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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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Smart UPS 1400 - Indicates overload on self-test
Upon power-on, the unit runs thru a series of beeps and buzzes (normal,
as I recall), then the overload indicator lights up and the unit beeps continually. Is the unit toast, or is there a relatively painless fix? Thanks. ----dale |
#2
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Smart UPS 1400 - Indicates overload on self-test
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#3
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Smart UPS 1400 - Indicates overload on self-test
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#4
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Smart UPS 1400 - Indicates overload on self-test
wrote in message oups.com... Upon power-on, the unit runs thru a series of beeps and buzzes (normal, as I recall), then the overload indicator lights up and the unit beeps continually. Is the unit toast, or is there a relatively painless fix? Thanks. ----dale I've worked on one of these. First off, APC is NO HELP whatsoever, they do not, will not, give out any technical info. The extent of their "technical service" is a trade-in program whereby you donate your slightly damaged unit to them and they sell you a brand new unit for nearly full price. They guise this as "protecting their proprietary technology" even if you're trying to fix a unit that's 20 years old. Check your output transistors... they are likely 60A N-channel enhancement mode mosfets and they ain't cheap. The unit I worked on smoked 8 out of 16 of them. They are riveted to 4 heatsink plates and soldered to the board. Be REAL careful removing them as the tiny hair-like board traces tend to like to come with them. Dave |
#5
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Smart UPS 1400 - Indicates overload on self-test
wrote in message
oups.com... Upon power-on, the unit runs thru a series of beeps and buzzes (normal, as I recall), then the overload indicator lights up and the unit beeps continually. Is the unit toast, or is there a relatively painless fix? Thanks. ----dale I picked up a new battery last week from Chris Ewert, president of Uninterruptible Solutions. http://www.uninterruptiblesolutions.com/ In my conversation, I asked him what were the 3 most often seen problems with the UPS units he repairs and refurbishes (he has seen thousands of APC and other UPS units) In order of most seen, failures or other problems: 1. Bad batteries. Lead acid cells are really only good for about 3 years - but that can vary considerably depending on environment (and batch of batteries) 2. Inverter circuit failure. Can be repaired - but have to look for other components that may have also failed OR changed in value (like resistors) -- and then fail a few months later. 3. Battery charger circuit failure |
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