Pressure And Temperature Digital Readouts; Programming Load-Unload Pressure Setpoints - Gardner Denver EDF-KB Operating And Service Manual

Machine damage can occur with ex-
tended operation after the "Change
Air Filter" LED illuminates. Service
the air filter as soon as possible.
Pressure And Temperature Digital Readouts –
These readouts normally indicate pressure at the mini-
mum pressure check valve and temperature at the air
end discharge. See "High Air Temperature LED" above
for a description of readout action during a high temper-
ature 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 4–4, below, for definitions. An er-
ror message will stop the compressor, if running, and
prevent 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
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
readouts and LED's are flashing, a power interruption
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 4–4 – DEFINITION OF ERROR MESSAGES
13–8–606 Page 21
Stop the compressor and remove all power
from the unit by opening main disconnect.
Electrical shock can cause injury or
death. Open main disconnect, tag
and lockout power supply to the start-
er and any other circuits before work-
ing 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 the 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:
Temperature Readout
Meaning
Failure of Compressor Temperature Sensor
Failure of Separator Temperature Sensor
Failure of Both Temperature Sensors