PPU/HMI fault: HMI screen or PPU keys inactive

What does PPU/HMI inactive mean?

The HMI screen or the keys on the PPU are unresponsive, preventing user interaction with the control system.

• Control system is in a crashed state
• Damaged PPU

Click steps to track your progress.

1. 1

   Check whether the control system is in a crashed state. If it is, restart the control system.

2. 2

   After restarting, check whether the fault still exists and if the HMI screen and keys are active.

3. 3

   If the fault still exists after these operations, professional replacement and maintenance are necessary as the PPU is likely damaged.