Liebert PDUTM Maintenance Manual Download

Page: 142 / 156

Event Message Help Text

134

LOAD ON ALT SOURCE

STS2/PDU load on the alternate source.
The Static Transfer Switch 2 Power Distribution Unit is running on the alternate power source. Check the Event
Log to determine the reason for the transfer from the preferred source.
Another event has caused the system to transfer to the alternate source. The system returns the load to the
preferred source either automatically or manually, depending on how the system is configured.
In automatic reset mode, the STS2/PDU automatically retransfers to the preferred source after the causal con-
dition clears.
In manual reset mode, the system remains on the alternate source after the causal event clears until you select
RESET from the touchscreen or enter CA (Clear Alarms) from a service terminal.

Press SILENCE on the touch screen to turn off the audible alarm, if so configured. If you are accessing the
STS2/PDU system from a terminal, type

and press RETURN on your keyboard to turn off the audible

alarm.
This event was written to the Event Log, if so configured.
The alarm has triggered a message to be sent to the modem, if so configured.

AUTO REXFER INHIBIT

Automatic Retransfer Inhibited.
The system made five transfers from the preferred source to the alternate source in the last five minutes. As a
result, automatic retransfers back to the preferred source is now disabled.
To clear this alarm condition, assign the alternate source as the preferred source.
This alarm also is cleared if the unit transfers to the preferred source due to an alternate source AC volt failure
(i.e., an emergency transfer.)
Press SILENCE on the touch screen to turn off the audible alarm, if so configured. If you are accessing the
STS2/PDU system from a terminal, type

and press RETURN on your keyboard to turn off the audible

alarm.
The event was written to the Event Log, if so configured.
The alarm has triggered a message to be sent to the modem, 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

and press RETURN on your keyboard.

CB1 (S1) OPEN

Circuit Breaker 1 (for Source 1) Open
Circuit Breaker 1 is not closed. CB1 is only assigned to Source 1.
Check that the Circuit Breaker 1 switch is in the desired position.
Press SILENCE on the touch screen to turn off the audible alarm, if so configured. If you are accessing the
STS2/PDU system from a terminal, type

and press RETURN on your keyboard to turn off the audible

alarm.
This event was written to the Event Log, if so configured.
The alarm has triggered a message to be sent to the modem, 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

and press RETURN on your keyboard.

NOTE

Pressing the RESET button returns the unit to the preferred source. Ensure that the condition

that triggered the switch has been rectified before returning to the preferred source.