American Power Conversion 500 VA Replace BATTERY/BATTERY Disconnected LED is Illuminated

PROBLEM AND/OR POSSIBLE	SOLUTION
CAUSE
THE OVERLOAD LED IS ILLUMINATED AND THE UPS EMITS A SUSTAINED ALARM TONE
The UPS is overloaded. The	The connected equipment exceeds the specified “maximum load.”
connected equipment is draw-	The alarm remains on until the overload is removed. Disconnect nonessen-
ing more VA than the UPS can
	tial equipment from the UPS to eliminate the overload.
sustain.
	The UPS continues to supply power as long as it is online and the circuit
	breaker does not trip; the UPS will not provide power from batteries in the
	event of a utility voltage interruption.
	If a continuous overload occurs while the UPS is on battery, the unit turns
	off output in order to protect the UPS from possible damage.
THE REPLACE BATTERY/BATTERY DISCONNECTED LED IS ILLUMINATED
This LED flashes and a short	Check that the battery connector on the rear panel is fully engaged.
beep is emitted every two sec-
onds to indicate the battery is
disconnected.
Weak battery.	Allow the battery to recharge for 24 hours. Then, perform a self-test. If the
	problem persists after recharging, replace the battery.
Failure of a battery 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 after the battery has charged for 24 hours to confirm the
	replace battery condition. The alarm stops and the LED clears if the battery
	passes the self-test.
THE SITE WIRING FAULT LED ON THE REAR PANEL IS ILLUMINATED (120V MODEL ONLY)
The UPS is plugged into an	Wiring faults detected include missing ground, hot-neutral polarity reversal,
improperly wired utility power	and overloaded neutral circuit.
outlet.	Contact a qualified electrician to correct the building wiring.
THE INPUT CIRCUIT BREAKER HAS TRIPPED
The UPS is overloaded. The	Reduce the load on the UPS by unplugging equipment. Press in the plunger
plunger on the circuit breaker	on the circuit breaker.
has popped out.
THE AVR BOOST OR AVR TRIM LEDS ARE ILLUMINATED
The system is experiencing	Seek qualified service personnel to check your facility for electrical prob-
excessive periods of low or	lems. If the problem continues, contact the utility company for further as-
high voltage.	sistance.
UPS OPERATES ON BATTERY ALTHOUGH UTILITY VOLTAGE EXISTS
The UPS input circuit breaker	To reduce the load on the UPS, unplug equipment and press in the plunger
has tripped.	on the circuit breaker.
The line voltage is very high,	Move the UPS to a different outlet on a different circuit, as inexpensive fuel
low or distorted.	powered generators may distort the voltage. Test the input voltage with the
	utility voltage display (see Operation). If acceptable to the connected
	equipment, reduce the UPS sensitivity (see User Configurable Items).

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