FLEX FX0421 280W 24V Charger User Manual

June 6, 2024
FLEX

FLEX FX0421 280W 24V Charger logo

FLEX FX0421 280W 24V Charger

FLEX FX0421 280W 24V Charger pro

SAFETY SYMBOLS

The purpose of safety symbols is to attract your attention to possible dangers. The safety symbols and the explanations with them deserve your careful attention and understanding. The symbol warnings do not, by themselves, eliminate any danger. The instructions and warnings they give are no substitutes for proper accident prevention measures. including all safety alert symbols such as “DANGER,” “WARNING,” and “CAUTION” before using this tool. Failure to follow all instructions listed below may result in electric shock, fire, and/or serious personal injury.

  • This is the safety alert symbol. It is used to alert you to potential personal injury hazards. Obey all safety messages that follow this symbol to avoid possible injury or death.
  • DANGER indicates a hazardous situation which, if not avoided, will result in death or serious injury.
  • WARNING indicates a hazardous situation which, if not avoided, could result in death or serious injury.
  • CAUTION, used with the safety alert symbol, indicates a hazardous situation which, if not avoided, will result in minor or moderate injury.

Damage Prevention and Information Messages
These inform the user of important information and/or instructions that could lead to equipment or other property damage if they are not followed. Each message is preceded by the word “NOTICE”, as in the example below:
NOTICE : Equipment and/or property damage may result if these instructions are not followed.
WARNING The operation of any power tools can result in foreign objects being thrown into your eyes, which can result in severe eye damage. Before beginning power tool operation, always wear safety goggles or safety glasses with side shields and a full face shield when needed. We recommend a Wide Vision Safety Mask for use over eyeglasses or standard safety glasses with side shields. Always use eye protection which is marked to comply with ANSI Z87.1.

IMPORTANT SAFETY INSTRUCTIONS

SAVE THESE INSTRUCTIONS
This manual contains important safety and operating instructions for battery charger Model FX0421. Do not substitute any other charger. Before using battery charger, read all instructions and cautionary markings on

  1. battery charger,
  2. battery pack, and
  3. product using battery.

CAUTION To reduce risk of injury, charge only Li-Ion type rechargeable batteries. Other types of batteries may burst causing personal injury and damage. Charge only FLEX rechargeable batteries listed in the manual. Other types of batteries may burst causing personal injury and damage. Charge battery pack within the required temperature range. Store charger and battery pack in locations where temperature is within the recommended storage temperature range. This is important to prevent serious damage to the battery cells. Do not recharge battery in damp or wet environment. Do not expose charger to rain or snow. Water entering battery charger may result in electric shock or fire.
Battery leakage may occur under extreme usage or temperature conditions. Avoid contact with skin and eyes. The battery liquid is caustic and could cause chemical burns to tissues. If liquid comes in contact with skin, wash quickly with soap and water. If the liquid contacts your eyes, flush them with water for a minimum of 10 minutes and seek medical attention. Place charger on flat nonflammable surfaces and away from flammable materials when recharging battery pack. Carpeting and other heat insulating surfaces block proper air circulation which may cause overheating of the charger and battery pack. If smoke or melting of the charger or battery pack is observed, unplug the charger immediately and do not use the battery pack or charger. Contact customer service immediately. Keep the cord and charger from heat to prevent damage to housing or internal parts.Do not allow gasoline, oils, petroleum- based products, etc. to come in contact with plastic parts. These materials contain chemicals that can damage, weaken, or destroy plastic. Make sure cord is located so that it will not be stepped on, tripped over, or otherwise subjected to damage or stress. Damaged plug and cord may result in electric shock or fire. Disconnect the charger by pulling the plug rather than the cord. Do not operate charger with damaged cord or plug; have them replaced immediately. Damaged plug or cord may result in electric shock or fire. Do not insert battery pack in charger if battery pack case is cracked. Using damaged battery pack may result in electric shock or fire. Do not disassemble charger or operate the charger if it has received a sharp blow, been dropped or otherwise damaged in anyway. Incorrect reassembly or damage may result in electric shock or fire. Before each use, check the battery charger, cable and plug. If damage is detected, do not use the battery charger. Never open the battery charger yourself, take it to a FLEX Factory Service Center, or qualified serviceman only using original spare parts. Incorrect reassembly may result in electric shock or fire. Do not touch the uninsulated portion of output connector or uninsulated battery terminal. There is a risk of electric shock. Do not use attachment not recommended or sold by FLEX. Using attachments not recommended may result in electric shock or fire. Do not store battery pack in charger. Battery pack stored in charger over a long period of time could lead to battery pack damage and fire. Unplug charger from outlet before storage, attempting any maintenance or cleaning. Such preventive safety measures reduce the risk of electric shock or fire. Keep the battery charger clean by blowing compressed air on charger vents and wiping the charger housing with a damp cloth. Contamination may result in electric shock or fire.

