Elmo Rietschle L-BV5 Operating instructions - Manual (Page 28)

Maintenance
610.44440.40.000 28 / 32 © Gardner Denver Deutschland GmbH
Fault Cause Correction Remedy
Excessive backpres-
sure in the discharge
connection  Reduce the backpressure. Operator
Proportion of liquid
entrained in the main
flow is too high  Reduce the proportion of liquid. Operator
Impeller does not ro-
tate freely See "Impeller does not rotate freely", page 27
See "Decalcifying the unit", page 26. Operator Power con-
sumption
too high Build up of lime-scale
or
contamination
See "Flushing the pump casing", page 26. Operator
No operating-liquid
supply When operating with supply of the operating-liquid:
 Check and correct the operating-liquid flow-rate. (see
chapter 7.4, "Checking and correcting the operating-
liquid flow-rate, page 22).
When operating with self-suction of the operating-liquid:
 See 7.3, "Operation with self-suction of the operating-
liquid", page 22.
 Clean out the operating-liquid supply hose.
 Increase the diameter of the operating-liquid supply
hose.
Operator
Large-scale leak in the
system.  Seal off leaks in the system. Operator
Unit does
not generate
a vacuum
Incorrect direction of
rotation  Change the direction of rotation by switching polarity
between two of the electrical power supply phases.
Electrician
Insufficient operating-
liquid See "No operating-liquid supply", page 28. Operator
Operating-liquid too
warm  cool the operating-liquid or increase the flow-rate (see
chapter 7.4, "Checking and correcting the operating-
liquid flow-rate", page 22).
(nominal temperature: 15°C [59 °F]).
Operator
Erosion / Corrosion  Inspection of the casing, the impeller and the control
disk.
 Renew the affected components.
Service
Leakage in the system  Repair leakage in the system. Operator
Rotary seal leaking  Replace rotary seal. Service
Motor connection in-
correct  Check and repair motor connection. Electrician
Electrical power sup-
ply incorrect  Check and repair electrical power supply. Electrician
System
generates
too little
vacuum
Unit is too small  Install a larger unit. Operator
Cavitation in the unit 2BV2 … and 2BV5 1..
 Connect separator
cavitation-protection
hose (ancillary) or
clean out cavitation-
protection system.
2BV5 4..
 Check that the pressure set-
ting is in accordance with the
permitted operating pressure.
Operator Squealing
noises
Operating-liquid flow-
rate too high  Check the operating-liquid flow-rate and if necessary
reduce it (see chapter 7.4, "Checking and correcting
the operating-liquid flow-rate", page 22).
Operator
Leakage in
the unit Defective seals  Check the seals. Service