Only qualied service technicians should install and service the appliance. To
obtain the name and phone number of your local Hoshizaki Certied Service
Representative, visit www.hoshizaki.com. No service should be undertaken until
the technician has thoroughly read this Service Manual. Failure to service and
maintain the appliance in accordance with this manual will adversely affect safety,
performance, component life, and warranty coverage and may result in costly water
damage. Proper installation is the responsibility of the installer. Product failure or
property damage due to improper installation is not covered under warranty.
Hoshizaki provides this manual primarily to assist qualied service technicians in the
maintenance and service of the product.
Should the reader have any questions or concerns which have not been satisfactorily
addressed, please call, send an e-mail message, or write to the Hoshizaki Technical
Support Department for assistance.
618 Highway 74 South
Peachtree City, GA 30269
Attn: Hoshizaki Technical Support Department
Web Site: www.hoshizaki.com
NOTE: To expedite assistance, all correspondence/communication MUST include the
following information:
• Model Number
• Serial Number
• Complete and detailed explanation of the problem.
1
IMPORTANT
This manual should be read carefully before the appliance is serviced. Read the
warnings and guidelines contained in this manual carefully as they provide essential
information for the continued safe use, service, and maintenance of the appliance.
Retain this manual for any further reference that may be necessary.
Important Safety Information ..........................................................................................4
I. Construction and Water/Refrigeration Circuit Diagram ...............................................6
A. Construction ...........................................................................................................6
C. Wiring Diagram ....................................................................................................56
3
Important Safety Information
Throughout this manual, notices appear to bring your attention to situations which could
result in death, serious injury, damage to the appliance, or damage to property.
WARNINGIndicates a hazardous situation which could result in death or
serious injury.
NOTICE Indicates a situation which could result in damage to the
appliance or property.
IMPORTANT Indicates important information about the installation, use,
and care of the appliance.
WARNING
The appliance should be destined only to the use for which it has been expressly
conceived. Any other use should be considered improper and therefore dangerous.
The manufacturer cannot be held responsible for injury or damage resulting from
improper, incorrect, and unreasonable use. Failure to service and maintain the
appliance in accordance with this manual will adversely affect safety, performance,
component life, and warranty coverage and may result in costly water damage.
To reduce the risk of death, electric shock, serious injury, or re, follow basic
precautions including the following:
• Only qualied service technicians should install and service the appliance.
• The appliance must be installed in accordance with applicable national, state, and
local codes and regulations.
• The appliance requires an independent power supply of proper capacity. See
the nameplate for electrical specications. Failure to use an independent power
supply of proper capacity can result in a tripped breaker, blown fuse, damage to
existing wiring, or component failure. This could lead to heat generation or re.
• THE APPLIANCE MUST BE GROUNDED: The appliance is equipped with a
NEMA 5-15 three-prong grounding plug to reduce the risk of potential shock
hazards. It must be plugged into a properly grounded, independent 3-prong wall
outlet. If the outlet is a 2-prong outlet, it is your personal responsibility to have a
qualied electrician replace it with a properly grounded, independent 3-prong wall
outlet. Do not remove the ground prong from the plug and do not use an adapter
plug. Failure to properly ground the appliance could result in death or serious
injury.
• Do not use an extension cord.
• To reduce the risk of electric shock, do not touch the control switch, service switch,
or plug with damp hands. Make sure the control switch is in the "OFF" position
before plugging in or unplugging the appliance.
• Do not use an appliance with a damaged power cord. The power cord should not
be altered, jerked, bundled, weighed down, pinched, or tangled. Such actions
could result in electric shock or re. To unplug the appliance, be sure to pull the
plug, not the cord, and do not jerk the cord.
• Do not make any alterations to the appliance. Alterations could result in electric
shock, injury, re, or damage to the appliance.
4
WARNING, continued
• The appliance is not intended for use by persons (including children) with reduced
physical, sensory, or mental capabilities, or lack of experience and knowledge,
unless they have been given supervision or instruction concerning use of the
appliance by a person responsible for their safety.
• Young children should be properly supervised around the appliance.
• Do not climb, stand, or hang on the appliance or appliance door or allow children
or animals to do so. Serious injury could occur or the appliance could be
damaged.
• Be careful not to pinch ngers when opening and closing the door. Be careful
when opening and closing the door when children are in the area.
• Do not use combustible spray or place volatile or ammable substances near the
appliance. They might catch re.
• Keep the area around the appliance clean. Dirt, dust, or insects in the appliance
could cause harm to individuals or damage to the appliance.
NOTICE
• Protect the oor when moving the appliance to prevent damage to the oor.
• Follow the water supply, drain connection, and maintenance instructions carefully
to reduce the risk of costly water damage.
• In areas where water damage is a concern, install in a contained area with a oor
drain.
• Install the appliance in a location that stays above freezing. Normal operating
ambient temperature must be within 45°F to 100°F (7°C to 38°C).
• If water collects in the bin and will not drain, turn off the appliance and close the
water supply line shut-off valve. Locate and resolve the issue.
• Do not leave the appliance on during extended periods of non-use, extended
absences, or in sub-freezing temperatures. To properly prepare the appliance for
these occasions, follow the instructions in "VI. Preparing the Appliance for Periods
of Non-Use."
• Keep ventilation openings, in the appliance enclosure or in the built-in structure,
clear of obstruction.
• Do not place more than 33 lb. (15 kg) on the top panel.
• The storage bin is for ice use only. Do not store anything else in the storage bin.
5
I. Construction and Water/Refrigeration Circuit Diagram
A. Construction
1. KM-230BAJ, KM-300BAJ
Top Panel
Side Panel (L)
Front Cover
Rear Panel
Door
Air Filter
Louver
Leg
Side Panel (R) Power Supply Cord
Top Cover Hot Gas Valve Thermistor
Drain Valve
Evaporator Condenser
Fan Motor Cleaning Valve
Separator Compressor
Water Tank Water Valve
Expansion Float Switch
Valve
Overow Pipe Drier
Pump Motor
Control Switch
Service Switch
Control Box
Front View Rear View
Bin Control Switch
With Tank Removed
6
2. KM-300BWJ
Top Panel
Side Panel (L) Front Cover
Rear Panel
Door
Side Panel (R)
Louver Power Supply Cord
Leg
Top Cover Drain Valve Hot Gas Valve Thermistor
Cleaning Valve
Water Regulating
Evaporator Valve Condenser
Separator
Water Tank
Compressor
Expansion
Valve Water Valve
Overow Pipe
Drier
Control Switch Float Switch
Service Switch
Control Box
Front View Rear View
Bin Control Switch
With Tank Removed
7
3. Icemaking Compartment
Spray Tube
Evaporator
Water Supply Pipe
Separator
Cube Guide
Water Tank
Overow Pipe
Drain Valve
Cleaning Valve Separator
Water Valve
Pump Motor
Float Switch
8
High Pressure
B. Water/Refrigeration Circuit Diagram
1. KM-230BAJ
Hot Gas
Strainer
Switch
Suction
Line
Valve
Discharge Line
Condenser
Water
Supply
Water Valve
Fan
Drier
Insulation Tube
Cleaning
Valve
Drain
Valve
Compressor
Thermistor
Drain
Float
Switch
Pump
Motor
Water Tank
ccess Valve
Refrigerant Circuit
Expansion Valve
Water Circuit
Spray Tube
Evaporator
9
Cube Guide
2. KM-300BAJ
High Pressure
Switch
Suction
Line
Hot Gas
Strainer
Valve
Discharge Line
Condenser
Water
Supply
Water Valve
Fan
Drier
Insulation Tube
Cleaning
Valve
Drain
Valve
Compressor
Thermistor
Drain
Float
Switch
Pump
Motor
Water Tank
Access Valve
Refrigerant Circuit
Expansion Valve
Water Circuit
Spray Tube
Evaporator
Cube Guide
10
3. KM-300BWJ
High Pressure
Switch
Drain
Suction
Line
Hot Gas
Strainer
Valve
Discharge Line
Water Regulating
Valve
Water Condenser
Water
Supply
Water
Supply
Water Valve
Drier
Compressor
Access Valve
Expansion Valve
Insulation Tube
Drain
Cleaning
Valve
Valve
Thermistor
Drain
Float
Switch
Refrigerant Circuit
Water Circuit
Pump
Water Tank
Motor
Spray Tube
Evaporator
Cube Guide
11
II. Sequence of Operation and Service Diagnosis
A. Sequence of Operation
1. Flow Chart
12
extended periods of time over the outside surface of the evaporator.
DRAINPower is supplied to the pump and drain valve. This drains the water tank.
Components Energized when the Control Switch is in the “SERVICE” Position
When in the “SERVICE” position, the control switch supplies power to the service switch and the machine
is in service mode. The service switch has three positions: “DRAIN”, “CIRCULATE”, and “WASH”. See the
CIRCULATEPower is supplied to the pump only. This operation can be used to circulate cleaner for
information below for details of each function.
and sanitizer over both the insde and outside surfaces of the evaporator.
