Cobra Electronics CPI 400 - Manual (Page 9)

13 Nothing comes close to a Cobra ™ 12 English
NOTE The On/Off Switch turns the control circuit
in the inverter On and Off. It does not disconnect
power from the inverter.
When the switch is in the Off position, the inverter
draws no current from the battery. When it’s in the
On position, but no power is being supplied to the
load, the inverter draws less than 500 milliamperes
from the battery. This is low current draw. It would
take more than a week to discharge a 100 ampere-
hour battery at this rate depending on the age of
the battery.
Power and Protection Indicators
•
The Power and Protection Indicators include a green
light, a red light and an alarm.
Green Light
Power On – The green light should remain On steady.
Red Light and/or Alarm
Current Overload – The red light will turn On momentarily,
then the inverter will shutdown. The inverter will continue
to check for appropriate current levels while trying to
restart the load.
Voltage Overload – The red light will blink and the inverter
will shutdown. The inverter will continue to check for
appropriate voltage levels while trying to restart the load.
Voltage Shortage – As a warning that the voltage is
getting low, the internal alarm will sound. When the
voltage is too low, the inverter will shutdown and the red
light will turn On. The inverter will continue to check for
appropriate voltage levels while trying to restart the load.
Temperature Overload – The red light will turn On
momentarily, then the inverter will shutdown. The inverter
will continue to check for appropriate temperature levels
while trying to restart the load.
NOTE A momentary sound of the internal alarm
and/or flash of the red light is normal at start up.
Power & Protection
Indicators
Operation
Operating Limits
Operation
Operating Limits
•
Power Output
The inverter can deliver 400 watts for about 60 minutes.
The inverter must cool for 15 minutes before it can
resume operation at 400 watts. Note: The wattage
rating applies to resistive loads.
The inverter will operate most AC loads within its power
rating. Some induction motors used in freezers, pumps,
and other motor-operated equipment require very high
surge currents to start. The inverter may not be able
to start some of these motors even though their rated
current draw is within the inverter’s limits. The inverter
will normally start single phase induction motors rated
at
1 ⁄
2
HP or less.
Input Voltage
The inverter will operate from input voltage ranging
from 10 volts to 15 volts. Optimum performance will
occur when the voltage is between 12 volts and 14 volts.
If the voltage drops below 10.5V+/- 0.3V, an audible low
battery warning will sound. The inverter will shut down if
the input voltage drops below 9.5V+/-0.3V. This protects
the battery from being over-discharged. It will restart when
the input voltage exceeds 12V+/-0.3V.
The inverter will also shut down if the input voltage
exceeds 15.75V+/-0.75V. This protects the inverter
against excessive input voltage. Although the inverter
has protection against over-voltage, it may still be
damaged if the input voltage were to exceed 16 volts.