salmson MV 2000 Instalacion Y Puesta En Servicio página 9

ENGLISH
Lubrication of bearings
Depending on the type of motor:
- either the bearings are greased for life;
- or the motor has grease fittings.
In the latter case, grease them moderately every 500 hours
with SKF 328 or similar grease. Also grease the pump shaft
bearing.
The mechanical seal needs no maintenance. It must never be
operated dry, even momentarily.
8 . OPERATING TROUBLE
ATTENTION !
Switch the pumps OFF before doing any work on them.
TROUBLES
8.1 NO DELIVERY FROM a) Internal units obstructed by foreign
PUMP bodies:
b) Pipe obstructed at suction:
c) Intake of air at suction:
d) Pump is no longer primed:
e) Suction pressure too low (cavitation),
generally accompanied by noise:
f) Pump turns the wrong way:
g) Supply voltage to motor too low:
8.2 THE PUMP VIBRATES a) Loose on base:
b) Base inadequate:
c) Foreign bodies in moving element:
8.3 THE MOTOR OVERHEATS a) Hard to turn:
b) Voltage too low:
c) Foreign bodies in pump:
d) Ambient temperature > 40°C:
e) Bad connection:
8.4 THE PUMP FAILS TO a) Wrong size of pump chosen:
DELIVER ADEQUATE
b) Motor fails to turn at correct speed
PRESSURE
(foreign bodies, incorrect power
supply, poor axial adjustment of
motor):
c) The motor has burned out:
d) Poor filling:
e) Pump turns wrong way:
8.5 THE MOTOR TRIPS OUT a) The relay setting is wrong (too low):
b) The voltage is too low:
c) One phase is open-circuit:
d) The thermal relay is defective:
e) Hard to turn:
8.6 THE FLOW IS NOT a) The suction head of the pump has not
REGULAR been heeded:
b) The suction pipe is smaller in diameter
than the suction port:
c) The suction pipe and the strainer are
partially obstructed:
CAUSES
a) Dismantle the pump and clean it.
b) Clean the pipe.
c) Check tightness.
d) Re-prime it.
e) Losses of head on suction excessive, or suction head too great.
f) Reverse the direction of rotation by interchanging two wires on the motor terminal
block.
g) Check that the conductors of the cable are large enough. Measure the voltage on
the terminals.
a) Retighten it.
b) Reinforce the base.
c) Dismantle and clean.
a) Check that it can be turned by hand.
b) Check the voltage on the terminals; it must not differ by more than ± 5% from the
nominal voltage.
c) Dismantle and clean the pump.
d) The motor is designed to operate up to 115°C.
e) Check the connection.
a) Replace the pump.
b) Remove the pump and correct what is wrong.
c) Replace it.
d) Bleed.
e) Reverse the direction of rotation by interchanging two wires on the motor terminal
block.
a) Check the current with an ammeter, or set to the value marked on the motor data
plate.
b) Check the sections of the conductors of the cable.
c) Check it; replace the cable if necessary.
d) Replace it.
e) Check that it can be turned by hand.
a) Reread the installation conditions and recommendations.
b) Reread the installation conditions and recommendations.
c) Dismantle and clean.
9
REMEDIES