Ring Doorbell 2 only Recognizes Battery connection

I've recently installed a Ring 2 Doorbell, and have it direct-wired to a manual doorbell set (no capacitor required). Unit works fine, however, it only recognizes the Battery Connection and won't report battery use level.I've uninstalled and then reinstalled the entire unit, checked all connection, tested line voltage, everything seems correct. Aside from the unit being defective, is there anything left that I can try?Thanks.