Panasonic Cordless Angle Grinder EY46A2 Operating Instructions

							- 11  -  
Attaching or Removing 
Battery Pack
 CAUTION
Before inserting battery pack, check that 
the power switch on the tool actuates 
properly and returns to the “OFF” 
position when released.
1.  To connect the battery pack:
  Align the highlighted marker pointsand attach battery pack.
•  Slide the battery pack until it locks  into position.
Alignment 
marks
2.  To remove the battery pack:
  Push down the button and slide the battery pack forward.
Button
IV. OPERATION
NOTE:
Be aware that this tool is always in an 
operating condition, since it does not have 
to be plugged into an electrical outlet.
Power switch operation
 CAUTION
•  Before inserting the battery pack into the tool, always make sure that 
the power switch operates properly 
and returns to the “OFF” position 
when the rear of the power switch is 
depressed.
•  Power switch can be locked in “ON”  position. Stay alert when locking tool 
in “ON” position and grasp the tool 
firmly using support handle and grip.
  
To start operation, press and slide the
power switch toward the “ON” position.
For continuous operation, press the
front of the power switch to lock it.
To stop the tool, press the rear of the
power switch, then it returns to the
“OFF” position.
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JOEE





 
						

							- 12 - 
 WARNING
•  It should never be necessary to force the tool. The weight of the tool 
applies adequate pressure. Forcing 
and excessive pressure could cause 
dangerous grinding disc breakage.
•  ALWAYS replace grinding disc if tool  is dropped while grinding.
•  NEVER bang or hit grinding disc.
•  Avoid bouncing and snagging the  grinding disc, especially when 
working corners, sharp edges etc. 
This can cause loss of control and 
kickback.
 CAUTION
After operation, always switch off the 
tool and wait until the wheel has come to 
a complete stop before putting the tool 
down.
Visual inspection and workout 
test on disc
1.  Always make sure that the disc has no  cracks before use.
2.  Always give workout test on the blade  as follows.
3.  Always make sure the disc is firmly  fixed.
Work out time
Brand new disc more than 3 min. Before use on  current disc more than 1 min.
Grinding operation
B15°~30°A
ALWAYS hold the tool firmly with one 
hand on grip and the other on the 
support handle. Turn on the tool and 
then apply the wheel or disc to the 
workpiece.
In general, keep the edge of the wheel 
or grinding disc at an angle of about 
15º-30º to the workpiece surface.
When using a new grinding disc, do 
not work the grinder in the B direction 
or it will cut into the workpiece. Once 
the edge of the grinding disc has 
been rounded off by use, the grinding 
disc may be worked in both A and B 
direction.
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JOEE





 
						

							- 13 -  
Using a cut-off disc guard 
(Available as an accessory, not 
included)
1
3
2
Make sure the side.
1. Clamp nut
2. Cut-off disc
3. Disc flange
4. Spindle
4
 WARNING
•  When using an abrasive cut-off disc, be sure to use only the cut-off disc 
guard designed for this use with 
cut-off disc.
•  NEVER use cut-off disc for grinding.
•  Do not jam the Disc or apply  excessive pressure. Do not attempt 
to make an excessive depth of 
cut. Overstressing the cut-off 
disc increases the loading and 
susceptibility to twisting or binding 
of the cut-off disc in the cut and the 
possibility of kickback, cut-off disc 
breakage and overheating of the 
motor may occur.
•  Do not start when disc is in the  workpiece. To do so causes the 
cut-off disc binding or kickback. Let 
the cut-off disc reach full speed and 
then carefully cut the workpiece.
•  During cutting operations, never  change the angle of the disc. Placing 
side pressure on the cut-off disc 
(as in grinding) will cause the disc 
to crack and break, causing serious 
personal injury.
 CAUTION
•  To prevent excessive temperature increase of the tool surface, do not 
operate the tool continuously using 
two or more battery packs. The tool 
needs cool-off time before switching 
to another pack.
•  Do not close up ventilation slots  on the sides of the body during 
operation. Otherwise, the machine 
function is adversely affected to 
cause a failure.
•  Do not strain the tool (motor). This  may cause damage to the unit. •  Use the tool in such a way as to 
prevent the air from the ventilation 
slots from blowing directly onto your 
skin. Otherwise, you may get burned.
Indicator lamp for On lock 
start prevention function
The grinder will not start when the 
battery pack is inserted with the switch 
at the ON position (switch lever at ON).
The warning lamp will flash at this 
time to indicate that the ‘On lock start 
prevention function’ has operated.
Press the switch to the OFF position 
(switch lever at OFF) and then press it 
back to the ON position (switch lever at 
ON) to start the grinder.
ONàOFF OFF àON
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JOEE





