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Cobra CPI490 Operating Instructions Manual

Made by: Cobra
Type: Operating Instructions
Category: Inverter
Pages: 11
Size: 0.58 MB

 

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A1

Intro

Operation

Customer

Assistance

Warranty

Notes

Notice

Main Icons

Secondary Icons

Caution

Warning

Installation

Customer Assistance

Our Thanks to You

Intro

Operation

Customer

Assistance

Warranty

Notes

Notice

Main Icons

Secondary Icons

Caution

Warning

Installation

Introduction

Thank you for purchasing the Cobra Power 

Inverter CPI490. Properly used, this Cobra product 

will give you many years of reliable service.
How Your Cobra Power Inverter Works

The Cobra power inverter is an electronic product that  

has been designed and built to take low voltage DC (Direct 

Current) power from your automobile or other low voltage 

power supplies and convert it to standard 115 Volt AC 

(Alternating Current) power like the current you have in 

your home. This conversion process thereby allows you  

to use many of your household appliances and electronic 

products in automobiles, RVs, boats, tractors, trucks and 

virtually anywhere else.

Customer Assistance 

Should you encounter any problems with this product,  

or not understand its many features, please refer to this 

owner’s manual. If you require further assistance after 

reading this manual, Cobra Electronics offers the  

following customer assistance services:

For Assistance in the U.S.A. 

Automated Help Desk English only.  

24 hours a day, 7 days a week 773-889-3087 (phone). 
Customer Assistance Operators English and Spanish.  

8:00 a.m. to 5:30 p.m. CT, Monday through Friday  

(except holidays) 773-889-3087 (phone). 
Questions English and Spanish.  

Faxes can be received at 773-622-2269 (fax). 
Technical Assistance English only.  

www.cobra.com (on-line: Frequently Asked Questions).  

English and Spanish. productinfo

@

cobra.com (e-mail).

For Assistance Outside the U.S.A. 

Contact Your Local Dealer

©2014 Cobra Electronics Corporation

6500 West Cortland Street

Chicago, Illinois 60707 USA

www.cobra.com

Operating Instructions

400 WATT POWER INVERTER

CPI490

Printed in China 

Part No. 480-994-P

Version B

For more information or to  

order any of our products,  

please visit our website:

www.cobra.com

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Accessories

The Cobra line of quality  

products includes:

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CPI490_MANL.indd   1-3

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POWER /

FAULT

POWER

USB

DC TO AC POWER INVERTER

AC 115V/60HZ

400

17

Maintenance 

Very little maintenance is required to keep the inverter operating 

properly. The exterior of the unit should be cleaned periodically 

with a damp cloth to prevent accumulation of dust and dirt. At the 

same time, tighten the screws on the DC input terminals. Be sure 

vents and fans are free of dust or debris.

Product Service 

If you have any questions about operating or installing your new 

Cobra product, or if you are missing parts…
Please call Cobra first!  

DO NOT RETURN THIS PRODUCT TO THE STORE!  

See customer assistance on page A1.
If your product should require factory service, please call Cobra 

first before sending your power inverter. This will ensure the 

fastest turn-around time on your repair. You may be asked to  

send your power inverter to the Cobra factory. 
It will be necessary to furnish the following to have the product 

serviced and returned.
1.  For warranty repair include some form of proof-of-purchase, 

such as a mechanical reproduction or carbon copy of a sales 

receipt. If you send the original receipt, it cannot be returned. 

2.  Send the entire product.
3.  Enclose a description of what is happening with the power 

inverter. Include a typed or clearly printed name and address  

of where the power inverter is to be returned.

4.  Pack power inverter securely to prevent damage in transit.  

If possible, use the original packing material.

5.  Ship prepaid and insured by way of a traceable carrier  

such as United Parcel Service (UPS) or Priority Mail  

to avoid loss in transit to: 

 Cobra Factory Service 

Cobra Electronics Corporation  

6500 West Cortland Street 

Chicago, Illinois 60707 USA.

6.  If the power inverter is in warranty, upon receipt of your power 

inverter, it will either be repaired or exchanged depending on the 

model. Please allow approximately three to four weeks before 

contacting Cobra for status. If the power inverter is out of 

warranty, a letter will automatically be sent informing you  

of the repair charge or replacement charge.

