Hoshizaki KM-151BAH User Manual
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Fig. 2
5. BIN CONTROL
This machine uses a lever-actuated proximity switch (mechanical bin control) to control
the ice level in the storage bin. No adjustment is required.
[a] EXPLANATION OF OPERATION
The bin control is connected to the K1 connector (pins 4 & 5) on the control board.
When the bin control is calling for ice (proximity switch closed; "POWER OK" LED on),
the control board continues icemaking operations. When the bin control is activated
in the bin full position (proximity switch open; "POWER OK" LED flashing), the control
board drains and shuts down the unit. However, to prevent incomplete batches of
ice from forming on the evaporator, the control board will only shut down the machine
during the freeze cycle before the five minute timer expires. The five minute timer starts
counting down when the thermistor temperature reaches 36°F (2°C). If, during the
freeze cycle, ice pushes in the lever after the five minute timer expires, the control board
will allow the machine to complete the freeze cycle and the following harvest cycle
before shutting down the machine.
[b] BIN CONTROL CHECK PROCEDURE
1) Clear any ice away from the bin control.
2) Make sure the control switch is in the "ICE" position.
3) Check that the "POWER OK" LED on the control
board is on.
4) Activate the bin control actuator (press the actuator
in). Check that the "POWER OK" LED flashes.
5) Disconnect the bin control at the 2-pin connector
attached to the black wires (located in the circle in
Fig. 2) coming from the K1 connector (pins 4 & 5) on
the control board.
6) Check for continuity across the bin control leads.
When calling for ice, the bin control proximity switch
should be closed. If open, replace the bin control.
Activate the bin control actuator (press the actuator
in), check for continuity across the bin control leads.
The bin control proximity switch should be open. If
closed, replace the bin control.