 
						

							- 14 - 
Overheat warning lamp
Off  
(normal 
operation) Flashing: Overheat 
Indicates operation has 
been halted due to battery 
overheatin
g.
To protect the battery, be sure to note 
the following when carrying out this 
operation.
•  If the battery becomes hot, the  protection function will be activated 
and the motor or battery will stop 
operating. The overheat warning lamp 
on the control panel illuminates or 
flashes when this feature is active.
•  If the overheating protection feature  activates, allow the tool to cool 
thoroughly (at least 30 minutes). 
The tool is ready for use when the 
overheat warning lamp goes out.
•  Avoid using the tool in a way that  causes the overheating protection 
feature to activate repeatedly.
•  If the tool is operated continuously  under high-load conditions or if it is 
used in hot-temperature conditions 
(such as during summer), the 
overheating protection feature may 
activate frequently.
•  If the tool is used in cold-temperature  conditions (such as during winter) or 
if it is frequently stopped during use, 
the overheating protection feature 
may not activate.
•  The performance of the EY9L42  deteriorates significantly at and below 
10°C due to work conditions and 
other factors.
•  The ambient temperature range  is between 0°C (32°F) and 40°C 
(104°F).  If the battery pack is used 
when the battery temperature is 
below 0°C (32°F), the tool may fail to 
function properly.
•  When charging a cool battery pack  (below 0°C (32°F)) in a warm place, 
leave the battery pack at the place 
and wait for more than one hour to 
warm up the battery to the level of the 
ambient temperature.
Battery low warning lamp
Off 
(normal 
operation)Flashing
(No charge)
Battery protection feature 
active
Excessive (complete) discharging of 
lithium ion batteries shortens their 
service life dramatically. The tool 
includes a battery protection feature 
designed to prevent excessive 
discharging of the battery pack.
•  The battery protection feature activates  immediately before the battery loses 
its charge, causing the battery low 
warning lamp to flash.
•  If you notice the battery low warning  lamp flashing, charge the battery pack 
immediately.
•  If it is started with too little battery  power remaining, the tool may stop 
operating without the battery low 
warning lamp flashing first. This 
indicates that there is too little battery 
power remaining to use the tool, and 
the battery pack should be charged 
before further use.
•  If the tool is subject to a sudden load  during use that causes the motor to 
lock up, the overdischarge prevention 
sensor may be triggered, and the 
battery low warning lamp may flash. 
The lamp will stop flashing once you 
address the cause of the motor’s 
locking up and cycle the trigger.
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JOEE





 
						

