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9-3. STATOR ASSEMBLY

         

  

 

 
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The DD 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.

Test Points

Result

(1) to (2)
(2) to (3)
(3) to (1)

5-15 9
5-15 9
5-15 9

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+$,

Test point

and

Result

(Hall

Sensor)

The hall sensor determines the speed and direction of the motor.

It also can read that the load is off balance when the drum speed fluctuates.

- Voltage Testing Hall Sensor at Stator

If measuring voltage from the Main PCB Assembly to the Hall Sensor,use the

following steps:

1. Unplug power cord.

2. Remove rear washer panel.

3. Locate Hall sensor connector on the stator behind the rotor.

4. Place meter leads on terminals 5 to 4,white to gray.

5. Plug in power cord,close door,and press power button.

DO NOT PRESS START!

6. You should measure 10 to 15 Vdc. If 10 to 15 Vdc is present,control board,

white wire,and gray wire are OK! If not follow testing output voltages on control

board in next section.

(1) (3) (5)

(2) (4)

1. Unplug power cord.
2. Remove rear panel.
3. Remove Washer Top.
4. Remove Main PCB Assembly cover as shown in Figure below.
5. Locate the white Hall Sensor 4 wire connector using wiring diagram wire colors

as your guide.

6. Plug in power cord, close door, and press power button. DO NOT PRESS

START!

7. Place meter leads on White & Gray wires. You should read 10 to 15 Vdc output

from the Main PCB Assembly to the Hall sensor. If no 10 to 15 Vdc is
measured the control board is defective.

8. Place meters leads on Blue to Gray. Turn motor rotor slowly by hand. You

should measure a pulsing 10 Vdc. Place meter leads on Red to Gray. Turn
motor rotor slowly by hand. You should measure a pulsing 10 Vdc. If both tests
measure a pulsing 10 Vdc, hall sensor and harness OK. If either or both tests
measures 9 to 10 volts, but does not pulse or change, Hall sensor has failed
and must be replaced. IF zero (0) voltage is measured on either test, check red
& blue wires for continuity. Repair or replace harness as needed.

7. To measure output signal voltage from the hall sensor, carefully move test

leads to terminals 1 to 4, blue and gray. Slowly rotate motor rotor by hand. 
You should read a pulsing 10 Vdc. If 10 Vdc is measured from 1 to 4, move
lead on blue wire to red wire, terminal 2. Repeat rotating motor rotor by hand.
You should read a pulsing 10 Vdc from red to gray.

8. If pulsing 10 Vdc is measured from 1 to 4 and 2 to 4, hall sensor is OK! If either

test netted only 9 to 10 Vdc without changing (no pulsing) the hall sensor is
likely defective. Disconnect power by unplugging washer and ohm check hall
sensor to verify failure of the hall sensor.

Test Points

(1) to (2)

(1) to (3)

(1) to (4)

(2) to (4)

(3) to (4)

Result

8-12 kΩ
8-12 kΩ

10-15 Vdc

10 Vdc

10 Vdc

Remarks

Voltage Input

Pulsing Signal

Pulsing Signal