EBARA EVMSU - Maintenance and Repair Procedures; Troubleshooting and Technical Data; Pump Troubleshooting Guide

EBARA Pumps Americas Corporation
www.pumpsebara.com
11
rev. 01/19
11. MAINTENANCE AND REPAIRS
ALWAYS DISCONNECT ALL POWER BEFORE
PERFORMING ANY MAINTENANCE WORK ON
THE PUMP AND MOTOR.
Before servicing the pump, be sure to relieve the
system pressure. Removing components under
pressure may result in injury or damage.
Use a pressure bleed valve in hot water applications
where water temperature could cause physical
injury.
Regularly scheduled maintenance should not be necessary.
However, periodic inspectionis recommended to ensure the
pump is running properly. Periodic checks and preventive mainte-
nance will reduce sudden or significant problems and repairs.
Common maintenance operations include:
− replacement of mechanical seals
− replacement of grommets
− replacement of bearings
− replacement of single-phase moor capacitors.
Although subject to typical wear, correct operation of the pump
will prolong the service life of these parts.
If the pump will not be operated and inactive for a long period, it
should be emptied completely, with the discharge and fill caps
removed, then washed and rinsed carefully with clean water. Avoid
leaving residual water inside the pump.
To prevent damage to pump components, these steps should
also be followed if freezing temperatures are expected.
11.1 REPLACEMENT OF SHAFT SEAL [- C -]
See pictorial instructions on pages 16-19.
The mechanical seal must be set following the
procedure outlined in the seal replacement
instructions. Ensure that the seal holder (locking
collar) set screws are tightened. Failure to set the
mechanical seal may result in damage to the pump.
12. DISPOSAL
The user is responsible for disposing of the equipment by taking
it to a collection and recycling facility authorized to dispose of
electrical waste. Please adhere to local waste disposal
regulations should the product become defunct and need to be
“scrapped.” Completely empty the product of all fluids – do not
leave any treated fluid inside it. EBARA pumps should not
(typically) contain hazardous polluting material. For further
information on equipment collection points, contact your local
waste disposal authority.
13. TROUBLESHOOTING
When performing repair work, order original spare parts
from our sales and customer support network.
Non-original spare parts can damage the product and are
a hazard for persons and property.
DISPLAYED FAULT
CAUSE SOLUTION
THE PUMP DOES
NOT WORK
The motor does not
turn
Float sticking
reaches the level ON
Thermal protection ac-
tivated (single phase)
It reactivates
automatically
(single phase only)
Incorrect electrical
connection
Check the terminal
board and the
electrica
l panel
Automatic switch
triggered or fuses
blown (*)
Reset the switch or
replace the fuses and
verify the cause
No electricity
Check the electrical
supply meter
Plug not inserted
Check the connection
to the power supply
Built-in thermal ov
er-
load protection device
cutout in control panel
tripped (*)
Wait for built-in thermal
overload protection
device to reset or reset
thermal cutout in con-
trol panel
Device protecting
against dry running
tripped (*)
Check water level and/
or correct connection
of system devices
(*) If you encounter the same trouble again, call our Service Department
THE PUMP DOES
NOT WORK
The motor turns
Decrease in the line
Suction filter / inlet
voltage
Wait for voltage to
return to normal
blocked
Clean filter/inlet
Foot valve
blocked (**)
Release or clean the
valve and check that it
works p
roperly
Pump has not been
Fill (sect. 9)
Water level low (if no
protection system is
Restore water level
Pump not primed
Prime the pump
Check any isolation and
check valves
Check the liquid level
Pressure too low
Restrict the
discharge line
(**) Caution: mechanical seal could be damaged
WARNING!