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Trouble shooting
Whenever you find any trouble in your machine, first, refer to this list to check the machine for solution.
(1) Use the full charged battery which has the star mark. (Fig. D-4)
(2) When Housing is disassembled, check the conditions of the electrical parts
(Connectors, Lead wires, Switches, etc.), Armature, Stator, Gear section, etc.
(3) Do the running test in Low speed mode (when the trigger is being pulled just a little)
to check the following functions by repeating 10 times;
• F/R change lever • Operation mode change ring • High/Low speed change lever
• Variable speed control trigger
Note in Repairing
Check List for Trouble Shooting
Motor runs when the machine
is switched on.
In case of running inconstantly,
go to “No”.
LED indicator lamps
are on.
LED job light are on.
The machine does not
have any trouble.
Symptom Cause Corrective action
Rotation speed can
be changed.
Forward/ Reverse
rotation are OK
Controller is broken. Replace Stator complete.
(See the next page.)
Connect it firmly.
Check Lead wires,
or replace it.
LED indicator lamps
are on.
Switch is broken.
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
Controller is broken.
Rotor is broken.
Stator is broken.
Replace Stator complete.
(See the next page.)
No
Controller is broken.
Connectors are in incomplete
connection.
Lead wires are broken.
Replace Stator complete.
Check the items from the top of the following list. (Description of the item is referred to Circuit diagram in Fig. D-1.)
Change Stator complete if your problem cannot be solved although its corrective action has been carried out.
Check Terminal,
or replace it.
Replace Switch.
Replace Rotor.
Replace Stator complete.
Switch is broken.
Replace Switch.
Connect it firmly.
Check Lead wires,
or replace it.
LED circuit is broken.
Connectors are in incomplete
connection.
Lead wires are broken.
Replace LED circuit.
Switch is broken. Replace Switch.
LED job light are on.
Rotor is rubbed to
Stator.
Yes
Yes
No
Connect it firmly.
Check Lead wires,
or replace it.
Connectors are in incomplete
connection.
Lead wires are broken.
Switch is broken. Replace Switch.
LED is broken.
Replace LED.
Terminal is broken.
Star mark
Fig. D-4
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