Reliability is a
4
beautiful thing
TM
SELF-CONTAINED CUBER
(OPEN CELL TYPE)
Model
AM-50BAE
AM-50BAE-AD
SERVICE MANUAL
NUMBER:
ISSUED:
73126
December 22, 200
IMPORTANT
Only qualified service technicians should attempt to service or maintain this
icemaker. No such service or maintenance should be undertaken until the
technician has thoroughly read this Service Manual.
HOSHIZAKI provides this manual primarily to assist qualified service technicians in the
service and maintenance of the icemaker.
Should the reader have any questions or concerns which have not been satisfactorily
addressed, please call or write to the HOSHIZAKI Technical Support Department for
assistance.
HOSHIZAKI AMERICA, INC.
618 Highway 74 South
Peachtree City, GA 30269
Attn: HOSHIZAKI Technical Support Department
Phone: 1-800-233-1940 Technical Service
(770) 487-2331
Fax: (770) 487-3360
NOTE: To expedite assistance, all correspondence/communication MUST include the following
information:
• Model Number
• Serial Number
• Complete and detailed explanation of the problem
2
U1VA6060209
Please review this manual. It should be read carefully before the icemaker is serviced or
maintenance operations performed. Only qualified service technicians should service and
maintain the icemaker. This manual should be made available to the technician prior to
service or maintenance.
CONTENTS
I. Specifications .................................................................................................................... 5
1. Dimensions/Connections ............................................................................................. 5
[a] AM-50BAE ............................................................................................................ 5
[b] AM-50BAE-AD ...................................................................................................... 6
2. Specifications ...............................................................................................................7
[a] AM-50BAE ............................................................................................................ 7
[b] AM-50BAE-AD ...................................................................................................... 8
II. General Information .......................................................................................................... 9
1. Construction .................................................................................................................9
2. Icemaking Compartment ............................................................................................ 10
III. Installation and Operating Instructions ........................................................................... 11
1. Checks Before Installation .......................................................................................... 11
2. Location ...................................................................................................................... 11
3. Setup .......................................................................................................................... 12
Built-In Installation .................................................................................................... 12
Reversing the Door Hinges ...................................................................................... 14
4. Electrical Connections................................................................................................ 16
5. Water Supply and Drain Connections ......................................................................... 17
6. Final Check List.......................................................................................................... 18
7. Startup ........................................................................................................................ 18
8. Preparing the Icemaker for Long Storage ................................................................... 19
IV. Cleaning and Maintenance............................................................................................ 20
1. Cleaning and Sanitizing Instructions .......................................................................... 20
[a] Cleaning Solution ................................................................................................ 20
[b] Cleaning Procedure ............................................................................................ 21
[c] Sanitizing Solution............................................................................................... 22
[d] Sanitizing Procedure ........................................................................................... 22
2. Maintenance ............................................................................................................... 27
3. Water Valve ................................................................................................................. 27
V. Technical Information ...................................................................................................... 28
1. Water Circuit and Refrigerant Circuit........................................................................... 28
2. Wiring Diagram ........................................................................................................... 29
3. Controls ...................................................................................................................... 30
[a] Icemaking Control ............................................................................................... 30
[b] Defrost Control .................................................................................................... 30
[c] No Adjustment Required ..................................................................................... 30
[d] Before Checking the Electronic Controller........................................................... 31
[e] Adjustment at Part Replacement ......................................................................... 32
U1VA6060209
3
4. Timing Chart ............................................................................................................... 33
5. Performance Data ....................................................................................................... 34
[a] AM-50BAE .......................................................................................................... 34
[b] AM-50BAE-AD .................................................................................................... 35
VI. Service Diagnosis ......................................................................................................... 36
VII. Removal and Replacement of Components ................................................................. 39
1. Service for Refrigerant Lines ...................................................................................... 39
[a] Service Information .............................................................................................. 39
[b] Refrigerant Recovery........................................................................................... 40
[c] Evacuation and Recharge ................................................................................... 41
2. Compressor ................................................................................................................ 42
3. Drier............................................................................................................................ 43
4. Evaporator .................................................................................................................. 44
5. Hot Gas Valve ............................................................................................................. 45
6. Pump Motor ................................................................................................................ 46
7. Fan Motor ................................................................................................................... 46
8. Water Valve ................................................................................................................. 47
9. Controller Board ......................................................................................................... 47
10. Thermistor for Cube Control ..................................................................................... 48
11. Bin Control Thermostat ............................................................................................. 49
4
U1VA6060209
I. Specifications
1. Dimensions/Connections
[a] AM-50BAE
Units = mm
U1VA6060209
5
[b] AM-50BAE-AD
Units = mm
6
U1VA6060209
2. Specifications
[a] AM-50BAE
U1VA6060209
7
G
[b] AM-50BAE-AD
AC SUPPLY VOLTAGE 115/60/1
AMPERAGE 3.4 A (5 Min. Freeze AT 104°F / WT 80°F)
MINIMUM CIRCUIT AMPACITY 15 A
MAXIMUM FUSE SIZE 15 A
APPROXIMATE ICE PRODUCTION Ambient WATER TEMP. (°F)
PER 24 HR. Temp.(°F) 50 70 90
lbs./day ( kg/day ) 70 *55 (25) 49 (22) 46 (21)
Reference without *marks 80 50 (23) 41 (19) 41 (19)
90 49 (22) *34 (15) 33 (15)
100 42 (19) 34 (15) 32 (15)
SHAPE OF ICE Column
ICE PRODUCTION PER CYCLE 0.65 lbs. (0.29 kg) 24 pcs.
