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Symptom
Probable Cause
Corrective Action
Motor shaft rotates without abnormal
noise when Gear assembly is removed.
Replace Rotor.
Replace broken gear(s) or Gear
assembly.
Motor shaft does not rotate even though
the gear section is removed.
The remaining battery capacity is too
low.
Charge Battery.
The contacts of Battery and the
machine have dust.
Remove the dust.
The connector of Switch is not
connected.
Connect it securely.
Stator is broken.
Replace Stator.
Controller is broken.
Replace Controller.
Switch is broken.
(Broken Switch body, Connector or
Lead wires.)
Replace Switch.
Rotor is broken.
Replace Rotor.
Spur gear of Rotor is broken.
Gear assembly is broken.
Battery is inactive, broken or its
service life has expired.
Replace Battery.