Test 3 Motor Test - LG DLEX4270 /01 Series Service Manual

FOR LG TECHNICIAN
Test 3
Motor Test
Caution
Trouble Symptom
Measurement Condition
BL2 WH4
Before measuring resistance, be sure to turn the power off and discharge voltage.
(When discharging, contact the metal plug of power cord with ground wire.)
Drum dose not rotate; no blower function, no heater function.
Turn the dryer's power off, then measure resistance.
Is resistance below 3
BL2- (White wire) and WH4-
Measure while door is closed.
Is resistance below 3
BL2- (White wire) and WH4-
Measure while door is closed.
Is resistance below 3
WH4- (Yellow wire) and WH4-
Is resistance below 1
of outlet thermostat attached to blower housing?
Does idle switch attached to motor bracket
operate level by drum belt?
(Not operating lever is normal.)
Is resistance below 1
terminals?
• Check motor. (Refer to 'motor diagram & check')
• Check if control connector is contacted.
between connector
(Brown wire)?
NO
between connector
(Yellow wire)?
YES
between connector
(Brown wire)?
NO
between terminals
YES
between idler switch
YES
40
40
• Replace control.
YES
(Relay check)
• Check controller
connector.
• Check if door frame
presses door switch
knob.
NO
• Check door switch.
• Check harness
connection.
• Replace control.
YES (Relay check)
• Check controller
connector.
• Replace outlet
• Thermostat.
NO
(Refer to
'component')
• Check idler assembly.
• Drum belt cuts off
• Drum belt takes off
YES
from motor pulley.
• Replace idler
NO
switch.