Grundfos S2 Série Mode D'emploi page 30

Fault Cause
The pump is partly clogged by impurities.
Wrong direction of rotation.
The pump is operating outside the specified operating
range.
The pump is vibrating or
The pump is defective.
emitting excessive noise.
The pump is improperly connected to the auto coupling.
The pump is cavitating.
The base stand, the auto coupling, the ring stand or the
guide rails are installed incorrectly.
The oil is watery or
The lower mechanical shaft seal is leaking.
emulsified.
Low oil level. The upper mechanical shaft seal is leaking.
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Remedy
Clean the pump.
Interchange two phases in the power supply to the
motor.
Re-establish proper operating conditions.
Repair the pump or contact an authorized workshop, if
necessary.
Pump down the liquid level in pit. Lift out the pump and
relocate the pump on the auto coupling.
Clean the inlet pipe.
Install the components correctly.
Contact an authorized service workshop.
Contact an authorized service workshop.