3
EN
- Check to assure that the sense of rotation of the
motor coincides with that indicated on the fan cover.
If you are checking threephase motor and the sense
of rotation is wrong, invert two phases on the
protection board.
THIS PUMP SHOULD NEVER BE DRY OPERATED.
7. STARTING
- Open all gate valves installed in the suction and
discharge circuits.
- Check absorbed current and adjust thermal relay
conveniently only when operating with three-phase
pumps.
- If motor failed to start or did not pump water up, refer
to our ”Trouble Shooting” list and identify your
problem. Then follow instruction on what action to
take.
8. MAINTENANCE
- Our pumps do not need any special or programmed
maintenance. Pump body should, however, be
drained during periods of low temperatures or long
periods of inactivity. To empty pump, only remove
drain plug (Pic. 5). If the inactivity persisted, pump
should be cleaned and stored in a dry aired room
9.FAULT FINDING CHART
Before attempting to diagnose any fault, make sure that the electricity supply has been switched off.
FAULT
CAUSE
Pump does not start.
- Supply failure.
- Control circuit has cut out or is defective.
- Motor is defective.
- Pump is blocked by impurities.
Pump runs but gives no water.
- Pump is not filled with liquid.
- Suction or discharge pipe is blocked by impurities.
- Pump is blocked by impurities.
- Suction lift is too great.
- Leakage in suction pipe.
- Foot or non-return valve is blocked.
Pump runs at reduced capacity.
- Wrong direction of rotation (threephase).
- Suction lift is too great.
- Suction or discharge pipe is blocked.
- Pump is blocked by impurities.
- Foot or non-return valve is partly blocked.
Pump stops during operation.
- Thermal overload switch in motor or external motor protection cuts out.
- Control circuit has cut out.
If in spite of carring out the above operations the problem still persists contact the nearest service centre
Pic.4
PRIMING HOLE
Pic.5
DRAIN PLUG