APPROXIMATE STORAGE CAPACITY 27 lbs. (12.5 kg) [Bin Control Setting 22 lbs. (10.0 kg)]
ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F
ELECTRIC W (kWH/100 lbs.) 238 (16.8) 227 (9.9)
WATER gal./24HR (gal./100 lbs.) 22.0 (63.9) 30.0 (53.7)
EXTERIOR DIMENSIONS (WxDxH) 14.9" x 22.6" x 31.5" (378 x 575 x 800mm)
EXTERIOR FINISH Stainless steel, Galvanized Steel (Rear)
WEIGHT Net 88 lbs. ( 40 kg ), Shipping 99 lbs. (45 kg) without pallet
CONNECTIONS - ELECTRIC Cord Connection
- WATER SUPPLY Inlet 3/4" BSP
- DRAIN Outlet HOSE I.D. φ15.5mm
CUBE CONTROL SYSTEM Thermistor. Timer
HARVESTING CONTROL SYSTEM Hot gas. Thermistor
ICE MAKING WATER CONTROL Thermistor. Timer
COOLING WATER CONTROL N/A
BIN CONTROL SYSTEM Thermos tat
COMPRESSOR Hermetic, Model QA51K13GAU6
CONDENSER
EVAPORATOR Tin-plated copper tube on sheet and cups
REFRIGERANT CONTROL Capillary Tube
REFRIGERANT CHARGE R134a 4.2 oz. (120 g)
DESIGN PRESSURE High 240 PSIG, Low 120 PSIG
P. C. B OARD CIRCUIT PROTECTION N/A
COMPRESSOR PROTECTION Auto-reset Overload Protector
ICE MAKER PROTECTION N/A
ACCESSORIES - SUPPLIED Ice Scoop; 3/8" male flare Water Inlet fitting
- REQUIRED N/A
OPERATING CONDITIONS VOLTAGE RANGE 104 - 127 V
AGENCY UL OUTDOOR APPROVED, cUL
Air-cooled, Fin and tube type
AMBIENT TEMP. 45 - 100° F
WATER SUPPLY TEMP. 45 - 95° F
WATER SUPPLY PRESSURE 7 - 113 PSI
NSF
20 x H27mm
φ
We reserve the right to make changes in specifications and design without prior notice.
8
U1VA6060209
II. General Information
1. Construction
Top Panel
Ice Making
Mechanism
Scoop Holder
Front Panel
Control Switch
Louver
Bin Control
Thermostat
Slope
Magnet Catch
Door
U1VA6060209
9
2. Icemaking Compartment
Bracket
Separator
Evaporator
Ice Chute
Pump Motor
Hose Joint
Nozzle
Water Tank
10
U1VA6060209
III. Installation and Operating Instructions
1. Checks Before Installation
* Visually inspect the exterior of the shipping container and report any severe damage to
the carrier.
WARNING
Remove shipping tape(s) and packing as follows. If any are left in the
icemaker, it will not work properly.
IMPORTANT
1. Remove shipping tape holding the door.
2. Ensure all components, fasteners and thumbscrews are securely in place.
* Remove the package containing accessories. Remove shipping tape holding the separator.
* Check that refrigerant lines do not rub or touch lines or other surfaces.
* Check that the compressor is snug on all mounting pads.
* See the nameplate on the upper right part of the left side panel, and check that your voltage
supplied corresponds with the voltage specified on the nameplate.
2. Location
WARNING
Normal operating ambient temperature should be within 45°F (7°C) to 100°F
(38°C); Normal operating water temperature should be within 45°F (7°C) to
95°F (35°C). Operation of the icemaker, for extended periods, outside of
these normal temperature ranges may affect production capacity.
For best operating results:
* The icemaker should not be located next to ovens, grills or other high heat producing
equipment.
* The location should provide a firm foundation for the equipment. Level the icemaker from
side to side and front to rear.
* Avoid a site where dripping is not allowed.
* This icemaker will not work at subfreezing temperatures. To prevent damage to the water
supply line, drain the icemaker when air temperature is below freezing.
* This icemaker requires no clearance on either side. But allow enough space at rear for
water supply and drain connections and at least 15" (approx. 38 cm) clearance at front.
U1VA6060209
11
3. Setup
1) Unpack the icemaker, and remove all shipping cartons, tapes and packing BEFORE
operating the unit. Be careful not to damage the exterior panels when handling the
icemaker.
2) Position the icemaker in a selected site. Clean the interior with soap and water and rinse
thoroughly.
3) Level the icemaker in both the left-to-right and the front-to-rear directions.
4) The perimeter where the machine touches the floor should be sealed with silicone for
sanitation.
Built-In Installation
[a] Checking the Installation Site
Ensure a 15" (381 mm) wide space for building in the icemaker.
1) To build in between two units:
Min. 34"
15"
AM-50BAE
2) To build in between a unit and a wall or a
tall unit:
Secure
Fig. 2
Secure the counter to the wall with a bracket
or the like. Ensure a 15" (381 mm) wide, min.
34" (864 mm) high space for the icemaker.
Min. 32"
15"
AM-50BAE-AD
Fig. 1
For the AM-50BAE-AD ensure a min. 32"
(814 mm) high space for the icemaker.
IMPORTANT
Do not let the weight of the counter rest
12
on the icemaker.
U1VA6060209
3) To build in between a unit and an open
space:
Cabinet
4) To build into a corner:
Min. 23"
Min. 34"
15"
AM-50BAE
Cabinet
Min. 32"
15"
AM-50BAE-AD
Fig. 3
Use a cabinet or the like to support the counter
before building in the icemaker.
Oven
Icemaker
Fig. 4
Do not build in the icemaker in a corner where
the door will hit other equipment such as an
oven handle or where the icemaker cannot
be pulled out for service.
U1VA6060209
[b] Building in the Icemaker
1) Make water supply and drain connections.
2) Plug in the icemaker.
3) Build in the icemaker:
Slowly push the lower part of the icemaker into place. Beware of adjacent equipment.
IMPORTANT
While building in the icemaker, do not damage the water supply and drain
connections or the power cord.
13
Reversing the Door Hinges
1) Right-hinged door.
2) a. Remove the hinge stop pin from hinge (B).
b. Remove the door from hinge (A).
3) c. Remove the two screws securing the top
panel.
d. Remove hinge (A) and brace - top.
e. Remove hinge (B).
Body
Brace - Top
Hinge Stop Pin
d
b
a
Top Panel
d
c
Hinge (A)
Door
Hinge (B)
Hinge (A)
14
Hinge (B)
e
U1VA6060209
4) f. Remove hinge (A) and brace - top from
the body. Attach brace - top to body
(right). Flip hinge (A) over as shown in
the illustration below, and fasten to body
(left).
g. Turn the top panel 180°, hook its rear on
the body, and secure its front with screws.
h. Attach hinge (B) on the left.
Hinge (A)
Top Panel
g
f
Brace - Top
f - detail
Slot
Hinge (A)
Body (Left) Body (Right)
5) i. Remove the handle from the front left and
reattach it to the front right of the door.
Hinge (A)
Hinge (B)
Front Front
Handle Handle
h
i
U1VA6060209
6) j. Insert the door into hinge (A).
k. Screw the hinge stop pin into hinge (B)
until it is tight.
