Rob,
Welcome to TFP... A Great resource for when your equipment is not talking to each other...
It would help to know what pump you have... but, I will assume you have the IntelliFlo VS pump and not the SuperFlo VS pump.
The IntelliFlo is controlled by a serial cable that gets plugged into the pump's control panel. When the cable is attached and the EasyTouch is in the Auto mode (Not Service mode) the pump's display will read "Display Not Active".
If the pump's display does not say Display Not Active, then that is a pretty good indication that the communication buss is not working. If the only thing on the buss is the pump, then it is impossible to tell if the problem is the EasyTouch or the pump. If you have something else on the buss, like ScreenLogic or a SWG and they work, then the problem will not be the EasyTouch's communications buss.
So, step one is to ensure the date cable is connected at the pump and inside the EasyTouch.
Step two is to see if the pump's display reads "Display not Active."
I would also ensure that the EasyTouch knows the type of pump... On the LCD select SETTINGS, IntelliFlo, Pump#1... Under "Speeds" you should see something like the info below...
Pump Type..... VS
RPM.............. 1200
Circuit.....
[Pool]
Please let me know what your EasyTouch Display shows...
Thanks,
Jim R.