Sullair LS20TS, Operator'S Manual And Parts List

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Section 2
DESCRIPTION
22
2.11 LAMP INDICATORS
Embedded into the front panel schematic of the
compressor are several lamps. Pressing the lamp
test key will light all the lamps for 3 seconds. Each
LED lamp has the following purpose.
P1 - (Line pressure) If lit steady, signifies that P1 is
being displayed, if flashing denotes the presence of
an alarm.
P2 - (Sump pressure) If lit steady, signifies that P2
is being displayed, if flashing denotes the presence
of an alarm.
P3 - Injection oil pressure (Pressure after oil filter)
Same as P1 & P2 except for P3.
P4 - (Pressure before oil filter)
dP1 - (Separate differential pressure) If lit steady,
signifies that DP1 is being displayed, if flashing
denotes replacement of separator is needed.
dP2 - (Oil filter differential pressure)
dP3 - (Oil differential pressure)
T1 - (Dry side discharge temperature) If lit steady,
signifies that T1 is being displayed, if flashing
denotes the presence of an alarm.
T2 - (Discharge temperature) If lit steady, signifies
that T2 is being displayed, if flashing denotes the
presence of an alarm.
T3 - (Oil temperature) If lit steady, signifies that T3
is being displayed. For monitoring only.
T4 - (Interstage temperature) If lit steady, signifies
that T4 is being displayed, if flashing denotes the
presence of an alarm.
For T1, T2 and T4, shutdown points are at 255ºF
(124ºC) with a 30 second delay, and 275ºF (135ºC )
immediate.
MOTOR - If flashing, indicates the motor overload
contact has opened.
INLET FILTER - If flashing, indicates that inlet filter
maintenance is needed.
OIL FILTER - If flashing, indicates that oil filter
maintenance is needed.
POWER ON - Lit if 120VAC power is applied to the
Supervisor II.
ON - If lit steady, the compressor is running. If flash-
ing, indicates that the compressor is armed but
stopped because of restart timer not expired,
remote stop or sequence stop. The compressor
may start at any time.
AUTO - If lit steady, the compressor is running and
in auto mode. If flashing, indicates that the com-
pressor is armed but stopped because of restart
timer not expired, remote stop or sequence stop.
The compressor may start at any time.