This is funny. We have been getting a 147 "Z Axis Overtravel" alarm during the summer since we bought our VF3 in 2006. I found out the door fan didn't work last summer. The door fan was ok.....but the board the fan plugs into had no voltage on that leg. So I used another open plug on the board for accesories and the fan works now. And I thought that was the problem. No alarms over the winter.
But today it was real hot and it started again.....I opened the cabinet door and put a fan.....No alarm!........So if it's getting hot, why would it trigger a 147 "Z Axis Overtravel"?.......I guess I can put another fan in the door. Two fans might fix the problem?......Any ideas?
The service guy checked the Z cable last year and says its good.