Section 4
SUPERVISOR
14
4.9 CONTROL SYSTEM ADJUSTMENT
Refer to Figure 4 --- 1. Before starting the c ompres -
sor, but with power applied, press the PROG pad
on the Supervisor panel three times to enter the
PROGRAMMING mode. Continue pressing the
PROG pad until “MAX PRESS P2A” is displayed.
Use the cursor (UP arrow) pad to set the desired
UNLOAD pressure (110 psig [7.6 bar]). Note that
pressing the pad for over 2 seconds will initiate fast
scrolling of the value being set.
Once the correct value is selected, press the PROG
pad to proceed to the display “PRES DIF P2A”. This
value is used to set the LOAD pressure where the
compressor will begin building pressure (10 PSID
[0.7 bar]). This will provide LOAD/UNLOAD opera-
tion at 100 to 110 psig [6.7 to 7.6 bar]). These val-
ues will be entered when the display is returned to
operating mode condition by continuing to press
PROG through the end of the PROGRAMMING
menu or allowing the display to automatically re-
turn to operating mode status after 5 seconds of in-
activity . While scrolling with the PROG pad, all exist-
ing user programmable values will be displayed.
4.10 MESSAGE DISPLAY DEFINITIONS
In addition to programming prompts, the 20---char-
acter electro---luminescent display provides in-
formation regarding machine status and trouble
conditions. These messages can be displayed in
any one of five languages; English, French, Span-
ish, German or Italian. The following table explains
what each message means as it relates to the com-
pressor.
MESSAGE DISPLAY DEFINITIONS
MACHINE STATUS MESSAGES EXPLANATION
MANUAL SHUTDOWN The machine is ready to be started. Machine
control is powered up; permissives are made;
machine has been stopped via the ON/OFF
pad, the remote start/stop contact (if the
RUNNING LED is flashing), or a computer com---
mand through the RS232 port.
STANDBY The machine is in AUTOMATIC mode and a
start was initiated, but either the line pressure
P2 is higher than the LOAD setpoint or sump
pressure P1 is higher than 14.5 psig (1 bar).
Machine start will occur when these pressures
are satisfied.
ON L OAD The compressor is running and P2 is less than
the UNLOAD setpoint. The LOAD/UNLOAD
solenoid valve relay (output J10/50---51) is en---
ergized. The compressor is attempting to meet
the system air demand.
OFF LOAD The compressor is running and P2 has exceed---
ed UNL OAD setpoint, but has not dropped
below the LOAD setpoint (DIFF PRESS P2). The
UNL OAD solenoid valve relay is deenergized
and the compressor is unloading.
STOP MODE The machine is in AUTOMATIC mode and a
stop command has been initiated either via
the ON/OFF pad or the remote STOP/START
contact (J1/1---2). This mode runs the com---
pressor for 10 seconds with the LOAD/UNLOAD
valve relay deenergized before stopping.
To Next Page
Loading...