WASHPower is supplied to the pump and cleaning valve. This operation is used to circulate cleaner
10 or 30sec10 or 30sec10 or 30sec30 or 50sec10 or 30sec
5 sec
ON
ON
ON
ON
ON
FAN MOTOR
OFF
*KM-230BAJ, 300BAJ
OFF
KM-230BAJ] 30sec
PUMP MOTOR
[
OFF
COMPRESSOR
ON
ON
ON
ON
OFF
OFF
OFF
OFF
DRAIN VALVE
WATER VALVE
HOT GAS VALVE
[KM-300BAJ/BWJ] 10sec
CLEANING VALVE
ON
OFF
OFF
SWITCH
BIN CONTROL
FLOAT SWITCH
ON
OFF
OFF
(COMP)
(HV/FM)
RELAY: X2
RELAY: X1
ON
ON
OFF
(PM)
RELAY: X3
OFF
OFF
(DV)
(WV)
RELAY: X6
RELAY: X4
CONTROLLER BOARD
13
3. Details
The steps in the sequence are as outlined below. When power is supplied, a 5 second
delay occurs at startup. Note that the order of the LEDs from the outer edge of the board
is 5, 6, 8, 4, 7.
a) One Minute Fill Cycle
LED 8 is on. WV opens and the ll period begins. After 1 minute, the board checks for
a closed F/S. If F/S is closed, the harvest cycle begins. If not, WV will remain energized
through additional 1 minute cycles until water enters the sump and F/S closes. This
serves as a low water safety to protect the pump motor.
b) Initial Harvest Cycle
LEDs 5, 6, and 8 are on. WV remains open, Comp energizes, HGV opens, and harvest
begins. As the evaporator warms, the thermistor located on the suction line checks for a
48°F (9°C) temperature. When 48°F (9°C) is reached, a 3.9 kΩ signal turns the harvest
over to the adjustable harvest timer which is factory set for normal conditions. The timer
has settings of 60, 90, 120, and 180 seconds (S1 dip switch 1 & 2). When the harvest
timer completes its count down, the harvest cycle is complete and the freeze cycle
starts. The minimum total time allowed by the board for a complete harvest cycle is 2
minutes. WV is open during harvest for a maximum of 6 minutes or the length of harvest
minus 0, 10, 30, or 50 seconds (adjustable by S1 dip switch 7 & 8), whichever is shorter.
LED 8 goes off when WV closes. PM energizes and runs for the last 0, 10, 30, or 50
seconds of harvest depending on S1 dip switch 7 & 8 setting. LED 7 comes on when
PM energizes. At the end of harvest, the control board checks the position of F/S and
proceeds to the freeze cycle if it is closed or calls for a 1-minute ll if it is open.
c) Freeze Cycle
LEDs 5 & 7 are on. Comp continues to run, PM and FMS energize, HGV closes and the
freeze cycle starts. For the rst 5 minutes after the thermistor temperature reaches 36°F
(2°C), the control board will not accept a signal from F/S. This minimum freeze period
acts as a short cycle protection. At the end of this period, F/S assumes control. As the
evaporator cools, the thermistor located on the suction line checks the temperature and
PM stops (see “II. A. 2. Timing Chart” for details). This is to prevent slushing. As ice
builds on the evaporator the water level in the sump lowers. The freeze continues until
F/S opens and terminates ice production.
d) Pump-Out Cycle
LEDs 4, 5, 6, and 7 are on. Comp continues to run, HGV opens, FMS de-energizes. PM
stops for 2 seconds, DV energizes, then PM restarts to take water from the sump and
force it through DV and down the drain. When the drain timer stops counting, the drain
is complete. The drain timer has settings of 10 and 20 seconds (S1 dip switch 3 & 4).
Pump-out cycle always occurs on the 2nd harvest after startup. Then, depending on
14
the control board setting, pump-out cycle occurs every cycle, or every 2nd, 5th, or 10th
cycle (S1 dip switch 5 & 6).
e) Normal Harvest Cycle
LEDs 5, 6, and 8 are on. Comp continues to run, HGV remains open and WV opens.
As the evaporator warms, the thermistor reaches 48°F (9°C). The control board then
receives the thermistor's 3.9 kΩ signal and starts the harvest timer. WV is open during
harvest for a maximum of 6 minutes or the length of harvest minus 0, 10, 30, or 50
seconds (adjustable by S1 dip switch 7 & 8), whichever is shorter. LED 8 goes off when
WV closes. PM energizes and runs for the last 0, 10, 30, or 50 seconds of harvest
depending on S1 dip switch 7 & 8 setting. LED 7 comes on when PM energizes. At the
end of harvest, the control board checks the position of F/S and proceeds to the freeze
cycle if it is closed or calls for a 1-minute ll if it is open.
The unit continues to cycle through c, d, and e sequence until the bin control is activated
and shuts the unit down. When the bin control is activated, the “POWER OK” LED
ashes.
f) Shutdown
When BC is activated (BC open), the “POWER OK” LED flashes. 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 Cycle15 seconds
Harvest Cycle15 seconds after the next freeze cycle starts
Freeze Cycle15 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.
After the delay, all components de-energize. DV energizes after 2 seconds. PM
energizes after 2 seconds. PM takes water from the tank and forces it through DV and
down the drain. The water tank drains for a maximum of 5 minutes or until F/S opens.
DV and PM then de-energize. When BC closes again calling for ice, the unit starts at
the 1-minute ll cycle. There is a 90-second minimum off time before the icemaker can
restart.
Legend: BC–bin control; Comp–compressor; DV–drain valve; FMS–self-contained fan
motor; F/S–oat switch; HGV–hot gas valve; PM–pump motor; WV–inlet water
valve
15
B. Service Diagnosis
WARNING
• The appliance should be diagnosed and repaired only by qualied service
personnel to reduce the risk of death, electric shock, serious injury, or re.
• Risk of electric shock. Control switch in "OFF" position does not de-energize all
loads. Use extereme caution and exercise safe electrical practices.
• Moving parts (e.g., fan blade) can crush and cut. Keep hands clear.
• Before servicing the appliance, move the control switch to the “OFF“ position and
unplug the appliance.
• CHOKING HAZARD: Ensure all components, fasteners, and thumbscrews are
securely in place after the appliance is serviced. Make sure that none have fallen
into the ice storage bin.
• Make sure all food zones in the appliance and ice storage bin are clean after
service.
The diagnostic procedure is basically a sequence check which can be used at unit startup or for system diagnosis. Using this check out procedure will allow you to diagnose
electrical system and component failures in approximately 10 minutes under normal
operating conditions of 70°F (21°C) or warmer air and 50°F (10°C) or warmer water
temperatures. Before conducting a 10 minute checkout, check for correct installation,
proper voltage per unit nameplate and adequate water supply. As you go through the
procedure, check to assure the components energize and de-energize correctly. If not,
those components and controls are suspect.
1) Remove the louver. Move the control switch to the “OFF“ position, then unplug the
appliance. Access the control box. Clear any ice from the bin control actuator located
in the bin.
2) Plug in the appliance, then place the control switch in the “ICE” position. A 5 second
delay occurs. The “POWER OK” LED on the control board comes on. If the “POWER
OK” LED is ashing (indicating a full bin), check the bin control. See “II. D. 1 Bin
Control Check”.
3) One Minute Fill Cycle – The inlet water valve is energized. After 1 minute, the control
board checks the oat switch. If the oat switch is closed, the unit cycles to harvest.
If closed, continue to step 4. If the oat switch is open, the unit repeats the 1 minute
ll cycle until water enters and the oat switch closes (low water safety protection
during initial start up and at the end of each harvest). Diagnosis: If the water valve
does not open, check for no supply voltage at water valve terminals, bad coil, or
plugged screen or external lter (no water ow). If unit fails to start harvest, check for
open oat switch or bad 1 minute timer in board.
16
4) Initial Harvest Cycle – The inlet water valve remains energized, contactor coil
energizes to start the compressor (and fan motor on a remote condenser unit),
and the hot gas valve energizes. The evaporator warms and the thermistor senses
48°F (9°C). The control board then receives the thermistor’s 3.9 kΩ signal and
turns operation of harvest over to the harvest timer. The timer completes counting
(1 to 3 minutes). The unit then cycles to freeze. Diagnosis: Check if compressor
is running, hot gas valve is open, water valve still open. Average harvest cycle at
factory setting is 2 to 3 minutes. How long does initial harvest last? 1.5 minutes after
initial harvest begins, touch the compressor discharge line. Is it hot? If not check
refrigerant pressures and compressor operation. If it is hot, touch the inlet line to the
evaporator. Is it hot? If it is hot and the freeze cycle is not starting, check the harvest
timer adjustment, the thermistor for open circuit, the discharge line temperature,
compressor efciency, and if the hot gas valve is fully open.
5) Freeze Cycle – The compressor remains energized, pump motor, (line valve if
applicable), and fan motor energize. The inlet water valve and hot gas valve deenergize. The unit is held in freeze by a 5 minute short cycle protection timer which
starts after the thermistor temperature reaches 36°F (2°C). After this period, the
freeze cycle operation is transferred to the oat switch for freeze termination. During
the rst 5 minutes of freeze, conrm that the evaporator temperature drops. After the
minimum freeze period, disconnect the oat switch at the 2-pin connector attached to
the red wires. The unit should immediately switch to the pump-out cycle. Diagnosis:
If the evaporator is not cold, check to see if the hot gas valve is still open or if the
expansion valve is not opening properly, if the water valve is continuing to ll the
reservoir, if there are improper unit pressures or an inoperative compressor. If the
unit remains in freeze with the oat switch removed, replace the board.
Note: Normal freeze cycle will last 20 to 40 minutes depending on model and
conditions. Cycle times and pressures should follow performance data provided
in this manual.
6) Pump-Out Cycle – The compressor remains energized, the hot gas valve energizes,
the fan motor de-energizes. The drain valve and pump motor energize, allowing
water to drain from the tank for 10 seconds. This removes contaminants from the
water tank. Diagnosis: If the drain valve does not open, check the circuit. Check for
proper voltage. If water does not drain out, check and clean the tubing at the drain
valve and then check and clean the valve assembly.
7) Normal Harvest Cycle – same as the initial harvest cycle – Return to step 4.
8) Shutdown – See “II. D. 1 Bin Control Check”. Note that after a bin-control initiated
shutdown, there is a 90 second minimum off time.
