10.1 Troubleshooting for gearmotor
Trouble
Cause
Troubleshooting
The motor does
not
rotate
without load
Failure of power
supply
Check the power source. Contact the power
supply company.
Disconnection of wire
Check the electric circuit and repair the defect.
Bad contact of switch
Repair or barter
Open circuit exist
Check the electric circuit and repair the defect.
Disconnection of
stator coil
Measure resistance of winding & insulation,
distinguish defect of winding defects of winding.
Repair at authorized factory.
Damage of gear,
shaft and bearing
Repair at authorized factory.
Defect of key of
shaft sprocket or pulley
Replace the key
One of 3-phase circuit is
opened and works
as single-phase circuit
Check
motor
terminal
voltage,
current,
breakage of fuse or winding, repair defect.
Load is to heavy
Lower load to rotated or raise capacity.
Capacitor connection
forgotten
(Single-phase motor)
Connect capacitor
Malfunction of governor
switch
(Single-phase motor)
Repair at authorized factory.
Motor rotate
in no load
but
trouble
occurs
on load
Abnormal
noise
Inversion of foreign
article
Removal of foreign article
Damage of bearing
wear of shaft
Repair at authorized factory
Damage or wear gear
Repair at authorized factory
Overload
relay acts
Bad setting at improper
selection of overload
Revise setting value, or replace to regular one