If you have any questions, please call 773-889-3087 for assistance.

Maintenance and  

Product Service

Intro

Operation

Customer

Assistance

Warranty

Notes

Notice

Main Icons

Secondary Icons

Caution

Warning

Installation

Customer Assistance

Cooling Fan

A3

A2

Product Features

Intro

Operation

Customer

Assistance

Warranty

Notes

Notice

Main Icons

Secondary Icons

Caution

Warning

Installation

Introduction

Intro

Operation

Customer

Assistance

Warranty

Notes

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Main Icons

Secondary Icons

Caution

Warning

Installation

Introduction

Intro

Operation

Customer

Assistance

Warranty

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Main Icons

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Caution

Warning

Installation

Intro

Operation

Customer

Assistance

Warranty

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Main Icons

Secondary Icons

Caution

Warning

Installation

Intro

Operation

Customer

Assistance

Warranty

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Caution

Warning

Installation

Intro

Operation

Customer

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Installation

Intro

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Customer

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Installation

On/Off  

Power Switch

AC Outlet

Positive Battery 

Cable Terminal

(Red)

Contents

Introduction

Our Thanks to You . . . . . . . . . . . . . . . . . .  A1 

Customer Assistance  . . . . . . . . . . . . . . . .  A1 

Product Features  . . . . . . . . . . . . . . . . . . .  A2 

Important Safety Information . . . . . . . . . . .  1 

Quick Evaluation Before Installation . . . . . .  3 

Installation

Installation Requirements   . . . . . . . . . . . . .  5 

Mounting  . . . . . . . . . . . . . . . . . . . . . . . . . .  6 

Connecting Cables  . . . . . . . . . . . . . . . . . . .  6 

Power Consumption   . . . . . . . . . . . . . . . .  10 

Operation

Turning Your Inverter On or Off . . . . . . . .  11 

Power and Protection Indicators  . . . . . . .  12 

Operating Limits   . . . . . . . . . . . . . . . . . . .  13 

Troubleshooting Guide . . . . . . . . . . . . . . .  14 

Specifications . . . . . . . . . . . . . . . . . . . . . .  15 

Warranty

Warranty   . . . . . . . . . . . . . . . . . . . . . . . . .  16 

Customer Assistance

Maintenance . . . . . . . . . . . . . . . . . . . . . . .  17 

Product Service  . . . . . . . . . . . . . . . . . . . .  17

Protection and 

Power Indicator

Features

•  Two AC Receptacles
• 5V/2.1 USB Output
•  Automatic Thermal 

Protection/Shutdown

•  Reverse Polarity Protection
•  Low Battery Alarm
•  Low Battery Shutdown

Negative Battery 

Cable Terminal

(Black)

Nothing Comes Close to a Cobra

®

USB Outlet

AC Outlet

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Intro

Operation

Customer

Assistance

Warranty

Notes

Notice

Main Icons

Secondary Icons

Caution

Warning

Installation

Intro

Operation

Customer

Assistance

Warranty

Notes

Notice

Main Icons

Secondary Icons

Caution

Warning

Installation

Intro

Operation

Customer

Assistance

Warranty

Notes

Notice

Main Icons

Secondary Icons

Caution

Warning

Installation

1

Intro

Operation

Customer

Assistance

Warranty

Notes

Notice

Main Icons

Secondary Icons

Caution

Warning

Installation

Introduction

Important Safety Information

Important Safety Information 

Before installing and using your Cobra power inverter, 

please read these general precautions and warnings.

Caution and Warning Statements

To make the most of this inverter, it must be installed and 

used properly. Please read the installation and operating 

instructions carefully before installing and using it. Special 

attention must be paid to the CAUTION and WARNING 

statements in the manual.

CAUTION Statements specify conditions which  

could cause damage to the unit or other equipment.

WARNING Statements identify conditions that  

could result in personal injury or loss of life.

General Precautions

1.  Never install the inverter in a boat’s  

engine compartment where gas and  

battery fumes are present.

2.  Do not operate the inverter if it has been  

dropped or damaged in any way.

