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Starting the Pump
If the forepump and vent device are not operated by the
controller, close the vent valve and switch on the
forepump.
With the FRONT panel operation selected, the
REMOTE and RS 232 operations are inoperative;
conversely,
the
CYCLE
CURRENT pushbuttons are always active, even when
the
operating
mode
RS 232.
•
Press the START pushbutton (or use the remote or
RS 232 start signal), and the display shows:
S O F T
S T A R T
[
.
.
.
.
Where the sign minus (-) become a square ( ž )
when
the
pump
The active step is indicated
square (€ ž ).
•
As the ten steps are fully covered, the pump will
reach the Normal operation. If during the Soft Start
mode the current drawn by the pump exceed 1.7 A
the speed of the pump is decreased to maintain the
maximum power allowable (1.7 A).
NOTE
NUMBER
and
PUMP
selected
is
REMOTE
O N
.
.
.
.
.
.
]
finish
the
ramp-up
by a flashing
•
If the Soft Start mode has been deselected the display
will change and shows:
P U M P
1 2
where:
1 2 = contrast inverted identifies the set point
condition:
or
− 1 is displayed when relay R1 is de-energized
and the related output is zero voltage.
− 2 is displayed when relay R2 is energized and
the related output is 24 V.
XX KRPM = indicates the actual theoretical
rotational speed of the pump as a function of the
controller
56 KRPM).
After START command, voltage and frequency
output will be at the maximum level, then the
frequency will decrease to a value proportional to
the pump rotational speed (about 1/8 of nominal
frequency if the pump is completely stopped). The
pump will accelerate to its normal rotational speed.
During acceleration of the pump or during any
operating condition, it is always possible to select
the other parameters to be displayed pressing the
PUMP
pushbuttons.
•
When the normal rotational speed is reached, the
display will be as follows, even if any previous
display selection was made, and the normal
condition has been reached.
N O R M A L
step.
where:
(56 KRPM for high speed, or 37 KRPM for low
speed).
66
TECHNICAL INFORMATION
I
S
S T A R T
X X
K R P M
output
frequency
CURRENT
or
the
CYCLE
O P E R A T
X X
K R P M
XX
=indicates
the
87-900-854-01 (C)
I
N G
(range
3
to
NUMBER
I O N
rotational
speed
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