Machine Behavior After A Power Outage; Remote Stop/Start Input; Brown Out Input - Sullair LS20 Operator's Manual And Parts List

Section 7
TROUBLESHOOTING-SUPERVISOR
7.3 MACHINE BEHAVIOR AFTER A POWER OUT-
AGE
Condition: Machine was in a running or ready con-
dition when power was lost. Table 7-3 below
describes how a machine behaves after a power up
under various conditions if the Restart timer is
greater than 0. If the Restart timer is 0 the machine
powers up in the Manual Stop state.
The Seq. Mode column pertains to the Sequencing
mode parameter. It can be Disabled, set to Remote
Start/Stop or to other sequencing modes (Seq). The
Local/Remote column refers to the Local/Remote
Button on the display panel. The Remote Start/Stop
column pertains to the Remote Start/Stop input. The
Run Mode column the machine run mode (Auto but-
ton on the display panel). Note that this table only
applies if the Restart Timer has a value other than
zero. If the Restart Timer is zero then the machine
always powers up in Manual Stop.

7.4 REMOTE STOP/START INPUT

Table 7-4 below describes how a machine reacts to
Table 7-3 Machine Power Outage Behavior
Seq. Local/
Mode Remote
Disabled xxxx
Disabled xxxx
Remote Local
Remote Local
Remote Remote
Remote Remote
Remote Remote
Remote Remote
Note: 'xxxx' means 'has no effect'.
Table 7-4 Remote Start/Stop Input
Local/ Remote
Remote Start/Stop
Local xxxx
Local xxxx
Remote Off
Remote Off
Remote On
Remote On
36
Remote Run
Start/Stop Mode
xxxx Cont
xxxx Auto
xxxx Cont
xxxx Auto
Off Cont
Off Auto
On Cont
On Auto
Run
Mode Action (State)
Cont Normal Cont Operation
Auto Normal Auto Operation
Cont Remote Stop
Auto Remote Stop
Cont Start if stopped
Auto Normal Auto Operation
the Remote Start/Stop input. See previous table for
column descriptions.
the Sequencing Mode parameter must be set to
Remote to enable Remote Start/Stop input.

7.5 BROWN OUT INPUT

Normally not wired by factory, this feature is used to
enable the compressor to properly recover from
very short-cycle power loss or voltage dips for those
installations that are susceptible to this kind of
power interruption. The controller alone is not as
sensitive to these interruptions as is the switchgear,
and must be told that the loss has occurred.
A normally closed starter contact wired to the
Brownout input (D8) forces the controller into a
standby state if the starter drops out. The controller
will then re-engage the starter after normal start
permissives are satisfied.
Action (State)
Manual Stop
Start after Restart delay & P2 < Load psi, &
P1< 5 psig
Manual Stop
Start after Restart delay & P2 < Load psi, &
P1< 5 psig
Remote Stop
Remote Stop
Start after Restart delay
Start after Restart delay & P2 < Load psi , &
P1< 5 psig