OM AGSD-1 29
Unit States
The unit will always be in one of three states. Transitions between these states occur as
shown below.
Power ON
OFF
PUMPDOWN
AUTO
T1
T4
T2
T3
Unit States
Transitions:
T1 – Transition from Off to Auto requires all of the following:
Unit enabled based on settings and switches.
If unit mode is ice, the ice timer has expired
No unit alarms exist.
At least one circuit is enabled and available to start.
T2 – Transition from Auto to Pumpdown requires any of the following:
Control source is keypad and the unit enable keypad setting is Off.
Control source is BAS and either the remote switch is Off or the BAS command is Off
Control source is switches and the remote switch is Off
Unit switch Q0 is Off.
T3 – Transition from Pumpdown to Off requires any of the following:
All circuits have finished pumpdown and are Off.
A unit alarm is active.
T4 – Transition from Auto to Off requires any of the following:
A manual reset unit alarm is active
All circuits are unavailable to start (cannot start even after any cycle timers have
expired)
The unit mode is ice, all circuits are off, and the ice mode delay is active
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