43
Operation
Procedure
4
SWITCH OFF THE
SLAVE UNIT
Switch off power to the inverter SLAVE
5
ADDRESS THE
INVERTER
MASTER
Turn on the drive that works as MASTER and set the parameter W in the
menu ADV as
W = MS (master)
6
PUMP ROTATION CHECK
(surface pumps)
See procedure at point 2
6a
PUMP ROTATION CHECK
(submersible pumps)
See procedure at point 2a
7
SETTING THE
PRESSURE
SENSOR RANGE
Set the parameter SS in ADV menu to the full scale value of the pressure
sensor (default 10 bar)
8
SETTING THE
OFF FREQUENCY
(switch off
frequency)
-
turn on in automatic mode (key START) with an open tap
-
press together the UP ARROW and DOWN ARROW
-
adjust the required minimum flow (off-flow)
-
wait for the floe stabilization
-
press ENTER to confirm the switch-off frequency
9
DRY RUNNING PROTECTION
THROUGH PARAMETER COSPHI
See procedure at point 3
10
SETTING THE
MINIMUM
WORKING
PRESSURE
Set the parameter Pd in ADV menu at the minimum acceptable working
pressure, in % of the SET PRESSURE.
e.g. PSET = 4 bar; if PD = 50% the inverter will fall in DRY RUNNING at 2
bar.
11
SWITCH OFF THE
MASTER UNIT
Switch off power to the inverter MASTER
12
CONNECTION OF
THE INVERTERS
Connect the inverters through the
RS485
standard as shown at page 6 ot
the Manual.
13
PUMP UNIT
STARTUP AND
CHECKS
Switch on power to all the inverters
Go to automatic work by pressing START on the MASTER unit
Open all the taps to start both the inverters
1. Check the
unit stop
by closing all the taps
2. Check the MASTER pump
DRY RUNNING alarm
by closing the
MASTER suction valve
3. Check the SLAVE pump
DRY RUNNING alarm
by closing the SLAVE
suction valve