Note: Unit continues to cycle until bin control is satised or power is turned off. (The
pump-out cycle can be adjusted to occur every cycle, or every 2, 5, or 10 cycles.
The factory default is every 10 cycles.) The unit always restarts at the 1 minute
ll cycle.
17
C. Control Board Check
Before replacing a control board that does not show a visible defect and that you
suspect is bad, always conduct the following check procedure. This procedure will help
you verify your diagnosis.
Alarm Reset: If CB is in alarm (beeping), press the “ALARM RESET” button on CB while
CB is beeping. WARNING! Risk of electric shock. Care should be taken not to touch live terminals. Once reset, the icemaker starts at the
1-minute ll cycle. For audible alarm information, see “III.B. LED Lights
and Audible Alarm Safeties.”
1) Remove the louver. Move the control switch to the “OFF” position, then unplug the
appliance. Access the control box.
2) Check the dip switch settings to assure that S1 dip switch 3, 4, 7, 8, 9, & 10 and S2
dip switch 1 through 6 are in the factory default position. S1 dip switch 1, 2, 5, & 6
are cleaning adjustments and the settings are exible.
3) Plug in the appliance. Move the control switch to the “ICE” position and check for
proper control voltage. If the “POWER OK” LED is on, the control voltage is good.
If the “POWER OK” LED is off, check the control transformer circuit. If no voltage is
present, check the power supply circuit.
4) To perform a relay sequence test, move the control switch to the “ICE“ position while
pressing the “OUTPUT TEST” button. WARNING! Risk of electric shock. Care should be taken not to touch live terminals. The correct lighting sequence should
be 5, 6, 7, 8, 9, 4. Some components (e.g., the compressor) will cycle during test.
Each LED comes on for 5 seconds. LED 5 is on while LED 6 is on. Following the
output test sequence, the icemaker will resume normal operation beginning with the
1 minute ll cycle.
D. Bin Control Check and Cleaning
This machine uses a lever-actuated proximity switch (mechanical bin control) to control
the ice level in the storage bin. No adjustment is required.
The bin control is connected to the K1 connector (pins 4 & 5) on the control board. When
the bin control is calling for ice (proximity switch closed; “POWER OK” LED on), the
control board continues icemaking operations. When the bin control is activated in the
bin full position (proximity switch open; “POWER OK” LED ashing), the control board
drains and 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 during the
freeze cycle before the ve minute timer expires. The ve minute timer starts counting
down when the thermistor temperature reaches 36°F (2°C). If, during the freeze cycle,
ice pushes in the lever after the ve minute timer expires, the control board will allow the
18
machine to complete the freeze cycle and the following harvest cycle before shutting
down the machine.
When the bin control is activated, the “POWER OK” LED flashes. 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 Cycle15 seconds
Harvest Cycle15 seconds after the next freeze cycle starts
Freeze Cycle15 seconds if the bin control 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.
1. Bin Control Check
1) Remove the louver. Move the control switch to the “OFF” position, then unplug the
appliance. Access the control box.
2) Clear any ice away from the bin control.
3) Disconnect the bin control at the 2-pin connector attached to the black wires coming
from the K1 connector (pins 4 & 5) on the control board.
4) 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.
5) Reconnect the 2-pin connector. Plug in the appliance, then move the control switch
to the “ICE“ position. Allow the machine to cycle into the freeze cycle. In the rst 5
minutes of the freeze cycle, activate the bin control actuator (press the actuator in).
The “POWER OK” LED should ash and the machine should turn off. If not, replace
the control board.
2. Bin Control Cleaning
Scale may build up on MBC. Scale can cause the actuator paddle and magnet to stick.
In this case, MBC should be cleaned.
19
WARNING
CHOKING HAZARD: Ensure all components, fasteners, and thumbscrews are
securely in place after the icemaker is serviced. Make sure that none have fallen into
the ice storage bin.
1) Remove the louver. Move the control switch to the “OFF” position, then unplug the
appliance.
2) Remove the water tank (see “IV. C. WATER TANK“). The bin control switch is
located as shown below when viewed from the front.
Bin Control Switch
Fig. 1
3) Remove the top panel and the rear panel.
4) Disconnect the connector of the bin control switch lead (black) covered with a
silicone hose and remove the lead wire from the grommet.
5) Loosen the thumbscrew on the right side.
6) Remove the thumbscrew on the left side. Shift the bin control switch to the left to
remove.
Shift to the left
and remove
Remove Loosen
20
Fig. 2
7) Wipe down MBC with a mixture of 1 part of Hoshizaki “Scale Away” and 25 parts of
warm water. Rinse the parts thoroughly with clean water.
8) Ret the removed parts in the reverse order of the removal procedure.
9) Plug in the appliance.
Legend: MBC–mechanical bin control
E. Float Switch Check and Cleaning
FS is used to determine that there is sufcient water in the water tank after the 1-min.
ll cycle and after each harvest cycle. FS is also used to determine that the appropriate
volume of water has been converted into ice before switching out of the freeze cycle. No
adjustment is required.
1. Float Switch Check
To check FS, follow the steps below.
1) Remove the louver.
2) Drain out the water tank by leaving the control switch in the “SERVICE“ position and
the service switch in the “DRAIN“ position until the tank is empty.
3) Move the control switch to the “OFF“ position, then unplug the appliance.
4) Remove the top panel, rear panel and right side panel.
5) Disconnect the connector of the FS lead.
6) Check for continuity across FS leads. With the water tank empty, FS should be
open. If open, continue to step 7. If closed, follow the steps in “II. E. 2. Float Switch
Cleaning.“ After cleaning FS, check it again. Replace if necessary.
7) Reconnect FS connector.
8) Move the control switch to the “ICE” position. Replace the top panel, rear panel and
right side panel in their correct positions, then plug in the appliance. After 1 min.,
the 1-min. ll cycle should end and the initial harvest cycle should begin. If the initial
harvest cycle begins, FS is good and the check is complete. If the initial harvest
cycle does not begin, continue to step 9.
9)Move the control switch to the “OFF” position, then unplug the appliance.
10) Remove the top panel, rear panel and right side panel.
21
11) Disconnect the connector of the FS lead.
12) Check for continuity across FS leads. With the water tank full, FS should be closed.
If FS is closed and the icemaker will not switch from the 1-min. ll cycle to the initial
harvest cycle, replace CB.
If FS is open, conrm that the water tank is full. If the water tank is not full, check the
water supply, water lters, and inlet water valve. If the water tank is full, follow the
steps in “II.E.2. Float Switch Cleaning.” After cleaning FS, check it again. Replace if
necessary.
Legend: CB–control board; FS-oat switch
2. Float Switch Cleaning
Depending on local water conditions, scale may build up on FS. Scale on the switch can
cause the oat to stick. In this case, FS should be cleaned.
1) Remove the louver.
2) Drain out the water tank by leaving the control switch in the “SERVICE“ position and
the service switch in the “DRAIN“ position until the tank is empty.
3) Move the control switch to the “OFF“ position, then unplug the appliance.
4) Remove the top panel, rear panel and right side panel.
5) Disconnect the connector of the FS lead. Remove the two mounting screws and FS.
Lift off
Float Switch
Fig. 3
6) Wipe down shaft and oat with a mixture of 1 part Hoshizaki “Scale Away” and 25
parts warm water. Rinse the parts thoroughly with clean water.
22
7) Replace FS in its correct position and secure it with the two screws. Then connect FS
connector.
8) Replace the right side panel, rear panel and top panel in their correct positions.
9) Plug in the appliance, then move the control switch to the “ICE” position.
Legend: CB–control board; FS-oat switch
F. Thermistor Check
A thermistor (semiconductor) is used as a harvest control sensor and anti-slush sensor.
The resistance varies depending on the suction line temperatures. The thermistor
detects the temperature of the evaporator outlet to start the harvest timer or momentarily
stop the pump motor during the freeze cycle. No adjustment is required. If necessary,
check for resistance between thermistor leads, and visually check the thermistor
mounting, located on the suction line next to the evaporator outlet.
Check a thermistor for resistance by using the following procedure:
1) Remove the louver. Move the control switch to the “OFF” position, then unplug the
appliance.
2) Disconnect the connector K1 on the board.
3) Remove the thermistor.
4) Immerse the thermistor sensor portion in a glass containing ice and water for 2 or 3
minutes.
5) Check for resistance between the thermistor leads. Normal reading is within 4.7 to 6.2
kΩ. Replace the thermistor if it exceeds the normal reading.
23
G. Diagnostic Tables
1. No Ice Production
PROBLEM POSSIBLE CAUSE REMEDY
[1] The icemaker
will not start.
a) Power Supply 1. OFF position. 1. Move to ON position.
2. Loose connections. 2. Tighten.
3. Bad contacts. 3. Check for continuity and
replace.
4. Voltage too high. 4. Check and get
recommended voltage.
5. Unplugged. 5. Plug in.
b) Fuse (inside fused
disconnect, if any)
c) Control Switch 1. OFF or SERVICE position. 1. Move to ICE position.
d) Bin Control Switch 1. Tripped with bin filled with
e) High Pressure
Control
f) Transformer 1. Thermal fuse blown or coil
g) Wiring to Control
Board
h) Thermistor 1. Leads shorted or open and
i) Hot Gas Solenoid
Valve
j) Water Supply Line 1. Water supply off and water
k) Inlet Water Valve 1. Mesh filter or orifice gets
l) Control Board 1. Defective. 1. See “II.C. Control Board
1. Blown. 1. Check for short circuit
and replace.
2. Bad contacts. 2. Check for continuity and
replace.
1. Remove ice.
ice.
2. Defective reed switch. 2. Check for continuity and
replace.
1. Bad contacts. 1. Check for continuity and
replace.
