LG WM2277H Series, Training Manual

Page: 28 / 82

WM2277 WASHER PAGE 30 of 84 TRAINING MANUAL
Part No. 6501KW2002A
Hall Sensor Testing
The hall sensor can be tested from the
control board or at the hall sensor.
Ohm Testing the Hall Sensor
If tested off the stator using the
diagram on the previous page, ohm
check the resistors from pin 5 to pin 1
and pin 2. If the hall sensor is good,
you should measure approximately 10
K
Ω from pin 5 to pin 1 and 10 K Ω from
pin 5 to pin 2. If either test shows an
open (infinity) the hall sensor is
defective and must be replaced.
Voltage Testing Hall Sensor at Stator
If measuring voltage from the control board to the hall sensor, follow the
following steps:
1. Unplug the power cord.
2. Remove the rear washer panel.
3. Locate the Hall sensor connector on the stator behind the rotor.
4. Place the meter leads on terminals 5 to 4, white to gray.
5. Plug in the power cord, close the door, and press the power button.
DO NOT PRESS START!
6. You should measure 10 to 15 V
dc
. If 10 to 15 V
dc
is present, the control
board is OK!
If not, follow the testing output voltages on control
board in next section.
7. To measure output signal voltage from the hall sensor, carefully move test
leads to terminals 4 (gray) to 1 (blue). Slowly rotate the motor rotor by
hand. You should read a pulsing 10 V
dc
. If 10V
dc
is measured from 4 to 1,
move the lead on the blue wire to the red wire, terminal 2. Repeat rotating
motor rotor by hand. You should read a pulsing 10 V
dc
.
8. If pulsing 10 V
dc
is measured from pin 4 to pin 1 and pin 4 to pin 2, the hall
sensor is OK! If either test netted only 9 to 10 V
dc
without changing (no
pulsing) the hall sensor is likely defective. Disconnect power by
unplugging the washer. Ohm check the hall sensor as outlined in
Ohm
Testing Hall Sensor (See above) to verify failure of the hall sensor.