15
Door
Hinge (A)
Door
j
Body
k
Hinge (B)
Hinge Stop Pin
7) Left-hinged door.
4. Electrical Connections
THIS APPLIANCE MUST BE GROUNDED.
This icemaker requires a ground that meets national and local electrical
code requirements. To prevent possible severe electrical shock injury to
individuals or extensive damage to equipment, install a proper ground wire
to this icemaker. Remove the plug from the mains socket before any
maintenance, repairs or cleaning is undertaken.
WARNING
* This icemaker must be plugged into a separated power receptacle which has enough
capacity. The maximum allowable voltage variation should not exceed ±10 percent of the
nameplate rating. See the nameplate.
* Usually an electrical permit and services of a licensed electrician are required.
16
U1VA6060209
5. Water Supply and Drain Connections
WARNING
To prevent damage to the freezer mechanism, do not operate this icemaker
when the water supply is OFF, or if the pressure is below the recommended
minimum water pressure of 10 PSIG (0.7 bar). Stop the icemaker until
proper water pressure is resumed.
* Attach the brass fitting included in the accessory bag as shown in Fig. 5. The brass fitting
size is 1/2" FPT and must be connected only to a potable water supply.
* A water supply line shut-off valve and drain valve must be installed.
* Water supply pressure should be a minimum of 10 PSIG (0.7 bar) and a maximum of 113
PSIG (7.5 bar). If the pressure exceeds 113 PSIG (7.5 bar), use a pressure reducing valve.
* Drain outlet hose is 5/8" (16 mm) ID and internally connected to a 2/3" (17 mm) OD drain
outlet.
* For gravity drain installation, drain must be 1/4" fall per foot (2 cm fall per meter) on horizontal
runs to get good flow.
* Keep a more than 2 vertical inch
(5 vertical cm) air gap between
the drain pipe end and the drain.
* The drain pipe must be so laid as to prevent
a backflow into the storage bin.
* For condensate pump installation for exiting
drain, refer to condensate pump instruction
manual.
* A plumbing permit and services of a licensed
Icemaker
Water Supply Inlet
3/4" BSP Threads
Attach brass fitting to
Water Supply Inlet.
Fitting size is a 1/2" FPT
Shut-off Valve
plumber may be required in some areas.
* This icemaker should be installed in
accordance with applicable national, state
and local regulations.
Bin Drain Outlet
Hose 5/8" ID
1/4" fall per foot
Drain Valve
U1VA6060209
Fig. 5
To approved floor drain
17
6. Final Check List
1) Is the icemaker level?
2) Is the icemaker in a site where the ambient temperature is within 45°F (7°C) to 100°F
(38°C) and the water temperature within 45°F (7°C) to 95°F (35°C) all year around?
3) Have all shipping tape(s), string and packing been removed from the icemaker?
4) Are all components, fasteners and thumbscrews securely in place?
5) Have all electrical and piping connections been made?
6) Has the power supply voltage been tested or checked against the nameplate rating?
Has a proper ground been installed to the icemaker?
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 10 PSIG (0.7 bar) and a maximum of
113 PSIG (7.5 bar)?
8) Have the compressor hold-down bolts and all refrigerant lines been checked against
vibration and possible failure?
9) Has the bin control thermostat been checked for correct operation?
10) Has the 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 user been given the name and telephone number of an authorized service agent?
7. Startup
* Check that shipping tape(s), string and packing are removed before starting the icemaker.
1) Clean inside the storage bin and door.
2) Open the water supply line shut-off valve and plug in the icemaker.
3) Move the control switch to the “ICE" position.
* The freezing cycle will start automatically.
18
U1VA6060209
8. Preparing the Icemaker for Long Storage
WARNING
Drain the icemaker to prevent damage to the water supply line at
subfreezing temperatures, using air or carbon dioxide. Shut off the icemaker
until proper air temperature is resumed.
1) Close the water supply line shut-off valve, and open the drain valve.
2) Move the control switch to the “OFF" position.
3) Blow out the water supply line and the internal water circuit.
Note: This procedure is necessary to protect the icemaker from freezing up at subfreezing
temperatures.
4) Unplug the icemaker.
5) Remove all ice from the storage bin, and clean the bin.
6) Close the drain valve.
Icemaker
Shut-off Valve
Drain Valve
Air or CO2
U1VA6060209
Fig. 6
19
IV. Cleaning and Maintenance
1. Ensure all components, fasteners and thumbscrews are securely in place
after any maintenance or cleaning is done to the equipment.
2. Wash your hands before removing ice. Use the scoop provided to remove
ice.
3. Keep the scoop clean. Clean it by using a neutral cleaner at least once a
day, and rinse thoroughly.
4. Close the bin door after removing ice to prevent entrance of dirt, dust or
insects into the bin.
5. Clean the bin liner at least once a month by using a neutral cleaner. Rinse
thoroughly after cleaning.
6. The storage bin is for ice use only. Do not store anything else in the bin.
7. Keep the area around the icemaker clean. Dirt, dust or insects in the
icemaker could cause electrical damage to the equipment or harm to
individuals.
IMPORTANT
1. Cleaning and Sanitizing Instructions
WARNING
1. HOSHIZAKI recommends cleaning this unit at least once a year. More
frequent cleaning, however, may be required in some existing water
conditions.
2. To prevent injury to individuals and damage to the icemaker, do not use
ammonia type cleaners.
3. Always wear liquid-proof gloves to prevent the cleaning and sanitizing
solutions from coming into contact with skin.
[a] Cleaning Solution
Dilute 5 fl. oz. (148 ml) of recommended cleaner Hoshizaki “Scale Away" or “LIME-A-WAY"
(Economics Laboratory, Inc.) with 1 gallon (3.8 l) of warm water.
IMPORTANT
For safety and maximum effectiveness, use the solution immediately after
dilution.
20
U1VA6060209
[b] Cleaning Procedure
The cleaning process will remove lime deposits from the water system.
1) Remove all ice from the evaporator and the storage bin.
Note: To remove cubes on the evaporator, move the control switch to the “OFF" position
and move it back to the “ICE" position after 3 minutes. The defrost cycle starts and
the cubes will be removed from the evaporator.
2) Move the control switch to the “OFF" position. Close the water supply line shut-off valve.
Water Tank
3) Disconnect the suction tube by compressing
both plastic tabs to unlock the joint in the
Suction Tube
direction of the black arrows and pulling the
tube clear.
