White PIEZON® LED is not working.

1. Clean and dry the handpiece connection and try again.
2. Your PIEZON® Handpiece LED might have been switched off by activity time-outs:

• after 10 minutes of continuous operation,
• or after 20 seconds of inactivity off the holder.
  In both cases, put back the handpiece into the holder, wait 1 minute and try again.

If still not solved, contact EMS aftersales service.