Section 6
OPERATION- SUPERVISOR II
33
abled the compressor will not try to start after a pow-
er up. If this time is setto avalue, the machine willgo
into standby after power up. When the line pressure
drops below the load setpoint, the restart timer will
start timing. When the timer expires the machine will
start.
SEQUENCING MODES
The following is a brief description of sequencing
modes. For details see the Supervisor II Sequenc-
ing & Protocol Manual (See Recommended Spare
Parts List)
.
S
DISABLED
-- Responds to status and pa-
rameter change messages via the RS485
network but will not respond to start, stop,
load or unload messages.
S
REMOTE
-- Responds to status and pa-
rameter change messages but will not re-
spond to start, stop, load or unload mes-
sages. The remote inputs and outputs are
enabled(start/stop, load/unload, master/lo-
cal).
S
SLAVE
-- Willrespond to all messages, but
will not start or load unless commanded to
do so by a message. This mode is used to
control the machine from a master comput-
er.
S
HOURS
-- Sends status message about
once a second; starts, loads and unloads
machines based on sequencing hours.
S
COM ID #
-- Sends status message about
once a second; starts, loads and unloads
machines based on machine COM ID#.
6.8 PURPOSE OF CONTROLS - SUPERVISOR II
CONTROL OR INDICATOR PURPOSE
EMERGENCY STOP SWITCH Pushing in this switch, found adjacent to the Supervi-
sor, cuts all AC outputs from the latter and de--ener-
gizes the starter. A fault message (E STOP) is dis-
played by the Supervisor until the button is pulled out
and the “
O
” pad is depressed.
DISCHARGE TEMPERATURE PROBE--T1 Shuts the compressor down whenthe compressor dis-
charge temperature exceeds 240
_
F(116
_
C). Continu-
ally monitors air/fluid mixture discharged from the
compressor unit.
AIR END DISCHARGE PRESSURE--P1 Shuts the compressor down when the compressor dis-
charge pressure exceeds P1 MAX. Continually monitors
the discharge pressure of the compressor unit. Indicates
pressure in compressor sump upon start--up to verify ro-
tor motor rotation.
PACKAGE OUTLET PRESSURE--P2 Continually monitors service line pressure. When line
(Service Line Pressure) pressure reaches the UNLOAD setting, the Supervisor
control signals the solenoid valve to unload the compres-
sor.
FLUID PRESSURE--P3 Continually monitors injection fluid pressure and shuts
down the compressor in the event of low fluid pressure.
FLUID FILTER DIFFERENTIAL SWITCH Continually monitors fluid filter differential and generates
an alarm when the fluid filter needs replacement.
INLET FILTER MAINTENANCE SWITCH Monitors condition of compressor inlet air filter and indi-
cates when replacement is required.
FLUID LEVEL SIGHT GLASS Indicates fluid level in the sump. Proper level is not to
fall below the center of the sight glass. Check level
when compressor is shut down.
DO NOT OVERFILL.
COOLER BYPASS VALVE Regulates flow of fluid to and around the cooler. De-
signed to maintain a minimum operating temperature of
180
_
F(82
_
C); used for fast warm--up on start--up.
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