Pressure Sensor; Pressure Sensor Strip Circuit; Pressure Sensor Chart - GE GFWS2500 Technical Service Manual

Pressure Sensor

Mounting Clip
Tan
Hose Connection
Operating Voltage: 5 VDC
Output Frequency: 44.67 Hz (Empty) - 37.04 Hz
(Overfl ow)
Location: See Pressure Sensor Location on page 35.
The pressure sensor is an electronic oscillator that
changes its output frequency according to the air
pressure present on its diaphragm. Air pressure
is delivered to the pressure sensor through the
pressure sensor hose which also connects to the air
dome. The air dome is designed to build air pressure
as water fi lls the tub.

Pressure Sensor Strip Circuit

IMC J501-12
5 VDC
IMC J501-10
Output
IMC J501-2
GND
Grey
Pressure Sensor

Pressure Sensor Chart

Water Level
Name
Empty
Steam Reset
Steam Set
Foam Reset
Foam Set
Main Reset
Main Set
Door Drain Reset 4.72"
Door Drain Set
Overfl ow Set
Pressure sensor frequency can be read between
pins 1 and 2 of the pressure sensor. The pressure
sensor requires a 5 VDC between pin 2 (brown) and
pin 3 (tan) to operate. The output is taken between
pin 1 (brown) and pin 2 (grey).
Pressure Sensor Strip Circuit
IMC J501-12
5 VDC
IMC J501-10
Output
IMC J501-2
GND
Pressure Sensor Tests
• Enter service mode.
• Run Test 16 and verify displayed frequency with
table with water levels in the table above.
Pressure Sensor Removal
1. Disconnect power to the unit.
2. Remove the control panel. (See Control Panel
Removal)
3. Remove the IMC board. (See IMC Board Remov-
al)
4. Disconnect the pressure sensor harness and
unclip the pressure sensor from the IMC board.
60
Amount of Frequency
water in
basket
N/A 44.67 Hz
-0.4" 43.68 Hz
0" 43.45 Hz
.68 " 43.02 Hz
1.47" 42.54 Hz
1.86" 42.30 Hz
2.85" 41.71 Hz
40.57 Hz
5.47" 40.11 Hz
10.56" 37.04 Hz
Pressure Sensor