This is another freebie I found recently. It came with 2 12V 9AH batteries that are not completely dead. It seems they still have ~1/3 of their initial capacity.
The UPS works, but displays “DC bus fault” the first time it starts. I looked around and it is probably cap related:
http://oh2mp.ham.fi/misc/powerware9120/english.html
http://www.fixya.com/support/t133894..._fault_problem
I tested every capacitor on it and only the C14 = 100 uF 63V Jamicon TK is bad (capacity: 103uF, esr: 28).
1) Do I need to change the other cap mentioned in the links?
It is a Chemicon SME 2200 uF 16V with capacity: 2400uF and esr: 0.04-0.06, tested on circuit (datasheet)
Is Chemicon SME a reliable series?
2) Can I replace the Jamicon TK 100 uF 63V with Rubycon YXF 100uF 63V?
The UPS works, but displays “DC bus fault” the first time it starts. I looked around and it is probably cap related:
http://oh2mp.ham.fi/misc/powerware9120/english.html
http://www.fixya.com/support/t133894..._fault_problem
I tested every capacitor on it and only the C14 = 100 uF 63V Jamicon TK is bad (capacity: 103uF, esr: 28).
1) Do I need to change the other cap mentioned in the links?
It is a Chemicon SME 2200 uF 16V with capacity: 2400uF and esr: 0.04-0.06, tested on circuit (datasheet)
Is Chemicon SME a reliable series?
2) Can I replace the Jamicon TK 100 uF 63V with Rubycon YXF 100uF 63V?
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