8
ENGLISH
the
pumps,
when
starting
and
when
stopping,
manoeuvring the downstream valve.
NB: avoid prolonged operation with the isolating valve
downstream of the system closed, to prevent damaging the
pump (internal overheating).
11. MAINTENANCE
ATTENTION
Extraordinary
maintenance
and
repair
operations must be performed by qualified
personnel (refer to the definition of qualified
personnel in the INTRODUCTION chapter).
Failure to observe this rule voids the warranty
and puts the health of workers and the
efficiency of the set at serious risk.
Every maintenance and repair operation must
be performed with the set disconnected from
the electrical power supply.
Pressure booster sets do not require any particular
maintenance. The operations to perform are divided between
ordinary and extraordinary maintenance operations depending
on the skills required for the relative operation. Also refer to the
instruction manual for the electric pump, the electric panel or
the control device. Any problems can be solved by consulting
the table below. It is recommended in case of a problem not
indicated in the table, for operations indicated in the table that
require the intervention of qualified personnel (refer to the
definition of qualified personnel in the INTRODUCTION
chapter) or for other requirements, to contact your closest
service centre or distributor.
11.1. ORDINARY MAINTENANCE
Ordinary maintenance consists of simple control operations
that can be performed by the operator who uses the set. The
frequency of the checks is indicated in detail for each
operation.
Check the state of wear of the set's electrical cables and
the electrical connections. If breakage or deterioration is
found in the cable's protective sheaths, in the case of
insecure connections or any faults, contact your closest
service centre or distributor. (EVERY 6 MONTHS).
Check that the set is operating efficiency by opening the
valve downstream of the set itself to check that the pumps
start, following the procedure
described in
the
“STARTING THE SYSTEM” chapter. If problems are
found when starting the pumps, contact your closest
service centre or distributor. (MONTHLY).
Check that the hydraulic connections upstream and
downstream of the pressure booster system do not leak
while the system is operating. Check that the system
isolating and stop valves are not clogged. If necessary,
restore the line to its original state. (EVERY 6 MONTHS).
11.2. EXTRAORDINARY MAINTENANCE
Extraordinary maintenance, just like the repair operations, may
only be performed by qualified personnel (refer to the definition
of qualified personnel in the INTRODUCTION chapter).
If faults are found during operation and ordinary maintenance
(see what is described in the ordinary maintenance chapter) or
if abnormal noises or vibrations are detected, stop the set and
immediately contact your closest service centre or distributor
(the complete list of resellers and service centres can be
viewed at
) for the suitable extraordinary
maintenance operations.
11.3. FAULT AND INTERVENTION TABLE
ATTENTION
For every control below indicated, we suggest ask
support by an EBARA authorized assistance
center.
TROUBLE
CAUSE
SOLUTION
THE PUMP
DOESN'T START
Missing or
interrupted main
voltage
Check the main
voltage presence
Wrong voltage
Pressure sensor
detect wrong
value
Clean or change the
pressure sensor
(on EP-E control
panel only)
Check the proper
scale sensor setting
on the control device
(on EP-E control
panel only)
Pressure
switchies not
properly setted
Check the proper
pressure switches
setting
Stucked control
panel breakers
Check and change
the breakers
Broken fuses
Change the fuses
Overcurrent
protection
operation
Check the proper
overcurrent
protection setting
(see the motor data
and control panel
user manual)
External
protection
operation (e.g.
minimum float
switch)
Check the water
availability and / or
the remote control
proper function
Blocked pump
Check and remove
the blockage causes
Fault motor
Fix or change the
motor
Incorrect setting
of restart
pressure
Check set pressure
and restart pressure
setting
Dry run protection
operation
Check connection of
suction pipes
Check water
availability
Check for air leaks
or infiltrations from
suction pipes
Check correct sizing
of suction pipes
Check correct pump
priming
THE PUMP
DOESN'T STOP
Required working
pressure too high
Set the working
pressure based on
the plant and pump
features
Wrong rotation
sense (low
performances)
Check the rotation
sense and phases
connection
Stuck control
panel breakers
Check and change
the breakers
Pump not
properly primed
and doesn't
achieve required
Properly prime the
pump and check for
air infiltration and/or
leaks
Summary of Contents for GP
Page 2: ......
