Note: The fan is thermally controlled to turn on when the internal temperature of the unit reaches 112 - 120 Deg. F (45 - 50 Deg. C).

Inverter mode but no power

1. Check display to see if low battery condition is present. Remove all loads, unplug the AC power cord, for 10 sec. plug it back in. Allow the battery to charge when the
   AC Power resumes before running the Inverter on battery again.
2. Check display to see if fault condition is present.

Inverter does no operate and no message on display

1. Check the battery connections and the mains connections

Inverter trips frequently at UPS mode

1. Reduce the load and reset the inverter

Pump Does Not Run in DC mode

1. Low Battery - Check conditions of batteries and recharge
   
2. Loose or corroded battery connection - Check and clean all connections

AC Power is available but the inverter will not operate in AC mode

1. Loose AC output connection - Check all AC output connections

Low surge power

1. Weak batteries, battery cables too long - Refer to cable and battery recommendation in the Operation Manual

Unit overheats

1. Unit is hot - Reduce load and let the unit cool down. Old. failing batteries can cause overheating.