Question about Opti -UPS E-Series 420E (UPS 420E) UPS System

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Charging problem Need schematic

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  • snhssh_1987 Apr 15, 2009

    after charging from long time it does not get charged.and always makes

    a noise with red & orange light

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Posted on May 27, 2009

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Sukam 800VA not charging my battery


Check the charging voltage if you know how to use a multimeter .
if it is 13 volts then it is ok.please tell me how old is your UPS and battery.if the battery is 2-3 years then it may need replacement.
after checking the charging voltage charge the battery or some 6-8 hours promptly maintain charging .

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When batteries discharge during ac power it could indicate charger failure or micro failure or some other wierdness. makers do not release cd info. The best thing is.. buy another one as they can be very difficult to repair and of course they are dangerous, batteries are always live, waiting to bite you. I have worked on and repaired such circuits as the AP 200 series resonant converter and selling and hiring UPS for a long time. Beyond the simple easy checks youhave done the time it takes to understand how they work can better be used.

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1 Answer

UPS Backup


Hi,

Appreciate the direct "Ask Me".

Initially, pls charge the battery outside of the UPS. Thereafter try again. If the unit will perform, it is just that the UPS is not capable of charging the battery from a flat condition since it is normally designed to cutoff below a certain voltage level, say 10.8 volts. In some instances, it could that the comparator circuitry that is responsible for trigerring on/off the inverter when the battery is at a certain level is defective. Due to the absence of a schematic diagram my end, it would rather be difficult to pinpoint the exact part unlike what was available for the Samsung SyncMaster 753S. If you would try to wing it, pls start with fusible resistors, presence of standby voltage (often 24V), charging voltage of >12VDC and a +5 logic voltage/supply. Pls exercise extreme care, the battery terminals have a relatively higher voltage (than 12) with respect to the chassis ground.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards. Thank you for using FixYa.

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1 Answer

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well, the charging voltage is the right one, you may have a problem with charger board, did you check that? tbe 2 big capacitators, maybe you will need to change them, there could be a couple of things, and to be honest i don´t have the circuits sheets, cause i stopped working with powerware.
good luck.

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2 Answers

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