[B] Features - Hoshizaki F043-809 KMD-410MAH Service Manual

[b] FEATURES

a) Maximum Water Supply Period - 6 minutes
The harvest water valve will be open during harvest for 6 minutes or the length of harvest
minus 0, 10, 30, or 50 seconds (adjustable by S dip switch 7 & 8), whichever is shorter.
b) Harvest Backup Timer and Freeze Timer
The harvest backup timer shuts down the icemaker if, for two cycles in a row, the harvest
cycle takes more than 20 minutes to complete. The control board will signal this problem
using 2 beeps every 3 seconds.
The freeze timer shuts down the icemaker if, for two cycles in a row, the freeze cycle takes
longer than the time specified to complete. The control board will signal this problem using 3
beeps every 3 seconds. The time is factory set using S1 dip switch 9 & 10.
The alarm reset button on the control board must be pressed with power on to reset either of
these safeties.
c) High Temperature Safety
The temperature of the suction line in the refrigeration circuit is limited by the high
temperature safety. This protects the unit from excessively high temperatures. If the
evaporator temperature rises above 53°C ± 4°C, the thermistor operates the safety.
This shuts down the circuit and the icemaker automatically stops.
The control board will signal this problem using 1 beep every 3 seconds. The alarm reset
button on the control board must be pressed with power on to reset the safety.
d) Low Water Safety
The control board checks the position of the lower float switch at the end of the initial one
minute water fill cycle and at the end of each harvest cycle.
If the lower float switch is in the up position (electrical circuit closed), the control board
changes to the next cycle. If the lower float switch is in the down position (electrical circuit
open), the control board changes to additional one minute water fill cycles until water enters
the sump and the float switch closes. When the float switch closes, the control board
changes to the next cycle. The unit will not start without adequate water in the sump. This
serves as a low water safety to protect the water pump.
For water-cooled model, if the condenser water supply is shut off, the unit is protected by the
high-pressure switch.
e) High Voltage and Low Voltage Cut-outs
The maximum and minimum allowable supply voltages of this icemaker are limited by the
high voltage and low voltage cut-outs.
If miswiring (especially on single 3 phase wire models) causes excessive voltage (147 Vac ±
5% or more) on the control board, the high voltage cut-out shuts down the circuit in 3
seconds and the icemaker automatically stops. The control board will signal this problem
using 7 beeps every 3 seconds.
The icemaker also automatically stops in cases of insufficient voltage (92Vac ± 5% or less).
The control board will signal this problem using 6 beeps every 3 seconds.
When the proper supply voltage is resumed, the icemaker automatically starts running
again.
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