Updating a SOREL controller in 5 easy steps: 1. Switch off power supply 2. Take off the cover 3. Place the update board onto the port 4. Close the cover and switch on power supply 5. Confirm to start the installation After a few moments it’s done! Remember to remove the update board again, power supply being switched off. Important notice: don’t carry out firmware updates without consulting us, to ensure compatibility of hardware and software!