Hoshizaki KML "F" SERIES User Manual download pdf (Page 45)

4. MECHANICAL BIN CONTROL

(THESE INSTRUCTIONS NOT APPLICABLE TO MODELS WITH THERMOSTAT)

[a] PROXIMITY SWITCH

1) This machine uses a lever-actuated proximity switch (hereafter called “mechanical bin

control”) to control the ice level in the storage bin.

[b] EXPLANATION OF OPERATION

1) The startup and shutdown of the ice machine is controlled via the controller board.

Dip Switch number seven must be in the ON position for the controller board to re-

ceive input from the bin control.

(i)

The controller board receives a resistance value input via the red K4 connector

from the bin control. A resistor wire harness is connected from the bin control to

the controller board.

(ii)

When the bin control is activated in the bin full position (pushed to the right), a

15.8 KΩ signal will be sent to the control board to shut down the unit.

(iii) When the bin control is in the normal position (bin is not full), a 7.9 KΩ reading is

sent to the control board to continue operation.

2) During operation, the controller board will only shut down the machine if a 15.8 KΩ

signal is received from the bin control during the first 5 minutes of the freeze cycle.

(i)

If ice pushes the lever to the right after the first five minutes of the freeze cycle,

the controller board will allow the machine to complete the freeze cycle and the

following harvest cycle before shutting down the machine. This will prevent

incomplete batches of ice from forming on the evaporator.

(ii)

If the sensor detects ice within ½ inch of the face and energizes the bin control

relay during the harvest cycle, the controller board will allow the machine to

complete the harvest cycle before shutting down the machine. This will ensure

that all ice has been removed from the evaporator before shutting the machine

down.

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Hoshizaki KML "F" SERIES User Manual Page 45