Operating Trouble - salmson ALTI-V ELINOX-V 36 Manuel D'installation Et Mise En Service

ENGLISH

8. OPERATING TROUBLE

Before any action, POWER DOWN the module.
TROUBLE
8.1 One or two pumps
a) Air leak at suction.
fail to prime.
b) Foot valve-strainer (Version "B") not tight or
obstructed.
c) Large losses of head at suction.
d) Town water pressure too low or zero.
e) Suction height too large (version "B").
f) Suction piping obstructed or valve on suc-
tion pipe closed.
g) The pumps turn backwards.
8.2 One pump fails to
a) Thermal relay tripped.
run.
b) Magnetic circuit-breaker tripped.
c) Pump shaft stalled.
d) Coil of control relay burned out.
e) Magneto-thermal circuit-breaker tripped.
8.3 No discharge a) Flow requested greater than capabilities of
pressure. the module.
b) One or two pumps have lost water.
c) Town water pressure less than anticipated
minimum pressure.
d) The pumps turn backwards.
e) A pump is obstructed by foreign bodies.
f) The motors are supplied at too low a voltage.
a) Pump control pressure switch out of adjust-
8.4 Frequent hunting
ment.
of control relays,
b) Capacity of installation too small.
frequent starting of
the pumps. c) No air in bladder tank.
8.5 Frequent tripping a) Dry-running pressure switch set too high.
of the dry-running b) Drop of town water pressure when pumps
safety. start.
8.6 Defective automa- a) Fuses blown.
tion of operation. b) Wires disconnected.
c) Pressure switches defective.
d) Capillary obstructed :
e) Automat is "fault" :
• indicator "fault" flashes : small error
• indicator "fault" lighted : big error
8.7 Discharge check a) Diaphragm of check valve destroyed.
valve not tight.
CAUSE
a) Check the tightness of all suction piping connections.
Check if the suction strainer (Version "B") is correctly covered with water.
b) Check the tightness of the check valve; replace it if necessary.
c) Calculate the losses of head and make sure that they are compatible with the
NPSH of the pumps.
d) If the phenomenon recurs, it is important to go through a buffer tank.
e) Make sure that the minimum buffer tank level is compatible with the NPSH of the
pumps.
f) Check the opening of the valve and clean the piping if necessary.
g) Interchange two power supply wires on the motor terminal blocks.
a) The pump "fault" indicator on the box must be lighted. Check the adjustment of the
thermal relay and reset it by pressing in the blue button on it.
b) Mesurer la résistance d'isolement du moteur. en déconnectant les fils moteur et en
enlevant les barrettes. En cas de court-circuit, changer le moteur si nécessaire.
c) Cut off power to the box, then check that the shaft turns freely; if it is stalled, dis-
mantle the pump.
Disconnect the terminal block of the motor concerned and check the mains
power on the terminals and the stator insulation; replace the motor if necessary.
d) Replace it.
e) The pump "fault" indicator on the box must be lighted. Check the adjustment of the
thermal and reset it by pressing in the red button and black button on it.
a) Consider replacing the module by a more suitable one (get in touch with us in all
cases).
b) Check that the suction strainer (Version "B") does not let in air and that the tank
filling point is not too close to the strainer.
c) Get in touch with the Water Board or replace the module. Get in touch with us.
d) Interchange two power supply wires on the terminal blocks of the motors.
e) Have the pump dismantled and cleaned.
f) Check the voltage on the terminals of the motors.
a) Check the adjustment: the difference between the high and low pressures must be
greater than 0.1 bar.
b) Install an additional bladder tank.
c) Pressurize the tank or replace the bladder.
a) Adjust the pressure switch correctly.
b) Set the dry-running pressure switch to its minimum. If the phenomenon persists, the
town water network is inadequate; check the pressure on the pressure gauge
when the pumps start, or get in touch with the Water Board.
a) Replace it.
b) Check all connections to the terminal block of the box.
c) Check the contacts; replace the pressure switch concerned if necessary.
d) Clean the capillary.
e) Note the defect with the dashboard (optional).
• Remedy the noted defect, erase it using the visual display unit and restart the
installation.
• Replace the automat.
a) Replace the check valves.
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REMEDIAL ACTION