Basic Introduction; Keypad; Status Displays - Sullair LS-25 Operator's Manual And Parts List

6.1 BASIC INTRODUCTION

Refer to Figure 6-1. The Supervisor has a two line
display to show temperature, pressure and status.
It has a keypad for operating the compressor, pro-
gramming the control points and selecting displays.
There is a graphic illustration with lamps that light
to show the item being displayed. The lamps flash
if that component is in an alarm condition.

6.2 KEYPAD

The keypad is used to control the machine as well
as display status and change setpoints. Refer to
figure 6-1 for following key descriptions.
• Stop - Used to put the machine into manual stop.
It is also used to clear alarm conditions.
• Continuous - Starts machine if no alarm condi-
tions are present. Also used to clear alarm condi-
tions while machine is running.
• Auto - Starts machine and selects auto mode if no
alarm conditions are present. Also used to clear
alarm conditions while machine is running.
• Display - Used to display pressures, temperatures
and other status information (See section on STA-
TUS DISPLAYS).
• Logo - Used for various functions described in
later sections.
• Program - Used to enter the parameter change
mode where control parameters may be displayed
and changed (See PARAMETER SETUP).
• Up arrow - Used in status displays to change dis-
plays and in parameter setup mode to increment a
value.
• Down arrow, lamp test - Used in status displays to
change displays and in parameter setup mode to
increment a value. When in the default display the
key will light all the lamps for three seconds.

6.3 STATUS DISPLAYS

By default the line pressure (P2) and discharge
temperature (T1) are shown on the bottom line of
the display, and machine status on the top line.
The following are the various machine status mes-
sages that indicate the state of the compressor:
(Display graphics shown below.)
• STOP - Compressor is off.
• STANDBY - Compressor is off but armed to start.
This state may be entered because of a power up,
or the unload timer had expired and stopped the
machine. NOTE : The machine may start at any
time.
• STARTING - Machine is trying to start.
• OFF LOAD - Machine is running and off loaded.
• ON LOAD - Machine is running and loaded.
• FULL LD - Machine is running and fully loaded in
SEQUENCE mode.
• RMT STOP - Compressor is off but armed to start.
The machine will start when the remote start con-
tact is closed. NOTE: the machine may start at any
time.
• SEQ STOP - Compressor is off but armed to start.
The machine will start when the sequencing condi-
tions meet the criteria to start. NOTE: the machine
may start at any time.
This default display appears as follows:
If there are alarms active they will alternately be
shown with the default display. The machine status
will be displayed for two seconds then the alarms
for two seconds each. For example:
Section 6
SUPERVISOR
STOP
110 180
T1 HI
110 180
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