EN
80446339
Rev B
EN-16
OPERATING INSTRUCTIONS FOR FIXED SPEED (FS)
Figure 13: Controller Interface
SG Controller Controls (Fixed Speed)
1 . EMERGENCY STOP
Pressing this switch stops the compressor immediately. The compressor
can not be restarted until the switch is manually reset. Turn the switch knob
clockwise to reset.
The controller display will illuminate, indicating that the line and control
voltages are available.
2 . START
Pressing this button will start the compressor if the display shows READY TO
START. The compressor will start and load if there is sufficient demand for air.
3 . STOP
Pressing this button will activate the unloaded stop sequence. If the
compressor is running loaded, it will unload and continue to run unloaded
for an adjustable 10 to 0 seconds and then stop. If the compressor is running
unloaded, it will stop immediately.
4 . UNLOAD
Pressing this button will cause the compressor to unload and remain
unloaded. The display will indicate that the compressor is RUNNING
UNLOADED and MODE:UNLOAD.
5 . LOAD
Pressing this button will cause the compressor to load if the compressor is
running and if the DISCHARGE PRESSURE is less than the ONLINE PRESSURE.
This also returns the compressor to the operating mode that is specified by
the MODE OF OPERATION set point.
The other five buttons provide access to various operator–selectable
functions and compressor operating conditions. The purpose of each of these
buttons is defined by the display screen and the particular function being
performed at that time.
6 . ARROWS
These up and down buttons have multiple functions relating to the right half
of the display screen. When lists are presented, the buttons are used to move
up or down through the items on the list. The small arrow(s) displayed in the
upper right hand corner of the display screen indicate when you can move
up (designated by arrow head pointing up) and/or down (designated by
arrow head pointing down) through the list.
When the value of a specific compressor operating parameter is highlighted
on the display screen for the purpose of changing that value, the buttons are
used to change the value itself.
7 . DISPLAY BUTTONS
The functions of the three buttons below the display screen change and
are defined by the words immediately above them in the bottom line of
the screen. Each function, such as MAIN MENU, STATUS, etc., is described in
appropriate sections in this manual.
Display screen
Figure 14: Display Screen
The display screen is divided into three functional areas, as seen in the typical
CURRENT STATUS screen shown here.
The left side continuously shows the package discharge pressure in large
numbers showing the running condition of the compressor and the line
below that showing the present mode of operation.
The right side shows various items or lists such as the compressor’s CURRENT
STATUS readings, the MAIN MENU, the OPERATOR SETPOINTS list, etc. Any of
the lists can be moved up or down by pressing the arrow buttons to the right
of the screen. The small arrow(s) displayed in the upper right corner of the
screen indicate when you can move up and/or down through a list. The arrow
buttons are also used to change an individual item’s value. At certain times,
items and/or their values are “highlighted”. This means that they are displayed
as light characters on a dark background.
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