Charger Operation - DeWalt DHS780 Original Instructions Manual

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• Ensure the operator is adequately trained in the use, adjustment and operation of the machine.
• Before working select the correct saw blade for the material to be cut.
• Use only saw blades where the speed marked on the saw blade is at least equal to the speed
marked on the rating blade.
• Ensure before each cut that the machine is located on an even and stable surface to
prevent movement.
Residual Risks
In spite of the application of the relevant safety regulations and the implementation of safety
devices, certain residual risks cannot be avoided. These are:
• Impairment of hearing.
• Risk of personal injury due to flying particles.
• Risk of burns due to accessories becoming hot during operation.
• Risk of personal injury due to prolonged use.
Electrical Safety
This machine has been designed to different voltages—battery supply 2x 54V and AC supply
115V or 230V. Always check that the battery pack voltage corresponds to the voltage on
the rating plate. Also make sure that the voltage of your corded power supply and charger
corresponds to that of your mains.
Your D WALT tool, charger and corded power supply are double insulated in
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accordance with EN61029 and EN60335; therefore no earth wire is required.

WARNING: 115 V units have to be operated via a fail-safe isolating transformer with an
earth screen between the primary and secondary winding.
Mains Plug Replacement
(U.K. & Ireland Only)
If a new mains plug needs to be fitted:
• Safely dispose of the old plug.
• Connect the brown lead to the live terminal in the plug.
• Connect the blue lead to the neutral terminal.

WARNING: No connection is to be made to the earth terminal.
Follow the fitting instructions supplied with good quality plugs. Recommended fuse for the
charger: 3 A. Recommended fuse for the corded power supply: 13A.
Using an Extension Cable for Your Charger or Corded Power
Supply
An extension cord should not be used unless absolutely necessary. Use an approved extension
cable suitable for the power input of your charger or corded power supply (see Technical
Data). The minimum conductor size is 1.5 mm
When using a cable reel, always unwind the cable completely.
Using the DCB500 Corded Power Supply
The D WALT corded power supply is designed to
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provide power for D WALT 2x 54 V FLEXVOLT™ cordless
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tools. Insert the corded power supply into the mitre
saw battery slot (refer to Installing and Removing the
Corded Power Supply and Figure D) and plug the
power supply into an AC outlet. The power supply will
act as the power source to the tool. Your D
corded power supply should only be used with
standard 230V household electric power supply. UK 115V units should be plugged into a
115V transformer.
The corded power supply is suitable for use with double insulated 2x 54V AC tools. The EU
model of DCB500 has no ground contact.
Your D WALT corded power supply should only be used with a power supply corresponding
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to the voltage on the rating plate of the DCB500 and not with DC power sources. Please
check that the current rating of the tool is smaller or equal to the current rating of the power
supply adapter.
Additional Specific Usage Instructions
The corded power supply may become warm to the touch during use. This is a normal
condition and does not indicate a problem.
iMPORTAnT. The power supply is not user serviceable. There are no user serviceable parts
inside the power supply. Cord replacement may be conducted at an authorized service centre.
SAVE THESE INSTRUCTIONS
Chargers
D WALT chargers require no adjustment and are designed to be as easy as possible to operate.
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Important Safety Instructions for All Battery Chargers
SAVE THESE INSTRUCTIONS: This manual contains important safety and operating
instructions for compatible battery chargers (refer to Technical Data).
• Before using charger, read all instructions and cautionary markings on charger, battery pack,
and product using battery pack.

WARNING: Shock hazard. Do not allow any liquid to get inside charger. Electric shock
may result.

WARNING: We recommend the use of a residual current device with a residual current
rating of 30mA or less.
10
2 ; the maximum length is 30 m.
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CAUTION: Burn hazard. To reduce the risk of injury, charge only D
batteries. Other types of batteries may burst causing personal injury and damage.

