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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.
1. Power tool
Symptom
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 cannot be
installed
2. Charger
Symptom
The charge indicator lamp
is rapidly fl ickers purple,
and battery charging
doesn't begin.
22
TROUBLESHOOTING GUIDE
WARNING
Possible cause
No remaining battery power
Battery isn't securely attached.
Tool was overburdened
Reactive force control was activated
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
Attempting to install a battery other than
that specifi ed for the tool.
Possible cause
The battery is not inserted all the way.
There is foreign matter in the battery
terminal or where the battery is attached.
Remedy
Charge the battery.
Push in the battery until a click is heard.
Remove the cause of the overburdening.
See "Reactive force control".
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.
Please install a multi volt type battery.
Remedy
Insert the battery fi rmly.
Remove the foreign matter.
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