							- 15 -  
[Battery Pack]
For Appropriate Use of 
Battery pack
Li-ion Battery pack 
•  For optimum battery life, store the Li-ion battery pack following use 
without charging it.
•  When charging the battery pack,  confirm that the terminals on the 
battery charger are free of foreign 
substances such as dust and 
water etc. Clean the terminals before 
charging the battery pack if any 
foreign substances are found on the 
terminals.
  The life of the battery pack terminals  may be affected by foreign subs-
tances such as dust and water etc. 
during operation.
•  When battery pack is not in use, keep  it away from other metal objects like: 
paper clips, coins, keys, nails, screws, 
or other small metal objects that can 
make a connection from one terminal 
to another.
  Shorting the battery terminals together  may cause sparks, burns or a fire.
•  When operating the battery pack,  make sure the work place is well 
ventilated.
•  When the battery pack is removed  from the main body of the tool, replace 
the battery pack cover immediately 
in order to prevent dust or dirt from 
contaminating the battery terminals 
and causing a short circuit.
Battery Pack Life
The rechargeable batteries have 
a limited life. If the operation time 
becomes extremely short after 
recharging, replace the battery pack 
with a new one.
Battery Recycling
ATTENTION:
For environmental protection and 
recycling of materials, be sure that it 
is disposed of at an officially assigned 
location, if there is one in your country.
Recommendations for use
Terminals
Label Pack cover
Be sure to use the Pack cover
•  When the battery pack is not being used, 
store the battery in a way that foreign 
substances such as dust and water etc. do 
not contaminate the terminals. Be sure to 
attach the battery pack cover to protect the 
battery terminals.
•  When charging the battery pack, confirm  that the terminals on the battery charger 
are free of foreign substances such as dust 
and water etc. Clean the terminals before 
charging the battery pack if any foreign 
substances are found on the terminals. 
The life of the battery pack terminals may 
be affected by foreign substances such as 
dust and water etc. during operation.
 CAUTION
To protect the motor or battery, be sure 
to note the following when carrying out 
operation. 
•  If the battery becomes hot, the protection function will be activated 
and the battery will stop operating. The 
overheat warning lamp on the control 
panel illuminates or flashes when this 
feature is active.
For safe use
•  The battery pack is designed to be installed by proceeding two steps for safety. Make 
sure the battery pack is installed properly to 
the main unit before use.
•  If the battery pack is not connected firmly  when the switch is switched on, the 
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JOEE





 
						

							- 16 - 
overheat warning lamp and the battery low 
warning lamp will flash to indicate that safe 
operation is not possible, and the main unit 
will not rotate normally. Connect the battery 
pack into the unit of the tool until the red or 
yellow label disappears.
[Battery Charger]
Charging
 CAUTION
•  The charger is designed to operate on standard domestic electrical 
power only as stated in the rating 
plate. Charge only on the voltage 
indicated on the rating plate of unit. 
e.g.230V / 50Hz.
•  Do not attempt to use it on any other  voltage or frequency rating.
•  The ambient temperature range is 
between 0°C (32°F) and 40°C (104°F).
•  If the battery pack is used when the 
battery temperature is below 0°C 
(32°F), the tool may fail to function 
properly.
•  If the temperature of the battery pack 
falls approximately below 0°C ( 32°F), 
charging will automatically stop to 
prevent degradation of the battery.
•  Use the charger at temperatures 
between 0°C and 40°C, and charge 
the battery at a temperature similar 
to that of the battery itself. (There 
should be no more than a 15°C 
difference between the temperatures 
of the battery and the charging 
location.)
•  When charging a cool battery pack 
(below 0°C (32°F) in a warm place, 
leave the battery pack at the place 
and wait for more than one hour to 
warm up the battery to the level of 
the ambient temperature.
•  Cool down the charger when  charging more than two battery 
packs consecutively.
•  Do not insert your fingers into  contact hole, when holding charger 
or any other occasions.
•  To prevent the risk of fire or damage  to the battery charger.
  1.  Do not use power source from an  engine generator.
  2.  
Unplug the charger when not in 
use.
NOTE:
Your battery pack is not fully charged
at the time of purchase. Be sure to 
charge the battery before use.
How to charge
1.  Plug the charger into the AC outlet.
NOTE:
Sparks may be produced when the plug 
is inserted into the AC power supply, but 
this is not a problem in terms of safety.
2.  Connect the battery pack firmly into the  charger.
1.  Line up the alignment marks and place the battery onto the dock on 
the charger.
2.  Slide forward in the direction of the  arrow.
Alignment
marks
3.  During charging, the charging lamp will be illuminated. When charging is 
completed, an internal electronic switch 
will automatically be triggered to prevent 
overcharging.
•  Charging will not start if the  battery pack is warm (for example, 
immediately after heavy-duty 
operation).The orange standby 
lamp will be flashing until the battery 
cools down.Charging will then begin 
automatically.
4.  The charge lamp (green) will flash  slowly once the battery is approximately 
80% charged.
5.  When charging is completed, the  charging lamp in green color will turn off.
6.  If the temperature of the battery pack  is 0°C or less, charging takes longer to 
fully charge the battery pack than the 
standard charging time.
Even when the battery is fully charged, 
it will have approximately 50% of the 
power of a fully charged battery at 
normal operating temperature.
7.  Consult an authorized dealer if the  charging lamp (green) does not turn off.
8.  If a fully charged battery pack is inserted  into the charger again, the charging 
lamp lights up. After several minutes, the 
charging lamp in green color will turn off.
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JOEE





