There are two main options for swapping from an IQ Panel 2 to an IQ Panel 4.
The backup and restore process will carry over user codes and RF sensor programming to the new panel. This guide describes the backup and restore process for Qolsys systems.
You can also swap the panel manually, which would involve programming the panel from scratch and swapping your IMEI number using the System Manager. Steps for programming an IQ Panel 4 can be found below.