3.  Do not open the inverter; it contains no user-

serviceable parts. Attempting to service unit  

could cause electrical shock.

     NOTE Internal components remain  

charged after all power is disconnected.

4.  Do not expose the inverter to rain, snow,  

bilge water or spray.

5.  Do not obstruct the ventilation openings.
6.  Do not install the inverter in zero-clearance 

compartment.

CAUTION This inverter should be used in  

negative ground applications only.

Intro

Operation

Customer

Assistance

Warranty

Notes

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Main Icons

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Caution

Warning

Installation

Nothing Comes Close to a Cobra

®

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Intro

Operation

Customer

Assistance

Warranty

Notes

Notice

Main Icons

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Caution

Warning

Installation

WARNING Power inverters contain components  

that can produce arcs or sparks. To prevent fire  

or explosion, do not install the inverter in areas or 

compartments containing batteries or flammable 

materials or in locations that require ignition-

protected equipment.
WARNING To reduce the risk of fire, do not cover  

or obstruct the ventilation openings. Do not install 

inverter in zero-clearance compartment.

Proposition 65: Warning: Wash Hands After 

Handling Power Cord

The power cord on this product contains lead, a chemical 

known in the state of California to cause birth defects or 

other reproductive harm.

Caution: Rechargeable Appliances

Certain chargers for small nickel cadmium batteries can be 

damaged if connected to the Cobra 400 watt inverter. Two 

particular types of equipment are prone to this problem:  

1.  Small battery-operated appliances 

such as flashlights, razors, and 

night lights that can be plugged 

directly into an AC receptacle to 

recharge.

2.  Certain battery chargers for 

battery packs used in hand power 

tools. These chargers have a 

WARNING label stating that 

dangerous voltages are present  

at the battery terminals.

This problem does not occur with the vast majority of 

battery operated equipment. Most use a separate charger 

or transformer that is plugged into the AC receptacle 

and produces a low voltage output. If the label on the AC 

adapter or charger states that it produces a low voltage  

AC or DC output (less than 30 volts), the inverter will  

have no problem powering the adapter safely.

Intro

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Customer

Assistance

Warranty

Notes

Notice

Main Icons

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Caution

Warning

Installation

Plug In Directly

Dangerous 

Voltages

3

2

Important Safety Information

Intro

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Customer

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Warranty

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Installation

Introduction

Output Waveform

Some very sensitive electronic equipment may not operate 

satisfactory on “square wave” or “modified sine wave.”  

The output waveform is referred to as “square wave” or 

“modified sine wave.” It is a stepped waveform designed to 

have characteristics similar to the sine wave shape of utility 

power. A waveform of this nature is suitable for most AC 

loads (including linear and switching power suppliers used 

in electronic equipment, transformers and motors).

Quick Evaluation Before Installation 

This section provides you with basic information about the 

inverter and how to check its performance before installation.
Be sure to have on hand:

£

  A 12 volt DC power source (such as a vehicle battery).

 The power source must provide 

between 11 and 15 volts DC and  

be able to supply enough current to 

run the test load. As a rough guide, 

divide the wattage of the test load by 

10 to get the current (in amperes) 

the power source must deliver.

£

  The provided two foot cigarette lighter cable and  

two foot direct-to-battery 12 gauge cable. 

Only use the cables provided with your inverter.  

The cigarette lighter cable is suitable for operating the 

inverter at loads up to 150 watts. Connect by securely 

inserting the plug into the cigarette lighter socket.

 

CAUTION Do not use the cigarette lighter cable  

for loads higher than 150 watts. When connecting 

loads larger than 150 watts, please connect the 

inverter directly to the battery.

Quick Evaluation  

Before Installation

Intro

Operation

Customer

Assistance

Warranty

Notes

Notice

Main Icons

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Caution

Warning

Installation

Introduction

Power Supply

Cig. Lighter Cable

12 Gauge Cable

Nothing Comes Close to a Cobra

®

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£

  A test load that can  

be plugged into the AC  

receptacle on the inverter  

for short term testing at  

a low power level.

To check your inverter’s performance before installation:

1.  Turn the inverter off (see page 11 

for details). If the power source is 

a DC power supply, switch it off 

as well.