1. Replace.
winding open.
1. Loose connections or open. 1. Check for continuity and
replace.
1. See “II.F. Thermistor
high temperature safety
operates. If open, unit will
start but have long harvest
cycle.
1. Continues to open in freeze
cycle and high temperature
safety operates.
supply cycle does not finish.
2. Condenser water pressure
too low or off and high
pressure control opens and
closes frequently
(water-cooled model).
clogged and water supply
cycle does not finish.
2. Coil winding open. 2. Replace.
3. Wiring to water valve. 3. Check for loose
Check”.
1. Check for power off in
freeze cycle and replace.
1. Check and get
recommended pressure.
Check for water supply.
2. Check and get
recommended pressure.
1. Clean. Replace if
necessary.
connection or open, and
replace.
Check”.
24
PROBLEM POSSIBLE CAUSE REMEDY
[2] Water
continues to be
supplied, and
the icemaker
will not start.
[3] Compressor
will not start or
operates
intermittently.
a) Float Switch 1. Connector disconnected. 1. Reconnect.
2. Leads open or defective
2. Check and replace.
switch.
3. Float does not move freely. 3. Clean or replace.
b) Control Board 1. Defective. 1. Replace.
a) Control Switch 1. SERVICE position. 1. Move to ICE position.
2. Bad contacts. 2. Check and replace.
b) High Pressure
Control
1. Dirty air filter or condenser. 1. Clean.
2. Ambient temperature too
warm.
2. Reduce ambient
temperature.
3. Refrigerant overcharged. 3. Recharge.
4. Fan not operating. 4. See chart 1 - [6].
5. Condenser water pressure
too low or off (water-cooled
5. Check and get
recommended pressure.
model).
6. Condenser water
temperature too warm
(water-cooled model).
7. Refrigerant line or
6. Check and get
recommended
temperature.
7. Clean and replace drier.
components plugged.
c) Overload
Protector
1. Bad contacts. 1. Check for continuity and
replace.
2. Voltage too low. 2. Increase voltage.
3. Refrigerant overcharged or
3. Recharge.
undercharged.
d) Starter 1. Bad contacts. 1. Check and replace.
2. Coil winding open. 2. Replace.
e) Start Capacitor 1. Defective. 1. Replace.
f) Power Relay 1. Bad contacts. 1. Check for continuity and
replace.
2. Coil winding open. 2. Replace.
g) Compressor 1. Wiring to compressor. 1. Check for loose
connection or open, and
replace.
2. Defective. 2. Replace.
3. Protector tripped. 3. Reduce temperature and
verify cause.
h) Control Board 1. Defective. 1. See “II.C. Control Board
Check”.
i) Condenser, Air
1. Clogged with dirt and dust. 1. Clean and unclog.
Filter
j) Water Regulating
Valve
1. Set too high. 1. Adjust lower.
2. Clogged or defective. 2. Clean or replace.
(water-cooled
model)
25
PROBLEM POSSIBLE CAUSE REMEDY
[4] Water
continues to
be supplied in
freeze cycle.
a) Inlet Water Valve 1. Diaphragm does not close. 1. Check for water leaks
with icemaker off.
Replace if necessary.
b) Control Board 1. Defective. 1. See “II.C. Control Board
Check”.
[5] No water
comes from
Spray Tubes.
Water Pump
will not start,
or freeze
cycle time is
too short.
a) Water Supply Line 1. Water pressure too low and
water level in water tank too
1. Check and get
recommended pressure.
low.
b) Inlet Water Valve 1. Dirty mesh filter or orifice
1. Clean.
and water level in water tank
too low.
c) Water System 1. Water leaks. 1. Check connections for
water leaks, and replace.
2. Clogged. 2. Clean.
d) Pump Motor 1. Motor winding open. 1. Replace.
2. Bearing worn out. 2. Replace.
3. Wiring to pump motor. 3. Check for loose
connection or open, and
replace.
4. Defective capacitor. 4. Replace.
5. Defective or bound impeller.5. Replace and clean.
e) Control Board 1. Defective. 1. See “II.C. Control Board
Check”.
[6] Fan Motor will
not start, or is
not operating.
a) Fan Motor 1. Motor winding open. 1. Replace.
2. Bearing worn out. 2. Replace.
3. Wiring to fan motor. 3. Check for loose
connection or open, and
replace.
4. Fan blade bound (locked fan
4. Check and replace.
motor).
b) Control Board 1. Defective. 1. See “II.C. Control Board
Check”.
[7] All
components
run but no ice
is produced.
a) Refrigerant 1. Undercharged. 1. Check for leaks and
recharge.
2. Air or moisture trapped. 2. Replace drier, and
recharge.
b) Compressor 1. Defective. 1. Replace.
c) Hot Gas Solenoid
Valve
1. Continues to open in freeze
cycle.
1. Check and replace.
26
2. Freeze-Up
Defrost and clean the icemaker prior to diagnosing freeze-up. Fill out a freeze-up check
list.
See the Hoshizaki America Technician’s Pocket Guide or contact your local distributor
for a copy of the freeze-up checklist.
PROBLEM POSSIBLE CAUSE REMEDY
[1] Freeze cycle
time is too
long.
[2] All ice formed
on Evaporator
does not fall
into bin in
harvest cycle.
[3] Others a) Spray Tubes 1. Clogged. 1. Clean.
a) Float Switch 1. Leads shorted or defective
switch.
2. Float does not move freely. 2. Clean or replace.
b) Inlet Water Valve 1. Diaphragm does not close. 1. Check for water leaks
c) Control Board 1. Defective. 1. See “II.C. Control Board
a) Evaporator 1. Scaled up. 1. Clean.
b) Water Supply Line1. Water pressure too low. 1. Check and get
c) Inlet Water Valve 1. Dirty mesh filter or orifice. 1. Clean.
2. Diaphragm does not close. 2. Check for water leaks
d) Ambient and/or
water temperature
e) Thermistor 1. Out of position or loose
f) Control Board 1. Harvest timer is set too
b) Water System 1. Dirty. 1. Clean.
c) Refrigerant 1. Undercharged. 1. Check for leaks and
d) Expansion Valve 1. Bulb out of position or loose
e) Hot Gas Solenoid
Valve
f) Water Supply Line1. Too small; requires minimum
g) Water Filter 1. Flow rate too small. 1. Replace with filter that
1. Too cool. 1. Increase temperature.
attachment.
short.
2. Defective. 2. See “II.C. Control Board
2. Out of position. 2. Place in position.
attachment.
2. Defective. 2. Replace.
1. Coil winding open. 1. Replace.
2. Plunger does not move. 2. Replace.
3. Wiring to hot gas valve. 3. Check for loose
1/4" nominal ID copper water
tubing or equivalent line
dedicated per machine.
1. Check and replace.
with icemaker off.
Replace if necessary.
Check”.
recommended pressure.
with icemaker off.
Replace if necessary.
1. See “II.F. Thermistor
Check”.
1. Adjust longer, referring to
“III.C.2 Harvest Timer”.
Check”.
recharge.
1. Place in position.
connection or open, and
replace.
1. Increase water supply
line size.
has larger flow rate.
27
3. Low Ice Production
PROBLEM POSSIBLE CAUSE REMEDY
[1] Freeze cycle
time is long.
[2] Harvest cycle
time is long.
a) See chart 1 - [3] and check dirty air filter or condenser, ambient or water
temperature, water pressure, water regulating valve (water-cooled model), and
refrigerant charge.
b) See chart 2 - [1] and check float switch, inlet water valve, and control board.
a) See chart 2 - [2] and check control board, thermistor, evaporator, ambient and/or
water temperature, water supply line, and inlet water valve.
4.Abnormal Ice
PROBLEM POSSIBLE CAUSE REMEDY
[1] Small cubes a) Cube Guide,
Water Tank
b) See chart 1 - [5] and check water supply line, inlet water valve, water system,
pump motor, and control board.
[2] Cloudy or
irregular cubes
a) See chart 2 - [1] and - [3] and check float switch, inlet water valve, control board,
spray tubes, water system, refrigerant charge and expansion valve.
b) Spray Guide 1. Dirty. 1. Clean.
c) Water Quality 1. High hardness or contains
1. Out of position. Circulated
water falls into bin.
impurities.
1. Check that cube guide is
properly installed on
water tank and tank is
fixed securely with snaps.
1. Install a water filter or
softener.
28
5.
Other
PROBLEM POSSIBLE CAUSE REMEDY
[1] Icemaker will
not stop when
bin is filled with
ice.
[2] Abnormal
noise
[3] Ice in Storage
Bin often
melts.
a) Bin Control Switch1. Completely disconnected
and dropped inside bin.
2. Detector broken. 2. Replace.
3. Detector out of position. 3. Place in position.
4. Defective reed switch. 4. Check for continuity and
5. Reed switch out of position. 5. Place in position.
6. Magnet disconnected from
detector.
b) Control Board 1. Defective. 1. See “II.C. Control Board
a) Pump Motor 1. Bearings worn out. 1. Replace.
b) Fan Motor 1. Bearings worn out. 1. Replace.
2. Fan blade deformed. 2. Replace fan blade.
3. Fan blade does not move
freely.
c) Compressor 1. Bearings worn out, or
cylinder valve broken.
2. Mounting pad out of position
or loose hold-down bolt.
d) Refrigerant Lines 1. Rub or touch lines or other
surfaces.
a) Bin Drain 1. Plugged. 1. Clean.
1. Place in position.
replace.
6. Place in position.
Check”.
3. Replace.
1. Replace.
2. Reinstall.
1. Reposition.
29
III. Controls and Adjustments
* A HOSHIZAKI exclusive solid-state control is employed in crescent cubers.
