Calibration Run

Calibration Run

If the battery is disconnected, IHKA control module memory is cleared and the module loses its information about where the flaps are positioned. Therefore, when power is restored, the control module performs a calibration run, whether the IHKA system is turned "On" or "Off".

The control module runs all the stepper motors at maximum speed to fully close the flaps, and then continues to run the motors for a few seconds more than the normal endstop-to-endstop time, in order to ensure the flaps are closed.

The calibration run takes about 40 seconds. During that time, soft "ticking" or "scratching" noises can be heard, as the flaps reach their endstops but continue to be pulsed.

The control module also monitors system voltage. A sudden surge or dropout causes the control module to automatically perform the calibration run.