EXTENSION CORDS
SED UNLESS ABSOLUTELY NECESSARY. Use of improper extension cord could result in risk of fire and electrical shock. If an extension make sure

  •  The extension cord is properly wired and in good electrical condition.
  •  The wire size is large enough for AC ampere rating of charger as specified below:
Length of Cord (Feet) 25 50 100 150
Size of Cord (AWG) 18 16 16 14

Extension Cord Chart for 220/240 Volt Tools:

0.75mm2 CORD| 50 Meters
1.0mm2 CORD| 75 Meters

FCC CAUTION

  1. This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
  2.  This device may not cause harmful interference.
  3.  This device must accept any interference received, including interference that may cause undesired operation.
  4. Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
  • Reorient or relocate the receiving antenna.
  • Increase the separation between the equipment and receiver.
  •  Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
  •  Consult the dealer or an experienced radio/TV technician for help.
  • Some dust created by power sanding, sawing, grinding, drilling and other construction activities contains chemicals known to the State of California to cause cancer, birth defects or other reproductive harm. Some examples of these chemicals are:
    •  Lead from lead-based paints.
    •  Crystalline silica from bricks, cement, and other masonry products.
    •  Arsenic and chromium from chemically-treated lumber.
  • Your risk from these exposures varies, depending upon how often you do this type of work. To reduce your exposure to these chemicals:
    •  Work in a well-ventilated area.
    •  Work with approved safety equipment, such as dust masks that are specially designed to filter out microscopic particles.
    •  Avoid prolonged contact with dust from power sanding, sawing, grinding, drilling, and other construction activities. Wear protective clothing and wash exposed areas with soap and water. Allowing dust to get into your mouth or eyes or to lie on the skin may promote absorption of harmful chemicals.

SYMBOLS

IMPORTANT : Some of the following symbols may be used on your tool. Please study them and learn their meaning. Proper interpretation of these symbols will allow you to operate the tool better and safer.

Symbol Name Designation/Explanation
V Volts Voltage
A Amperes Current
Hz Hertz Frequency (cycles per second)
W Watt Power
kg Kilograms Weight
min Minutes Time
s Seconds Time
Wh Watt-hours Battery capacity
Ah Ampere-hours Battery capacity
ø Diameter Size of drill bits, grinding wheels, etc.
n0 No load speed Rotational speed, at no load
n Rated speed Maximum attainable speed
…/min Revolutions or reciprocations per minute (rpm) Revolutions, strokes,

surface speed, orbits, etc. per minute
O| Off position| Zero speed, zero torque…
1,2,3,…

Ⅰ,Ⅱ,Ⅲ,

|

Selector settings

| Speed, torque, or position settings. Higher

number means greater speed

 | Infinitely variable selector with off| Speed is increasing from 0 setting
 | Arrow| Action in the direction of arrow
 | Alternating current (AC)| Type or a characteristic of current
 | Direct current (DC)| Type or a characteristic of current
 | Alternating or direct current

(AC / DC)

|

Type or a characteristic of current

 |

Class II tool

| Designates Double Insulated Construction tools.
 | Protective earth| Grounding terminal
 |

Li-ion RBRC seal

|

Designates Li-ion battery recycling program

 |

Read the instructions

|

Alerts user to read manual

Symbol Name Designation/Explanation

Wear eye protection symbol

|

Alerts user to wear eye protection

|

Always operate with two hands

|

Alerts user to always operate with two hands

|

Do not use the guard for cut-off operations

|

Do not use the guard for cut-off operations

SYMBOLS (CERTIFICATION INFORMATION)

Symbol Designation/Explanation
**** ****

This symbol designates that this tool is listed by Underwriters Laboratories.


| ****

This symbol designates that this component is recognized by Underwriters

Laboratories.

|

This symbol designates that this tool is listed by Underwriters Laboratories, to United States and Canadian Standards.

|

This symbol designates that this tool is listed by the Canadian Standards Association.

|

This symbol designates that this tool is listed by the Canadian Standards Association, to United States and Canadian Standards.




