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7.0 Common malfunction diagnosis
Before asking for amendment and examination, please check based on the
following points. If the malfunction can not be eliminated, please contact the
amendment center or local sale agency.
Problem:
Possible Cause:
Solution:
Motor operates
intermissively
Power cable looses/falls off
Power cable is broken
Switch is broken
Check all the power cable connection
Replace the power cable
Replace the switch
Motor does not
work
Power cable looses/falls off
Power cable is broken
Switch is broken
Capacitor damaged
Centrifugal switch damaged
Loop short circuit
Check all the power cable connection
Replace the power cable
Replace the switch
Replace the capacitor
Replace the centrifugal switch
Replace the stator resistor
Motor rotation
speed is very
low
Capacitor damaged
Start loop failure
Check capacitor
Check the centrifugal switch
Motor rotation
driving disc
does not work
Connect block in gear box
rupture
Replace the connect block
Machine stops
Electrocircuit over loads
Brush over loads
Size of extension cable does not
match
Abnormal use
Check the load of all electrocircuit
Check, change operation manner
Replace extension cable
Consult dealer
Machine rocks
or vibrate
severely
Brush/pad
driver
warp
or
damage
Brush/pad diver are not in centre
position
Replace brush/pad driver
Make brush/pad driver in centre position
Vibration noise
Motor bearing broke
Wheels loose
Replace motor bearing
Fasten the wheels
