GE Profile PDW8200 Series Technical Service Manual

Also see for Profile PDW8200 Series: Owner's manual Installation instructions Owner's manual Installation instructions Owner's manual

– 24 –1234GYNXSXOXNTCTURBIDITY SENSORRefer to Wiring Diagram for voltages and pin-outs.Turbidity SensorThe turbidity sensor measures the amount ofsuspended particles in the wash water in thesump. As the sump water lays between the 1/4- to3/8-in. gap between the LED transmitter and thereceptor during the first fill, the base-line reading istaken. Successive turbidity measurements aresupplied to the control module and used to deter-mine whether any pre-wash or rinse cycles can beskipped. Decisions are based on a comparison ofclean water measurements at the beginning of thefirst fill, measurements taken at selected fills, andwater temperature. By measuring the turbiditylevel, the control module can conserve energy onlightly soiled loads by skipping unnecessarycycles.Note: If the turbidity sensor circuit fails open orshorted, the sensing LED on the control panel willnot light and the unit will operate for the maximumamount of time, using the maximum number ofwash and rinse fills for the selected cycle.The turbidity sensor also contains the thermistorfor automatic temperature control.Turbidity Sensor TestThe Factory test mode is the most accurate wayto test the turbidity sensor circuit. The turbiditysensor circuit contains the control module, wiring,and turbidity sensor (see Factory Test Mode).To Replace the Turbity Sensor:To remove the turbidity sensor from the side of thesump, loosen the screw and slide the retainingclamp back. Remove turbidity sensor from thesump and unplug connector from the turbiditysensor.Note: When installing the turbidity sensor, alignthe key on the sensor with the keyway on thesump.Heating Element NutsTurbidity SensorBottom ViewKeyway and KeyRetaining Clamp and Screw