminate open circuit. Electrician
One power
supply lead
interrupted. Check fuses, terminals and cables for open
circuit. Eliminate open circuit. Electrician
Free shaft by turning.
See Chapter 11.1, "Maintenance", Pg. 36. Operator
Decalcify vacuum pump/compressor.
See Chapter 11.1, "Maintenance", Pg. 36. Operator
Drain and clean vacuum pump/compressor if
necessary.
See Chapter 11.1, "Maintenance", Pg. 36. Operator
Impeller is
jammed.
Check and correct impeller gap setting if
necessary. Service
Impeller
defective. Replace impeller. Service
Motor does
not start,
humming
noise..
Motor bearings
defective. Replace motor bearings. Service
Winding short-
circuit. Have winding checked. Electrician
Motor
overloaded. Throttle operating-liquid flow rate.
See Chapter 8.2, "Self-priming operation", Pg. 30
or 8.3, "Operation with operating-liquid feed",
Pg. 31. 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 noise." Service
Decalcify vacuum pump/compressor.
See Chapter 11.1, "Maintenance", Pg. 36. Operator Power
consumption
too high. Lime or other
deposits.
Clean vacuum pump/compressor.
See Chapter 11.1, "Maintenance", Pg. 36. Operator
No operating
liquid. Ensure proper operating-liquid flow rate.
See Chapter 8.2, "Self-priming operation", Pg. 30
or Chapter 8.3, "Operation with operating-liquid
feed", Pg. 31. 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