Possible Cause - Pentair NOCCHI SCM 4 PLUS 40 Manual De Instrucciones

PROBLEM
POSSIBLE CAUSE REMEDY
THE PUMP DOESN'T START, BUT THE FUSES TRIP
AND THE STARTER RELAYS CANNOT BE ENABLED
THE PUMP STARTS, THE FUSES TRIP
AND THE STARTER RELAYS ARE ENABLED
THE PUMP STARTS TOO OFTEN
THE PUMP YIELDS LOW FLOW RATES AND HEADS
THE PUMP DOESN'T PROVIDE WATER

POSSIBLE CAUSE

1) No voltage or incorrect voltage.
2) The command panel is not connected properly.
3) The pump is blocked.
4) Interrupted circuit in the cable or motor winding.
5) The differential switch has tripped.
1) Low voltage.
2) Overload originating from sand clogging.
Bearings tend to block
3) The current that passes through the windings is 1.5-2 above
the rated value (single-phase versions).
4) The differential switch has tripped.
5) The pump is blocked in a non perfectly vertical well.
1) Leakage in the installation.
2) Electric pump capacity too high with respect to the well
(level probes intervene).
3) Pressure switch not correctly calibrated (use with autoclave). Adjust calibration.
4) Tank saturated with water.
5) Autoclave tank too small.
1) IIncorrect direction of rotation (three-phase versions).
2) Leakage in the installation.
3) Filter is clogged or sand in electric pump.
4) Electric pump worn out.
5) The pressure head has been incorrectly calculated.
1) The water level in the well is lower than the suction level or
the stratum has lowered.
2) The valves are blocked or positioned in the opposite direction. Check the valves. If they are blocked, slightly hit the delivery line in the
3) Leaks in the delivery hose.
4) Pump or suction filter clogged with sand.
5) Incorrectly calculated load losses.
6) Worn pump.
7) The voltage is below the rated value and the absorption is
higher than usual.
8) The absorbed current is below ordinary values because
of the presence of air inside the pump.
REMEDY
Check that there is electricity and verify voltage with data on
motor plate.
Correctly connect the control panel.
Remove obstacle from electric pump.
Use an Ohmmeter to control the continuity of the electric system.
Reset switch, if it trips again call a qualified electrician.
Increase the diameter of the supply line.
Extract the pump, repair it and clean it.
Check the voltage on the phases, inspect the condition of the fuses
and of the starter contacts.
Reset the switch. If the switch continues to trip, contact a qualified
electrician.
Move the pump to the correct position and restart it.
Find leak and repair it.
Reduce amount of incoming water from source.
Restore correct tank functioning.
Replace the tank.
Reverse two power supply phases in the command panel.
Find leak and repair it.
Remove the unit and clean the filter.
Extract the pump, inspect it and replace the worn parts or the pump.
Revise calculations and replace the pump, if necessary.
Check the stratum level during the pump operation and reposition the
pump into the well.
attempt of moving the valve.
Inspect the line, find possible leaks and repair them.
Extract the pump and clean the filter and the parts clogged with sand.
Revise the calculations and use a hose with a larger diameter or
replace the pump.
Replace the pump.
Increase the voltage. Increase the diameter of the supply cable.
Start the pump and stop it at intervals of about one minute.
GB
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