The software for the Pacemaker HF is memorized on a small processor board. For an update with new software, you need to change this board.
Before you start to change the board write down the voltage value you were using for your application.
Switch off the main switch of PowerCURE™
Wait 5 minutes, before you remove the cover. Capacitors with high voltage inside!
Remove the processor board carefully by hand. Do not use any tools for that.