I have a Pentair Intellichlor IC40 Chlorinator that I purchased and installed 2 years ago(July 2014), to replace my old unit. It is connected to a timer for 7 hours(10am to 5pm). A few days ago I observed that the lights were not working. I cleaned the cells by disconnected the IC40 unit and using cell cleaning solution purchased from my local Pinch-A-Penny and soaking the unit for about 15 minutes. There was only slight scale build-up prior to me cleaning it but I thought cleaning it would erase the doubt that it could be a dirty scaled cell buildup to be the cause. I then performed diagnostic tests to the Power Center Box using my Multimeter: 1.) I tested the fuse by visually inspecting it and it did not show any breakage, the wire appeared intact. I then use my meter to test the fuse at the resistance setting and my meter read a complete connection(it was good) 2.) I tested to see if power was coming to the unit and my meter showed 240VAC. 3.) I tested the power from the output leads from the Transformer and it read around 27 to 28 VAC 4.)I tested the output from PCB board(red and black connector) and it read 27VDC. After performing those tests and then reconnecting the IC40 cable end to the end of the power center connector end, the IC40 unit began to work and I thought my problem was resolved.
The very next day I decided to observe my unit when the timer is scheduled to turn it on(10am) just to be sure that the problem was resolved. No can do. The lights on the IC40 is not working just like before I performed my diagnostic tests to the power center. So I decided to perform another diagnostic test on the output of the PCB board and it read 27VDC. It appears my Power Center Box is operating fine. Could the problem be my relatively new IC40 Chlorinator? Is there a shorted wire within the IC40 Chlorinator?