CyberPower CP1350PFCLCD displayed fault code F03, indicating a failure of the charging circuit. Batteries were run down to 8.5 volts, they are known good used batteries that work fine in another UPS. The batteries charged back up to ~12.8 volts just fine outside the UPS, using my car battery charger.
I opened up the case to get a look at the board, and found at one cap clearly blown out. Looks like the glue at the base of the cap aged and become conductive? There's more of the same glue in other spots. I plan to clean all that off, and then replace all the electrolytic caps.
What else should I test?
I opened up the case to get a look at the board, and found at one cap clearly blown out. Looks like the glue at the base of the cap aged and become conductive? There's more of the same glue in other spots. I plan to clean all that off, and then replace all the electrolytic caps.
What else should I test?
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