Liebert 30-130kVA manual Excess load from the UPS and attempt to

Operation

Table 7	Alarms, functions, and corrective actions (continued)
Actual
Alarm/fault
Name
Displayed		Description	Fault
On Front		of Alarm/	Or	Latch	Dial	Freeze	Event Log
Panel		Fault	Alarm	Mask	Mask	Mask	Mask	Meaning and Corrective Action(s)
								With the load on UPS, at least one phase of
								the UPS KVA or KW has exceeded the
								rated KVA, KW, or RMS current vs. Time
								equation. (Note: This fault would have been
								preceded by an “Inverter Overload Phase x
Inverter Ovld		Inverter						alarm.) The UPS will transfer the load to
		Overload	Fault	YES	YES	YES	YES	Static Bypass if it is available. If the fault or
xfer
		Transfer						overload clears the UPS will automatically
								transfer from SBS to UPS. Remove the
								excess load from the UPS and attempt to
								re-start. If the load is below the rating of the
								UPS and it will not re-start, contact Liebert
								Global Services.
								One or more Output Fuses are open.
								(because of capacitance in the system it
Inverter Fuse		Inverter Fuse						may take up to 1 minute after a fuse failure
			Fault	YES	YES	NO	YES	to detect this fault). The system will transfer
Fail		Fail
								the load to Static Bypass if available and
								then shut down the UPS. Contact Liebert
								Global Services Immediately.
								The UPS module output voltage is above
								the maximum (+10%) deviation from
Output Ov		Output						nominal. The load automatically transfers to
		Overvolt	Fault	NO	YES	YES	YES	the bypass line. The UPS module is shut
xfer
		Transfer						down and isolated. Contact Liebert Global
								Services at once. Do not attempt to reset
								circuit breakers.
								The UPS module output voltage is under
								the minimum (-12%) deviation from
		Output						nominal. The load automatically transfers to
Output Uv								the bypass line. If the alarm condition is no
		Undervolt	Fault	NO	YES	YES	YES
xfer								longer present, reset the alarm and
		Transfer
								retransfer the load from bypass to UPS.
								Contact Liebert Global Services if alarm
								persists.
								This fault can only be detected when the
								load is on bypass. One or more of the Static
SBS SCR		SBS SCR						Bypass phases are open. The static switch
			Fault	YES	YES	NO	YES	will be shut down and the UPS will shut
Open		Open
								down. Power to the load will be lost.
								Contact Liebert Global Services
								Immediately.
								The system has detected a shorted SCR in
								the Bypass line. If the unit is in the start-up
								mode, start- up will be inhibited. If the unit is
SBS SCR		SBS SCR	Fault	YES	YES	NO	YES	on UPS, the unit will transfer to Bypass and
Shorted		Shorted						open the output contactor to prevent back
								feed to the inverter from the Bypass line.
								Contact Liebert Global Services
								Immediately.

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