 
						

							- 17 -  
LAMP INDICATIONS
Charging is completed. (Full charge.)
Battery is approximately 80% charged. 
Now charging.
Charger is plugged into the AC outlet. Ready to charge.
Charging Status Lamp.
Left: green  Right: orange will be displayed.
Battery pack is cool.
The battery pack is being charged slowly to reduce the load on the batte\
ry. 
Battery pack is warm. Charging will begin when temperature of battery pack drops. If the tempe\
rature of the 
battery pack is -10° or less, the charging status lamp (orange) wil\
l also start flashing .
Charging will begin when the temperature of the battery pack goes up
Charging is not possible. Clogged with dust or malfunction of the bat-
tery pack.
   Turn off    Illuminated    Flashing
(Green) (Orange)
Information for Users on Collection and Disposal of Old 
Equipment and used Batteries
These symbols on the products, packaging, and/or accompanying 
documents mean that used electrical and electronic products and batterie\
s 
should not be mixed with general household waste. 
For proper treatment, recovery and recycling of old products and used 
batteries, please take them to applicable collection points, in accordan\
ce with 
your national legislation and the Directives 2002/96/EC and 2006/66/EC.
By disposing of these products and batteries correctly, you will help to save 
valuable resources and prevent any potential negative effects on human 
health and the environment which could otherwise arise from inappropriat\
e 
waste handling.
For more information about collection and recycling of old products and \
batteries, please contact your local municipality, your waste disposal service 
or the point of sale where you purchased the items.
Penalties may be applicable for incorrect disposal of this waste, in 
accordance with national legislation.
For business users in the European Union
If you wish to discard electrical and electronic equipment, please conta\
ct your dealer or 
supplier for further information.
[Information on Disposal in other Countries outside the European Union]
These symbols are only valid in the European Union. If you wish to disca\
rd these items, 
please contact your local authorities or dealer and ask for the correct \
method of disposal.
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JOEE





 
						

							- 18 - 
Replacing carbon brushes
Keep the carbon brushes clean and 
free to slip in the holders. When it is 
less than 5 mm shorter both carbon 
brushes should be replaced at the 
same time. Use only identical carbon 
brushes.
Carbon brush
Brush cap
Screw driver
Use a screwdriver to remove the caps. 
Take out the worn carbon brushes, 
insert the new ones and secure the 
brush caps.
To maintain product SAFETY and 
RELIABILITY, repairs, any other 
maintenance or adjustment should be 
performed by Panasonic Authorized or 
Factory Service Centers, always using 
Panasonic replacement parts.
V. MAINTENANCE
•   Use only a dry, soft cloth for wiping the unit. Do not use a damp cloth, thinner, 
benzine, or other volatile solvents for 
cleaning.
•   In the event that the inside of the tool or  battery pack is exposed to water, drain 
and allow to dry as soon as possible. 
Carefully remove any dust or iron 
filings that collect inside the tool. If you 
experience any problems operating the 
tool, consult with a repair shop.
VI. ACCESSORIES
 CAUTION
•  The use of any accessories not specified in this manual may 
result in fire, electric shock, or 
personal injury. Use recommended 
accessories only.
•  Your tool is supplied with a guard  for use with a grinding disc. A cut-off 
disc can also be used with a cut-off 
disc guard. 
Grinding Disc
•  Rated speed: greater than or equal to 72m/min
• Max. wheel diameter:  Φ 125mm
• Hole diameter:  Φ 22mm
• Max. thickness: 6mm
Grinding Disc Guard
•  WEY46A2K3747
Cut-off Disc
•  Rated speed: greater than or equal  to 72m/min
•  Max. wheel diameter:  Φ125mm
•  Hole diameter:  Φ 22mm
•  Flat disc only
Cut-off Disc Guard (For cut-off disc)
• WEY46A2K3137
Disc Flange
• EY4640K1168
Clamp Nut
• WEY4640K1178
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JOEE





