EPACO USER’S MANUAL
Page: 6 P/N E06-091 (Rev 0) Release Date: January, 2010
2.1.2 EPC DIAGNOSTICS
In addition to the EPC’s three system status LEDs, an integral buzzer is provided to assist in diagnosing
problems with the system. The following table identifies how the LEDs and buzzer will operate in response to
expected system events.
Power
LED
on
on
on
on
on
on
on
on
on
on
on
on
on
Piezo
off
long-short
pulse
short-short
pulse
long
pulse
off
on not
latched
off
on
off
on
off
on not
latched
off
Trouble
LED
on
on
on
blink slow
off
on latched
on
on (1)
on
on
off
on latched
no change
Trouble
Relay
De-energized
De-energized
De-energized
De-energized
Energized
De-energized
latched
De-energized
De-energized
(1)
De-energized
De-energized
Energized
De-energized
latched
no change
Alarm Relay
De-energized
De-energized
De-energized
Energized
Energized
Energized
Energized
De-energized
Energized
Energized
Energized
Energized
no change
Alarm LED
off
slow blink
off
off
off
off
off
on
on
on
fast blink
off
off
Condition
Initial power up [first 4 seconds]
Power up in an alarm state
Invalid configuration or
Prevent restart after activation
Initializing [follows initial power up]
Normal State
Trouble State
Disabled State
Alarm State
Disabled State & alarm
Return to Armed from previous state
1st alarm in AND configuration
[cross zoned]
Warning pressure level
PC mode
(1) Trouble relay and LED following trouble condition on series firing output due to release action.
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