To run the compressor in modulate mode merely press the load switch again.
This will put the compressor in modulate/ACS and it will operate automatically
from this point.
Each time the load button is depressed the compressor will switch to another
mode of operation.
All Intellisys have ACS as a standard feature. On the original Intellisys however,
it was not printed on the face of the controller. The most recent controller has
Modulate/ACS printed on the face.
On the original Controller ACS operates as follows: While running in the ON/
OFF LINE MODE and the machine cycles three times in three minutes, the
controller will automatically shift to modulation. While running in the modulate
mode and the machine runs unloaded for three minutes, the controller will shift
back to ON/OFF LINE. The green LED lights will follow these shifts.
On newer Intellisys with ACS printed on the face, the controller activates the
ACS mode differently. If this controller is manually placed in the ON/OFF LINE
mode, it will stay in this mode and not shift automatically to modulate. The
controller must be placed in the Modulate/ACS Mode position in order for the unit
to modulate and shift into ON/OFF LINE if demand indicates. Unlike the original
controller, the green LED lights will not shift position.
In any mode of operation pressing the display-select button will change the value
that is being read. The legend next to the display-select is to show what is being
displayed. Each successive depression of the display-select moves the
selection down one.
After 10 minutes of no activity on the display-select, the display will automatically
revert to the default setting which is discharge air pressure.
To stop the compressor, merely press the unloaded stop button. The compres-
sor will initially unload and operate unloaded for approximately 7 seconds at
which point it will stop. This unloaded stop has been installed to insure the most
optimal operation of the compressor.
The emergency stop button is provided for emergency operation. This device
immediately breaks the 115 volt AC supply voltage to the compressor. This
switch should be used with care since it may cause damage to the compressor.
It is truly provided for emergency purposes only.
The set button in conjunction with the up and down arrows is used to make
adjustments to the machine. In order to utilize this feature, the machine must
be stopped.
The first press of the set button will put the controller into the set mode and light
the first setable parameter, Set Off Line Air Pressure.
By pressing the up or down step arrows the value shown in the window will
change. When the desired value is selected, press the set button to fix it into
memory.
The display will shift down to the next setable parameter. The unit will loop
around when it gets to the bottom. When an option is not installed, dashes will
appear in the display.
If the Intellisys is allowed to remain in the SET POINT mode with no change for
more than fifteen seconds the system will return to READY mode as announced
by the 0 in the display.
The set button also serves the functions of clearing an alarm. Pressing the set
button twice will clear the alarm.
The 2 step arrows also perform another function of calibrating the pressure
sensor. Any time the pressure sensor or controller are changed, the unit should
be re-calibrated. To re-calibrate, have the compressor off with zero pressure on
the pressure sensor and press both step arrows simultaneously once.
INDICATOR LIGHTS
The Intellisys controller features two indicator lights. One being the power-on
light and the other being the automatic re-start indicator light.
The power-on light indicates that there is 115 volt control voltage to the Intellisys.
In the event that the power light is lit and the display is blank, that indicates that
there is a fault in the Intellisys and that it has to be changed out. In the event that
the power light is not lit, but the display is lit, it means that the power-on light is
burned out. This is not a field replaceable item and the Intellisys should be
replaced.
The other indicator light is the automatic restart indicator light. This light
indicates that the compressor has shut down automatically due to the fact that
the line pressure exceeds the off-line limit that has been programmed into the
unit. With this light lit the compressor is able and probable to start at any time.
MESSAGES
The Intellisys Controller display 12 numeric fault codes in the display window,
except that some early units do not have a -12- code.
Displays 1 through 12 indicate fault annunciation with the unit. All fault
annunciation is identifiable by the preceeding and trailing dash. In other words,
the display would show a -01-.
The fault codes will only appear when an actual fault is detected. This will be
demonstrated.
MESSAGE -01- STARTER FAILURE
The way the Intellisys controller has determined whether it is a starter failure or
not is by checking the condition of the starter interlock switch. Remember to
remove all electrical power from the compressor. Lock and tag the disconnect
switch.
Upon this fault, the first thing you should do is to check the functioning of the
starter interlock switch. This can be done by removing the control wiring to the
switch and attaching a continuity checker.
-5- -6-
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