Product Manual

Page 8 of 13
TROUBLE SHOOTING
PROBLEM
POSSIBLE CAUSE
CORRECTIVE ACTION
Lack of power
Check electrical connections and safety
systems
Rotor jams
Check for possible damage or obstruction to
rotating parts
Thermal motor protector has
triggered
Wait until the motor cools, verify that it starts
again, look for the cause of overheating
Motor does not turn
Problems with the motor
Contact technical support
Low voltage from the electrical
power supply
Adjust the voltage within anticipated limits
Motor turns slowly when
starting
Excessive oil viscosity
Verify oil temperature and warm it to reduce
excessive viscosity
Low level in the suction tank
Fill in the tank
Foot valve blocked
Clean and/or replace valve
Filter blocked
Clean the filter
Excessive suction pressure
Lower the pump with respect to the level of the
tank or increase the cross-section of the hose
High load loss in the delivery circuit
(running with by-pass open)
Use shorter hose or of wider diameter
Bypass valve blocked
Detach the valve, clean or replace it
Air in the pump or suction hose
Check the seal of the connection
Narrowing of the suction hose
Use a hose appropriate for working under
suction pressure
Low rotation speed
Check the voltage at the pump. Adjust the
voltage or use cables of greater cross-section
Little or no flow
Excessive oil viscosity
Verify the oil temperature and warm it to reduce
the excessive viscosity
Capitation
Reduce the suction pressure
Irregular bypass functioning
Deliver until the air in the by-pass system is
purged
Higher pump noise
Presence of the air in the oil
Wait for the oil in the tank to settle
Leakage from the pump
body
Damage to the mechanical seal
Check and replace the mechanical seal