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cates
that the temperature
displayed
is at the oil sepa-
rator. A non-illuminated
decimal
point indicates
com-
pressor
discharge.
Pressing
"STOP/RESET"
will
extinguish
the LED (if the temperature
has lowered
below 225"F) and revert the digital readout to displaying
actual discharge
temperature.
"MOTOR OVERLOAD'
LED - This LED indicates that
the motor overload relay has tripped. The overload relay
itself must be reset before pressing "STOP/RESET" will
extinguish the LED.
"CHANGE SEPARATOR" LED - This LED flashes when
the differential pressure across the oil separator reaches
approximately 8 PSI. At this point, schedule the separa-
tor element for service at the earliest opportunity. (See
Section 5, pages 4 & 5, for separator maintenance.)
Should the condition be ignored and allowed to further
deteriorate, the compressor will be shutdown and the
LED illuminated steadily when the differential pressure
reaches 15 PSI.
I
CAUTION
I
Machine damage will occur if repeat-
edly restarted after any one of the shut-
down modes stops operation
of the
unit. Find and correct the malfunction
before resuming operation.
"CHANGE AIR FILTER" LED -This LED is used to signal
when the air filter requires servicing or changing. It is a
reminder only and will not stop or impede the operation
of the unit. Operating the compressor with the LED
illuminated risks collapse of the filter and ingestion into
the compressor.
I
CAUTION
Machine
damage
can occur with ex-
tended operation after "Change Air Fil-
ter" LED illuminates.
Service air filter
as soon as possible.
I
Pressure And Temperature
Digital Readouts - These
readouts normally indicate pressure at the minimum
pressure check valve and temperature at the air end
discharge. See "High AIr Temperature LED," page 3, this
section, for a description of readout action during a high
temperature condition. Alternate y, these readouts can
be selected to display oil reservoir pressure and sepa-
rator air temperature. To obtain such display while the
compressor is running, simply press the operating mode
button that corresponds 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 pa-
rameters. This alternate display mode is indicated by
illuminated decimal points in the lower right hand corner
of each display. 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 the pressure and
temperature sensors and EMERGENCY STOP condi-
tion.
DEFINITIONS OF ERROR MESSAGES - Refer to chart
in Figure 4-4 below for definitions.
An error message will stop the compressor, if running,
and prevent it from restarting. The failed sensor must be
replaced 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
has occurred, requiring the control panel to be reset.
Programming The Load-Unload
Pressure Setpoints
- Programming
of the Load and Unload Pressure
setpoints can only be accomplished with the unit not
running.
SteP I:
StoP the comPressor and disconnect, tag and
lockout the power supply to the starter -
Pressure Readout
Temperature Readout
Error #
Meaning
Error #
Meaning
EO1
Failure of final discharge pressure sensor
EO1
Failure of compressor temperature sensor
E02
Failure of oil sump pressure sensor
E02
Failure of separator temperature sensor
E03
Failure of both pressure sensors
E03
Failure of both temperature sensors
E04
EMERGENCY STOP
FIGURE 4-4-
DEFINITIONS OF ERROR MESSAGES
13-8-610
section
4
Page
4
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