... “AT” indicator blinks, which indicates autotuningis in progress. When auto-tuning finishes, the “AT” indicator light turns off. Now newlycalculated PID ... used by the controller.ii. To EXIT during the auto-tuning process, press and hold (>) until “AT” indicator turns off. ... deg FPower up the controller and press (>) to activate auto-tuning. When “AT” stops blinking, new PIDparameters are generated for ...