Duracell Digital inverter 400 Owner's Manual page 14

Table 2 Digital Display Panel Functions
Item Function
1
Press and hold to turn the unit on and off.
When the unit is on, press to toggle the display function to show input
voltage, output power or output voltage.
2
Normal Operation
Digital display shows input voltage, output power or output voltage.
Error Mode
Digital display shows error codes and alarm sounds when unit has
shut down due to under-voltage, over-voltage, over-load, overheating
or high-surge.
3
LEDs indicate the status of the digital display.
Audible Alarm
An audible alarm warns you if an under-voltage shutdown is about to
occur.
9