EDWARDS SYSTEMS TECHNOLOGY EST3 - Page 95

Operation sequence charts
EST3 System Operation Manual B.5
Table B-9: Trouble Sequence - Annunciation
EventØ
3-LCD DisplayÚ
Normal
First
Trouble
First Alarm
w/Active Trouble
Notes
Off Premise Module
(3-OPS)
3 circuit configuration
All
circuits
normal
polarity
Trouble circuit
reverses polarity,
module trouble
relay operates
Alarm and trouble
circuits reverse
polarity
Off Premise Module
1 circuit configuration
Normal
polarity
Circuit opens,
(module trouble
relay operates)
Circuit reverses
polarity (trouble
relay restores)
Alarm has priority
Auxiliary Control
Relays
Off On as
programmed
On as programmed
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