Vertiv™ | Liebert
®
STS2
™
100-1000A, 50/60Hz User Manual | Rev. 12 | 11/2017 124
CB2 (S2) OPEN
Circuit Breaker 2 (for Source 2) Open.
Circuit Breaker 2 is not closed.
Check that the Circuit Breaker 2 switch is in the desired position.
Press SILENCE on the touchscreen to turn Off the audible alarm, if so configured. If you are accessing the Liebert STS2
system from a terminal, type SH and press RETURN on your keyboard to turn Off the audible alarm.
This event was written to the Event Log, if so configured.
If configured to be a latching alarm, press RESET on the display. If you are accessing the unit from a terminal, type
CA and
press RETURN on your keyboard.
CB4 (S1 BYP) CLOSED
Circuit Breaker 4 (Source 1 Bypass Breaker) Closed.
Circuit breaker 4 is not open. The input from Source 1 is bypassing the static transfer switch.
Press SILENCE on the touchscreen to turn Off the audible alarm, if so configured. If you are accessing the Liebert STS2
system from a terminal, type SH and press RETURN on your keyboard to turn Off the audible alarm.
This event was written to the Event Log, if so configured.
If configured to be a latching alarm, press RESET on the display. If you are accessing the unit from a terminal, type
CA and
press RETURN on your keyboard.
CB5 (S1 BYP) CLOSED
Circuit Breaker 5 (Source 2 Bypass Breaker) Closed.
Circuit breaker 5 is not open. The input from Source 2 is bypassing the static transfer switch.
Press SILENCE on the touchscreen to turn Off the audible alarm, if so configured. If you are accessing the Liebert STS2
system from a terminal, type SH and press RETURN on your keyboard to turn Off the audible alarm.
This event was written to the Event Log, if so configured.
If configured to be a latching alarm, press RESET on the display. If you are accessing the unit from a terminal, type
CA and
press RETURN on your keyboard.
CB3 (OUTPUT) OPEN
Circuit Breaker 3 (Output breaker) Open.
Circuit breaker 3 is not closed. This circuit breaker is assigned to the output load. The power flow to the load cannot flow
through the static transfer switch.
Press SILENCE on the touchscreen to turn Off the audible alarm, if so configured. If you are accessing the Liebert STS2
system from a terminal, type SH and press RETURN on your keyboard to turn Off the audible alarm.
This event was written to the Event Log, if so configured.
If configured to be a latching alarm, press RESET on the display. If you are accessing the unit from a terminal, type CA and
press RETURN on your keyboard.
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