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D. Bin Control
The mechanical bin control is a lever-actuated
proximity switch used to control the level of ice in
the dispenser unit/storage bin. There are 2 sets
of mounting holes on the rear interior wall. For
dispenser unit applications, the lower set of holes
is recommended. When installed on a standard
Hoshizaki storage bin, either set of holes is
acceptable. See Fig. 1. The bin control should be
mounted flush with the dispenser unit/storage bin
wall.
The bin control is connected to the K1 nine-pin connector (pins 4 & 5) on the control
board. When the actuator paddle is not engaged (bin control switch closed; "POWER
OK" LED on), the unit produces ice. When the actuator paddle is engaged (bin control
switch open; "POWER OK" LED flashing), the control board drains the water tank and
then shuts down the unit. Note that there is a delay before the shutdown sequence
begins. The delay varies depending on the cycle the icemaker is in at the time of
activation. For details, see the table below.
Cycle at Bin Control Activation Delay Before Shutdown Sequence Begins
Fill Cycle
Harvest Cycle
Freeze Cycle
For a bin control check procedure, see "IV.C.1. Bin Control Check."
E. Float Switch
The float switch is used to determine that there is sufficient water in the tank after the
1-minute fill cycle and after each harvest cycle. The float switch is also used to determine
that the appropriate volume of water has been converted into ice before switching out
of the freeze cycle. Finally, the float switch is used to determine that the water tank
is empty during the drain that occurs as part of a bin-control activated shutdown. No
adjustment is required.
For a float switch check procedure, see "IV.D.1. Float Switch Check."
F. Thermistor
The thermistor is used as a harvest control sensor, freeze cycle 5-minute short cycle
protection timer sensor, and anti-slush sensor. The thermistor's resistance varies
depending on the suction line temperature. The control board monitors the resistance
to start the harvest timer, start the freeze cycle 5-minute short cycle protection timer,
and momentarily stop the pump motor during the freeze cycle if the anti-slush control is
activated. No adjustment is required.
For a thermistor check procedure, see "IV.E. Thermistor Check."
15 seconds
15 seconds after the next freeze cycle starts
15 seconds if BC is activated between the beginning of freeze and
termination of the 5-minute short cycle protection timer (timer starts
when the thermistor temperature drops to 36°F (2°C) (5.5 kΩ or
more)). After this time, the unit will not shut down until the next harvest
cycle is complete.
24
Standard Storage
Bin Applications
Use Upper or
Lower Set of
Holes
Dispenser Unit
Applications
Lower Set of Holes
Recommended
Thumbscrews
Fig. 1
Rear
Interior
Wall
Bin Control
Some Parts
Removed for Clarity
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