salmson SHC 2 kW Instrucciones De Instalación página 9

ENGLISH
8 . OPERATING TROUBLE :
Switch the pump OFF before doing any work on it
TROUBLES
a) The internal parts are obstructed by
8.1 PUMP TURNS BUT NO
foreign bodies :
DELIVERY
b) Suction pipe obstructed :
c) Air leaks in via suction pipe :
d) The pump has lost its priming :
e) The suction pressure is too low; this is
generally accompanied by cavitation
noise :
f) The pump turns the wrong way (three-
phase motor) :
g) The supply voltage to the motor is too
low :
h) The strainer is not under water :
a) Loose on its foundation :
8.2 THE PUMP VIBRATES
b) Foreign bodies obstructing the pump :
c) Pump is hard to turn :
d) Incorrect electrical connection :
a) Voltage too low :
8.3 THE PUMP OVERHEATS
b) Foreign bodies obstructing the pump :
c) Ambient temperature above +50°C :
8.4 THE MOTOR FAILS TO a) No power :
RUN
b) Turbine stalled :
c) Temperature probe tripped out :
a) The motor fails to run at its normal
8.5 THE PUMP DELIVERS
speed (foreign bodies, defective power
INSUFFICIENT PRESSURE
supply, etc.) :
b) The motor is faulty :
c) Pump poorly filled :
d) The motor turns the wrong way (three-
phase motor) :
e) Wear of the internal parts :
a) The setting of the thermal relay is too
8.6 THE MOTOR TRIPS OUT
low (three-phase motor) :
b) The voltage is too low :
c) One phase is open-circuit :
d) The thermal relay of the circuit-breaker
is faulty :
e) The motor is faulty :
a) The suction height (HA) is exceeded :
8.7 THE FLOW IS IRREGULAR
b) The diameter of the suction pipe is
smaller than that of the pump :
c) The strainer and suction pipe are
partially obstructed :
CAUSES
a) Dismantle the pump and clean it.
b) Clean all the pipes.
c) Check the tightness of the whole pipe, up to the pump, and make it tight.
d) Fill the pump to re-prime. Check that the foot valve is tight.
e) Loss of head on suction or suction height too great (check the NPSH of the pump
installed).
f) nterchange two phase wires on the motor terminal block or circuit-breaker to reverse
the direction of rotation.
g) Check the voltage on the terminals of the motor and the cross-sections of the
conductors.
h) Submerge the strainer (at least 20 cm) ; If necessary, ballast the hose.
a) Check the nuts of the stud bolts and tighten them fully.
b) Dismantle the pump and clean it.
c) Check that the pump turns freely without abnormal sticking.
d) Check the connections to the pump.
a) Check the voltage on the terminals of the motor; it should be within ± 10 % of the
rated voltage.
b) Dismantle the pump and clean it.
c) The motor is designed to operate at an ambient temperature of not more than +50°C.
a) Check the power supply.
b) Clean the pump.
c) Let the motor cool.
a) Dismantle the pump and correct the problem.
b) Replace it
c) Fill the pump and bleed until there are no more air bubbles.
d) Interchange two phase wires on the motor terminal block or on the circuit-breaker to
reverse the direction of rotation.
e) Replace it.
a) Check the current with an ammeter, or set to the current rating marked on the motor
data plate.
b) Check that the conductor cross-sections of the power cable are adequate.
c) Check it and, if necessary, replace the power cable.
d) Replace it.
e) Replace it.
a) Reread the installation conditions and recommendations in this data sheet.
b) The suction pipe must have the same diameter as the pump suction port.
c) Remove and clean.
9
REMEDIES