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S1 OF/UF
Source 1 Over Frequency/Under Frequency
The frequency for Source 1 is running outside the acceptable operating range, as set in the Frequency Trip Point under
User Settings. An S1 Fail alarm was also issued and source transfer has been inhibited.
Press SILENCE on the touch screen to turn off the audible alarm, if so configured. If you are accessing the 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.
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
CA and press RETURN on your keyboard.
S1 FAIL
Source 1 Failure
Source 1 has failed due to under voltage (UV), over voltage (OV), or running over or under frequency (OF/UF). This
alarm is a companion to S1 UV, S1 UV (RMS), S1 OV and S1 OF/UF.
The load of the STS2 has been transferred to Source 2.
Press SILENCE on the touch screen to turn off the audible alarm, if so configured. If you are accessing the STS2
system from a terminal, type SH and press RETURN on your keyboard to turn off the audible alarm.
This event has been 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
CA and press RETURN on your keyboard.
S2 UV
Source 2 Under Voltage (fast detection).
The input voltage from Source 2 dropped below a set percentage of the nominal voltage, as set in the Fast UV set
point under the User Settings. An S2 Fail alarm was also issued and source transfer has been inhibited.
The load of the STS2 has been transferred to Source 1.
Press SILENCE on the touch screen to turn off the audible alarm, if so configured. If you are accessing the 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.
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
CA and press RETURN on your keyboard.
S2 UV (RMS)
Source 2 Under Voltage (slow detection).
The input voltage from Source 2 remained below a set percentage of the nominal voltage for a designated period, as
set in the Slow UV Setting and Slow UV Detection Delay set points configured under the User Settings. An S2 Fail
alarm was also issued and source transfer has been inhibited.
The load of the STS2 has been transferred to Source 1.
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Event Message Help Text
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