I just replaced the cell, after getting a 120, 121 error code, and the voltage reading at the cell was high (38). New cell has been working great for about a week. This morning I went to turn the cell down, as chlorine levels were a little high. The cell was not showing on the PDA. Went to the control box, and the lcd was blank on the front panel and it showed no power. cut the breaker off, and back on and it gave a 170/193 error. Cut the power to disconnect the sensor to test the front board , and now the front panel does not come on. The incomming voltages are reading correct. Any ideas?