salmson HYDROBAT HPBS Serie Installation Et Mise En Service page 11

ENGLISH
8 . OPERATING TROUBLES
Switch the pumps OFF before doing any work on it.
TROUBLES
8.1 ONE OR BOTH PUMP a) Suction air leak:
NOT PRIMED
b) Check-valve strainer (version «B») not
c) Large losses of head at suction:
d) Town water pressure too low or non-
e) Suction head too great (version «B»):
f) Suction pipe obstructed or valve on
g) The pumps turn the wrong way:
8.2 ONE PUMP FAILS TO a) The pump «Fault» light on the control
OPERATE
b) Fuses faulty or blown:
c) Pump shaft jammed:
d) Winding fault:
e) Contactor coll burned out:
8.3 INADEQUATE a) Loss of priming of one or both pumps:
DISCHARGE PRESSURE
b) Town water pressure less than
c) The pumps turn the wrong way:
d) One pump is obstructed by foreign
e) Supply voltage to motors too low:
8.4 FREQUENT ACTUATION a) Pump control pressure switch out of
OF RELAYS, FREQUENT
STARTING OF PUMPS b) capacity of installation to small:
c) No air in tank:
d) Tank bladder pierced:
8.5 FREQUENT ACTUATION a) Dry-running pressure switch setting
OF DRY-RUNNING
SAFETY
b) Town water pressure drops when
8.6 FAILURE OF AUTOMATIC a) Fuses blown:
OPERATION b) Pressure switches faulty:
c) Wires disconnected:
d) Flow Switch faulty:
8.7 DISCHARGE CHECK a) Valve diaphragm damaged:
VALVE NO TIGHT
8.8 NO STOP OF PUMP a) Flow switch in wrong way:
CAUSE
tight, or obstructed:
existent:
suction port closed:
box should be lit:
anticipated minimum pressure:
bodies:
adjustment:
too high:
pumps start:
a) Check the tightness of all unions of the suction pipe.
Check that the suction strainer (version «B') is in fact under water.
b) Check the tightness of the valve; replace if necessary.
c) Calculate the losses of head and make sure that they are compatible with NPSH of
the pumps.
d) If this recurs, a tank will be needed.
e) Make sure that the minimum level in the tank is compatible with NPSH of the pumps.
f) Check that the valve is open; clean the pipe if necessary.
g) Interchange two wires on the motor terminal block.
a) Check the adjustment of the thermal relay and reset it by pressing the red push-
button.
b) Replace them (check the rating). If the trouble persists, check the current draw of
the motor concerned. If it is much higher than the current rating marked on the
motor data plate, the motr is faulty an must be replaced.
c) Cut off power on the control box, then check that the shaft turns freely. If it is
jammed, remove the pump.
d) Disconnect the terminal block of the motor concerned and check line power on the
terminals and the insulation of the stator; if necessary, replace the motor.
e) Replace it.
a) Check that the suction strainer (version «B') is not taking in air, and that the level in
the tank is not too close to the strainer.
b) Get in touch with your water board or replace the module (get in touch with us).
c) Interchange two wires on the motor terminal block.
d) Have the pump dismantled and cleaned.
e) Measure the voltage on the terminals of the motors.
a) Check the adjustment; the difference betwen the high and low pressures must be
greater than 0.1 bar.
b) Add a tank.
c) Pressurise the tank or replace the bladder.
d) Replace the tank bladder.
a) Correct the pressure switch setting.
b) Adjust the dry-running to the mini. If this recurs, the town's water network is insufficient.
Check the pressure during starting of pump. (or consult the water supplier).
a) Change them.
b) Check the contacts; if necessary, replace the pressure switch concerned.
c) Check all the connections to the terminal blocks of the control box.
d) Check the flow switch trigering on and off, replace it if necessary.
a) Replace the valves.
a) Check that arrow on flow switch is in accordance with flow.
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REMEDIES