Xylem Sphere and Block Units Manual do Utilizador descarregar pdf (Página 13)

8. Troubleshooting

If the malfunction is not included in the chart below or is marked by an asterisk, please contact a service

centre near you.

PROBLEM PROBABLE CAUSE NOTES

PUMP DELIVERS No power supply

NO WATER, Overload protection Automatic resetting after

MOTOR DOES tripped cooling (single-phase model)

NOT START Tripping of automatic switch or Reset the switch. If it trips again

differential switch call a qualified electrician

Impeller jammed For e i g n bodies block the

impeller

Faulty capacitor Replace the capacitor.

Minimum pressure setting Reset the pressure switch

too low

PUMP DELIVERS Water level too low and foot Attention: mechanical seal or

NO WATER, valve out of water impeller could be

MOTOR STARTS damaged

Pump not full with liquid or leaks Same as above

Non-return valve clogged

PUMP GIVES Suction lift exceeds pump lift Reduce suction lift.

INSUFFICIENT capacity on friction losses Replace suction pipe with one

WATER OR too high on suction side of larger diameter.

PRESSURE Reduce elbows.

Remove deposits.

Pump or pipes clogged Clean or unclog

Impeller or volute worn

Poor voltage supply

Air inside suction piping

Wrong pressure switch setting Reset the pressure switch

Incorret pump choice

PUMP STARTS Tank air-preloading insufficient Check pre-loading pressure

TOO FREQUENTLY or excessive

Diaphragm broken in the tank

Wrong pressure switch setting Reset the pressure switch

Water leaks through non return

valve or pipes

PUMP DOES Maximum pressure setting Reset the pressure switch

NOT STOP too high

NOISY Suction lift too high

OPERATION

Pump runs beyond rated delivery

Worn bearings

WATER LEAKS Mechanical seal worn or

BETWEEN PUMP damaged

SUPPORT

AND MOTOR

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 39 40

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