
11
13. TROUBLESHOOTING
If you encounter a fault that is not contemplated in the following table, contact the nearest authorized dealer.
PROBLEM
CAUSE
ACTION
Pump fails to start.
The pump starts but stops again
immediately
Loss of phase
Inspect the connections and magnetic switch
Incorrect connection of the electrical power supply
circuit
Inspect the electrical power supply circuit
A fuse has blown
Replace it with a suitable new one
Activation of a earth failure protection switch
Repair the section where the current dispersion
has occurred
The motor has burned out
Repair or replace the motor
A motor bearing has broken
Repair or replace the bearing
The impeller has blocked
Clean pump suction
The mechanical seal has blocked
Repair or replace the mechanical seal
The pump starts but stops after a while
Dry operation for a prolonged period of time activates
the thermal protection
Increase water level
High liquid temperature activates the thermal protection Lower water temperature
Flow rate insufficient
Rotation in opposite direction
(Three-phase pumps only)
Invert two of the phases
Low water level generating a vacuum of the air
Increase water level or lower the pump position
Delivery line blocked
Remove the foreign body
Adhesion of a foreign body to the suction filter
Remove the foreign body
Impeller damaged
Replace the impeller
Over-current
Ample drop of voltage of the electrical supply
Ensure a specialised technician checks the electrical
system
Loss of phase
Inspect the connection section and magnetic switch
Pump operation with opposite rotation direction
Check direction of rotation (see chap. 9)
The pump has suctioned up a foreign body
Remove the foreign body
The motor bearing has broken
Repair or replace the bearing
The pump vibrates generating
a loud noise
Pump operation with opposite rotation direction (Three-
phase pumps only)
Check direction of rotation (see chap. 9)
The pump has suctioned up a foreign body
Remove the foreign body
Resonance on delivery lines
Modify the line
14. DEMOLITION
When disposing of the pump, comply strictly with the regulations in force in your country, making sure none of the fluid
treated is left inside the pump.
Pay careful attention to the oil in the mechanical seal chamber.
EN
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