Peltier Cooler
The Peltier Coolers of series AA / DA / LA have the possibility to switch the fan parallel to the supply of the Peltier module on the terminal board. Never use this option together with the operation of a Peltier controller with PWM output! The fan may be damaged. Also there is a filter capacitor on the board, which accepts this faux pas only for a few seconds before terminating its life noisily.