Unit beeps 4 times every 2 minutes or so. the green light is off and the offline (amber light) is on. unit as new batteries. Unit is about 3 1/2 years old, it's been great till about 4 days ago. Thanks JM
Check if the unit has a breaker on the back and reset it. The unit doesn't seem to be getting power.
SOURCE: hace a APC XS 900 that said battery needs
disconnect one terminal of the battery then measure charging voltage betwen +ve and -ve it should be 13.8vdc for one 12v battery if charging voltage is not present then battery is ok then connect ammeter to measure the current in Ampere .take care it should be in series if current if no current then battery must ok opern the ups there is a charger transformer measure i/p voltage to transformer if not present then check i/p path if present then check diodes at o/p of charger if faulty replace it also check capacitor and regulator ic if faulty replace it your problem must be solved
Testimonial: "There is no way to check the water in the batteries as thry are sealed. I found out that after a load is applied it goes on battery for a few seconds "
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