Troubleshooting Reference - Duracell Digital inverter 400 Owner's Manual

Troubleshooting reference

This section describes problems, their symptoms, possible causes, and
solutions.
Problem: The AC load will not operate. Digital display is off.
Possible Cause
Battery is defective.
The inverter has been connected
with reverse DC input polarity.
Loose cable connections.
Vehicle's lighter socket or 12 V
outlet fuse is blown.
Problem: The inverter will run some small loads, but not larger ones.
Possible Cause
Voltage drop across DC cables.
24
Solution
Check battery and replace if required.
Check connection to battery.
The inverter has likely been damaged and
needs to be repaired.
Have the unit repaired (not covered under
warranty).
Check cables and connections.
Tighten as required.
Replace the fuse with a similar one as
recommended in your vehicle's manual and
follow the section, "Connecting for loads
over 150 W", if your AC product is rated
more than 150 watts.
Solution
Shorten cables or use heavier cables.