Liebert Series 600T manual Overload Transfer, Module Summary, Alarm, Module N Off Line, Inverter

Table 1		Alarm Messages - Meaning and Corrective Action (continued)
Alarm		Cabinet	Special	Meaning and
Message		Location	Functions	Corrective Action in Brackets [ ]
UPS SYSTEM (Contʼd.)
Overload		SCC	R, S	The UPS output current exceeds the rated system load current. This
		MMU	S	condition causes an alarm only, the UPS does not shut down.
				[Determine cause of the overload. Reduce the load until the overload
				condition is corrected. Reset the UPS alarm.]
Overload Transfer		SCC	D, F, L, S	The load on the UPS has exceeded the current versus time window
				of system overload capacity. The UPS system transfers the load to
				bypass.
				[Reduce the load. If the system does not initiate an automatic load
				retransfer, manually retransfer the critical load from the bypass line
				to the UPS. Reset the alarm.]
Module Summary		SCC	S	An alarm message (see lists in SCC and Module Remote Monitor
Alarm			R (MMU)	Indications and Other Alarms That Activate Summary Alarms in
				3.1.5 - System Configuration Screens) or the watchdog timer has
				activated the Module Summary Alarm.
				[Clear alarm conditions, if possible.]
Module N Off Line		SCC	D	The output circuit breaker of Module N is open. The number N will
			R (MMU)	identify the module (1 through 6).
				[Review active alarms at Module N and clear alarm conditions, if
				possible.]
Inverter		MMU	—	Inverter output is not synchronized with the UPS system critical bus.
Nonsynchronized				This also means the output circuit breaker is open and should not be
				closed until the output is in sync. This condition may correct itself. If
				not, shut down the UPS module and then perform a start-up
				procedure.
				[Contact Liebert Global Services if condition persists.]
Overload		MMU	D, F, L, S	The UPS output current has exceeded 175% of the rated full load or
Shutdown				the overload capacity has been exceeded. The UPS module is taken
				off-line and shut down.
				[Contact Liebert Global Services at once. Do not attempt to reset
				circuit breakers.]
Reverse Power		MMU	D, F, L, S	Excessive reverse power flow from the critical bus into the UPS
				inverter has occurred, probably because of low inverter output
				voltage or a phase mismatch. The UPS module is taken off-line and
				is shut down.
				[Contact Liebert Global Services immediately. Do not attempt to
				reset circuit breakers.]
Inverter Fault		MMU	D, F, S	At least one of the fuses has opened or an inverter fault was
				detected. The UPS module is taken off-line and is shut down.
				[Contact Liebert Global Services immediately. Do not attempt to
				reset the circuit breakers.]
Communication		SCC	S	The COM FAIL status message is as important as an alarm
Failure				message. Refer to 3.1.13 - Alarm and Status Messages.
Battery Cycle		—	D, E	The optional Battery Cycle Monitor can retain information about the
Buffer Warning				last 132 battery discharge events. When the storage buffer
				approaches its capacity, this warning message is broadcast via
				terminal and modem communication channels, and a complete
				listing of all records is sent to the terminal port. The message clears
				after 30 seconds.
Table 1 Abbreviations
D = auto-dial;	L = latches
E = reports only;	R = remote
F = freezes;	S = summary

D* = auto-dial initiated by Auto Transfer to Bypass if load is on UPS when alarm occurs

D# = auto-dial initiated through Module N (1-6) off-line

72	Operation	DISCONTINUED
		PRODUCT