CAUTION: Children should be supervised to ensure that they do not play with
the appliance.
NOTICE: Under certain conditions, with the charger plugged into the power supply, the
exposed charging contacts inside the charger can be shorted by foreign material. Foreign
materials of a conductive nature such as, but not limited to, steel wool, aluminum foil
or any buildup of metallic particles should be kept away from charger cavities. Always
unplug the charger from the power supply when there is no battery pack in the cavity.
Unplug charger before attempting to clean
• DO NOT attempt to charge the battery pack with any chargers other than the ones in
this manual. The charger and battery pack are specifically designed to work together.
• These chargers are not intended for any uses other than charging D
rechargeable batteries. Any other uses may result in risk of fire, electric shock
or electrocution.
• Do not expose charger to rain or snow.
• Pull by plug rather than cord when disconnecting charger. This will reduce risk
of damage to electric plug and cord.
• Make sure that cord is located so that it will not be stepped on, tripped over, or
otherwise subjected to damage or stress.
Do not use an extension cord unless it is absolutely necessary. Use of improper
•
extension cord could result in risk of fire,electric shock, or electrocution.
• Do not place any object on top of charger or place the charger on a soft surface
that might block the ventilation slots and result in excessive internal heat. Place the
charger in a position away from any heat source. The charger is ventilated through slots in the
top and the bottom of the housing.
• Do not operate charger with damaged cord or plug—have them replaced immediately.
• Do not operate charger if it has received a sharp blow, been dropped, or otherwise
damaged in any way. Take it to an authorised service centre.
• Do not disassemble charger; take it to an authorised service centre when service or
repair is required. Incorrect reassembly may result in a risk of electric shock, electrocution
or fire.
• In case of damaged power supply cord the supply cord must be replaced immediately by the
manufacturer, its service agent or similar qualified person to prevent any hazard.
Disconnect the charger from the outlet before attempting any cleaning. This will
•
reduce the risk of electric shock. Removing the battery pack will not reduce this risk.
• NEVER attempt to connect two chargers together.
• The charger is designed to operate on standard 230V household electrical power. Do
not attempt to use it on any other voltage. This does not apply to the vehicular charger.
Charging a Battery (Fig. B)
1. Plug the charger into an appropriate outlet before inserting battery pack.
2. Insert the battery pack 22 into the charger, making sure the battery pack is fully seated
in the charger. The red (charging) light will blink repeatedly indicating that the charging
process has started.
3. The completion of charge will be indicated by the red light remaining ON continuously.
The battery pack is fully charged and may be used at this time or left in the charger. To
remove the battery pack from the charger, push the battery release button
battery pack.
nOTE: To ensure maximum performance and life of lithium-ion battery packs, charge the
battery pack fully before first use.

Charger Operation

Refer to the indicators below for the charge status of the battery pack.
Charge Indicators
Charging
Fully Charged
Hot/Cold Pack Delay*
* The red light will continue to blink, but a yellow indicator light will be illuminated during this
operation. Once the battery pack has reached an appropriate temperature, the yellow light
will turn off and the charger will resume the charging procedure.
The compatible charger(s) will not charge a faulty battery pack. The charger will indicate faulty
battery by refusing to light or by displaying problem pack or charger blink pattern.
nOTE: This could also mean a problem with a charger.
If the charger indicates a problem, take the charger and battery pack to be tested at an
authorised service centre.
Hot/Cold Pack Delay
When the charger detects a battery pack that is too hot or too cold, it automatically starts a
Hot/Cold Pack Delay, suspending charging until the battery pack has reached an appropriate
temperature. The charger then automatically switches to the pack charging mode. This feature
ensures maximum battery pack life.
A cold battery pack will charge at a slower rate than a warm battery pack. The battery pack
will charge at that slower rate throughout the entire charging cycle and will not return to
maximum charge rate even if the battery pack warms.
The DCB118 charger is equipped with an internal fan designed to cool the battery pack. The
fan will turn on automatically when the battery pack needs to be cooled. Never operate the
WALT rechargeable
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32 on the