Re: APC Smart-UPS 1100 Not working flashing Green and Yellow LED'd

I replaced the 5 Relays on the Smart UPS 1100.
No longer does the UPS Flash Both Lights. It now:
Has a different problem.

Now I have a different problem:
1. Initially it goes online
2. Performs a self test.
3. Then goes offline to "On Battery" even though It is still plugged in.
4. Will not go back to OnLine it appears that it does not know it
is plugged in.

I can unplug the UPS then Plug it back in to AC. It acts as if it did...

Re: APC Smart-UPS 1100 Not working flashing Green and Yellow LED'd

Hello Capleaker,
Thank you for your Reply and pointing me
in the right Direction.


I unsoldered the 5 relays,
It Appears that 1 of the Relays is sticky.
It does not release immediately.

I have ordered replacement relays.
Hope this will repair it.

I also found thru google search that
When online and on battery flash simultaneously, this indicates an AVR relay fault

Have APC - Smart UPS 1100
1. Replaced Caps.
2. New Batteries

Issue
Does not return to AC ONLINE
after losing AC - and Mains is restored

Switches to Battery Fine -- Running on Battery fine
As a test , I can unplug the Power Cord to the Unit
(Just say 5 seconds) Short period of time.

When AC is restored
It Shuts down
Flashing the Green ONLINE AC LED
and Flashing ON Battery LED

Users manual only says that the 2 flashing LED indicates
there is an internal Problem....

Re: New Members - please post your introductions here

Found this forum searching for, Schematics for APC Smart-UPS
I have a smart-ups 1100 changed all the caps,
everything appeared to be fixed, But now Operates fine
on AC, Remove AC it switches to Battery.. Everything works fine
But then when AC is restored,
it shuts down.
flashes the green on Line led
and flashes the yellow on battery LED.

I looked up this in the owners manual, all
it says is internal error.

Hoping to find out what the problem...