* All models are pretested and factory-adjusted.
NOTICE
• Fragile, handle very carefully.
• The control board contains integrated circuits, which are susceptible to failure due
to static discharge. It is especially important to touch the metal part of the icemaker
when handling or replacing the control board.
• Do not touch the electronic devices on the control board or the back of the control
board.
• Do not change wiring and connections.
• Do not short out power supply to test for voltage.
• Always replace the whole control board assembly if it goes bad.
30
A. Control Board Layout
1. Control Board Layout
• Relay LEDs (6)
(indicate which
relays are energized
as listed below)
• LED 5 (X1 Relay)
Compressor (Comp)
Fan Motor-Remote
(FMR)
• LED 6 (X2 Relay)
Hot Gas Valve (HGV)
Fan Motor (FM)
(FM off when LED on)
Liquid Line Valve (LLV)(FM and LLV off when LED on)
• LED 8 (X4 Relay)
Inlet Water Valve (WV)
(WV1) on units with
inlet water valves
• LED 9 (X5 Relay)Inlet Water Valve (WV) on units with inlet water valves
• LED 4 (X6 Relay)
Drain Valve (DV)
• LED 7 (X3 Relay)
Pump Motor (PM)
"H" Control Board
• K7 Connector
Transformer
• K3 Connector
Power Relay
Magnetic Contactor
• "POWER OK" LED
(Lights when power is
supplied to the board.
Flashes when bin
control is activated.)
• K5 Connector
Pins
#1 Fan Motor (FM)
Liquid Line Valve (LLV)
# Hot Gas Valve
#3 Pump Motor
#4 Inlet Water Valve
#5 Open
#6 Drain Valve
• K6 Connector
Open
• K1 Connector
Pins
#1, 3 Float Switch
# Open
#4, 5 Bin Control
#6, 7 Thermistor
#8, 9 Open
• S1 Dip Switch
• S2 Dip Switch
Control Board
Part NumberP01771-02
TypeHKM2006V003
31
• Alarm Buzzer
• "OUTPUT TEST" Button
(used to test relays on
control board)
• "ALARM RESET" Button
B. LED Lights and Audible Alarm Safeties
The control board includes LED indicator lights, audible alarm safeties, and an output
test feature. The “POWER OK” LED indicates control voltage and will remain on unless
a control voltage problem occurs. The “POWER OK” LED ashes continuously when the
bin is full and DV energizes for a maximum of 5 minutes to drain the water tank.
At startup, a 5 second delay occurs to stabilize the circuit. LEDs 4 through 8 energize
and sequence from initial startup as listed in the table below. Note that the order of the
LEDs from the outer edge of the board is 5, 6, 8, 9, 4, 7. For more information, see “II. A.
Sequence of Operation”.
Sequence StepLED
1 Minute Fill Cycle8WV60 seconds
Harvest Cycle5, 6, 8
Last 0, 10, 30, or 50 seconds (adjustable by dip switch) of harvest, WV de-energizes
and PM energizes (LEDs 5, 6, and 7 are on)
Freeze Cycle5, 7
Pump-Out Cycle5, 6, 4, 7
The built in safeties shut down the unit and have alarms as listed below.
No. of Beeps
(every 3 sec.)
High Evaporator Temp.
1
2
3
To reset the above safeties, press the “ALARM RESET” button with the power supply
on.
6
7
Legend:
(temperature > 127°F (53°C))
Harvest Backup Timer
(harvest > 20 min. for two
cycles in a row)
Freeze Timer
(freeze > specied setting for
two cycles in a row)
Timer is factory set using S1
dip switch 9 & 10
Low Voltage
(92Vac ± 5% or less)
High Voltage
(147Vac ± 5% or more)
Comp–compressor; DV–drain valve; FMS–self-contained fan motor; HGV–hot
gas valve; PM–pump motor; TXV–thermostatic expansion valve; WRV–water
regulating valve; WV–inlet water valve
Type of AlarmNotes
Energized
Components
WV, HGV,
Comp
Comp, PM,
FMS
Comp, HGV,
DV, PM
Min.Max.Avg.
2 minutes20 minutes3 to 5 minutes
5 minutes
10 seconds 20 seconds
Check for harvest problem (stuck HGV or
relay), hot water entering unit, stuck HM, or
shorted thermistor.
Check for open thermistor, HGV not
opening, TXV leaking by, low charge,
inefcient Comp, or WRV leaking by.
Check for a oat switch stuck closed (up),
WV leaking by, HGV leaking by, PM not
pumping, TXV not feeding properly, low
charge, or inefcient Comp.
“POWER OK” LED will turn off if voltage
protection operates.
The control voltage safeties automatically
reset when voltage is corrected.
Time LEDs are On
freeze timer
setting
25 to 30 minutes
factory default
setting
32
C. Settings and Adjustments
NOTICE
Dip switches are factory set. Failure to maintain factory settings may adversely
affect performance and warranty coverage.
1. Default Dip Switch Settings
The dip switch is factory-adjusted to the following positions:
Do not adjust the S2 dip switch. These must be left in the factory default position, or
the unit will not operate properly. The S2 dip switch No. 6 is factory-adjusted to the
“ON” position for the auxiliary codes G1 and H0. Change it to the “OFF” position when
replacing the control board. This does not affect the product performance but prevents
cloudy ice even in poor water quality areas.
S1 Dip SwitchS2 Dip Switch
Anti-Slush Control (6)
Freeze Timer (9 & 10)
Harvest Pump Timer (7 & 8)
Pump-Out Frequency Control
(5 & 6)
Pump-Out Timer (3 & 4)
Harvest Timer (1 & 2)
Overfreeze Detection Control (5)
Harvest Completion Detection
Control (4)
Rell Counter (3)
Harvest Promotion Control (2)
Pump-Out/Drain Selector (1)
Fig. 4 Fig. 5
2. Harvest Timer (S1 dip switch 1 & 2)
The harvest timer starts counting when the thermistor reached 48°F (9°C) at the
evaporator outlet and the control board reads 3.9 kΩ from the thermistor. The harvest
33
timer is factory set, and generally no adjustment is required. However, a setting
longer than the factory setting may be advised in cases where the drain provided at
harvest needs to be prolonged for extra cleaning. Before changing this setting, contact
Hoshizaki Technical Support at 1-800-233-1940 for recommendations. Keep in mind that
setting the harvest timer to a longer setting decreases 24-hour production.
Note that the pump-out timer (S1 dip switch 3 & 4) acts in place of the harvest timer
during cycles with a pump out. For details, see “III. C. 3. Pump-Out Timer (S1 dip switch
3 & 4).“
Note: On models with a pump-out every cycle, the harvest timer is only relevant during
the initial harvest cycle since a pump out occurs every cycle there after.
Dip Switch Setting
No. 1No. 2
OFFOFF60
ONOFF90
OFFON120
ONON180
3. Pump-Out Timer (S1 dip switch 3 & 4)
When a pump-out is called for, the pump motor stops for 2 seconds, then the pump
motor and drain valve energize. Water is removed from the bottom of the water tank
and sent down the drain. The pump-out drains the water tank for the time determined
by the pump-out timer. The pump-out timer also acts in place of the harvest timer during
cycles with a pump-out. The pump-out timer is factory set, and generally no adjustment
is required. The pump-out timer control can be set to pump-out for 10 or 20 seconds.
Dip Switch SettingTime (seconds)
No. 3No. 4T1T2
OFFOFF10120
ONOFF20160
OFFON20120
ONON20180
Time
(seconds)
T1: Time to drain the water tank
T2: Harvest timer at pump-out
4. Pump-Out Frequency Control (S1 dip switch 5 & 6)
The water tank drains at the frequency set by the pump-out frequency control.
The pump-out frequency control is factory-adjusted to drain the water tank every 10
cycles, and no adjustment is required. However, where water quality is bad and the
icemaker needs a pump-out more often, the pump-out frequency can be adjusted as
shown in the table below.
34
Dip Switch Setting
No. 5No. 6
OFFOFFevery cycle
ONOFFevery 2 cycles
OFFONevery 5 cycles
ONONevery 10 cycles
5. Harvest Pump Timer (S1 dip switch 7 & 8)
The harvest pump timer allows the water valve to close and the pump motor to circulate
water in the tank during the nal part of harvest. The water valve is open during harvest
for a maximum of 6 minutes or the length of harvest minus 0, 10, 30, or 50 seconds
(determined by the harvest pump timer setting), whichever is shorter. When the water
valve closes, the pump motor energizes and runs for the time determined by the harvest
pump timer setting.
The harvest pump timer is factory-adjusted, and no adjustment is required.
Frequency
Dip Switch Setting
No. 7No. 8
OFFOFF0
ONOFF10
OFFON30
ONON50
6. Freeze Timer (S1 dip switch 9 & 10)
Time
(seconds)
NOTICE
Adjust to proper specication, or the unit may not operate correctly.
The freeze timer setting determines the maximum allowed freeze time to prevent
possible freeze-up issues. Upon termination of freeze timer, machine initiates the
harvest cycle. After 2 consecutive timer terminations, machine will shut down, possibly
indicating a problem.
The freeze timer is factory adjusted, and no adjustment is required.
Dip Switch Setting
No. 9No. 10
OFFOFF60
ONOFF50
OFFON70
ONON100
Time
(minutes)
35
7. Pump-Out/Drain Selector (S2 dip switch 1)
The pump-out/drain selector setting determines whether the pump motor energizes
(pump-out) or stays off (drain) after a 2-second delay at the beginning of the pump-out
cycle or at shutdown. Regardless of the pump-out/drain selector setting, the drain valve
energizes after a 2-second delay at the beginning of the pump-out cycle or at shutdown.