Joint Drain
4) Spread out the tabs on both sides of the water
tank to unlock it, then pull it out toward you.
Drain the tank.
Unlock Unlock
U1VA6060209
5) After draining, slide in the water tank along the
Bracket
rails at the bottom of the right and left brackets
until it clicks into place.
Lock Lock
Rail Rail
6) Refit the suction tube onto the water tank inlet
by pushing the joint to lock it securely in the
direction of the arrows. A loose fitting may
cause a water leak.
7) Slowly pour the cleaning solution into the water tank.
8) Move the control switch to the “WASH" position.
9) After circulating the cleaning solution for about 30 minutes, move the control switch to the
“OFF" position.
21
10) Remove the water tank, drain it, and replace it as described in 3) through 6).
11) Open the water supply line shut-off valve.
12) Move the control switch to the “WASH" position to circulate clean water for about
5 minutes.
13) Move the control switch to the “OFF" position, then remove the water tank, drain it, and
replace it as described in 3) through 6).
14) Repeat 12) and 13) three more times to rinse thoroughly.
[c] Sanitizing Solution
Dilute 0.5 fl. oz. (14.8 ml or 1 tbs) of 5.25% sodium hypochlorite solution (chlorine bleach)
with 1 gallon (3.8 l) of warm water. Using a chlorine test strip or other method, confirm that
you have a concentration of about 200 ppm.
IMPORTANT
For safety and maximum effectiveness, use the solution immediately after
dilution.
[d] Sanitizing Procedure
The sanitizing process will sanitize the icemaker.
1) Move the control switch to the “OFF" position.
2) Open the bin door and remove ice from the storage bin.
3) Remove the slope by bending its center carefully and releasing it from the two slope
shafts. Remove the slope from the storage bin.
4) Thoroughly clean and sanitize the storage bin,
slope, scoop and any parts normally
accessible from the storage bin.
5) Remove each separator by lifting it to the
horizontal position and pushing it hard
Separator
inward. Remove all separators in the same
way and clean and sanitize them.
22
U1VA6060209
6) Disconnect the suction tube by
compressing both plastic tabs to unlock
the joint in the direction of the black arrows
and pulling the tube clear to drain the tank.
7) Spread out the tabs on both sides to unlock
the water tank, and pull it out toward you.
Soak the water tank in the sanitizing
solution for 10 minutes.
Water Tank
Suction Tube
Joint Drain
Unlock Unlock
8) Lift off the ice chute from the front frame
pipe and then from the rear frame pipe.
Soak the ice chute in the sanitizing
solution for 10 minutes.
9) Pull the discharge tube from the spray
assembly. Remove the assembly by
pulling it toward you.
10) Remove the two caps. Soak the caps and
the spray assembly in the sanitizing
solution for 10 minutes. If the nozzles are
clogged, clean them with a wire or a
suitable brush.
Frame Pipe
Discharge
Tube
Ice Chute
Spray
Assembly
Cap
U1VA6060209
Reducing Pipe
11) Refit the two caps in their correct
positions. Make sure the reducing pipe is
in place in the center.
23
12) Slide in the spray assembly along the rails on
the right and left brackets. Refit the discharge
tube securely on the spray assembly. A loose
fitting may cause a water leak.
13) Position and lock the ice chute onto the front
and rear frame pipes by pushing the chute
down until it clicks onto both pipes.
Frame Pipe
Bracket
Rail Rail
14) Slide in the water tank along the rails at the
bottom of the right and left brackets until it
clicks into place.
15) Refit the suction tube onto the water tank inlet
by pushing the joint to lock it securely in the
direction of the arrows. A loose fitting may
cause a water leak.
16) Hook each separator onto the rail, and pull it
hard toward you until it locks in place with a
click. Refit all the separators in the same way.
Bracket
Lock Lock
Rail Rail
17) Refit the slope in its correct position.
18) Close the water supply line shut-off valve.
19) Discard the sanitizing solution.
24
U1VA6060209
20) Mix a new batch of the sanitizing solution and slowly pour it into the water tank.
21) Move the control switch to the “WASH" position.
22) After circulating the sanitizing solution for about 15 minutes, move the control switch to
the “OFF" position.
Water Tank
23) Disconnect the suction tube by compressing
both plastic tabs to unlock the joint in the
Suction Tube
direction of the black arrows and pulling the
tube clear.
Joint Drain
24) Spread out the tabs on both sides of the water
tank to unlock it, then pull it out toward you.
Unlock Unlock
Drain the tank.
25) After draining, slide in the water tank along
the rails at the bottom of the right and left
brackets until it clicks into place.
26) Refit the suction tube onto the water tank inlet
by pushing the joint to lock it securely in the
direction of the arrows. A loose fitting may
cause a water leak.
27) Repeat 20) through 26) one time.
28) Open the water supply line shut-off valve.
Bracket
Lock Lock
Rail Rail
U1VA6060209
25
29) Move the control switch to the “WASH" position to circulate clean water for about
5 minutes.
30) Move the control switch to the “OFF" position, then remove the water tank, drain it, and
replace it as described in 23) through 26).
31) Repeat 29) and 30) two more times to rinse thoroughly.
32) Move the control switch to the “ICE" position, and start the automatic icemaking process.
26
U1VA6060209
2. Maintenance
IMPORTANT
This icemaker must be maintained individually, referring to the instruction
manual and labels provided with the icemaker.
1) Exterior
To keep the exterior clean, wipe occasionally with a clean and soft cloth. Use a damp cloth
containing a neutral cleaner to wipe off all oil or dirt build-up.
2) Condenser
Check the condenser once a year, and clean if required by using a brush or vacuum cleaner.
More frequent cleaning may be required depending on the location of the icemaker.
3. Water Valve
1) Unplug the icemaker or disconnect the power source.
2) Close the water supply shut-off valve.
3) Remove the door and top panel.
4) Disconnect the water supply inlet from the water valve.
5) Remove the mesh filter from the water valve.
6) Clean the mesh using a brush.
7) Refit the mesh and water supply inlet in their correct positions.
8) Open the water supply shut-off valve.
9) Plug in the icemaker or connect
the power source.
10) Check for leaks.
11) Refit the panels in their correct positions.
