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Troubleshooting Guide
Operation
Specifications
Operation
Specifications
Continuous output power (1 hour) . . . . . . . . . . . . 400W
Surge rating (0.1 second) . . . . . . . . . . . . . . . . . . . 800W
Peak efficiency (12V 1⁄2 load) . . . . . . . . . . . . . . > 88%
Efficiency (full load, 12V) . . . . . . . . . . . . . . . . . . . > 83%
No load current draw . . . . . . . . . . . . . . . . < 0.5A (12.6V)
Output waveform (resistive load) . . . Modified sine wave
Output frequency . . . . . . . . . . . . . . . . . . . . 58HZ 62HZ
Output voltage . . . . . . . . . . . . . . . . . . . . . . 109V 120V
USB output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5V
Input voltage . . . . . . . . . . . . . . . . . . 10.4VDC 14.4VDC
Alarm voltage (unload) . . . . . . . . . . . . . . .10.2V 10.8V
Shutdown voltage (unload) . . . . . . . . . . . . . 9.2V 9.8V
Operating temperature range . . . . . . . . . . . . 0°C 40°C
(32°F 104°F)
Storage temperature range . . . . . . . . . . . . -40°C 85°C
(-40°F 185°F)
Protection . . . . . . . . . .Overload, short-circuit, overtemp,
reverse polarity, under/over voltage
Notes
All protection is automatically recovered.
To protect the battery, if the unit needs to be restarted
after low voltage protection, the voltage of DC input
should be above 12V.
To extend the life of the fan, it will stop when there is no
load. The speed of the fan increases as the load increases.
The unit is completely insulated in input and output for
added safety.
Problem/Symptom
Low output voltage
No output voltage
No output voltage
after prolonged use
No output voltage,
“Protect” indicator
lighted
No output voltage
No power to
inverter
Low battery alarm
on all the time
Possible Causes
Overload
Low input voltage
Thermal
shutdown
High input
voltage
Short circuit
Blown fuse
Poor DC wiring
Poor battery
condition
Solution
Reduce the load.
Recharge battery.
Check connections
and cable.
Allow inverter
to cool off.
Reduce load,
continuous
operation input
current required.
Improve ventilation;
Make sure ventilation
openings in the
inverter are not
obstructed.
Reduce ambient
temperature.
Make sure
the inverter is
connected to
12V battery.
Check regulation
of charging system.
Check load for
proper operation.
Replace fuse.
Check
connections.
Make sure battery
is fully charged.
Troubleshooting Guide
Nothing Comes Close to a Cobra
®
10


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