When the pump-out/drain selector is set to pump-out, the pump motor takes water from
the tank and forces it through the drain valve and down the drain. When the pump-out/
drain selector is set to drain, water drains by gravity through the drain valve.
S2 Dip Switch Setting
No. 1
OFFDrain
ONPump-out
8. Harvest Promotion Control (S2 dip switch 2)
Do not adjust. This must be left in the factory default position or the unit will not operate
properly.
When activated, this control promotes harvest of ice on the evaporator that is hard to
remove. If the harvest cycle exceeds 6 minutes, the pump motor starts to operate for a
maximum of 3 minutes.
S2 Dip Switch Setting
No. 2
OFFActivated
ONDeactivated
9. Rell Counter (S2 dip switch 3)
Pump Operation Setting
Harvest Promotion
Control
Do not adjust. This must be left in the factory default position or the unit will not operate
properly. The KM-230BAJ and KM-300BAJ/BWJ do not rell.
10. Harvest Completion Detection Control (S2 dip switch 4)
Do not adjust. This must be left in the factory default position or the unit will not operate
properly.
It is deactivated on the KM-230BAJ and KM-300BAJ/BWJ.
When activated, this control determines whether ice remains on the evaporator at the
end of a harvest cycle and at the beginning of a freeze cycle. If ice drops and activates
the bin control switch in the last 10 seconds of a harvest cycle, the control determines
that ice still remains on the evaporator and extends the harvest cycle for 30 seconds.
If the bin control switch is activated at the beginning of a freeze cycle, the control
determines that ice still remains on the evaporator and starts a harvest cycle after the
minimum freeze cycle time has passed.
36
S2 Dip Switch Setting
No. 4
OFFDeactivated
ONActivated
11. Overfreeze Detection Control (S2 dip switch 5)
Do not adjust. This must be left in the factory default position or the unit will not operate
properly.
It is deactivated on the KM-230BAJ and KM-300BAJ/BWJ.
When activated, the thermistor detects the temperature of the evaporator outlet to nd
overfreeze in a harvest cycle and at the beginning of a freeze cycle. If the difference
between the maximum temperature after the harvest pump timer starts counting and the
temperature at the end of a harvest cycle is 7.2°F (4°C) or more and if the temperature
at the end of a harvest cycle is 48°F (9°C) or less, the harvest cycle is extended for 30
seconds. If the difference between the temperature at the beginning of a freeze cycle
and the minimum temperature after 30 seconds in the freeze cycle is 2.5K or more
and less than 3.5K, the next harvest cycle is extended for 30 seconds. If the above
conditions occur in succession, the number of occurrence times 30 seconds will be
added to the harvest cycle time. If the above temperature difference is 3.5K or more, the
freeze cycle ends after the minimum freeze cycle time and a harvest cycle starts.
If the evaporator outlet temperature is more than 3.5°C but not more than 5°C at the end
of harvest cycle, the harvest cycle is extended for 50 seconds before moving on to the
freeze cycle. If the evaporator outlet temperature is 3.5°C or less, another harvest cycle
starts. The harvest cycle does not repeat more than three times. The freeze cycle starts
even if the evaporator outlet temperature is 3.5°C or less at the end of the third harvest
cycle.
Harvest Completion
Detection Control
S2 Dip Switch Setting
No. 5
OFFDeactivated
ONActivated
12. Anti-Slush Control (S2 dip switch 6)
Do not adjust. This must be left in the factory default position or the unit will not operate
properly.
When activated (Ver. 1.1), the thermistor located on the suction line checks for a 41°F
(5°C) temperature as the evaporator cools. When 41°F (5°C) is reached, a 4.8 kΩ signal
causes the control board to de-energize the pump motor for 10 seconds.
When activated (Ver. 2.0), the thermistor located on the suction line checks for a 50°F
(10°C) temperature as the evaporator cools. When 50°F (10°C) is reached, a 3.9 kΩ
signal causes the control board to de-energize the pump motor for 10 seconds and
energize it for 50 seconds repeatedly. When 34°F (1°C) is reached, a 5.9 kΩ signal
causes the control board to de-energize the pump motor for 10 seconds, energize it for
50 seconds, de-energize it again for 10 seconds, then energize it continuously.
Overfreeze Detection
Control
37
S2 Dip Switch Setting
No. 6
Anti-Slush Control
OFFActivated (Ver. 1.1)
ONActivated (Ver. 2.0)
13. Control Board Replacement
The dip switches should be adjusted to the factory default settings as outlined in this
manual.
D. Switches
Two different control switches are used for operation. They are located on the right side
of the control box which becomes accessible when the front louver is removed. The
upper is the control switch, and the lower is the service switch.
1. Control Switch
This switch is used to place the machine into one of three modes: “OFF” (center
position), “ICE” (upper position), and “SERVICE” (lower position).
2. Service Switch
When the control switch is in the “SERVICE” position, the control switch supplies power
to the service switch and the machine is in service mode. The service switch has three
positions: “DRAIN”, “CIRCULATE”, and “WASH”. See the information below for details
of each function.
Note: 1. When the service switch is activated, power is supplied to the water pump in
all three positions.
2. When the control switch is in the “OFF” position or in the “ICE” position, the
service switch has no power and can be left in any position.
1) DRAIN
This machine utilizes a pump-out drain
system. When the service switch is active
and placed in the “DRAIN” position, power is
supplied to the pump and drain valve.
ICE
OFF
SERVICE
WASH
CIRCULATE
DRAIN
Control Switch
Service Switch
38
Fig. 6
2) CIRCULATE
When the service switch is active and placed in the “CIRCULATE” position, power is
supplied to the pump only. This operation can be used to circulate cleaner for extended
periods of time over the outside surface of the evaporator.
3) WASH
This machine utilizes a solenoid operated wash (bypass) valve. When the service switch
is active and placed in the “WASH” position, power is supplied to the pump and cleaning
valve. This operation is used to circulate cleaner and sanitizer over both the inside and
outside of the evaporator.
39
IV. Refrigeration Circuit and Component Service Information
WARNING
• This appliance should be diagnosed and repaired only by qualied service
personnel to reduce the risk of death, electric shock, serious injury, or re.
• To reduce the risk of electric shock, do not touch the control switch or plug with
damp hands. Make sure the control switch is in the "OFF" position before plugging
in or unplugging the appliance.
• Move the control switch to the "OFF" position and unplug the appliance from the
electrical outlet before servicing.
• CHOKING HAZARD: Ensure all components, fasteners, and thumbscrews are
securely in place after any maintenance is done to the appliance. Make sure that
none have fallen into the storage bin.
• Make sure all food zones in the icemaker and storage bin are clean after service.
A. Refrigeration Circuit Service Information
WARNING
• Repairs requiring the refrigeration circuit to be opened must be performed by
properly trained and EPA-certied service personnel.
• Use an electronic leak detector or soap bubbles to check for leaks. Add a trace of
refrigerant to the system (if using an electronic leak detector), and then raise the
pressure using nitrogen gas (140 PSIG). Do not use R-404A as a mixture with
pressurized air for leak testing.
NOTICE
• Always recover the refrigerant and store it in an approved container. Do not
discharge the refrigerant into the atmosphere.
• Do not leave the system open for longer than 15 min. when replacing or servicing
parts. The Polyol Ester (POE) oils used in R-404A applications can absorb
moisture quickly. Therefore it is important to prevent moisture from entering the
system when replacing or servicing parts.
• Always install a new drier every time the sealed refrigeration system is opened.
Do not replace the drier until after all other repair or replacement has been made.
Install the new drier with the arrow on the drier in the direction of the refrigerant
ow.
• When brazing, protect the drier by using a wet cloth to prevent the drier from
overheating. Do not allow the drier to exceed 250°F (121°C).
40
1. Refrigerant Recovery
The icemaker is provided with a low-side refrigerant access valve. Using proper
refrigerant practices, recover the refrigerant from the access valve and store it in an
approved container. Do not discharge the refrigerant into the atmosphere. After recovery
is complete, install a proper, permanent high-side access valve.
2. Brazing
WARNING
• R-404A itself is not ammable at atmospheric pressure and temperatures up to
176°F (80°C).
• R-404A itself is not explosive or poisonous. However, when exposed to high
temperatures (open ames), R-404A can be decomposed to form hydrouoric acid
and carbonyl uoride both of which are hazardous.
• Do not use silver alloy or copper alloy containing arsenic.
1) Braze all ttings while purging with nitrogen gas owing at a pressure of 3 to 4
PSIG.
Note: Because the pipes in the evaporator case are specially coated to resist
corrosion, it is important to make connections outside the evaporator case
when possible. If it is necessary to braze inside the evaporator case, use
sandpaper to remove the coating from the brazing connections before
unbrazing the components.
NOTICE
• Always install a new drier every time the sealed refrigeration system is opened.
• Do not replace the drier until after all other repair or replacement has been made.
Install the new drier with the arrow on the drier in the direction of the refrigerant
ow.
• When brazing, protect the drier by using a wet cloth to prevent the drier from
overheating. Do not allow the drier to exceed 250°F (121°C).
2) Use an electronic leak detector or soap bubbles to check for leaks. Add a trace of
refrigerant to the system (if using an electronic leak detector), and then raise the
pressure using nitrogen gas (140 PSIG). Do not use R-404A as a mixture with
pressurized air for leak testing.
3. Evacuation and Recharge (R-404A)
1) Attach a vacuum pump to the system. Be sure to connect the charging hoses to
both the low-side access valve and the eld-installed high-side access valve.
41
IMPORTANT
The vacuum level and vacuum pump may be the same as those for current
refrigerants. However, the rubber hose and gauge manifold to be used for
evacuation and refrigerant charge should be exclusively for POE oils.
