Electrical test
This test is designed to ensure users or technicians for integrity of the electrical components to be sound and safe also visible in the main menu and you can use the manual instruction periodically.  

Air leakage test
According to standard DIN EN 13060-1. The Air leakage test is performed automatically.
When you select the air leakage test in the main menu, the result would be compared with optimum condition and announced on carried out instruction.