© 2016 Sensata Technologies
25
Operation
3.4 Inverter
Startup
ON/OFF Switch
– The inverter can be turned on and off by lightly pressing
and releasing the Power ON/OFF switch on the front of the inverter. When the
inverter is
fi
rst connected to the batteries, or when its automatic protection
circuit has turned the inverter off, the ON/OFF switch will need to be pressed
to start the unit. Once the inverter has been turned on, pressing the Power
ON/OFF switch alternately turns the inverter on and off.
WARNING:
The Power ON/OFF control switch does not turn on or off
the charger feature. If AC power (utility or generator) is connected
and quali
fi
ed on the AC input, this AC power will also be available
on the AC output and is not controlled by the Power ON/OFF switch.
Status LED Indicator
– The status indicator is a green LED (Light Emitting
Diode) that provides information on the operational mode of the inverter. Watch
this indicator for at least 10 seconds to determine the inverter’s operational
condition from the information below:
Inverter Mode
•
Off
– Indicates the inverter is off; there is no AC power from the inverter,
shorepower, or generator at the inverter’s output terminals.
•
Blinks On (once every second)
– The inverter is on and is using energy
from the battery. The inverter is either providing full power to the loads
connected to the inverter, or it’s in Search mode and ready to supply
AC power to the connected loads.
Protection Mode
There are
fi
ve fault conditions that will cause the inverter to shut down;
Low Battery, High Battery, Over-temperature, AC Overload, and Internal
faults. If your inverter has shut down, monitor the status indicator and
count the number of blinks that occur every four seconds to determine the
particular reason for the shutdown. Once you have determined the reason
for the shutdown, refer to the Troubleshooting section to help diagnose/
clear the fault condition.
•
Blinks On (1 time every four seconds)
– Low Battery fault
•
Blinks On (2 times every four seconds)
– High Battery fault
•
Blinks On (3 times every four seconds)
– Over-temperature fault
•
Blinks On (4 times every four seconds)
– AC Overload fault
•
Blinks On (5 times every four seconds)
– Internal fault
Charge Mode (MM1212/MM1212-G models)
The green LED status indicator provides additional information:
•
Blinks Off (once every four seconds)
– The unit is charging the batteries
connected to the inverter. The external AC power (shorepower or
generator) connected to the inverter’s input is passing through the
inverter and is powering the AC loads connected to the inverter’s output.
