Bin Control; Gearmotor; Figure 15. Bin Control Switch - Cornelius 500-Series Installation And Service Manual

BIN CONTROL

The type of bin control used on all WCC Models is thermostatically controlled. The switch itself is inside the
electrical box and can be serviced from the front of the unit. The cap tube bulb is located directly under the ice
chute.
To test switch, disconnect power to unit and remove one wire from switch. Connect both leads of your ohmme-
ter to the Bin Control Switch terminals. With control bulb at room temperature ohmmeter should read " Closed
Circuit" . Refer to Figure 15
Now cover the control bulb with ice, within 1 minute switch should " click"and ohmmeter should read " Open Cir-
cuit."
The Bin control is in electrical series with coil on antifreeze relay along with the low water safety. If unit is water
cooled, the condenser high pressure cut out is also in series.
The Control Switch is held in place inside electrical box by 2 screws. Control bulb is positioned under ice chute
and can be replaced by removing screw that holds bracket to base of unit. With control and bracket removed,
slip bulb off end of bracket.
The most important thing to remember when replacing probe is to be careful not to cut or kink probe and be
sure sensor bulb is located in a position to shut unit down before ice reaches ice chute.
This icemaker is equipped with a safety ice level sensor. This sensor control is located on the dispense tray cov-
er. This switch is also in electrical series with the anti-freeze relay and other safety circuitry.

GEARMOTOR

The gearmotor is equipped with a start relay and a manual reset overload.
When current is applied, the relay energizes and completes the circuit to the start winding. The motor reaches a
predetermined speed and the relay drops out, disconnecting the start winding. The run winding remains in the
circuit as long as current is applied.
The purpose of the overload is to automatically shut off the motor in the event of a mechanical bind of the trans-
mission, an overload condition within the evaporator or an electrical malfunction. It does this by sensing amper-
age draw. If the motor stalls the start relay would energize and stay energized. The amperage would surge 5 to
6 times greater than the normal draw. In this event the overload would shut off the transmission in 4 to 8 sec-
onds.
If the motor is subjected to an abnormal load, but does not reach a stall condition, the overload will react, but
over a greater period of time. The reaction time depends upon the amperage to which it is subjected.
The overload, through the safety circuit, also shuts off the compressor.
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BIN CONTROL
SWITCH TERMINALS

FIGURE 15. BIN CONTROL SWITCH

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