HMI won't accept selections - Control panel unresponsive

What does hmi won't accept selections mean?

The control panel (HMI) is not registering button presses or selections. This could be a control lock issue or a problem with the connections or the unit itself.

• Control lock is activated
• Connection problem between ACU and HMI
• ACU problem
• Human-Machine Interface problem

Click steps to track your progress.

1. 1

   Check if the control lock LED is on. If so, press and hold the button to deactivate it.

2. 2

   Check connections and harness continuity between ACU and HMI.

3. 3

   Check ACU power (Refer to TEST #1, page 12).

4. 4

   Check Human-Machine Interface (Refer to TEST #2, page 14).