Coil
Do not remove
Filter
U1VA6060209
27
Fig. 7
V. Technical Information
1. Water Circuit and Refrigerant Circuit
Capillary Tube
Accumulator
Water Inlet
Pump
Motor
Evaporator
Water Tank
Bin
Ice Chute
Spray Assembly
Controller
Board
Condenser
Drier
Insulation
Insulation
Hot Gas
Valve
Compressor
Fan
28
Water Circuit
Refrigeration Circuit
U1VA6060209
2. Wiring Diagram
U1VA6060209
29
3. Controls
[a] Icemaking Control
The freeze and defrost cycles are controlled by the combination of a thermistor and an electronic
controller.
When the evaporator cools down to a specific temperature (around +28°F (-2°C)), the
thermistor attached to the evaporator senses the temperature and signals to the electronic
controller. After the built-in timer counts 10 minutes from the signal input, the controller switches
the contact of the built-in relays (X1 and X2) to stop the pump motor and fan motor and to
open the hot gas valve and water valve. This completes the freeze cycle and starts the defrost
cycle.
[b] Defrost Control
The ice cubes formed inside the icemaking cells are released by hot gas warming the
evaporator. When a small portion of the ice melts on the icemaking cell interior, the ice drops
by its own weight and slides down the ice guide into the storage bin. When the evaporator is
warmed further (to around +45°F (+7°C)), the thermistor senses the temperature rise and
signals to the electronic controller. After the built-in timer counts 50 seconds from the signal
input, the controller switches the contact of the built-in relays to start the pump motor and fan
motor and to close the hot gas valve and water valve. This completes the defrost cycle and
starts the freeze cycle.
At low temperature conditions where the defrost cycle exceeds 3 minutes, the water valve will
close after 3 minutes.
In the initial cycle at startup or after shutdown for bin control, water is supplied for 80 seconds.
This means the water valve closes (approx. 30 seconds) after the freeze cycle starts.
[c] No Adjustment Required
The thermistor and electronic controller are factory adjusted to produce constant ice all the
year around, not affected by changes in the ambient and water temperatures.
No adjustment is required for any frequency 50/60Hz or ambient temperature.
30
U1VA6060209
[d] Before Checking the Electronic Controller
Check the power source voltage and the thermistor as shown in the table below.
Component Procedure Normal
Thermistor
(on evaporator)
Holder
Thermistor
Screw
Evaporator
Thermistor sensor part is fragile,
glass sealed. Handle with care.
* Disconnect the thermistor on the
board.
* Remove the screw and the
thermistor holder on the evaporator.
* Immerse the sensor part in a glass
containing ice and water for 5
minutes.
* Check the resistance between
terminals of the thermistor.
* Replace the thermistor in its correct
position.
*
Connect the thermistor.
CAUTION
5.5 - 6.5 kΩ
U1VA6060209
31
[e] Adjustment at Part Replacement
The thermistor and electronic controller are designed for optimum ice production. If adjustment
is desired at part replacement, follow the instructions below.
Electronic Controller
Variable resistor for
adjustment of freeze cycle
Fig. 8
Variable resistor for
adjustment of defrost cycle
completion temperature
(Does not need adjustment)
completion temperature
The variable resistor VR1 is for a fine adjustment of the defrost cycle completion temperature.
It needs no adjustment at part replacement.
The variable resistor VR2 is for a fine adjustment of the freeze cycle completion temperature.
Turn VR2 clockwise for a higher temperature (WARM), i.e. ice cubes with larger diameter
holes and counterclockwise for a lower temperature (COLD), i.e. ice cubes with smaller
diameter holes.
Note: Do not adjust VR2 to the lowest temperature. It will cause excessive ice production
resulting in defrost failure.
32
U1VA6060209
4. Timing Chart
U1VA6060209
33
5. Performance Data
[a] AM-50BAE
34
U1VA6060209
[b] AM-50BAE-AD
APPROXIMATE ICE
PRODUCTION PER 24 HR.
lbs./day kg./day
APPROXIMATE ELECTRIC
CONSUMPTION
watts
APPROXIMATE W ATER
CONSUMPTION PER 24 HR.
gal./day m3/day
FREEZING CYCLE TIME
min.
HARVEST CYCLE TIME
min.
HEA D PRE SSURE
PSIG kg/cm2G
SUCTION PRESSURE
PSIG kg/cm2G
AMBIENT TEMP.
(ºF/ºC)
70/21
80/27
90/32
100/38
70/21
80/27
90/32
100/38
70/21
80/27
90/32
100/38
70/21
80/27
90/32
100/38
70/21
80/27
90/32
100/38
70/21
80/27
90/32
100/38
70/21
80/27
90/32
100/38
W ATER TEM P . (º F/º C)
50/10 70/21 90/32
55
25
49 22 46 21
50 23 41 19 41 19
49 22
34
15
33 15
42 19 34 15 32 15
30
227
229
230
236
0.11
230
234
238
240
27 0.10 24 0.09
237
243
246
253
28 0.11 24 0.09 22 0.08
27 0.10
22
0.08
19 0.08
24 0.09 21 0.08 17 0.06
145
15
16
17
20
2.5
2.5
2
2
10.2
17
19
21
22
2.5
2
2
2
161 11.3 182 12.8
20
23
25
29
2.5
2
2
2
157 11.0 182 12.8 202 14.2
161 11.3
200
14.1
221 15.5
165 11.6 205 14.4 240 16.9
18
1.3
22 1.5 25 1.8
21 1.5 26 1.8 28 2.0
22 1.5
30
22 1.5 31 2.2
2.1
33 2.3
35
2.5
U1VA6060209
TOTAL HEAT OF REJECTION FROM CONDENSER
Note: Pressure data is recorded at 5 minutes into freezing cycle.
The data not in
should be used for reference only.
bold
1850 BTU/h [AT 90ºF (32ºC) / WT 70ºF (21ºC)]
We reserve the right to make changes in specifications and design without prior notice.