2.  Connect cables to power  

input terminals (see page 6  

for details).

3.  Connect cable to power source 

(see page 8 for details).

4.  Check to make sure all 

connections are secure.

5.  Turn the inverter on. If the  

power source is a DC power 

supply, switch it on first.

6. Plug in the test load.
The inverter should supply power  

to the load. If the inverter is not 

working properly, refer to the 

troubleshooting guide on page 14  

or power and protection indicators 

section on page 12.

5

4

Quick Evaluation  

Before Installation

Intro

Operation

Customer

Assistance

Warranty

Notes

Notice

Main Icons

Secondary Icons

Caution

Warning

Installation

Introduction

Installation Requirements

Intro

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Customer

Assistance

Warranty

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Caution

Warning

Installation

Installation

Connect Terminals

Connect Power Source

POWER /

FAULT

POWER

USB

On/Off Switch to Off

Intro

Operation

Customer

Assistance

Warranty

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Notice

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Caution

Warning

Installation

Test Load

Nothing Comes Close to a Cobra

®

POWER /

FAULT

POWER

USB

USB Connection

Intro

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Customer

Assistance

Warranty

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Notice

Main Icons

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Caution

Warning

Installation

POWER /

FAULT

POWER

USB

Connect Test Load

Intro

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Customer

Assistance

Warranty

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Installation

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Customer

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Installation

Installation Requirements 

The inverter must be installed in an area that meets  

all of the following requirements:
A.  Dry  

Do not place in an area where water can drip  

or splash on the inverter.

B.  Cool 

Ambient air temperature should be between 30°F  

and 105°F (0°C and 40°C). The cooler the better.

C.  Ventilate 

Allow at least one inch (three cm) of clearance around 

the inverter for proper airflow. Make sure that ventilation 

openings on the ends of the unit are not obstructed.

D. Safe 

Do not install the inverter in the same compartment  

as a battery or in any compartment that contains 

flammable liquids such as gasoline.

E.  Close to Battery 

Install unit as close to battery as possible (without 

being in the same compartment) to minimize the  

length of cable required to connect the inverter to  

the battery. It is better and cheaper to run longer  

AC wires than longer DC wires (cables).

CAUTION To avoid fire, do not cover or obstruct 

ventilation openings. Do not install inverter in a zero-

clearance compartment. Overheating may result.
CAUTION The inverter must only be connected to 

batteries with a nominal output voltage of 12 volts. 

It will not work with a 6 volt battery, and will be 

damaged if it is connected to a 16 volt battery.

WARNING This unit contains components which  

can produce arcs or sparks. To prevent fire or 

explosion, do not install in compartments containing  

a battery or flammable materials, or in a location 

which requires ignition protected equipment.

POWER /

FAULT

POWER

USB

On/Off Switch to On

Intro

Operation

Customer

Assistance

Warranty

Notes

Notice

Main Icons

Secondary Icons

Caution

Warning

Installation

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Intro

Operation

Customer

Assistance

Warranty

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Caution

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Installation

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Installation

7

6

Connecting Cables

Mounting                                                    

To mount your inverter:
1.
  Place the inverter on a flat surface with the mounting 

bracket against the mounting surface. 

2.  Mount to secure surface using mounting hardware  

that is corrosion resistant (not included). 

The inverter can be mounted horizontally or vertically.

Connecting Cables                                      

Power wire and wiring are very important to the 

performance of the inverter. Because the inverter has a 

low voltage, high current input, low resistance wiring is 

essential between the battery and inverter. This is so it  

can deliver the maximum amount of energy to the load. 

Only use the cables provided with your power inverter.
  

 To connect the cables between  

the inverter and the battery:
1.
  Turn the On/Off Switch on the 

inverter to the off position. If 

the power source is a DC power 

supply, switch it off as well. 

Intro

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Installation

Mounting and 

Connecting Cables

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Installation

DC 

TO A

C POWER INVER

TER

AC 1

15V/60HZ

400

Mounting Brackets

Mounting Hardware

2.  Connect cable to the Power Input Terminals on  

right side panel of the inverter. The red terminal is 

positive (+) and the black terminal is negative (-).  

