System Description: System: Fail-Safe

When a malfunction listed below occurs, the inverter unit turns OFF the AC 120 V outlet main switch indicator and stops the output by operating the fail - safe.

Malfunction item	Fail-safe condition	Fail-safe cancellation condition
Inverter unit is overheated	When the inverter unit is overheated, the output stops to protect the inverter unit.	After the inverter unit temperature is lowered, the AC 120 V outlet main switch ON → OFF → ON operation allows normal return.
Inverter unit power supply voltage is 11.5 V or less	When inverter unit input voltage is lowered, the output stops to protect the battery from running out.	Automatic normal return when inverter unit power supply voltage reaches 11.5 V - 16 V.
Inverter unit power supply voltage is 16 V - 18 V	When inverter unit input voltage reaches 16 V - 18 V, the output stops to protect the inverter unit.	Automatic normal return when inverter unit power supply voltage reaches 11.5 V - 16 V.
Inverter unit power supply voltage is 18 V or more	When inverter unit input voltage reaches 18 V or more, the output stops to protect the inverter unit.	After the inverter unit power supply voltage reaches 11.5 V - 16 V, the AC 120 V outlet main switch ON → OFF → ON operation allows normal return.
Inverter unit output current is 2.8 A or more	When inverter unit output current reaches 2.8 A or more, the output stops to prevent over current. (e.g. connecting an electric appliance exceeding rated output)	Automatic normal return when inverter output current reaches 2.8 A.
Inverter unit output signal (AC 120 V output signal) is shorted	When inverter unit output signal is shorted, the output stops.	After recovering from inverter unit output signal short, the AC 120 V outlet main switch ON → OFF → ON operation allows normal return.