If it's a "Cold Start" 015 I think, you'll have to learn the hoistway, validate the floors and openings front and rear, set the parameters for fire service if applicable, maybe even do learn runs on the doors too. Wow, now that I'm thinking about it, slowdown count... I think the car forgets everything on a 015 error. Hope you have access to the DMC hand book.
Rodney's right in that even with a dead battery the tool will still communicate. Maybe the power supply in the COP is cooked? 5 and 12 volts are present at that P/S? And...is the red LED lit on the CLC a card?