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Machine damage can occur with ex-
tended operation after "Change Air
Filter" LED illuminates. Service air fil-
ter as soon as possible.
Pressure And Temperature Digital Readouts –
These readouts normally indicate pressure after the
minimum pressure check valve and temperature at the
air end discharge. See "High Air Temperature LED",
page 18, for a description of readout action during a
high temperature condition.
Alternately, these readouts can be selected to display
oil reservoir pressure and separator air temperature. To
obtain such display while the compressor is running,
simply press the operating mode button that corre-
sponds to the current operating mode of the unit. (For
Example: If the unit is operating in "AUTO LEAD"
mode, press the "AUTO LEAD" button.) This will cause
the readout to display the alternate parameters. This al-
ternate display mode is indicated by illuminated deci-
mal points in the lower right hand corner of each dis-
play. After releasing the button, the display will revert
to its normal mode in 5 seconds.
The digital readouts are also used to display error mes-
sages. These error messages correspond to various
indications concerning condition of pressure and tem-
perature sensors and EMERGENCY STOP condition.
DEFINITIONS OF ERROR MESSAGES – Refer to
the chart in FIGURE 4–5 below for definitions. An error
message will stop the compressor, if running, and pre-
vent it from restarting. The failed sensor must be re-
placed to clear the error.
Any condition requiring the control panel to be reset will
be indicated by a flashing "STOP/RESET" LED. If all
readouts and LED's are flashing, a power interruption
Pressure Readout
Error #
Meaning
E01
Failure of Final Discharge Pressure Sensor
E02
Failure of Oil Sump Pressure Sensor
E03
Failure of Both Pressure Sensors
E04
EMERGENCY STOP
has occurred, requiring the control panel to be reset.
Programming The Load–Unload Pressure Set-
points – Programming of the Load and Unload Pres-
sure setpoints can only be accomplished with the unit
not running.
Step 1:
Step 2:
Step 3:
Error #
E01
E02
E03
FIGURE 4–5 – DEFINITION OF ERROR MESSAGES
13–8–612
Page 19
Stop the compressor and remove all power
from the unit by opening main disconnect.
Electrical shock can cause injury or
death.
Open main disconnect and
any other circuits, tag and lockout be-
fore working inside the control box.
Turn the "Setup" switch located on the con-
troller circuit board (inner side of control box
panel) to the "+" position. Close control box
panel and restore power.
This switch is provided to prevent un-
authorized programming of the set-
points. If this level of security is not
required, the "Setup" switch can be
left in the "+" position, eliminating
Steps 1 and 2.
With the unit already in the STOP/RESET
condition, press the "STOP/RESET" button
a second time. This puts the controller in pro-
gram mode. The displays will read as follows:
Pressure:
the current unload setpoint (adj.
58–175 psig)
Temperature Readout
Meaning
Failure of Compressor Temperature Sensor
Failure of Separator Temperature Sensor
Failure of Both Temperature Sensors
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