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For troubleshooting, call technical assistance at 1-800-237-4567 or [email protected]
21
IO-70064
05/2020
LED Status Indicators
The SPD diagnostic display panel shows the status of each phase of the
SPD with diagnostically controlled green/red LEDs). If a unit is operating
correctly, all of the phase LEDs will be illuminated green. To test the integrity
of the diagnostics for each phase, push the button below the phase LEDs on
the diagnostic display panel. The green LED will turn red and the alarm will
sound, if the alarm is enabled. Releasing the test button will complete the
test; the red LED will turn green and the alarm will shut off.
If an inoperable condition occurs on any phase, the audible alarm sounds
and the corresponding phase LED on the diagnostic display panel is
extinguished and the service light will illuminate. This indicates that the
device needs service by qualified electrical personnel.
The audible alarm can be silenced, until a qualified person is able to
evaluate and service the SPD, by pressing the alarm silence button. The
alarm will silence and the LED above the button will be lit. The red service
LED will continue to be illuminated until the inoperative condition has been
cleared.
Figure 10:
Diagnostic Display Panel
Phase A, B & C:
Green LED indicators—one per phase. Green is good.
Out indicates problem. Every suppression element in this SPD is monitored.
(N-G indicates on Phase A)
Service LED (Red):
LED illuminates in the event of problems. This indicator
is logic-connected to the Phase LEDs. Should a Phase LED go out, the
Service LED will illuminate and the Audible Alarm will sound.
Test:
Tests red Service LED and Audible Alarm, and changes state of Dry
Contacts.
Alarm Silence:
Turns Audible Alarm off. (Alarm is deactivated when the
Silence LED is illuminated.)
Surge Counter Count:
(if equipped) Increments optional surge counter by
one. (+1)
Surge Counter Reset:
(if equipped) Resets optional surge counter to zero.
(0)
Silence
9294_R1
Test
Count
Reset
Surge Counter
Service
Full Protection
When One (1)
LED Per Phase
Is Illuminated.
400 SERIES
Surge Protective Device
ASCO 460/465/480/485 Surge Protective Device (SPD)
Operation