M Pumps V MODULAR Series, User Manual

Page: 18 / 32

Pag. 18/32
Doc. ISM0023 Instruction Manual of series V MODULAR – Rev.02
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
).
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.
Ball bearings or motor failure. Check and replace them if necessary.
Uninsured motor or base plate
.
Make sure that the motor and base plate are firmly
anchored to foundations and do not produce any
abnormal vibration.
Misalignment or improper anchoring of the
pipes.
Check correct alignment of pipes and supports, refer to
section 3.2 of this manual
.