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 | |
|
– 16 –