2) Turn on the vacuum pump. Open the gauge manifold valves. Never allow the oil in
the vacuum pump to ow backwards.
3) Allow the vacuum pump to pull down to a 29.9” Hg vacuum. Evacuating period
depends on pump capacity.
4) Close the low-side valve and high-side valve on the gauge manifold.
5) Disconnect the gauge manifold hose from the vacuum pump and attach it to
a refrigerant service cylinder. Remember to loosen the connection and purge
the air from the hose. For the required refrigerant charge, see the nameplate.
Hoshizaki recommends only virgin refrigerant or reclaimed refrigerant which meets
AHRI Standard 700 (latest edition) be used.
6) A liquid charge is required when charging an R-404A system (to prevent
fractionation). Place the service cylinder on the scales; if the service cylinder is not
equipped with a dip tube, invert the service cylinder, then place it on the scales.
Open the high-side valve on the gauge manifold.
7) Allow the system to charge with liquid until the proper charge weight is met.
8) If necessary, add any remaining charge to the system through the low-side.
NOTICE! To prevent compressor damage, use a throttling valve or liquid
dispensing device to add the remaining liquid charge through the low-side
access valve with the appliance running.
9) Close the gauge manifold valves, then disconnect the gauge manifold hoses.
10) Cap the access valves to prevent a possible leak.
B. Component Service Information
NOTICE
When replacing a component listed below, see the notes to help ensure proper
operation.
ComponentNotes
CompressorInstall a new start capacitor and start relay (if applicable).
Thermostatic
Expansion Valve
• Attach the thermostatic expansion valve bulb to the suction line in the same
location as the previous bulb.
• The bulb should be between the 10 and 2 o'clock positions on the tube.
• Secure the bulb with the clamp and holder, then insulate it.
42
Hot Gas Valve• Replace the strainer if applicable.
• Use copper tube of the same diameter and length when replacing valve lines.
Pump MotorInstall a new capacitor.
Fan MotorInstall a new capacitor.
Thermistor• Attach the new thermistor to the same location on the previous thermistor.
• Smoothly ll the recessed area of the thermistor holder with high thermal
conductive type sealant. Hoshizaki America part number 4A0683-01 (Silicone
Heat Sink Compound 10-8108 manufactured by GC Electronics), KE-4560 RTV
(manufactured by ShinEtsu Silicones), or equivalent are recommended.
• Attach the new thermistor in position and press down the thermistor holder over the
thermistor.
• Be very careful to prevent damage to the leads.
C. Water Tank
1) Drain out the water tank by leaving the control switch in the “SERVICE” position and
the service switch in the “DRAIN” position until the tank is empty.
2) Move the control switch to the “OFF” position, then unplug the appliance. Remove
all ice from the storage bin.
3) Disconnect the overow pipe.
4) Remove the two thumbscrews. Pull the water tank slightly toward you and push it
down. Be careful to avoid breakage when handling the parts. See Fig. 7.
Water Tank
Overow Pipe
Thumbscrew
Fig. 7
5) Ret the water tank in the reverse order of the removal procedure.
6) Plug in the appliance, then move the control switch to the “ICE” position.
43
D. Separator
IMPORTANT
• The front separator and rear separator are attached to the evaporator bracket with
different lengths of pins. The front separator pins (10.7 mm) are longer than the
rear separator pins (8.8 mm). Do not misplace the front and rear separators.
• Do not attach the separators upside down or inside out. Make sure that the side
printed with “THIS SIDE UP” faces up, and the side printed with “EVAPORATOR
SIDE” faces the evaporator.
1) Move the control switch to the “OFF” position, then unplug the appliance.
2) Remove the top panel, rear panel and side panels.
3) Remove the top cover and front cover. See Fig. 8.
Top Cover
Spray Tube
Front Cover
Silicone Hose
Rear Separator
Front Separator Pin
Fig. 8
44
4) Disconnect the silicone hose from the spray tube, and remove the spray tube from
the evaporator bracket.
5) Remove the front separator by pushing the pins inserted into both sides of the
evaporator bracket toward the center. See Fig. 8.
Note: Be careful not to break the pins.
6) The rear separator is hooked on the groove in the evaporator bracket. Remove the
rear separator by lifting it up and down. See Fig. 8.
7) Ret the separators in the reverse order of the removal procedure. Check that the
separators are t correctly and can swing like a pendulum.
8) Plug in the appliance, then move the control switch to the “ICE” position..
E. Door
1) Open the door.
2) Unscrew and remove the hinges on both sides, and remove the door.
3) Ret the removed parts in the reverse order of the removal procedure. Check that
the door opens and closes smoothly.
Door
Hinge
Fig. 9
45
F. Adjustment of Water Regulating Valve (Water-Cooled Model)
The water regulating valve (also called "water regulator") is factory-adjusted. No
adjustment is required under normal use. Adjust the water regulating valve, if necessary,
using the following procedures.
1) Prepare a thermometer to check the condenser drain temperature. Attach a pressure
gauge to the high-side line of the system.
2) Five minutes after a freeze cycle starts, conrm that the thermometer reads 104°F to
115°F (40°C to 46°C). If it does not, rotate the adjustment screw by using a at blade
screwdriver until the temperature is in the proper range. See Fig. 10. Next, check
that the reference pressure is in the range indicated in the Head Pressure table.
See “VIII. B. Performance Data”. If it is not in the proper range, verify the refrigerant
charge.
3) Check that the condenser drain temperature is stable.
Fig. 10
46
V. Maintenance
The appliance must be maintained in accordance with the instruction manual and labels
provided.
WARNING
• Only qualied service technicians should service the appliance.
• To reduce the risk of electric shock, do not touch the control switch, service switch,
or plug with damp hands. Make sure the control switch is in the "OFF" position
before plugging in or unplugging the appliance.
• Move the control switch to the "OFF" position and unplug the appliance from the
electrical outlet before servicing.
• CHOKING HAZARD: Ensure all components, fasteners, and thumbscrews are
securely in place after any maintenance is done to the appliance. Make sure that
none have fallen into the ice storage bin.
A. Maintenance Schedule
The maintenance schedule below is a guideline. More frequent maintenance may be
required depending on water quality, the appliance’s environment, and local sanitation
regulations.
Maintenance Schedule
FrequencyAreaTask
DailyScoop
Bi-WeeklyAir FilterInspect. Wash with warm water and neutral cleaner if dirty.
External Water
Filters
Monthly
Icemaker Exterior
Icemaker and ice
Storage Bin Liner
Yearly
Water Supply Inlet
Condenser
Water HosesInspect the water hoses and clean/replace if necessary.
Clean the ice scoop using a neutral cleaner. Rinse thoroughly after
cleaning.
Check for proper pressure and change if necessary.
Wipe down with a clean, soft cloth. Use a damp cloth containing
a neutral cleaner to wipe off oil or dirt build up. Clean any chlorine
staining (rust colored spots) using a non-abrasive cleanser.
Clean and sanitize per the cleaning and sanitizing instructions
provided in the instruction manual or on the maintenance label on
the icemaker.
Close the icemaker water supply line shut-off valve and drain the
water system. Clean the water supply inlet screen.
Inspect. Clean if necessary by using a brush or vacuum cleaner.
More frequent cleaning may be required depending on location.
47
VI. Preparing the Appliance for Periods of Non-Use
NOTICE
• During extended periods of non-use, extended absences, or in sub-freezing
temperatures, follow the instructions below to reduce the risk of costly water
damage.
• To prevent damage to the water pump, do not leave the control switch in the
“SERVICE” position for extended periods of time when the water tank is empty.
During extended periods of non-use, extended absences, or in sub-freezing
temperatures, follow the instructions below. When the appliance is not used for two or
three days under normal conditions, it is sufcient to move the control switch to the “OFF”
position.
1. Remove the water from the icemaker water supply line:
1) Remove the louver if it has not already been removed.
2) Move the control switch to the “OFF” position.
3) Wait 3 minutes.
4) Close the icemaker water supply line shut-off valve and open the icemaker water
supply line drain valve.
5) Allow the line to drain by gravity.
6) Attach compressed air or carbon dioxide supply to the icemaker water supply line
drain valve.
7) Move the control switch to the “ICE” position.
8) Quickly blow the icemaker water supply line out using compressed air or carbon
dioxide.
2. Drain the water tank:
1) Move the service switch to the“DRAIN” position, then move the control switch to the
“SERVICE” position.
2) After 2 minutes, move the control switch to the “OFF” position. Unplug the appliance
from the electrical outlet.
3) Open the door. Remove all ice from the ice storage bin and clean the ice storage
bin.
48
4) Close the door.
5) Replace the louver in its correct position.
6) Close the icemaker water supply line drain valve.
3. On water-cooled model only, remove the water from the water-cooled condenser:
1) Make sure the control switch is in the “OFF” position and the appliance is unplugged
from the electrical outlet.
2) Remove the top and left side panels.
3) Close the condenser water supply line shut-off valve. If connected to a closed loop
system, also close the condenser return line shut-off valve.
4) Open the condenser water supply line drain valve. If connected to a closed loop
system, also open the condenser return line drain valve.
5) Attach a compressed air or carbon dioxide supply to the condenser water supply line
drain valve.
6) Open the water regulating valve by using a screwdriver to pry up on the spring
retainer underneath the spring. While holding the valve open, blow out the
condenser using the compressed air or carbon dioxide supply until water stops
coming out.
7) Close the condenser water supply line drain valve. If connected to a closed loop
system, also close the condenser return line drain valve.
8) Replace the left side and top panels in their correct positions.
VII. Disposal
The appliance contains refrigerant and must be disposed of in accordance with
applicable national, state, and local codes and regulations. Refrigerant must be
recovered by properly certied service personnel.
