Schematic or service manual for SOLA 325 UPS

[Sylvia Else]

My longserving SOLA 325 UPS suddenly quit yesterday. Other than a relay
that switches when power is supplied, it appears completely dead.

Anyone have a sevice manual, or schematic, for this model?

Or ideas? Normally, my first thought would be that its PSU had failed,
but it has batteries as backup!

Thanks

Sylvia.

 

[Jean-Christophe]

My longserving SOLA 325 UPS suddenly quit yesterday.
Anyone have a sevice manual, or schematic, for this model?

http://www.eserviceinfo.com/download.php?fileid=19986

 

[Sylvia Else]

http://www.eserviceinfo.com/download.php?fileid=19986

Thanks, but that appears to be from the 305 model, which seems to be
different.

In the mean, time I've discovered that the reason it's completely dead
even on battery is that the 40A fuse to the battery has blown.
Disconnecting the large transformer and shorting out the fuse allows the
display to light, go through its initialisation cycle, and then indicate
a fault.

The failure of the fuse wouldn't explain why the device won't run while
on mains power, so the fuse is presumably a symptom of something else.

Sylvia.

 

[Baron]

Thanks, but that appears to be from the 305 model, which seems to be
different.

In the mean, time I've discovered that the reason it's completely dead
even on battery is that the 40A fuse to the battery has blown.
Disconnecting the large transformer and shorting out the fuse allows
the display to light, go through its initialisation cycle, and then
indicate a fault.

The failure of the fuse wouldn't explain why the device won't run
while on mains power, so the fuse is presumably a symptom of something
else.

Sylvia.

It could just be fatigue !

 

[Jean-Christophe]

Thanks, but that appears to be from the 305 model, which seems to be
different.

Uh, sorry ... not close enough ?

In the mean, time I've discovered that the reason it's completely dead
even on battery is that the 40A fuse to the battery has blown.
Disconnecting the large transformer and shorting out the fuse allows the
display to light, go through its initialisation cycle, and then indicate
a fault.

I strongly suggest that you replace the fuse, because the
unknown fault might make things worse, and you may
blow up the whole unit ( which could solve the problem )

The failure of the fuse wouldn't explain why the device won't run while
on mains power, so the fuse is presumably a symptom of something else.

Sure it is. Sorry I didn't find the manual.

What is the error/fault message on the display ?

 

[Sylvia Else]

Uh, sorry ... not close enough ?

Seems to be different, though it's useful in showing the likely general
configuration.

I strongly suggest that you replace the fuse, because the
unknown fault might make things worse, and you may
blow up the whole unit ( which could solve the problem )


Sure it is. Sorry I didn't find the manual.

What is the error/fault message on the display ?

"UPS fault" indicated by a continuous beep from the unit.

Given the number of transformer leads that I have unplugged, this is
hardly surprising.

Sylvia.

 

[Jean-Christophe]

Seems to be different, though it's useful in showing the likely general
configuration.











"UPS fault" indicated by a continuous beep from the unit.

Of course ... sounds a bit like Monty Python to me.

Given the number of transformer leads that I have unplugged, this is
hardly surprising.

Since you don't know the cause of the original failure,
are you sure I won't happend again ?

Did a short-circuit occur on the output(s) of this UPS ?

 

[Sylvia Else]

Of course ... sounds a bit like Monty Python to me.


Since you don't know the cause of the original failure,
are you sure I won't happend again ?

I've commented elsewhere in this thread that I've identified a couple of
power switching FETs which are defective. One of them is shortcircuited,
across all three terminals, which would certainly have blown the fuse.

Of course, that just pushes the question down a level - am I sure that
whatever blew the FETs won't happen again. And of course, the answer has
to be no.

These transistors only switch when the UPS is in backup mode. At other
times, they're not switching, but their drains are connected to the
secondary of a transformer that has mains applied to the primary. The
failure could be attributed to a power spike, though I have to note that
the UPS is plugged into a surge arrestor, and nothing else in the house
seems to have suffered.

Did a short-circuit occur on the output(s) of this UPS ?

No.

 

[Rich Grise]

My longserving SOLA 325 UPS suddenly quit yesterday. Other than a relay
that switches when power is supplied, it appears completely dead.

Anyone have a sevice manual, or schematic, for this model?

Or ideas? Normally, my first thought would be that its PSU had failed, but
it has batteries as backup!

Have you asked SOLA?

Good Luck!
Rich

 

[Franc Zabkar]

Of course ... sounds a bit like Monty Python to me.

The OP could interrogate the UPS via its RS232 port using
HyperTerminal:
http://www.networkupstools.org/protocols/sola.html

Unfortunately the status information probably won't tell her anything
useful.

BTW, I would suggest that sci.electronics.repair is probably a better
newsgroup for this type of question than sci.electronics.design.

- Franc Zabkar

 

[Sylvia Else]

Have you asked SOLA?

I've asked the company that took them over. I don't hold out much hope
though. They don't really have an interest in helping people repair old
gear.

Sylvia.

 

[solotech]

solotech had written this in response to
http://www.electrondepot.com/australian/Schematic-or-service-manual-for-SOLA-325-UPS-6713-.htm
:
Try www.acdcmanuals.com.

Cheers.

-------------------------------------
Sylvia Else wrote:
-------------------------------------

My longserving SOLA 325 UPS suddenly quit yesterday. Other than a relay
that switches when power is supplied, it appears completely dead.

Anyone have a sevice manual, or schematic, for this model?

Or ideas? Normally, my first thought would be that its PSU had failed,
but it has batteries as backup!

Thanks

Sylvia.

##-----------------------------------------------#
Delivered via http://www.electrondepot.com
Electronics Enthusiasts' Community of the Ne
Web and RSS access to your favorite newsgroup -
sci.electronics.design,aus.electronics - messages and counting
##-----------------------------------------------##