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4. “LINE” : This green light will turn continuously ON whenever connected equipment is receiving
utility-supplied AC power and your APS is set to “AUTO/REMOTE”, meaning that it will
automatically switch to battery power if AC power becomes unavailable. It will flash inter-
mittently when connected equipment is receiving utility power and your APS’s Operating
Mode Switch is set to “CHARGE ONLY” to indicate that the APS’s inverter is OFF and that
the APS will not supply power from its batteries.
5. “INV”: This yellow light will turn continuously ON whenever connected equipment is receiv-
ing battery-supplied AC power. It will flash if the APS does not detect the minimum load nec-
essary to activate the inverter.
6. “LOAD”: When your UPS is receiving utility-supplied AC power, this red light will turn con-
tinuously ON when the APS’s load is between 80% and 110% of capacity, to alert you that the
inverter might not be able to support the load. The light will flash intermittently after the APS’s
inverter shuts down due to a severe overload or overheating. If this happens, turn Operating
Mode Switch OFF. Remove the overload and let the unit cool. You may then turn the APS ON
after it cools.
7. “BATTERY HI/MED/LO”: These three lights will turn ON in several sequences to show the
approximate charge level and voltage of your connected battery bank and alert you to several
fault conditions:
BATTERY CHARGE INDICATION (Approximate)
Indicator Charger Function Battery Level
(LINE ON) (INV ON)
Green Float High Charge
Green & yellow Absorption (50% Done) High/Medium Charge
Yellow Absorption Medium Charge
Yellow & red Bulk (50% Done) Medium/Low Charge
Red Bulk Low Charge
All three lights off Charger Inhibited Very Low Charge
Flashing green Equalizing Charge N/A
Flashing red N/A Low Battery Shutdown
All three lights flash slowly* Excessive discharge; check batteries
All three lights flash quickly** Overcharge; check charger
* Approximately 1/2 second on, 1/2 second off. See Troubleshooting section.
** Approximately 1/4 second on, 1/4 second off. See Troubleshooting section.
Switches, Indicator Lights & Other Features
continued
Indicator Lights
200201192 UL-Listed APS Manual.qxd 5/17/02 12:41 PM Page 12