American Power Conversion 450 LEDs and Audible Alarms, On Battery, Overload, Replace Battery

LEDs and Audible Alarms

The on-line LED illuminates when the UPS is supplying utility power to the loads.

On Battery

During on-battery operation, the on-battery LED illuminates and the UPS sounds an audible alarm consisting of four beeps every 30 seconds. The alarm stops when the UPS returns to on-line operation.

Overload

When the UPS is overloaded (when the connected loads exceed the maximum specified in the “maximum load” listed in Specifications, page 9.), the overload LED comes on and the UPS emits a sustained tone. The alarm remains on until the overload is removed. Disconnect nonessential load equipment from the UPS to eliminate the overload.

Replace Battery

If the battery fails a self-test, the UPS emits short beeps for one minute and the replace battery LED illuminates. The UPS repeats the alarm every five hours. Perform the self-test procedure to confirm replace battery conditions. The alarm stops when the battery passes the self-test.

Function			LED		Tone
UPS is on	•	m	•	•	—
UPS is running on battery	m	•	—	—	4
UPS is performing self-test	m	X	•	•	—
Overload	—	—	m	—	1
Overload shutdown	—	—	m	—	1
Output short circuit	—	—	m	—	1
Transformer failure	—	—	m	—	1
Low Battery (while on battery)	m	—	—	—	1
Replace battery condition	—	—	—	m	2
Battery disconnected in self test	•	•	•	•	3
UPS internal alarms:
boost/trim failure	X	X	•	•	1
transfer relay weld	X	X	X	X	1
sleep mode	—	X	X	—	—

		Key:
LED		Tone
— = irrelevant to condition	— = irrelevant to condition
m = on steady	1	= sustained tone
X = flashing	2	= 1 minute of beeping every 5 hours
• = Off	3 = fading tone
	4	= 4 beeps every 30 seconds

990-5022A, Revision 2 6/99 6