Hall Sensor; Hall Sensor Strip Circuit; Hall Sensor Tests; Hall Sensor Diagnostics - GE GFWS2500 Technical Service Manual

Hall Sensor

Operating Voltage: 16 VDC
Resistance: N/A
Location: See Hall Sensor Location on page 36.
The hall sensor assembly is used to measure rotor
RPM. Three hall sensors are used to provide better
resolution. The hall sensor assembly snaps onto the
stator and is oriented so that the hall sensors are in
very close proximity to the rotor magnets.
A hall sensor is a transducer that varies its output
voltage in response to a magnetic fi eld. Voltage
output is changed in the hall sensor each time a
rotor magnet passes by. This changing voltage is
detected by the IMC board and is used to determine
rotor speed.

Hall Sensor Strip Circuit

1
4
Hall Sensor 6
5
2
L1
IMC J101-3
N
IMC J101-2

Hall Sensor Tests

1. Remove the door striker and insert it into the
door lock assembly.
2. Enter service mode and select Test 11.
Harness Connector
IMC J1001 - 5
IMC J1001 - 4
IMC J1001 - 3
IMC J1001 - 2
IMC J1001 - 1
3. Press the Start key.
4. Press and hold the door switch and wait for
"000" to appear in the display.
5. Rotate the wash basket by hand in either direc-
tion. As the basket spins, the RPM value will be
displayed in the display.

Hall Sensor Diagnostics

1. Verify hall senor mounting. The hall sensor may
have become unclipped.
2. Check wiring between hall sensor assembly and
IMC board.
3. If hall sensor mounting and wiring are good,
replace the hall sensor.

Hall Sensor Removal

1. Disconnect power to the unit.
2. Remove the rear panel. (See Rear Panel Remov-
al)
3. Remove the rotor. (See Rotor Removal)
4. Remove the stator. (See Stator Removal)
5. Disconnect the hall sensor harness and unclip
the front hall sensor clips fi rst then unclip the
rear clip.
58