__



| ****


This symbol designates that this tool is listed by the Intertek Testing Services, to United States and Canadian Standards.

FUNCTIONAL DESCRIPTIONS AND SPECIFICATIONS

FLEX FX0421 280W 24V Charger 1

Rated Input 120V AC, 60Hz, 280W
Rated Output 24V
Battery Compatibility 2.5Ah FX0111
Approximate Charging Time (minutes) 80%

100%
25| 30| 25| 30| 40| 50| 60| 75
Recommended Charging Temperature|

38 – 122°F (3 – 50℃)

Recommended Storage Temperature| < 122℉ (< 50℃)

IMPORTANT CHARGING NOTES

  1.  A substantial drop in operating time per charge may mean that the battery pack is nearing the end of its life and should be replaced.
  2.  Remember to unplug the charger during storage.
  3.  If battery does not charge properly:
  4.  Check for power at the outlet by plugging another electrical device into the outlet.
  5.  Check to see if outlet is connected to a light switch that turns power “off” when the lights are turned off
  6.  Check the battery pack terminals for dirt. Clean with a cotton swab and alcohol, if necessary.
  7.  If proper charging still does not occur, take or send the tool, battery pack and charger to your local FLEX Service Center. Please refer to the Customer Service information on the cover of this manual.

NOTE : Use of chargers or battery packs not sold by FLEX will void the tool warranty.

OPERATING INSTRUCTIONS

personal injury, and product damage due to a short circuit, never immerse your charger or battery pack in fluid or allow a fluid to flow inside them. Corrosive or conductive fluids, such as seawater, certain industrial chemicals, and bleach or bleach-containing products, etc. can cause a short circuit.the charger or create accessories not recommended for use with this charger. Any such alteration or modification is misuse and could result in a hazardous condition leading to possibly serious personal injury.

HOW TO CHARGE THE BATTERY PACK

wet or damp conditions. Water entering the charger will increase the risk of electric shock.
NOTICE : Lithium-Ion battery packs are shipped partially charged. Before using it the first time, fully charge the battery pack.

  •  Connect the charger to the power supply (120V~, 60Hz). When connected to the power supply, the green and red LED indicators on the charger will flash once at the same time and then go out, indicating that the charger elf-inspection is completed.
  •  Align the raised ribs of the battery pack with the slots in the charger and slide the battery pack onto the charger
  •  The charger will communicate with the battery pack to evaluate the condition of the battery pack.
Battery Pack Charge Status Power Indicator
<25% ****



Last segment flashing, the

rest are solid

25%-50%|
50%-75%|

≥75%| ****

  •  When the battery pack is charging, the green LED will flash. The power indicator on the battery will flash according to the current capacity level. The fan in the charger continuously works to cool the battery pack.
  •  Once the battery is 80% charged, the green LED shows solid green, the red/green LED starts flashing green. When the battery pack is fully charged, the red/green LED will remain green without flashing. The power indicator on the battery pack will go out.
  •  The battery pack will fully charge if left on the

Charger Display

Mode

| Green LED on the Charger| Red/Green LED on the Charger| Power Indicator on the Battery pack|

Note

---|---|---|---|---
Self-inspection completed|

Flashing once

| Flashing red once|

Off

| Red and Green LED flash once at the same time
Self-inspection failed|

Off

|

Off

|

Off

| No reaction when the charger is plugged in

Standby

|

Off

|

Off

|

Off

| Plugged in; battery pack is not on the charger

Charging

| Flashing| Off| Flashing according to the current capacity level.| Battery is less than 80% charged
Steady| Flashing green| Battery is 80% charged
Full Charge| Steady| Steady| Off|

Cold/Hot Battery

|

Off

|

Steady

|

Off

| Remove the battery pack from the charger
Error| Off| Flashing red or off| Off| Battery pack

or charger error

CHARGING A HOT OR COLD BATTERY PACK
A steady red LED indicates that the battery is over or under the optimal temperature. Remove the battery pack from the charger. If the battery is too hot, cool the battery under air flow. If the battery is too cold, place it indoors until it reaches room temperature.
CHARGER ERROR
If the charger self-inspection fails to react when the charger is plugged in, the causes include no power to the charger, bad contacts, or a charger error. Check to see if the charger self-inspection can be activated when the charger is plugged in again or plugged into a different outlet. If  it still fails, have the charger serviced by an Authorized FLEX Service Station.

