Double flash
(On:0.1s, off: 0.1s, then, On:0.1s,
off: 1.7s, cycle: 0.2s)
3.2. Keys Operation
There is a key on the controller, which is used in conjunction with the battery type
indicator for selection of battery type. The specific operation mode is as follows:
In the current operating state, press and hold the key for 8 seconds. The battery type
indicator (the color displayed is that of the previously saved battery type) starts to flash
(the controller turns off charging and other works and enters idle state). At this point,
each time the key is pressed, the battery type indicator changes a color which
corresponds to a battery type. After the battery type is selected, press and hold the key
for 8 seconds again or maintain no operation for 15 seconds. Then, the controller will
automatically save the currently set battery type and enter the normal operating mode;
In addition, if you press and hold the key for 20s, the controller will restore the factory
default parameters.