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

Try new batteries!

wrote:

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




--
Joe Leikhim K4SAT
"The RFI-EMI-GUY"©

"Treason doth never prosper: what's the reason?
For if it prosper, none dare call it treason."

"Follow The Money" ;-P

wrote:

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

perhaps a toasted output transistor, not too hard to check / repace.

NT

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

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