Waeco CF-50 switching protsess 220V to 12V to 220V

Waeco coolbox is equipped with an integrated multi voltage power supply
(110-240 V) and can be connected directly to the alternating current. The
integrated power supply is equipped with an automatic switchover to
mains supply when the unit is connected to, although the DC cable still
is connected. That is why the socket should be installed close to the unit
and be easy accessible. After the security device is active, parts of the
equipment still may be under voltage. During switching process the red
LED might flash for some minutes.