BATTERY PACK ERROR
If the charger detects a problem, the red/green LED will begin flashing red. Remove and re-insert the battery pack in the charger. If the red/green LED still flashes red, try charging a different battery pack.

  •  If a different battery pack charges normally, have the first malfunctioning battery pack serviced by an Authorized FLEX Service Station.
  •  If a different battery pack also indicates an error, the charger may be malfunctioning. Have the charger serviced by an Authorized FLEX Service Station.

WALL-MOUNT HOLES
The charger has wall-mount holes for convenient storage. Install screws in the wall 3 inches (76mm) apart. Use screws sufficiently strong to hold the combined weight of the charger and battery pack.

MAINTENANCE

GENERAL MAINTENANCE
Periodically inspect the entire product for damaged, missing, or loose parts such as screws, nuts, bolts, caps, etc. Securely tighten all fasteners and caps and do not operate this product until all missing or damaged parts are replaced. Please contact customer service or an authorized service center for assistance.
CLEANING
compressed air.Ventilation openings and switch selectors must be kept clean and free of foreign matter. Do not attempt to clean
STORAGE
Store the tool indoors in a place that is inaccessible to children. Keep away from corrosive agents.

FLEX 5 YEAR LIMITED WARRANTY

Chervon North America, Inc. (“Seller”) warrants to the original purchaser only, that all FLEX 24V products will be free from defects in material or workmanship for a period of five years from date of purchase when the original purchaser registers the product within 30 days from the date of original retail purchase and retains their receipt as proof of purchase. THE 5-YEAR LIMITED WARRANTY PERIOD IS CONDITIONED ON REGISTRATION OF THE PRODUCT WITHIN 30 DAYS OF PURCHASE AND ONLY APPLICABLE TO FLEX 24V TOOLS, BATTERIES AND CHARGERS. If the original purchaser does not register their product within 30 days, the foregoing limited warranty will apply for a duration of three years. Product registration can be completed online at www.registermyflex.com. 24V Tools: 5-Year Limited Warranty with Registration 24V Batteries and Chargers: 5-Year Limited Warranty with Registration Corded, 12V and 20V FLEX Legacy Products: 1-Year Limited Warranty, No Registration Benefit Accessories and Attachments: No Warranty SELLER’S SOLE OBLIGATION AND YOUR EXCLUSIVE REMEDY under this 5-Year Limited Warranty and, to the extent permitted by law, any warranty or condition implied by law, shall be the repair or replacement of parts, without charge, which are defective in material or workmanship and which have not been misused, carelessly handled, or repaired by persons other than a FLEX Authorized Service Dealer. This warranty does not cover part failure due to normal wear and tear. To make a claim under warranty, return the complete product, transportation prepaid, to any FLEX Authorized Service Dealer. For Authorized FLEX Service Dealers, please visit www.registermyflex.com or call 1-833-FLEX-496 (1-833-353-9496).
This 5-Year Limited Warranty does not apply to accessories, attachments or parts. Any implied warranties applicable to a product shall be limited in duration equal to the duration of the express warranties applicable to such product, as set forth in the first paragraph above. Some states in the U.S. and some Canadian provinces do not allow limitations on how long an implied warranty lasts, so the above limitation may not apply. FLEX is not responsible for direct, indirect, incidental or consequential damages. Some U.S. states and Canadian provinces 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 or exclusions may not apply. This limited warranty gives you specific legal rights, and you may also have other rights which vary by state in the U.S. and by province in Canada. This limited warranty applies only to products sold within the United States of America, Canada and the commonwealth of Puerto Rico. For warranty coverage within other countries, contact your local FLEX dealer. © Chervon North America, 1203 E. Warrenville Rd., Naperville, IL 60563

  • www.flexpowertools.com
  • www.registermyflex.com
  • 1-833-FLEX-496 (1-833-353-9496)

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