Re: Powerware 9120 Online UPS
Hi just repaired a Powerware 9120 700VA that was showing 'DC BUS FAULT'.
At first I pulled C14 and others ( C10, C40 C42 & C48 as they are in close prox. to heat sources )
I measured the capacitance of the pulled caps, But the were all within 10-15% of there rating. So I though bummer this is not going to be easy as I don't have an ESR meter.
But then I found this video [URL="https://www.youtube.com/watch?v=115erzCCxgE"]"#135: Measure Capacitor ESR with an Oscilloscope and Function Generator"[/URL]...
morphis
New Member
Last Activity: 12-06-2015, 10:29 PM
Joined: 08-26-2015
Location: Adelaide
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Re: Powerware 9120 Online UPS
Hi just repaired a Powerware 9120 700VA that was showing 'DC BUS FAULT'.
At first I pulled C14 and others ( C10, C40 C42 & C48 as they are in close prox. to heat sources )
I measured the capacitance of the pulled caps, But the were all within 10-15% of there rating. So I though bummer this is not going to be easy as I don't have an ESR meter.
But then I found this video [URL="https://www.youtube.com/watch?v=115erzCCxgE"]"#135: Measure Capacitor ESR with an Oscilloscope and Function Generator"[/URL]...Leave a comment:
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