User manual

30
USB voltage output
Different USB-supplied small standard devices such as MP3 players, mobile phones, etc. can be
connected directly to the converter and charged. The USB output is only active when the converter is in
operation.
Plug the small USB device into the USB socket (8) and switch on the converter.
The USB output is only used to supply small USB devices. Do data is transmitted.
Protective functions
The DC-AC converter is equipped with extensive protective functions, which ensure safe operation and
protect the DC-AC converter, the battery and the connected consumer.
Protection against wrong polarity
When the input polarity is reversed upon connection, the converter cannot be taken into operation.
Switch off the converter and verify correct polarity. Connect the converter with the correct polarity. The
converter can be put into operation again after correct connection.
Over-Voltage Protection
The DC-AC converter switches off the output automatically as soon as the input voltage exceeds the
admissible range (see technical data). This switch-off is indicated by quickly flashing LED displays.
When the input voltage is reduced to the permitted voltage value again, the converter switches on again
automatically.
Undervoltage Cutoff (Deep Discharge Protection)
The DC-AC converter switches off the output automatically as soon as the input voltage undercuts the
admissible range (see technical data).
Before the output is switched off, however, LED (9) flashes slowly as a warning. When the
input voltage sinks farther and reaches the cut-off value, the output is switched off. This switch-off is indi-
cated by quickly flashing LED displays (9) and (10).
The undervoltage cut-off normally triggers when the batteries are empty. In most cases, it is sufficient to
recharge the battery. When the reactivation threshold is reached, the converter switches back to normal
operation.
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The undervoltage switch-off is dynamic. The switch-off threshold set is automatically
reduced by up to 1.0 V under increased load. This balances out shorter operating times
for power sources with lower voltages.