Hello everyone, i have the synology DS1512+ and i connect it to the APC Smart-UPS 750 when i check the setting everything fine but when i turn off the plug the DS1512+ never goes to the safe mode even if the UPS reach low battery and it is start peebing every 1 sec. ? what do you thing i miss ? i even try to make is goes to safe mode immedialtely but it is never work ?!