Stepper Motor Locations
Air distribution of the IHKA E38 (for example) is regulated using stepper motors. There are 10 stepper motors used for air distribution including:
Of these 10 stepper motors, the Fresh Air Flap stepper motor is operated as on previous systems. It has four circuits that control the motor rotation with a 500 Hz signal at each circuit as needed.
The remaining 9 stepper motors each contain a microprocessor that monitors operating signals on the M-Bus. When a specific signal is "heard" on the M-Bus the motor is activated by the microprocessor to carry out its function. Therefore, correct location by part number is critical.