21
Nothing comes close to a Cobra
®
20 English
Operating Limits
•
Power Output
The inverter can deliver 2200 watts for about 60 minutes. The inverter must cool
for 15 minutes before it can resume operation at 2200 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
was to exceed 16 volts.
Operating Limits
Operation
Troubleshooting Guide
Operation
Troubleshooting Guide
•
Problem/Symptom
Low output voltage
No output voltage
No output voltage after
prolonged use
No output voltage,
“Protect” indicator
lighted
No output voltage
No output voltage
Low battery alarm
on all the time
Possible Causes
Overload
Low input voltage
Thermal shutdown
High input voltage
Short circuit
Inverter switched Off
No power to inverter
Reverse DC polarity
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.
Turn inverter On.
Check wiring to inverter.
Observe correct polarity.
Check connections.
Make sure battery is fully charged.
