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62
PCS100 UPS-I User Manual
7.2 Utility Disconnect Status LEDs
Utility Disconnect Status LEDs show local status information about the Utility Disconnect. This information is
generally not reproduced on the GDM.
Figure 7-12: 900 A Utility Disconnect Status LEDs
LED (Top to
Name
bottom)
LED 1
SCRs Disable
LED 2
No SCR Fault
LED 4
SCR Temp OK
LED 5
Not Used
(900 A UD)
FSB Ready
(2200 A/4200 A UD)
SCRs Disable
LED 1
No SCR Fault
LED 2
SCR Temp OK
LED 4
LED 5
No SCR Short
LED 6
Open FSB
LED 3
FSB Open
LED 7
Condition when LED is illuminated
The SCRs have received a signal from the master controller to
switch off. This only occurs during a discharge.
The SCRs are firing correctly (feedback from SCR firing PCB).
When there is an SCR firing fault this LED will switch off and
event code 93 will be recorded in the event log. When the SCRs
are intentionally disabled by the master during a discharge the
LED will switch off, but no event will be recorded in the event
log.
The SCR heat sink 90°C sensors indicate the heat sink
temperature is less than 90°C. When the sensors indicate over
90°C this LED will switch off and event code 145 will be
recorded in the event log.
LED 5 is not used for small PCS100 UPS-Is with 900A UD.
The FSB is ready to operate. When the FSB is not ready the LED
will switch off and event code 221 will be recorded in the event
log.
LED 1
SCRs Disable
LED 2
No SCR Fault
SCR Temp OK
LED 4
LED 5
FSB Ready
LED 6
No SCR Short
LED 3
Open FSB
LED 7
FSB Open
Figure 7-13: 2200 A and 4200 A Utility
Disconnect Status LEDs
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