 
						

							- 19 -  
VII. SPECIFICATIONS
MAIN UNIT
Mounting wheel diameterΦ125 mm
Spindle thread size M14
Mounting wheel hole diameter  22 mm
Weight 1.65 kg (main unit only)
Overall length 300 mm (main unit only)
Noise, Vibration See the included sheet
Motor voltage DC 14.4 VDC 18 V
Rated speed 8000min
-1 (rpm)10000min-1 (rpm)
BATTERY PACK
Model No.EY9L41 EY9L42 EY9L44 EY9L45 EY9L50 EY9L51
Storage battery Li-ion Battery
Battery voltage DC 14.4 VDC 18 V
BATTERY CHARGER
Model No. EY0L82
Electrical rating See the rating plate on the bottom of charger
Weight 0.93 kg
Charging 
time Model No.
EY9L41 EY9L42 EY9L44 EY9L45 EY9L50 EY9L51
Usable 35 min. 30 min. 40 min. 50 min. 40 min. 55 min.
Full 50 min. 35 min. 55 min. 60 min. 55 min. 70 min.
NOTE:  
This chart may include models that are not available in your area.
Please refer to the latest general catalogue.
For the dealer name and address, please see the included warranty card.
VIII. APPENDIX
WARRANTY SUPPLEMENT
•  The breakdown and damage caused by usage consistent for a long time (e.\
g.: 
factory work on the assembly line, etc.) is out of warranty.
•  Damage or failure caused by use of accessories that are not specified in\
 this  manual will not be covered by warranty.
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JOEE





 
						

							- 20 - 
ONLY FOR U.K.
IX.  ELECTRICAL 
PLUG INFOR-
MATION
FOR YOUR SAFETY PLEASE READ 
THE FOLLOWING TEXT CAREFULLY
This appliance is supplied with a moulded 
three pin mains plug for your safety and 
convenience.
A 5 amp fuse is fitted in this plug.
Should the fuse need to be replaced 
please ensure that the replacement 
fuse has a rating of 5 amp and that it is 
approved by ASTA or BSI to BS1362.
Check for the ASTA mark 
 or the BSI 
mark 
 on the body of the fuse.
If the plug contains a removable fuse cover 
you must ensure that it is refitted when the 
fuse is replaced.
If you lose the fuse cover the plug must 
not be used until a replacement cover is 
obtained.
A replacement fuse cover can be 
purchased from your local Panasonic 
Dealer.
IF THE FITTED MOULDED PLUG IS 
UNSUITABLE FOR THE SOCKET 
OUTLET IN YOUR HOME THEN THE 
FUSE SHOULD BE REMOVED AND THE 
PLUG CUT OFF AND DISPOSED OF 
SAFELY.
THERE IS A DANGER OF SEVERE 
ELEC¬TRICAL SHOCK IF THE CUT OFF 
PLUG IS INSERTED INTO ANY 13 AMP 
SOCKET.
If a new plug is to be fitted please observe 
the wiring code as shown below.
If in any doubt please consult a qualified 
electrician.
IMPORTANT:
The wires in this mains lead are 
coloured in accordance with the 
following code:
Blue: Neutral
Brown: Live
As the colours of the wire in the mains 
lead of this appliance may not correspond 
with the coloured markings identifying the 
terminals in your plug, proceed as follows.
The wire which is coloured BLUE must be 
connected to the terminal in the plug which 
is marked with the letter N or coloured 
BLACK.
The wire which is coloured BROWN 
must be connected to the terminal in the 
plug which is marked with the letter L or 
coloured RED.
Under no circumstances should either 
of these wires be connected to the earth 
terminal of the three pin plug, marked with 
the letter E or the Earth Symbol 
.
How to replace the fuse: Open the fuse 
compartment with a screwdriver and 
replace the fuse and fuse cover if it is 
removable.
Fuse Cover
This apparatus was produced to BS800.
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JOEE