Insert the ends of the cables onto the terminals  

and tighten the screws to clamp the cables safely. 

3.  Connect cable to your vehicle’s cigarette lighter socket.

NOTE If the inverter is to be used at levels above 

150 watts for extended periods of time, a direct 

connection to the battery is recommended. Do  

not use the cigarette cord for loads higher than  

150 watts. Please contact your local dealer or 

customer assistance for the proper cord for  

direct to battery connections.

CAUTION Reverse polarity connections (positive  

to negative) will blow inverter fuses and may 

permanently damage the unit. Such damage  

is not covered by the warranty.
CAUTION Remove any jewelry (watch, ring, etc.). 

Be careful not to short circuit the battery with any 

metallic object (wrench, etc.).

Connect Terminals

Connect Power Source

Nothing Comes Close to a Cobra

®

POWER /

FAULT

POWER

USB

On/Off Switch to Off

Intro

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Customer

Assistance

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Intro

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Customer

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9

8

WARNING You may observe a spark when making 

the connection because current can flow to charge 

the capacitors in the inverter. Do not make this 

connection in the presence of flammable fumes. 

Explosion or fire may result. Thoroughly ventilate 

the battery compartment before making this 

connection.

3.  Connect cable to the power source:

a.  Connect the cable from the Negative (Black) 

Terminal of inverter to the Negative Terminal  

of the power source. Make a secure connection.

b.  Connect the cable from the Positive (Red) Terminal 

of the inverter to the Positive Terminal of the power 

source (the battery’s main fuse or the battery  

selector switch, if you are using one). Make a  

secure connection.

You might observe a spark when you make this connection 

since current can flow to charge capacitors in the inverter.
All power connections to your Cobra inverter must  

be Positive to Positive and Negative to Negative.

CAUTION Do not connect the inverter and another 

AC source (such as a generator or utility power)  

to the AC wiring at the same time. The inverter  

will be damaged if its output is connected to  

AC voltage from another source. Damage can  

even occur if the inverter is switched off.
CAUTION Do not connect the inverter to an AC 

branch circuit that has high-power consumption loads. 

It will not operate electric heaters, air conditioners, 

stoves, and other electrical appliances that consume 

more than 400 watts.
CAUTION Loose connectors result in excessive 

voltage drop and may cause over heated wires  

and melted insulation.
CAUTION Reverse polarity connections (positive  

to negative) will blow external fuse in the inverter 

and may permanently damage the unit. Such 

damage is not covered by the warranty.
CAUTION Remove any jewelry (watch, ring, etc.). 

Be careful not to short circuit the battery with  

any metallic object (wrench, etc.).

WARNING 115 volt AC power is potentially lethal. 

Do not work on AC wiring when it is connected to  

the inverter (even if it is switched off) unless the  

DC power source is physically disconnected from  

the inverter. Also, do not work on AC wiring if it is 

connected to another AC power source such as  

a generator or the utility line.
WARNING You may observe a spark when making 

the connection because current can flow to charge 

the capacitors in the inverter. Do not make this 

connection in the presence of flammable fumes. 

Explosion or fire may result. Thoroughly ventilate the 

battery compartment before making this connection.

Connecting Cables

Connecting Cables

Intro

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Customer

Assistance

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Nothing Comes Close to a Cobra

®

Connect Power Source

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Power Consumption 

For each piece of equipment you will be operating from the 

inverter, you must determine the battery’s reserve capacity 

(how long the battery can deliver a specific amount of 

current — in automotive batteries, usually 25 amperes)  

or ampere-hour capacity (a measure of how many amperes 

a battery can deliver for a specified length of time). 

Example – Reserve capacity: a battery with a reserve 

capacity of 180 minutes can deliver 25 amperes for 180 

minutes before it is completely discharged.
Example – Ampere-hour capacity: a battery with an 

ampere-hour capacity of 100 ampere-hours can deliver 5 

amperes for 20 hours before it is completely discharged.

To determine the battery ampere-hour  

capacity you require:
1.
  Determine how many watts each piece of equipment 

consumes. This can normally be found on the product 

label. If only the current draw is given, multiply the 

current draw by 115 to get the watt consumption.

