Pressure Sensor (Water Level Switch) - GE Profile Harmony WPGT9360 Technical Service Manual

Pressure Sensor (Water Level Switch)

The pressure sensor is connected by a clear hose to
an air reservoir near the bottom of the outer tub and
operates by a frequency (kHz) signal to the inverter
board.
Clear Hose
The pressure sensor wires (purple, orange, and blue)
are connected at pins 1, 3, and 4 at the 4-pin red
connector on the inverter board. (See
Main Board Pin Connectors
The approximate resistance value of the transducer,
measured between the purple and orange wires, is
20 Ω.
WX
PRESSURE
S/W
COLOR CODE
LETTERS COLOR
AX LT. BLUE
BX
BLACK
CX BROWN
NX DK.BLUE
OX
ORANGE
PX
PINK
THE "X' INDICATES ONE SOLID COLOR-
NO TRACER. WIRES WITH TRACER SHOW
BOTH COLORS, EXAMPLE - WR IS WHITE
WITH RED TRACER.
• When the water level rises in the washer tub,
air is trapped in the reservoir. As the water level
rises, the air pressure in the reservoir increases.
• The pressure is translated into an electrical
signal (frequency) by the pressure sensor.
• The frequency will vary from approximately
27 kHz (empty tub) to 22 kHz (full tub).
• This frequency can be measured at the pressure
sensor between the purple and orange wires.
Pressure Sensor
Disconnect
Inverter and
).
VX
OX
RX
NX
WX
WX
LID
LETTERS COLOR
RX RED
SX
GRAY
GX GREEN
VX PURPLE
WX
WHITE
YX
YELLOW
The frequency is monitored by the inverter which
turns off the water valves when the desired water
level is achieved.
Note: The water level will vary depending on the
load size, which is measured by the dry load and
wet load sensing cycles. This information is sent to
the inverter, which then determines the appropriate
water level.
Pressure Sensor Test
If the pressure sensor is not operating correctly,
perform the following test:
1. Set the wash cycle to SNEAKERS. This cycle
bypasses the load sensing feature and defaults
to the minimum water level.
2. Measure the water level from the center hub of
the infusor (it should be approximately 2 inches
deep in the tub).
3. Set the washer to COMFORTER. This cycle
bypasses the load sensing feature and defaults
to the maximum water level.
4. Measure the water level from the center hub of
the infusor (it should be approximately 11 inches
deep in the tub).
Note: Before disconnecting the hose from the
pressure sensor, be sure the water level is below the
bottom of the spin basket.
To remove the pressure sensor:
1. Remove the 2 Phillips-head screws that hold the
in place.
Backsplash
2. Place a towel over the lid of the washer to
prevent scratches to the surface. Gently lift each
corner of the backsplash, then roll it forward so
it rests on top of the washer.
3. Remove the 3 Phillips-head screws that hold the
protective cover in place.
4. Disconnect wiring to the pressure sensor.
5. The pressure sensor is held in place by 3 tabs.
With a fl at-blade screwdriver, press the tabs
back and lift the water level switch up and out.
6. Disconnect the clear hose from the pressure
sensor.
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