6
GB
Out of service at switch-on
Shortcircuit in motor winding
Replace stator/rotor by repairer
Disc
between plug and
power socket
Put plug in power socket
Novoltage in supply socket
Check and repair power supply
Loose switching contact
Replace switchboard by repairer
Wearout of carbon brush
Replace carbon brush by repairer
Disc
between carbon
brush and commutator
Check conn
on between carbon
brush and commutator by repairer
Excessive sparkling
Underpressure in carbon brush
spring
Replace carbon brush by reparier
Excessive wearout of carbon brush Replace carbon brush by reparier
Overvoltage in supply power
Regulate supply voltage
Disc
between carbon
brush and commutator
Replace carbon brush by repairer
Ring
fi
re caused by shortcircuit in
rotor winding shortcircuit
Check or replace rotor by repairer
Ring
fi
re caused by shortcircuit in
commutator segment
Check or replace rotor by repairer
Running speed drop
Low supply voltage
Regulate supply voltage
Damage in machinery parts
Replace machinery parts by repairer
St
ow speed
Regulate to high speed running
Shortcircuit in rotor
Check or replace rotor by repairer
Machine superhea
Electromotor overload
Normally operate with reference to
specifi
ca
Unsmooth air outlet
Clear up air intake/outlet
No mo on at base plate during
motor running
Bearing damage
Replace bearing by repairer
Eccentric wheel damage
Replace eccentric wheel by repairer
Blockup at wheel blade due to
rubbing against base plate
Repair or replace by repairer
Excessive machinery vibra
Swing sha racture
Replace swing sha by repairer
server wear or damage in eccentric
wheel
Replace eccentric wheel by repairer
Substandard sanding e
ff
ect
Severe wear in abrasive paper or
incorrect s
on of abrasive
paper
Replace abrasive paper
TROUBLE SHOOTING
Fault Symptom
Possible Cause
Tr
