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or twice if the display shows other parameters, either
before starting the pump or after it is operating.
If LOW SPEED is selected before starting the pump,
the display shows:
R E A D Y
F O R
S O F T
S T A R T
The pump reaches the Normal high speed, then
decrease the speed to the low speed value and the
display shows:
A P P R O A C H
X X
If the Soft Start has been deselected the display shows:
P U M P
R E A D Y
S T A R T
where: LS = means low speed mode is selected.
After starting, a LS appears on the right bottom corner
of the following displays:
S O F T
S T A R T
[
-
-
-
-
P U M P
I
S
1 2
X X
N O R M A L
X X
and when the pump reaches the low speed value, display
reverts to:
N O R M A L
2 5
L O C A L
L S
I
N G
L S
K R P M
L S
:
P U S H
B U T T O N
L S
O N
-
-
-
-
-
-
]
L S
S T A R T
I
N G
K R P M
L S
O P E R A T
I O N
K R P M
L S
O P E R A T
I O N
K R P M
L S
With normal LOW SPEED operation, the pump will run
at about 2/3 of its nominal speed and achieves a base
pressure
somewhat
specifications. If the gas load becomes higher, the
controller output frequency and voltage start to
decrease automatically, and the Turbo-V pump is
slowed down in proportion to the gas load until it
reaches about 3 KRPM.
If the LOW SPEED mode is selected after normal
operating condition is reached, the display shows:
A P P R O A C H
X X
while approaching the low speed value.
When the low speed mode is deselected the pump
starts to accelerate to its rotational speed. When this is
reached, the display shows:
N O R M A L
X X
90
TECHNICAL INFORMATION
higher
than
the
standard
I
N G
L S
K R P M
O P E R A T
I O N
K R P M
87-900-906-01 (E)
L S
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