35
VI. Service Diagnosis
PROBLEM CHECK POSSIBLE CAUSE REMEDY
[1] The icemaker will not
start
[2] Compress or will not start a) Compressor 1. Wiring to compressor 1. Check for loose
[3] Fan motor or pump
motor will not run
[4] Defrost cycle time is too
long
[5] Hot gas valve will not
open
a) Power Cord 1. Loose connec tions 1. Tighten
2. Open circuit-damaged 2. Repair or replace
b) Power Switch 1. "OFF" position 1. Move to "ICE" position
2. Loose c onnections 2. Tighten
3. Bad contacts 3. Check for continuity and
replace
c) Supply Voltage 1. Too low 1. Rearrange power supply
connection to get enough
capacity
2. Power supply shared with
other equipment
d) Bin Control Thermostat 1. Ambient temperature too
cool
2. Bad contacts or leaks in
bulb
e) Heater 1. Open circuit-damaged at
low ambient temperature
2. Coil winding opened 2. Check for continuity
b) Protector 1. Bad contacts 1. Check for continuity and
c) Starter 1. Bad contacts 1. Check for continuity and
a) Wiring 1. Loose c onnections or
broken wire
b) Fan Motor, Pump Motor 1. Coil winding opened 1. Replace
c) Fan Blade 1. Fan blade bound 1. Check and replace
d) Pump Motor Impeller 1. Defective or bound
impeller
e) Pump Motor Capacitor 1. Defective 1. Replace
f) Electronic Controller 1. Defective 1. Replace
a) Therm istor 1. Out of position or loose
attachment
2. Loose c onnections 2. Repair
b) Electronic Controller 1. Defective 1. Replace
a) Wiring 1. Loose c onnectors or
broken wire
b) Hot Gas Valve 1. Coil winding opened 1. Replace
2. Rearrange power supply
connection to get enough
capacity
1. Increase ambient
temperature
2. Check for continuity and
replace
2. Check for continuity and
replace
connection or open, and
replace
between terminals and
replace
replace
replace
1. Repair or replace
1. Replace and clean
1. See "VII.10. Thermistor
for Cube Control"
1. Repair or replace
36
U1VA6060209
PROBLEM CHECK POSSIBLE CAUSE REMEDY
[6] Water will not be
supplied
[7] Water continues to be
supplied in freeze cycle
[8] No water comes from
water tank
[9] All components run but
no ice is produced
[10] Large-hole c ubes
a) Water Supply 1. Cut off 1. Turn off power supply and
wait for recovery
2. Shut-off Valve or water
2. Open
tap closed
b) Water Valve 1. Filter clogged 1. See "IV.3. Water Valve"
2. Coil winding opened 2. Replace
a) Water Valve 1. Diaphragm does not
close
1. Check for water leaks
with icemaker off
b) Electronic Controller 1. Defective 1. Replace
a) Wiring to Pump Motor 1. Loose connectors or
1. Repair or replace
broken wire
b) Pump Motor 1. Coil winding opened 1. Replace
c) Pump Motor Impeller 1. Defective or bound
1. Replace and clean
impeller
d) Pump Motor Capacitor 1. Defective 1. Replace
e) Water System 1. Water leaks 1.Check connections for
water leaks and repair
2. Clogged 2. See "IV.1. Cleaning and
Sanitizing Instructions"
f) Water Supply Line 1. Water pressure too low
and water level in water tank
1. Check for recommended
pressure
too low
a) Water System 1. Water leaks 1. Check connections for
water leaks and repair
2. Clogged 2. See "IV.1. Cleaning and
Sanitizing Instructions"
b) Nozzle 1. Clogged 1. See "IV.1. Cleaning and
Sanitizing Instructions"
2. Misaligned nozzle and
2. Place in c orrect position
water tank
a) Refrigerant Circuit 1. Gas leak 1. Check with a leak
detector. Weld, vacuum and
recharge. Replace the
refrigerant drier.
2. Undercharged 2. Check for leaks and
recharge.
3. Air or moisture trapped 3. Replace drier & recharge
b) Compressor 1. Defective valve 1. Replace compressor
c) Hot Gas Valve 1. Continues to open in
1. Check and replace
freeze cycle
d) Water Valve 1. Stuck open 1. Clean or replace
a) Ambient temperature 1. Low 1. No problem. Low ambient
temperature results in ice
cubes with slightly larger
diameter holes.
b) Electronic Controller 1. Built-in timer does not
1. Replace
count 10 min
U1VA6060209
37
PROBLEM CHECK POSSIBLE CAUSE REMEDY
[11] Cloudy cubes a) Water Quality 1. High hardness or
contains impurities.
1. Install a water filter or
scale treatment
b) Nozzle 1. Clogged 1. See "IV.1. Cleaning and
Sanitizing Instructions"
2. Misaligned nozzle and
2. Place in correct position
water tank
c) Water System 1. Scaled up 1. Clean or remove scale
2. Water leaks 2.Check connections for
water leaks and repair
[12] Freeze cycle time is too
long
a) Ambient temperature 1. Too high ( freeze cycle
will be extremely long at
1. Check for recommended
ambient temperature
more than 40°C )
b) Air Inlet / Outlet ( bottom
front )
1. Blocked. Bad air
circulation greatly reduces
1. Unblock. See "III.2.
Location"
ice production capacity of
built-in condenser types.
c) Thermistor 1. Out of position or loose
attachment
1. See "VII.10. Thermistor
for Cube Control"
2. Leads short-circuit 2. See "V.3.[d] Before
Checking Electronic
Controller"
d) Refrigerant Circuit 1. Gas leak 1. Check with a leak
detector. Weld, vacuum and
recharge. Replace the
refrigerant drier.
2. Undercharged 2. Check for leaks and
recharge.
e) Fan Motor 1. See [3]
f) Condenser 1. Clogged 1. Clean
[13] Icemaker will not stop
a) Bin Control Thermostat 1. Fused contacts 1. Replace
when bin is filled with ice
[14] Abnormal ice a) Nozz le 1. Clogged 1. See "IV.1. Cleaning and
Sanitizing Instructions"
2. Misaligned nozzle and
2. Place in correct position
water tank
b) Pump Motor 1. Bearing worn out 1. Replace
c) Pump Motor Impeller
1. Defective or bound impeller
d) Compressor 1. Bearing worn out, or
1. Replace and clean
1. Replace
cylinder valve broken
2. Mounting pad out of
2. Reinstall
position
e) Refrigerant Circuit 1. Rub or touch lines or
1. Replace
other surfaces
[15] Some cells on the
evaporator form no ice
a) Nozzle 1. Clogged 1. See "IV.1. Cleaning and
Sanitizing Instructions"
2. Misaligned nozzle and
2. Place in correct position
water tank
38
U1VA6060209
VII. Removal and Replacement of Components
IMPORTANT
Ensure all components, fasteners and thumbscrews are securely in place
after the equipment is serviced.
