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● To avoid injury from an accidental start, turn the switch OFF and remove the plug from the power source
or remove the battery from the main body before making any adjustments.
● All electrical or mechanical repairs should be done only by qualifi ed service technicians. Contact Hitachi
Authorized Service Center.
Problem
Tool doesn't run
Tool suddenly stopped
Tool bits
-can't be attached
-fall off
Switch can't be pulled
Screw head slips or comes
loose.
Holes can't be smoothly
drilled.
Battery will not charged.
20
TROUBLESHOOTING GUIDE
WARNING
Possible Cause
No remaining battery power
Battery isn't securely attached.
Tool was overburdened
Battery or tool overheated
The shape of the attachment portion
doesn't match
The lock of the keyless chuck is worn
Forward/reverse selector button is
positioned halfway
Bit number doesn't match with the screw
size
The bit is worn
The drill is worn
Rotation speed isn't appropriate
The drill is rotating in reverse
Battery not installed into charger properly. Insert battery into charger until charge
Charger not plugged in.
Battery temperature too hot
Battery temperature too cold
Possible Solution
Charge the battery.
Push in the battery until a click is heard.
Remove the cause of the overburdening.
Allow the tool and battery to thoroughly
cool.
The chucking diameter of the keyless
chuck is 1/16 in (1.5 mm) to 1/2 in (13 mm).
Use a bit that falls within the stated range.
Contact a Hitachi Authorized Service
Center and arrange to have the old keyless
chuck replaced with a new one.
Press the button fi rmly into position for the
desired direction of rotation.
Install a suitable bit.
Replace with a new bit.
Replace with a new drill.
Adjust the rotation speed (HIGH/LOW) to
match the material to be drilled.
Switch to forward rotation.
status lamp (red) appears.
Plug charger into a working receptacle.
Remove battery from charger, cool battery.
For more detail, refer to "Charging
Method".
Remove battery from charger, move
battery and charger to a surrounding air
temperature of above 32°F (0°C).
For more detail, refer to "Changing
Method".
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