Auto: Load starts when the terminal voltage of 
module is higher than Von value. The system 
stops loading when the terminal voltage of 
module is close to 0V for more than 25ms and 
system is under the state of detecting Von again. 
Manual: The load starts when the terminal voltage 
of module exceeds the Von setting value. Loading 
keep going even if the terminal voltage of module 
close to 0V.