Liebert 610 manual Alarm messages and corrective actions, AC Input

Operation

Table 4	Alarm messages and corrective actions
Alarm		Special
Message		Functions	Meaning and Corrective Action
AC INPUT
			The rectifier input line voltage is outside of specified limits or the input circuit breaker is
Input fail			opened while the battery circuit breaker remains closed. The battery supplies power to the
			critical load through the UPS inverter. Provide an alternate source of AC power or prepare to
			initiate critical load procedures when battery reserve time is low.
DC BUS
DC Ground		D, L, S	Either the positive (+) or negative (-) DC bus is grounded. No transfer or shutdown occurs.
			Contact Liebert Global Services (1-800-LIEBERT) at once. Do not attempt to locate or repair
Fault
			the fault.
DC Capacitor		D, F, S	At least one DC capacitor fuse has opened. The UPS module is shut down and isolated.
Fuse Blown			Contact Liebert Global Services at once. Do not attempt to reset the circuit breakers.
			The module battery circuit breaker (MBD) is open. This circuit breaker can be opened either
Battery CB			manually or automatically in a UPS shutdown procedure. If the UPS is operating with this
		D, S	breaker open, the critical load is not protected from loss of the utility source power.
Open
			After AC power is restored and the DC bus is at 100% operating voltage, manually close the
			battery circuit breaker so the rectifier can charge the battery.
			The battery is discharging. This occurs whenever the battery supplies power to the load for
			more than 5 seconds because of input power failure, a rectifier problem or an overload
Battery		D, R, S	condition. If the input power or a source of auxiliary power is restored to the UPS module,
Discharging			the UPS automatically returns to normal operation. Watch the battery voltage carefully.
			Reduce the load (begin controlled shutdown) to extend the battery back-up time. Reset the
			UPS alarms after the input power is restored. The message clears after 30 seconds.
Low Battery			The battery voltage is approaching the minimum discharge voltage (approximately
		D, R, S	5 minutes remaining). Complete the controlled shutdown of the critical load. Reset the
Warning
			alarms if the input power is restored before shutdown.
Low Battery		D, F,	The battery voltage has decreased to the minimum discharge value. The UPS module shuts
			down (no power to the critical load) and the battery and input circuit breakers trip open.
Shutdown		L, S
			Perform a UPS system start-up procedure when AC power becomes available.
Battery Over			The measured battery temperature exceeds the customer-defined limit for more than
Temperature		D, S	1 minute. Alarm automatically clears when temperature falls below the limit for more than
(Optional)			1 minute. Determine the overtemperature cause.
Battery			The UPS rectifier/charger is reducing the battery float voltage setpoint to compensate for
Charge		S	elevated battery temperature. The UPS automatically reverts to normal operation when
Compensation			temperature returns below the limit.
(Optional)
DC			The maximum preset value of the DC Bus voltage has been exceeded. The UPS transfers
		D, F,	to bypass and the input and battery circuit breakers trip open. Contact Liebert Global
Overvoltage
		L, S	Services at once. A fault may have occurred within the UPS. Do not attempt to reset the
Shutdown
			circuit breaker.
BYPASS
Load On			The critical load is being supplied power from the bypass line and is therefore exposed to
		D, R	utility power disturbances. Clear all of the alarms before attempting to retransfer the load
Bypass
			from the bypass line to the UPS.
Auto Transfer		D, E, F	The critical load has been automatically transferred to the bypass line. Use the History
			Status screen to determine the cause for the transfer. Clear all of the alarms before
to Bypass
			attempting to retransfer the load from bypass to UPS.
Auto			An automatic retransfer will be initiated when the OK to Transfer condition has been present
Retransfer			for 10 seconds, if the overload has dropped below 100% of the rated load
Primed
			A manual retransfer is required. Either an overload condition has lasted more than
Manual Reset/			5 minutes or no more auto-retransfer attempts are available. Note that this alarm is only
Retransfer			used if auto-retransfer attempts are enabled. Perform a manual retransfer if all necessary
			conditions are present.
D = auto-dial		L = latches
E = logs only		R = remote
F = freezes		S = summary

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

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