APC BC300 manual 990-1403

Alarms and Events

Table 5: Possible Alarms

Output is out of	The output voltage is too high or too	If the UPS is in stand-by, restart
tolerance	low (out of tolerance). If the alarm	the UPS by pressing the green
	was caused by high output voltage,	button inside the door. If the UPS
	the unit transfers to static bypass	will not restart, a user may have
	operation if bypass is within	started an emergency power off
	tolerance. If bypass is not within	(EPO) shutdown. Find out if the
	tolerance, the unit transfers to	EPO shut down the UPS; if it did,
	stand-by and does not supply	find out why and make sure the
	output voltage. If the alarm was	emergency situation has passed.
	caused by low output voltage, the	Then, you can reset the EPO and
	unit transfers to static bypass	restart the unit by pressing the
	operation if bypass is within	green button inside the door. If
	tolerance. If bypass is not within	the unit will still not restart, call
	tolerance, the unit transfers to	APC Global Service.
	battery for five seconds and then
	transfers to stand-by and stops
	supplying output voltage.
Overload load is	The unit is loaded with more than	Disconnect equipment connected
over 100%	nominal load on one or more	to the UPS until the load is below
	phases. The UPS status does not	100%. An electrician must
	change until it can no longer	connect these loads to another
	maintain the correct output	power source. If the alarm
	voltage. Then, the unit transfers to	persists, call APC Global Service.
	static bypass operation if bypass is
	within tolerance. If not, the unit
	transfers to battery for five
	seconds; then, it transfers to stand-
	by and stops supplying output
	voltage.
Static switch 1	The temperature on the heat-sink	Find the vents for the UPS fans
temp. shutdown	for the main static switch is higher	and check to see if the fans are
	than the shutdown level, and the	operating. Do not try to open the
	main static switch has opened. The	unit, and do not insert anything
	unit switches to battery operation.	into a fan vent. If the fans are not
	When the temperature falls below	operating, call APC Global
	the shutdown level, the unit	Service. If the fans are operating,
	transfers back to normal operation.	make sure the room temperature
	If the temperature does not fall to	is below 80° F (27° C). If not, cool
	this level before the “Low DC	down the room. if the room was
	Shutdown” alarm occurs, there will	already below this temperature,
	be no output to the load equipment.	call APC Global Service.

	990-1403
User Guide APC BC300 Series 40kW 208/450/480V UPS	19