APC BC300 manual Alarms and Events

		Alarms and Events
	Table 5: Possible Alarms
Mains is out of	The utility (AC input) voltage is too	If possible, restore AC input
tolerance (This	high or too low, so the unit	power to the UPS. If AC input is
alarm occurs	transfers to battery operation. If	available to the UPS, ask an
during a power	AC input returns to normal, the	electrician to make sure that 1)
outage)	unit transfers back to normal	the correct input voltage is
	operation. If not, the unit continues	available to the UPS, and 2) this
	to run on battery until the “Low DC	voltage is within a range the UPS
	shutdown” alarm occurs. Then, if	will accept.
	bypass voltage is within the range
	programmed into the UPS, the unit
	transfers to bypass. If not, the unit
	transfers to stand-by and does not
	supply output voltage.
OFF Button	A user pushed the red “Off” button	Restart the unit by pressing the
Pushed (If the	or activated an emergency power	green button inside the door. If
alarm was	off shutdown. The unit switches to	the unit will not restart, the
caused by the	stand-by mode and does not supply	alarm was caused by an
Off button, it is	output voltage.	emergency power off (EPO)
in the events		shutdown. Find out why this
log)		shutdown was activated and
		make sure the emergency
		situation has passed; then,
		restart the unit by deactivating
		the emergency power off
		shutdown.
Output freq. is	The output frequency is too high,	Ask an electrician to make sure
out of tolerance	low, or unstable (out of tolerance).	that the correct input frequency is
	The unit transfers to battery	being supplied to the UPS. Then,
	operation and runs on battery until	call APC Global Service.
	the “Low DC shutdown” alarm
	occurs. Then, the unit transfers to
	bypass if bypass is within
	tolerance. If not, the unit transfers
	to stand-by and does not supply
	output voltage.
Output is	The output voltage was	If other alarms are also active,
moment. out of	momentarily too high or too low	troubleshoot these alarms first. If
tolerance	(out of tolerance). If bypass is	this is the only alarm, call APC
	within tolerance, the unit transfers	Global Service.
	to static bypass operation. If not,
	the unit transfers to stand-by and
	does not supply output voltage.

990-1403

18 User Guide APC BC300 Series 40kW 208/450/480V UPS