SAER Elettropompe MBS Manual De Empleo Y Mantenimiento página 10

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ELETTROPOMPE
be necessary to stop the pump and to find the cause.
WARNING If the electropump remains inactive at low temperatures or, at any rate, for a period exceeding three months,
it is a good idea to empty the pump through the specific cap (MBS-H version) or through the inlet (MBS
version).
7. MAINTENANCE
The MBS and MBS-H series electric pumps can be considered free from routine maintenance. In case extraordinary
maintenance is required, get in touch with the SAER Technical Assistance. Do not modify the product without the
necessary preventive authorization.
Before executing any operation, turn off the power and prevent it from being reconnected.
The replacement of the feeding cable must be done by an authorised distributor.
CHANGEOVER FROM MBS VERSION TO MBS-H VERSION
To transform the submersible pump MBS in a surface pump MBS-H the suction base ant it's gasket are necessary.
Then the following operations must be followed. (fig.7): remove the cap (3 screws), remove the grid (4 built in hexagon
screws), plug in the casing gasket and fix the base using the 4 fixing screws of the grid.
8. DECOMISSIONING AND DISPOSAL
At the end of the operating life of the motor or any of its parts, it must be disposed of in observance of current regulations.
This is also valid for the liquid contents, with particular regard if classified toxic or harmful.
9. FAILURES, CAUSES AND REMEDIES
Failures Causes
Voltage does not get to the feeding cable
The motor will
not start
The fuses are burnt out (only 3phases version)
Motor cable broken
The thermal relay has
The relay has not be set correctly
tripped, absorption
is normal
Faulty thermal relay
Supply voltage is different to the motor' s
The thermal relay has
tripped, absorption is
Loose cable terminals
high
The pump or the motor are blocked
Excessive quantity of sand in the water
Voltage is not the same on all 3 phases
The thermal relay has
tripped, absorption is
(only 3phases version)
unbalanced
A cable is earthed
The winding is earthed
The pump or the motor are blocked
Incorrect connection of the motor
Incorrect rotation direction (only 3phases version)
Lower head than
declared value
Leaks in the delivery pipe system
Worn parts inside the pump
Worn mechanical parts
The unit vibrates
The NPSH of the system is insufficient
(only MBS-H version)
Minimum level beyond the suction grid
Insufficient or zero flow
not respected (MBS)
Obstructed grid (only MBS version)
The pump has not been filled with
water (only MBS-H)
The suction pipe is narrow or it is leaking
(only MBS-H )
The foot valve is clogged (only MBS-H)
Impellers clogged
The level in the well drops more
than expected
10
Remedies
Check appliance and/or electricity line
Replace the fuses with new ones
Replace the cable
Repeat the setting of the relay again
Replace the relay
Change the supply voltage or the motor
Tighten all the terminals
Remove and repair
Reduce pump delivery by adjusting the gate valve
Control the appliance and electric line
Replace the cable
Replace the motor
Dismantle and service
Control connections
Invert the rotation direction
Replace the pipe or the seal
Dismantle the pump and service
Dismantle the pump and service
Reduce delivery
Lower the installation depth of the pump
Reduce the quote of installation
of the pump
Clean the grid
Fill the pump
Replace the damaged pipe or gland
Clean or replace the valve
Dismantle and overhaul
Check the capacity of the well
GB