How can the control head be reset to the factory default settings?

Original reset: carry out the following steps <10 s

• Switch off voltage to PSS
• Remove SD card
• Switch on voltage to PSS
• Press reset button >5s until DIAG-LED flashes
• Release reset button
• Press reset button
• Release reset button

The control head now has the following default settings:

• Device name: PSS__
• IP address: 169.254.1.0 to 169.254.254.255 (Auto-IP mechanism)
• Subnet mask: 255.255.0.0
  SD card can be formatted via a PC.