TRAINING MANUAL
WM0742HGA
WM0742HGA Page
31
TRAINING
MANUAL
DIRECT DRIVE MOTOR
The motor is a direct-drive, brushless, DC
motor. It is attached to the drum via a
splined shaft, eliminating belts, pulleys,
transmissions, and the inherent problems
associated with them. The rotor is attached
to the shaft by one large bolt.
The DC motor can be driven from stopped
to maximum speed in infinite steps in either
direction. There are 36 poles on the
stator; 12 permanent magnets spaced
around the rotor. There are no brushes to
wear out. Unlike a more traditional
brushless motor, the rotor surrounds the
stator rather than being attached to it.
A Hall Effect Sensor determines the speed
and direction of the motor.
It also can read that the load is off balance
when the drum speed fluctuates.
The Hall Effect sensor is easily removed
and replaced. You’ll have to remove the
rotor and stator to access the sensor.
When replacing the rotor, the drum may
move forward enough to make replacing
the bolt difficult. Carry a longer bolt in
your toolbox to use to install the rotor,
then remove and replace it with the factory
bolt after the shaft has been pulled back
and the rotor is pushed in place.
Before going to this trouble, check the
connector on the main board. It is the
white connector (circled in red.) Pull the
connector off and verify the board is
receiving a signal from the hall sensor.
(See pages 48
~
52 for more information.)
Summary of Contents for WM0742HGA
Page 1: ...LG TRAINING MANUAL LG TRAINING MANUAL Steam Washer WM0742H A Fall 2008 ...
Page 29: ...TRAINING MANUAL WM0742HGA WM0742HGA Page 27 TRAINING MANUAL WIRING DIAGRAM ...
Page 32: ...TRAINING MANUAL WM0742HGA WM0742HGA Page 30 TRAINING MANUAL DISPENSER HOSE CONNECTIONS ...
Page 57: ...TRAINING MANUAL WM0742HGA WM0742HGA Page 55 TRAINING MANUAL ERROR CODES continued ...
Page 70: ...TRAINING MANUAL WM0742HGA WM0742HGA Page 68 TRAINING MANUAL MAIN BOARD ...
Page 71: ...TRAINING MANUAL WM0742HGA WM0742HGA Page 69 TRAINING MANUAL EXPLODED VIEW CABINET ASSEMBLY ...
Page 72: ...TRAINING MANUAL WM0742HGA WM0742HGA Page 70 TRAINING MANUAL DRUM and TUB ASSEMBLY ...
Page 73: ...TRAINING MANUAL WM0742HGA WM0742HGA Page 71 TRAINING MANUAL DISPENSER ASSEMBLY ...
Page 81: ...TRAINING MANUAL WM0742HGA WM0742HGA Page 79 TRAINING MANUAL SERVICE BULLETINS ...
Page 82: ...TRAINING MANUAL WM0742HGA WM0742HGA Page 80 TRAINING MANUAL ...
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Page 94: ...Steam Washer Fall 2008 ...