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5.4 – RESIDUAL RISKS CAUSED BY FAULTY OPERATION
The pump is not provided with audible or visual alarms to indicate
breakages or malfunctioning. Therefore, the user must take suitable
measures to avoid damages (i.e. flooding) caused by failure or faulty
operation of the pump (i.e. installation of alarms, back-up pumps, etc.).
6 - TROUBLESHOOTING
Problem
Motor not turning and no humming
sound
Motor making humming sound but not
turning
Motor turning at low speed and
pump has reduced capacity
Motor turning but reduced or no liquid
capacity
Pump not priming
Pump bubbling air in the suction tank
Motor overheating
Abnormal noise during pumping
Pump leaking
Possible cause
No electricity
System overcurrent or overload protection
triggered
Plug not inserted
Power connections interrupted or incor-
rect electric connection
Switch positioned to "off"
Internal overload protection triggered (only
for pumps provided with this)
Electrical fault
Impeller blocked
Electrical fault
Incorrect supply voltage
Overload
Suction hose end incorrectly positioned
Infiltration of air or leakage of liquid
Hoses or filters (if provided) clogged
Pump clogged
Pump worn
Operating head too high
Excessive suction height
Pump not filled with liquid
Suction hose end incorrectly positioned
Pump incorrectly positioned
Infiltrations of air
Wear and tear on gaskets or seal
Pump worn
Incorrect pumping direction
Overload
Excessive liquid temperature
Electrical fault
Foreign bodies have entered the pump
Impeller broken
Impeller seized
Bearing worn
Wear and tear on gaskets or seal
Remedy
Check the power supply
Reset the protective device; if the problem persists contact
a qualified technician
Insert the plug
Contact a qualified technician
Switch to the correct "on" position
The protection is reactivated automatically; if the protection
is triggered again this means the application is too heavy
for the pump
Contact a qualified technician
Contact a qualified technician
Contact a qualified technician
Supply the pump with the voltage indicated on the
ratings plate
Application too heavy for the pump
See Chapter 4.2.2
Check hoses, tightness of hose clamp, fitting gaskets
Clean hoses and filter
Contact a qualified technician
Contact a qualified technician
Check the head
Check the suction height
Fill the pump with liquid
See Chapter 4.2.2
See Chapter 4.2.1
Check hoses, tightness of hose clamp, fitting gaskets
Contact a qualified technician
Contact a qualified technician
Reverse pumping direction
Application too heavy for the pump
Application too heavy for the pump
Contact a qualified technician
Contact a qualified technician
Contact a qualified technician
Contact a qualified technician
Contact a qualified technician
Contact a qualified technician
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