1. Service for Refrigerant Lines
[a] Service Information
1) Allowable Compressor Opening Time and Prevention of Lubricant Mixture [R134a]
The compressor must not be opened more than 30 minutes in replacement or service. Do
not mix lubricants of different compressors even if both are charged with the same refrigerant,
except when they use the same lubricant.
2) Treatment for Refrigerant Leak [R134a]
If a refrigerant leak occurs in the low side of an ice maker, air may be drawn in. Even if the low
side pressure is higher than the atmospheric pressure in normal operation, a continuous
refrigerant leak will eventually reduce the low side pressure below the atmospheric pressure
and will cause air suction. Air contains a large amount of moisture, and ester oil easily absorbs
a lot of moisture. If an icemaker charged with R134a has possibly drawn in air, the drier must
be replaced. Be sure to use a drier designed for R134a.
3) Handling of Handy Flux [R134a]
Repair of the refrigerant circuit requires brazing. It is no problem to use the same handy flux
that is used for the current refrigerants. However, its entrance into the refrigerant circuit should
be avoided as much as possible.
4) Oil for Processing of Copper Tubing [R134a]
When processing the copper tubing for service, wipe off oil, if any used, by using alcohol or
the like. Do not use too much oil or let it into the tubing, as wax contained in the oil will clog the
capillary tubing.
5) Service Parts for R134a
Some parts used for refrigerants other than R134a are similar to those for R134a. But never
use any parts unless they are specified for R134a because their endurance against the
refrigerant have not been evaluated. Also, for R134a, do not use any parts that have been
used for other refrigerants. Otherwise, wax and chlorine remaining on the parts may adversely
affect R134a.
U1VA6060209
39
6) Replacement Copper Tubing [R134a]
The copper tubes currently in use are suitable for R134a. But do not use them if oily inside.
The residual oil in copper tubes should be as little as possible. (Low residual oil type copper
tubes are used in the shipped units.)
7) Evacuation, Vacuum Pump and Refrigerant Charge [R134a]
Never allow the oil in the vacuum pump to flow backward. 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 R134a.
8) Refrigerant Leak Check
Refrigerant leaks can be detected by charging the unit with a little refrigerant, raising the
pressure with nitrogen and using an electronic detector. Do not use air or oxygen instead of
nitrogen for this purpose, or rise in pressure as well as in temperature may cause R134a to
suddenly react with oxygen and explode. Be sure to use nitrogen to prevent explosion.
[b] Refrigerant Recovery
The refrigerant must be recovered if required by an applicable law. No refrigerant access
valve is provided in the unit. Install a proper access valve on the low-side line (ex. compressor
process pipe). Recover the refrigerant from the access valve, and store it in a proper container.
Do not discharge the refrigerant into the atmosphere.
When replacing the drier, take the opportunity to also fit a high-side access valve for ease of
charging liquid refrigerant.
40
U1VA6060209
[c] Evacuation and Recharge
1) Attach charging hoses, a service manifold and a vacuum pump to the system. If possible,
use quick release connectors onto the access valves (especially on the high side).
2) Turn on the vacuum pump.
3) Allow the vacuum pump to pull down to a 29.9” Hg (760 mm Hg) vacuum. Evacuating
period depends on the pump capacity.
4) Close the low-side and high-side valves on the service manifold.
5) Disconnect the vacuum pump, and attach a refrigerant charging cylinder to accurately
weigh in the liquid charge. Remember to purge any air from the charging hose. See the
nameplate for the required refrigerant charge.
6) Open the high-side valve on the gauge manifold, and accurately measure in the liquid
charge. Close the valve on the charging cylinder before closing the high-side manifold
valve. Any remaining liquid in the line can be charged into the low side.
Note: Always charge in the liquid stage, as many refrigerants are blends and vapor
charging will affect the blend consistency (eg. R404A).
7) Turn on the icemaker. Release the high-side access connector, and allow pressure in the
charging line to slowly enter the low side of the system. Cap off the high-side access
valve. When pressure reduces on the low side, disconnect the low side charging line and
cap off the access valve.
8) Always cap the access valves to prevent a refrigerant leak.
9) Always thoroughly leak test all joints and valve caps.
10) Avoid charging large quantities of liquid into the low side in case of damage to the
compressor.
Depressed
Cap
Access Valve
U1VA6060209
OPEN
Fig. 9
41
2. Compressor
1) Unplug the icemaker or disconnect the power source.
2) Remove the rear panel, louver and front panel.
3) Recover the refrigerant and store it in a proper container, if required by an applicable law
(See “1. [b] Refrigerant Recovery”).
4) Remove the terminal cover on the compressor, and disconnect solderless terminals.
5) Disconnect the discharge and suction pipes using brazing equipment.
6) Remove the hold-down bolts, washers and rubber grommets.
7) Slide and remove the compressor. Unpack the new compressor package.
8) Attach the rubber grommets of the previous compressor.
9) Clean the suction and discharge pipes with an abrasive cloth/paper.
10) Place the compressor in position, and secure it using the bolts and washers.
11) Remove plugs from the compressor suction and discharge pipes.
12) Braze or solder the access, suction and discharge lines (Do not change this order), with
nitrogen gas flowing at a pressure of 3 to 4 psig (.21 to .28 bar).
13) Install the new drier (See “3. Drier”).
14) Check for leaks using nitrogen gas at 140 psig (9.65 bar) and soap bubbles.
15) Evacuate the system and charge it with refrigerant (See “1.[c] Evacuation and Recharge”).
16) Connect the solderless terminals and replace the terminal cover in its correct position.
17) Refit the panels in their correct positions.
18) Plug in the icemaker or connect the power source.
Note: Hoshizaki recommends that compressor starting components are always replaced at
the same time as the compressor.
42
U1VA6060209
3. Drier
1) Unplug the icemaker or disconnect the power source.
2) Remove the rear panel, louver and front panel.
3) Recover the refrigerant and store it in a proper container, if required by an applicable law
(See “1.[b] Refrigerant Recovery”).
4) Remove the drier holder, if any, and pull the drier towards you for easy service.
5) Remove the drier using brazing equipment.
6) Braze or solder the new drier, with the arrow on the drier in the direction of the refrigerant
flow. Use nitrogen gas flowing at a pressure of 3 to 4 psig (.21 to .28 bar) when brazing
tubings. Braze in an access valve using a tee if necessary.
7) Check for leaks using nitrogen gas at 140 psig (9.65 bar) and soap bubbles.
8) Evacuate the system and charge it with refrigerant (See “1.[c] Evacuation and Recharge”).
