Welcome to the new Schneider Electric Community

It's your place to connect with experts and peers, get continuous support, and share knowledge.

Close
Important Announcement: WELCOME to the new Schneider Electric Community! Community is now no longer part of Exchange, and is now rebranded under se.com. If you have any bookmarks and links saved, we request you to update them to ensure that you continue accessing our community from this new location. For any issues that you might encounter as part of this change, please reach out to SchneiderCommunity.Support@se.com, and the team will help to get your issues resolved.
Invite a Co-worker
Send a co-worker an invite to the Exchange portal.Just enter their email address and we’ll connect them to register. After joining, they will belong to the same company.
Send Invite Cancel
82472members
350044posts

Smart UPS 1400 not switching to batts correctly

APC UPS Data Center Backup Solutions Forum

Schneider Electric support forum for Data Center UPS, software and services including our APC offers designed to share knowledge, installation, configuration, and general product use.

hadaltech_apc
Cadet
0 Likes
0
61

Smart UPS 1400 not switching to batts correctly

This was originally posted on APC forums on 7/10/2010


Hi -

I picked up an older smart UPS: Model Number SU1400RMNET, main board part number 640-0732P, rev 16.

With no load, the unit power up correctly, goes through self test and charges batteries. I plug in some load (about 500W), cut the input power and the UPS shuts down completely. At very low load, it will try to switch, and eventually get on battery power before shutting down, btu the power to the load drops in the corssover. Sometimes it will switch correctly if there is no load. It will also power up correctly if there is a load attached prior to power up, but again, when cutting input power, it just shuts down.

The batteries are good - they measure good and I've also changed them.

There is no obvious damage to the board, I have checked all the electrolytics and none are shorted. What's the best way to test the relays? I'm an EE so I'm not gonna get myself killed doing this, and with a little info, shold be able to get this thing going again.

Any help appreciated..

Brent

Tags (2)