AC SUPPLY VOLTAGE115/60/1
AMPERAGE6.5 A ( 5 Min. Freeze AT 104°F / WT 80°F)
MINIMUM CIRCUIT AMPACITY15 A
MAXIMUM FUSE SIZE15 A
APPROXIMATE ICE PRODUCTIONAmbientWATER TEMP. (°F)
PER 24 HR.Temp.(°F)507090
lbs./day ( kg/day )70*230 (104)211 (96)191 (87)
Reference without *marks80215 (98)186 (84)170 (77)
90211 (96)*165 (75)147 (67)
100209 (95)161 (73)*130 (59)
SHAPE OF ICECrescent Cube
ICE PRODUCTION PER CYCLE4.0 lbs. (1.82kg) 182 pcs.
APPROXIMATE STORAGE CAPACITY80 lbs. (36kg)
ELECTRIC & WATER CONSUMPTION90/70°F70/50°F
ELECTRIC W (kWH/100 lbs.)530(7.78)510(5.27)
WATER gal./24HR (gal./100 lbs.)37(22.5)57(24.8)
ENERGY STAR 3.0No
EXTERIOR DIMENSIONS24" x 28" x 39" (612 x 712 x 990 mm)
(WxDxH)Including 6" Adjustable legs
EXTERIOR FINISHStainless Steel, Galvanized Steel (Rear)
WEIGHTNet 137 lbs. (62 kg), Shipping 165 lbs. (75 kg)
CONNECTIONS - ELECTRICCord Connection
- WATER SUPPLYInlet 1/2" FPT
- DRAINOutlet 3/4" FPT
CUBE CONTROL SYSTEMFloat Switch
HARVESTING CONTROL SYSTEMHot Gas and Water, Thermistor and Timer
ICE MAKING WATER CONTROLTimer Controlled. Overflow Pipe
COOLING WATER CONTROLN/A
BIN CONTROL SYSTEMMechanical Level Switch with Delay
COMPRESSORHermetic, Model NF7CLX
CONDENSERAir-Cooled, Fin and tube type
EVAPORATORVertical type, Stainless Steel and Copper
REFRIGERANT CONTROLThermostatic Expansion Valve
REFRIGERANT CHARGER-404A 11.3oz (320g)
DESIGN PRESSUREHigh 450PSIG, Low 210PSIG
P.C. BOARD CIRCUIT PROTECTIONHigh/Low Voltage Cut-out ( Internal )
COMPRESSOR PROTECTIONAuto-reset Overload Protector ( Internal )
REFRIGERANT CIRCUIT PROTECTIONAuto-reset High Pressure Control Switch
LOW WATER PROTECTIONFloat Switch
ACCESSORIES -SUPPLIEDIce Scoop, 6" Adjustable Leg(4pcs.)
-REQUIREDN/A
OPERATING CONDITIONSVOLTAGE RANGE104 - 127 V
AMBIENT TEMP.45 -100° F
WATER SUPPLY TEMP.45 - 90° F
AC SUPPLY VOLTAGE115/60/1
AMPERAGE8.4 A ( 5 Min. Freeze AT 104°F / WT 80°F)
MINIMUM CIRCUIT AMPACITY15 A
MAXIMUM FUSE SIZE15 A
APPROXIMATE ICE PRODUCTIONAmbientWATER TEMP. (°F)
PER 24 HR.Temp.(°F)507090
lbs./day ( kg/day )70*295 (134)270 (123)251 (114)
Reference without *marks80276 (125)237 (108)227 (103)
90270 (123)*210 (95)196 (89)
SHAPE OF ICECrescent Cube
ICE PRODUCTION PER CYCLE5.0 lbs. (2.26kg) 238 pcs.
APPROXIMATE STORAGE CAPACITY100 lbs. (45kg)
ELECTRIC & WATER CONSUMPTION90/70°F70/50°F
ELECTRIC W (kWH/100 lbs.)610(7.02)610(4.99)
WATER gal./24HR (gal./100 lbs.)46(22.0)58(19.8)
ENERGY STAR 3.0No
EXTERIOR DIMENSIONS30" x 28" x 39" (762 x 712 x 990 mm)
(WxDxH)Including 6" Adjustable legs
EXTERIOR FINISHStainless Steel, Galvanized Steel (Rear)
WEIGHTNet 154 lbs. (70 kg), Shipping 187 lbs. (85 kg)
CONNECTIONS - ELECTRICCord Connection
- WATER SUPPLYInlet 1/2" FPT
- DRAINOutlet 3/4" FPT
CUBE CONTROL SYSTEMFloat Switch
HARVESTING CONTROL SYSTEMHot Gas and Water, Thermistor and Timer
ICE MAKING WATER CONTROLTimer Controlled. Overflow Pipe
COOLING WATER CONTROLN/A
BIN CONTROL SYSTEMMechanical Level Switch with Delay
COMPRESSORHermetic, Model SC10CL
CONDENSERAir-Cooled, Fin and tube type
EVAPORATORVertical type, Stainless Steel and Copper
REFRIGERANT CONTROLThermostatic Expansion Valve
REFRIGERANT CHARGER-404A 13.4oz (380g)
DESIGN PRESSUREHigh 450PSIG, Low 210PSIG
P.C. BOARD CIRCUIT PROTECTIONHigh/Low Voltage Cut-out ( Internal )
COMPRESSOR PROTECTIONAuto-reset Overload Protector ( Internal )
REFRIGERANT CIRCUIT PROTECTIONAuto-reset High Pressure Control Switch
LOW WATER PROTECTIONFloat Switch
ACCESSORIES -SUPPLIEDIce Scoop, 6" Adjustable Leg(4pcs.)
-REQUIREDN/A
OPERATING CONDITIONSVOLTAGE RANGE104 - 127 V
DRAWING NO. (DIMENSION)N/A
100272 (123)207 (94)*183 (83)
AMBIENT TEMP.45 -100° F
WATER SUPPLY TEMP.45 - 90° F
AC SUPPLY VOLTAGE115/60/1
AMPERAGE5.7 A ( 5 Min. Freeze AT 104°F / WT 80°F)
MINIMUM CIRCUIT AMPACITY15 A
MAXIMUM FUSE SIZE15 A
APPROXIMATE ICE PRODUCTIONAmbientWATER TEMP. (°F)
PER 24 HR.Temp.(°F)507090
lbs./day ( kg/day )70*265 (120)255 (116)241 (109)
Reference without *marks80257 (117)241 (109)227 (103)
90255 (116)*230 (104)215 (98)
100252 (114)227 (103)*202 (92)
SHAPE OF ICECrescent Cube
ICE PRODUCTION PER CYCLE5.0 lbs. (2.26kg) 238 pcs.
APPROXIMATE STORAGE CAPACITY100 lbs. (45kg)
ELECTRIC & WATER CONSUMPTION90/70°F70/50°F
ELECTRIC W (kWH/100 lbs.)470(4.90)460(4.16)
POT. WATER gal./24HR (gal./100 lbs.)46(20.0)48(18.3)
COND. WATER gal./24HR (gal./100 lbs.)219(95.4)93(35.2)
ENERGY STAR 3.0N/A
EXTERIOR DIMENSIONS30" x 28" x 39" (762 x 712 x 990 mm)
(WxDxH)Including 6" Adjustable legs
EXTERIOR FINISHStainless Steel, Galvanized Steel (Rear)
WEIGHTNet 154 lbs. (70 kg), Shipping 187 lbs. (85 kg)
CONNECTIONS - ELECTRICCord Connection
- WATER SUPPLYInlet 1/2" FPT
- DRAINOutlet 3/4" FPT
CONDENSER WATER Inlet 1/2" FPT
Outlet 1/2" FPT
CUBE CONTROL SYSTEMFloat Switch
HARVESTING CONTROL SYSTEMHot Gas and Water, Thermistor and Timer
ICE MAKING WATER CONTROLTimer Controlled. Overflow Pipe
COOLING WATER CONTROLPressure Regulator
BIN CONTROL SYSTEMMechanical Level Switch with Delay
COMPRESSORHermetic, Model NF7CLX
CONDENSERWater-Cooled, Tube type
EVAPORATORVertical type, Stainless Steel and Copper
REFRIGERANT CONTROLThermostatic Expansion Valve
REFRIGERANT CHARGER-404A 12.3oz (350g)
DESIGN PRESSUREHigh 450PSIG, Low 210PSIG
P.C. BOARD CIRCUIT PROTECTIONHigh/Low Voltage Cut-out ( Internal )
COMPRESSOR PROTECTIONAuto-reset Overload Protector ( Internal )
REFRIGERANT CIRCUIT PROTECTIONAuto-reset High Pressure Control Switch
LOW WATER PROTECTIONFloat Switch
ACCESSORIES -SUPPLIEDIce Scoop, 6" Adjustable Leg(4pcs.)
-REQUIREDN/A
OPERATING CONDITIONSVOLTAGE RANGE104 - 127 V
AMBIENT TEMP.45 -100° F
WATER SUPPLY TEMP.45 - 90° F
WATER SUPPLY PRESSURE10 - 113 PSIG
DRAWING NO. (DIMENSION)N/A
52
PERFORMANCE DATAISSUED:06/02/2017
ITEM: HOSHIZAKI CRESCENT CUBER
MODEL: KM-230BAJ
B. Performance Data
1. KM-230BAJ
APPROXIMATE ICE
PRODUCTION PER 24 HR.
lbs./day kg./day100/38209951617313059
APPROXIMATE ELECTRIC
CONSUMPTION
watts100/38
APPROXIMATE WATER
CONSUMPTION PER 24 HR.
gal./day m3/day100/38440.17370.14330.12
FREEZING CYCLE TIME