17
TROUBLE SHOOTING GUIDE
CONDITION CHECKPOINT METHOD OF INSPECTION CAUSE / REMEDY
Motor fails to rotate. Power cord Check power cord continuity between If there is no continuity,
(no noise is heard connection. plug pins and base contact. replace the power cord.
at all).
Motor continuity. Check motor continuity. If there is no continuity, replace it.
Carbon brushes. Check if there is gap between If there is gap between carbon brush
carbon brush and conmutator. and conmutator, replace both
carbon brushes.
Check the contact between carbon brush If the contact is not correct,
and conmutator. replace the motor.
ON/OFF Switch. Check continuity across switch terminals. If there is no continuity, replace it.
Thermal cut-out. Check continuity across If there is no continuity, replace it.
thermal cut-out terminals.
Triac. Check if the triac is in open circuit. If it is in open circuit, replace
the power control circuit.
Power control circuit. Check if the diac is in open circuit. If it is in open circuit, replace
the power control circuit.
Sliding potentiometer. Check if the potentiometer is in open circuit If it is in open circuit, replace it.
or if the lead wires connection is not correct. If the lead wires connection
is not correct, repair them.
Motor runs but Hose or Suction inlet. Check if there is any blockage If there is any blockage, remove it.
does not suction. in the hose or suction inlet.
Dust bag / Central filter. Check if dust bag is full or dust If the paper bag is full, replace it.
accumulated in central filter . If the central filter is dirt,
clean or replace it.
Noise or vibration. Motor fan. Check dust accumulated in motor fan If there is dust accumulated in motor
(it could happen if the vacuum cleaner fan, replace the motor and check
has been used with a broken bag filter condition.(never try to dismantle
or without central filter). the motor fan).
Motor does not Sliding potentiometer. Check if the potentiometer is short-circuited. If it is short-circuited, replace it.
change power.
(Runs always at full Power control circuit. Check if the power control circuit If it is short-circuited, replace it.
speed). is short-circuited.
Motor runs irregularly. Sliding potentiometer. Check if there is bad contact in the sliding If there is bad contact, replace
potentiometer terminals. the sliding potentiometer.
Floor nozzle dust Dust indicator Check the suction inlet, tube and hose If there is any blockage remove it.
sensor. does not operate for any blockage.
(MC-E885 only). correctly.
Check dust buid-up on the sensor. If the sensor is very dusty, clean it
using a soft dry duster.
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