2.  Estimate the time (in hours) that each piece of equipment 

will be running between battery charging cycles.

3.  Calculate the total watt-hours of energy consumption 

(power x operating time) using the average power 

consumption and the total estimated running time  

(in hours). Power x Operating Time = Watt-Hours.

4.  Divide the watt-hours by 10 to determine how many 

power supply’s (12 volt) ampere-hours will be consumed.

11

10

Turning Your Inverter On or Off 

Be sure to have your power inverter properly installed before 

attempting to turn the unit on (see installation page 5).

To turn the power inverter on:
1.
  If a DC power supply is being 

used as the power source, switch 

it on

2.  On the left side panel, switch the 

On/Off Switch to on.

The inverter is now ready to deliver AC power to your loads. 

If several loads are to be operated by the inverter, turn them 

on separately, after the inverter has been turned on. This 

will ensure that the inverter does not have to deliver the 

starting currents required for all the loads at once.

To turn the power inverter off:
1.
  On the left side panel,  

switch the On/Off Switch  

to off.

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 On and Off

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Power Consumption

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Nothing Comes Close to a Cobra

®

Laptop

50 watts x 2 hours  

= 100 watt-hours

Blender

300 watts x 15 minutes  

= 75 watt-hours

POWER /

FAULT

POWER

USB

On/Off Switch to Off

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13

12

Power and Protection Indicators 

The power and protection indicator includes a dual color 

green and 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 blink continuously, 

then the inverter will shutdown. The inverter will continue 

to check for appropriate current levels while trying to 

restart the load.
DC input voltage overload – The red light will turn on and 

the inverter will shutdown. The inverter will continue to 

check for appropriate voltage levels while trying to restart 

the load.
DC input 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 

light will turn red. The inverter will continue to check for 

appropriate voltage levels while trying to restart the load.
Temperature overload – The red light will blink, 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 and Protection 

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Operating Limits

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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 one-half 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.

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®

CPI490_MANL.indd   12-13

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15

14

Troubleshooting Guide

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Specifications 

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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 

in CLP
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 

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®

CPI490_MANL.indd   14-15

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16

Limited Two-Year Warranty  

For Products Purchased in the U.S.A.

Cobra Electronics Corporation warrants that its Cobra power 

inverter, and the component parts thereof, will be free of defects  

in workmanship and materials for a period of two years from the 

date of first consumer purchase. This warranty may be enforced by 

the first consumer purchaser, provided that the product is utilized 

within the U.S.A. 
Cobra will, without charge, repair or replace, at its option, defective 

power inverters, products or component parts upon delivery to the 

Cobra Factory Service department, accompanied by proof of the 

date of first consumer purchase, such as a duplicated copy of a 

sales receipt. 
You must pay any initial shipping charges required to ship the 

product for warranty service, but the return charges will be at 

Cobra’s expense, if the product is repaired or replaced under 

warranty. This warranty gives you specific legal rights, and you 

may also have other rights which may vary from state to state.
Exclusions: This limited warranty does not apply:
1.  To any product damaged by accident.
2.  In the event of misuse or abuse of the product or  

as a result of unauthorized alterations or repairs.

3.  If the serial number has been altered, defaced, or removed.
4.  If the owner of the product resides outside the U.S.A.
All implied warranties, including warranties of merchantability  

and fitness for a particular purpose are limited in duration to the 

length of this warranty. Cobra shall not be liable for any incidental, 

consequential or other damages; including, without limitation, to 

damages resulting from loss of use or cost of installation. 
Some states do not allow limitations on how long an implied 

warranty lasts and/or do not allow the exclusion or limitation  

of incidental or consequential damages, so the above limitations 

may not apply to you.

For Products Purchased Outside the U.S.A.

Please contact your local dealer for warranty information.

Trademark Acknowledgement  

Cobra

®

, Nothing Comes Close to a Cobra

®

 and the snake design  

are registered trademarks of Cobra Electronics Corporation, USA. 

Cobra Electronics Corporation™ is a trademark of Cobra  

Electronics Corporation, USA.

Warranty and Trademark 

Acknowledgement

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