Bin Control; Explanation Of Operation; Bin Control Check Procedure - Hoshizaki KMD-850MAH Service Manual

F. 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.

1. Explanation of Operation

The bin control is connected to the red K4 connector on the control board. When the
bin control is calling for ice (proximity switch closed; green "BC CLOSED" LED on), the
control board continues icemaking operations. When the bin control is activated in the
bin full position (proximity switch open; yellow "BC OPEN" LED on), the control board
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 within the first 5 minutes
of the freeze cycle. If ice pushes the lever in after the first 5 minutes of the freeze cycle,
the control board will allow the machine to complete the freeze cycle and the following
harvest cycle before shutting down the machine.

2. Bin Control Check Procedure

1) Clear any ice away from the bin control.
2) Move the control switch to the "ICE" position.
3) Check that the green "BC CLOSED" LED on the control board is on.
4) Activate the bin control actuator (press the actuator in). Check that the yellow "BC
OPEN" LED on the control board is on.
5) Disconnect the red K4 bin control connector from 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.
7) Reconnect the red K4 connector. Allow the machine to cycle into the freeze cycle.
In the first 5 minutes of the freeze cycle, activate the bin control actuator (press the
actuator in). The yellow "BC OPEN" LED should come on and the machine should turn
off. If not, replace the control board.
Fig. 2

Bin Control

Switch Closed
(calling for ice)
Bin Control
Switch Open
(bin full)
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