search for: 400ap

I'm new to the list. Hello. I just googled and tried some general news lists. There is hard to compose good question to google, cause shutdown and poweroff are standard ups jobs. Then. I've upgraded some computer Centos 5.3 to Centos 6.1. It is powered with Powercom BNT-400AP ups. A problem is, when I try to start upsdriver - powercom. While connecting to the ups (via ttyS) it (powercom driver) causes ups poweroff. Perfect black-out. UPS is going out. I tried to debug it connecting LCD instead of computer. LCD load is about 15 Watt. And then anything worked perfectly...