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91U1TB10A9907
8. OPERATION
8. OPERATION
8. OPERATION
8. OPERATION
8. OPERATION
The steps in the start-up/operation sequence are as
follows:
1) 1 Minute Fill Cycle
The unit always starts in the 1 minute fill cycle. When
power is applied to the unit, the water valve is
energized and the fill period begins. After 1 minute
the board checks for a closed float switch. If the float
switch is closed the harvest cycle begins. If not, the
unit will not start without adequate water in the
sump. This serves as a low water safety shut off.
The water valve will remain energized through ad-
ditional 1 minute cycles until sufficient water enters
the sump and the float switch closes.
2) 1st Harvest Cycle
The compressor starts, hot gas valve opens, water
valve remains open and harvest begins. As the
evaporator warms, the thermistor located on the
suction line checks for a 9°C temperature. When
9°C is reached, the harvest is turned over to the
adjustable control board defrost timer which is
factory set for normal conditions. This adjustment
can vary the defrost timer from 1 to 3 minutes.
3) Freeze Cycle
After the timer terminates the harvest cycle, the hot
gas and water valves close, and the ice production
cycle starts. For the first 5 minutes the controller
board will not accept a signal from the float switch.
This 5 minute minimum freeze acts as a short cycle
protection. At the end of 5 minutes the float switch
assumes control. As ice builds on the evaporator
the water level in the sump lowers. The freeze
continues until the float switch opens and termi-
nates ice production.
4) Normal Harvest Cycle
The water valve opens to allow water to assist the
harvest. As the evaporator warms, the thermistor
reaches 9°C. The control board receives the ther-
mistor signal and starts the defrost timer. The water
valve is open during harvest (defrost) for a maxi-
mum of 6 minutes or the length of harvest, which-
ever is shorter. When the defrost timer completes
its countdown, the defrost cycle is complete and the
next freeze cycle starts.
The unit continues through 3), 4) and 5) sequence
until the bin control senses ice and shuts the unit
down.
Note: If the icemaker does not start or complete a
cycle of operation, contact your nearest
Hoshizaki Distributor for guidance.
9. FINAL CHECK LIST
9. FINAL CHECK LIST
9. FINAL CHECK LIST
9. FINAL CHECK LIST
9. FINAL CHECK LIST
1) Is the icemaker level?
2) Is the icemaker in a site where the ambient
temperature is 7°C to +40°C all year
around?
3) Is there at least a 15 cm. clearance around the
icemaker for maintenance or service?
4) Have all shipping tape(s), packing and cartons
been removed from the icemaker? Are the cube
guides in their correct position?
5) Have all electrical and piping connections been
made?
6) Has the power supply voltage been checked or
tested against the nameplate rating?
7) Are the Water Supply Line Shut-off Valve and Drain
Valve installed? Has the water supply pressure
been checked to ensure a minimum of .7 bar and
a maximum of 8 bar?
Note: The icemaker may stop running when the
water supply is OFF, or if the pressure is
below .7 bar. When the proper water pres-
sure is reached, the icemaker automati-
cally starts running again.
8) Have the compressor hold-down bolts and
refrigerant lines been checked against vibration
and possible failure?
9) Has the Bin Control Switch been checked for
correct operation?
10) Has the end user been given the
instruction manual, and instructed on how to
operate the icemaker and the importance of the
recommended periodic maintenance?
11) Has the end user been given the name
and telephone number of an authorized service
agent?
ENGLISH
