salmson ALTI-HU VARIO Series, Инструкции по установке и запуску

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18
English
10. Faults, causes and remedies
Faults Causes Remedies
One or two pumps fail to prime Air leak at suction Check tightness of all suction pipe con-
nections.
Check if the tank suction strainer is
covered with water
Foot-valve strainer not tight or obstruc-
ted Check tightness of the valve, replace it if
necessary
Large losses of head at suction Calculate the losses of head and make
sure they are compatible with the pump
NSPH
Public water pressure too low or zero If it recurs, it is recommended to use a tank
Suction head too high Be sure that the minimum water level of
the tank is compatible with the NPSH of
the pumps
Suction piping obstructed or valve on
suction manifold closed Check valve opening and clean the
piping if necessary
One pump fails to run Thermal relay tripped The pump "fault" indicator on the control
box must be lit. Check the setting of the
current
Magnetic circuit breaker tripped Switch it again. If tripping recurs, check
the output current of the motor concer-
ned. If this current is much higher than
the one mentioned on the motor type
plate, the circuit breaker is defective and
shall be replaced
Pump shaft blocked Switch off the electric supply of the con-
trol box and then check the shaft turns
freely. If it is blocked, dismantle the
pump
Winding fault Disconnect the terminal block of the
motor concerned. Check the network at
the terminals and the stator insulation.
Replace the motor if necessary
No delivery pressure Flow higher than booster capabilities Plan to replace the booster by a more
adequate one (do not forget to contact
us in any case)
One or two pumps not primed Check that the suction strainer does not
let air in or the tank filling point is too
close from the strainer
Public water pressure lower than the
minimum pressure planned Contact the public water supply compa-
ny or replace the booster.
Contact us
Pumps turn in the reserve direction Cross 2 supply wires at the motor termi-
nal blocks
A pump is obstructed by particles Have the pump dismantled and cleaned
Contactor tripping too frequent, starting
frequency too high Required pressure wrong set Reset it
Installation capacity too low Add a tank
No air inside the tank Pressurize the tank or replace the bladder
Tripping frequency of dry running safety
too high Setting of dry running pressure switch-
too high Set the pressure switch correctly
Drop of the public water supply pressure
when starting the pumps Set the dry running pressure switch to
the minimum value. If it recurs, the
public water mains is inadequate, check
the pressure with the pressure gauge
when starting the pumps or contact the
public water mains service
Operating automatism device defective Wires disconnected Check all connections to the terminal
block of the control box
POMPES SALMSON SAS 04/2013