GE PDE9900 manual Detergent Level Sensor

Page 16

Detergent Level Sensor

The SmartDispenseTM detergent level sensor consists of a single level detection continuity sensor and includes the following components:

•a grommet seal

•a low detergent LED indicator light

•a wire harness.

When the detergent in the reservoir drops below the continuity sensor, a signal is sent to the control board and the low detergent LED indicator light is turned on. The light indicates 3 to 7 wash cycles left before the detergent reservoir is completely empty.

Light will

SmartDispense

DRYING

turn on

 

LOW DETERGENT

 

when time

SENSING

SANITIZED

to refill

WASHING

CLEAN

 

 

Note: The Low Detergent LED may look like it is illuminated when in fact it is not. An indicator that is illuminated will be a bright red.

Note: If the SmartDispenseTM system is not being used, the low detergent light can be turned off (or on) by pressing the Added Heat pad 5 times within 3 seconds. There will be 3 audible beeps when the light goes off.

The sensor is similar to the type used in several automotive applications such as the windshield wiper fluid reservoir.

Control 5 VDC to Sensor

The routing of the DC wiring from the tank is very important. The 3 tape points on the tank keep the DC wiring perpendicular to the AC harness wiring running down across the front of the tank. (See tank photo.)

Tape Point

Tape Point

Tank

Tape Point

Sensor and Gasket

The control takes a reading of the detergent level at power up (when power is restored from an outage) and each time the door is closed and latched.

The control outputs a pulsing 5 VDC analog signal to the sensor and monitors the return voltage. Changes in the quantity of detergent in the tank change the amount of current drawn by the sensor.

Note: The dispenser tank, sensor with wire harness, and gasket are only available as a complete assembly (part # WD35X10058). They are shipped with a new dispenser tank retaining collar.

Detergent Level Sensor Strip Circuit

DETERGENT

SENSOR

BRN/YELLOW

RED

J4-3

J4-1

 

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Contents Technical Service Guide Important Safety Notice Table of Contents Nomenclature W 9 9 8 0 L 0 0 S SModel Number Serial NumberIntroduction Control Features PDW8900 SeriesSelections Enhancements Start Component Locator Views PDW8900 Series Shown Inside Cabinet ViewLeft Side View PDW8900 Series Shown Door ViewPDW9000 Series Shown PDW8900 Series Shown Bottom ViewFront of Dishwasher Rear of DishwasherDoor Panel PDW9700 Series and PDW9900 Series Dishwasher ComponentsPDW8900 Series Keypad Assembly PDW9700 Series and PDW9900 Series Water Hardness Test and Calibration Test Water Hardness SmartDispenseTM CalibrationWater Hardness Test Strip Indication Front Mount Control PDW8900Detergent Reservoir SmartDispenseTMTo remove the reservoir Detergent Level Sensor Approximate Detergent Use Positive Displacement PumpTo remove the pump Customer Purge of the Bulk Dispenser Tank When to Purge the Bulk Dispenser TankConsumer Purge Cycle Detergent/Rinse Module Door Interlock Switchfirst time the module is activated Removal and Replacement Using the Dishwasher with the Upper Rack RemovedMiddle Spray Arm Upper Spray Arm Main ConduitFill Funnel Lower Spray Arm, Fine Filter, and Inlet CoverHeating Element Test Turbidity SensorCalibrating the Turbidity Sensor Drain System Smart Fill System Water Valve and Flood Switch Water Valve TestDemo Mode Wash CyclesControl Module Control Module BoardActive Vent Single Rack WashTM Normal Wash CycleCirculation Pump and Motor Wax Motor and MagnetDoor Spring Installation Service Mode Description TimeFactory Test Mode Entering Factory Test ModeSchematics and Strip Circuits Verify operation afterPDW9700 Series PDW9900 SeriesWarranty for 2005 Product For The Period GE Will ReplaceWarranty for 2006 and Later Product For The Period GE Will Replace
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