ISM0210 Instruction Manual of series SCE- Rev.03
Pag. 19/33
The head required is lower than that
provided by the pump
Reduce the speed of rotation, if possible; reduce the impeller
diameter; partially close the discharge valve.
OVERHEATING OR MOTOR STOP
Excessive pumped liquid density
Reduce the flow by closing the valve outlet partially
The pump has seized or is about to seize
.
Check the free rotation of the impeller. Check for internal
obstructions
.
The motor and pump are misaligned
Refer to section 3.8 of this manual
The motor bearings are damaged or worn
.
Replace the motor bearings, investigate the causes of
breakage.
Motor under dimensioned
Mount a more powerful motor (check in advance with your
distributor
M PUMPS PROCESS
).
Motor overload threshold set incorrectly
Check
the security settings of the motor
The guard against the motor dry running
(where present) has failed or has been set
incorrectly
.
Control flow decreases or fluid intake
.
FUNCTIONING WITH NOISE DEFECTS AND/OR
VIBRATIONS
Causes
Remedies / actions
Insufficient inlet pressure, consequent
cavitation, insufficient lubrication of the
bearings (with mechanical damages if the
condition persists).
STOP IMMEDIATELY THE PUMP!
Refer to paragraphs 3.4, 3.5, 4.1, 4.2, 4.3 of this manual
Wear, erosion and immediate damage to the
impeller and internal bearings.
Check inside the pump damages or obstructions.
Wear of the coupling motor-pump
Replace the coupling and proceed to the realignment of
pump and motor.