9) Refit the panels in their correct positions.
10) Plug in the icemaker or connect the power source.
Note: Always use a drier of the correct capacity and refrigerant type.
U1VA6060209
43
4. Evaporator
IMPORTANT
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.
1) Unplug the icemaker or disconnect the power source.
2) Remove the rear panel, door, louver, top and front panels.
3) Recover the refrigerant and store it in a proper container, if required by an applicable law
(See “1.[b] Refrigerant Recovery”).
4) Remove the water tank assembly, referring to “IV.1. Cleaning and Sanitizing Instructions.”
5) Remove the thermistor holder and thermistor from the evaporator.
6) Disconnect the solder connections on the evaporator using brazing equipment. Protect
the surrounding components from heat damage.
7) Remove the four screws holding the evaporator.
8) Install the new evaporator, and secure it with the four original screws.
9) Remove and replace the drier (See “3. Drier”).
10) Braze pipes, with nitrogen gas flowing at a pressure of 3 to 4 psig (.21 to .28 bar).
11) Check for leaks using nitrogen gas at 140 psig (9.65 bar) and soap bubbles.
12) Refit the thermistor (See “10. Thermistor for Cube Control”).
13) Evacuate the system and charge it with refrigerant (See “1.[c] Evacuation and Recharge”).
14) Refit the panels in their correct positions.
15) Plug in the icemaker or connect the power source.
44
U1VA6060209
5. Hot Gas Valve
IMPORTANT
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.
1) Unplug the icemaker or disconnect the power source.
2) Remove the rear panel, louver and front panel.
3) Recover the refrigerant and store it in a proper container, if required by an applicable law
(See “1.[b] Refrigerant Recovery”).
4) Disconnect the hot gas valve leads.
5) Remove the screw and the solenoid coil.
6) Remove the valve and drier using brazing equipment.
7) Braze the new hot gas valve with nitrogen gas flowing at a pressure of 3 to 4 psig
(.21 to .28 bar).
WARNING
Always protect the valve body by using a damp cloth to prevent the valve from
overheating. Do not braze with the valve body exceeding 250°F (120°C).
8) Install the new drier (See “3. Drier”).
9) Check for leaks using nitrogen gas at 140 psig (9.65 bar) and soap bubbles.
10) Evacuate the system and charge it with refrigerant (See “1.[c] Evacuation and Recharge”).
11) Attach the solenoid coil to the valve body, and secure it with the screw.
12) Connect the leads.
13) Refit the panels in their correct positions.
U1VA6060209
14) Plug in the icemaker or connect the power source.
45
6. Pump Motor
1) Unplug the icemaker or disconnect the power source.
2) Remove the top panel, door and pipe cover (rear).
3) Disconnect the pump motor leads inside the pipe cover (rear).
4) Drain the water tank by compressing the plastic tabs on the suction tube to release the
joint.
5) Spread the tabs on both sides of the water tank and pull it toward you.
6) Carefully remove the plastic housing by releasing the retaining screws.
7) Disconnect the pump suction and discharge tubings.
8) Release the pump retaining screws to remove the pump.
9) Install the new motor in the reverse order of the removal procedure.
10) Plug in the icemaker or connect the power source, and check for leaks.
11) Refit the panels in their correct positions.
7. Fan Motor
1) Unplug the icemaker or disconnect the power source.
2) Remove the louver and front panel.
3) Disconnect the connector of the fan motor.
4) Remove the fan motor bracket and the fan motor.
5) Cut the leads of the fan motor allowing enough lead length to reconnect using closed end
connectors.
6) Install the new fan motor in the reverse order of the removal procedure.
7) Refit the panels in their correct positions.
9) Plug in the icemaker or connect the power source.
46
U1VA6060209
8. Water Valve
1) Close the water supply shut-off valve.
2) Unplug the icemaker or disconnect the power source.
3) Remove the door and top panel.
4) Disconnect the receptacle (leads) from the water valve.
5) Remove the valve outlet tubing.
6) Remove the water supply inlet and water valve by releasing the two retaining screws.
7) Install the new valve in the reverse order of the removal procedure.
8) Open the water supply shut-off valve.
9) Plug in the icemaker or connect the power source.
10) Check for leaks.
11) Refit the panels in their correct positions.
Note: When replacing parts, disassemble as shown in Fig. 7 (page 25) and replace the
defective parts.
9. Controller Board
1) Unplug the icemaker or disconnect the power source.
2) Remove the louver and door.
3) Remove screws and the control box cover.
4) Pull out the control box from the machine compartment, and disconnect the connectors on
the controller board.
5) Pull out and remove the controller board from the control box.
U1VA6060209
6) Install the new controller board and reassemble the control box in the reverse order of the
removal procedure.
7) Refit the panels in their correct positions.
8) Plug in the icemaker or connect the power source.
47
10. Thermistor for Cube Control
1) Unplug the icemaker or disconnect the power source.
2) Remove the top and front panels, door, louver, pipe cover (rear) and control box cover.
3) Remove the connectors on the controller board, referring to “9. Controller Board.”
4) Unscrew and remove the thermistor holder and thermistor, located on the evaporator.
5) Install the new thermistor in the reverse order of the removal procedure, by using a sealant
(high-thermal conductive type). See Fig. 10.
Note: Recommended sealant is KE4560RTV, manufactured by Shinetsu Silicon. When
other type of sealant used, the cube size and performance will be changed.
not use silicone sealant as this will insulate the thermistor.
Sealant
Do
* Thermistor and Leads are FRAGILE.
HANDLE WITH CARE.
* Leads
Holder
Screw
* Thermistor
Sealant
Holder
Holder
Evaporator
Fig. 10
48
U1VA6060209
11. Bin Control Thermostat
1) Unplug the icemaker or disconnect the power source.
2) Remove the top panel, door and pipe cover (rear).
3) Remove the thermostat holder from the storage bin, and disconnect the the bin control
thermostat bulb.
4) Remove the bin control thermostat from the icemaker body (rear).
5) Cut off heater wires and splice new heater wires.
6) Install the new bin control thermostat in the reverse order of the removal procedure.
7) Refit the panels in their correct positions.
8) Plug in the icemaker or connect the power source.
U1VA6060209
49
HOSHIZAKI
HOSHIZAKI AMERICA, INC.
618 HIGHWAY 74 SOUTH
PEACHTREE CITY, GA 30269
U.S.A.
PHONE: 770-487-2331
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