I have a 3 year old pool with the Pentair IC40. Until last week, it has worked without problems. When I go to the diagnostics menu on the Easy Touch control panel or wireless remote, I can the Comm Link Error and 0 ppm. I pulled the IC40 off and cleaned this weekend, but no change in status. The LEDs on the IC40 itself indicate it is working fine: Salt is solid green, Cell Status is solid green, Flow Status is solid green, and the output is set to 40%. Before I start throwing money after replacing parts, I thought I'd check here to see if anyone had any advice as to which parts to start with...