Hoshizaki America, Inc.
Hoshizaki
Self-Contained Cubelet
Models
C-100BAF-AD
“A Superior Degree
of Reliability”
www.hoshizaki.com
C-100BAF-ADDS
SERVICE MANUAL
Number: 73180
Issued: 10-6-2010
IMPORTANT
Only qualied service technicians should install, service, and maintain the
icemaker. No service or maintenance should be undertaken until the technician
has thoroughly read this Service Manual. Failure to service and maintain
the equipment in accordance with this manual may adversely affect safety,
performance, component life, and warranty coverage.
Hoshizaki provides this manual primarily to assist qualied 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, write, or send an e-mail message 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 Support
(770) 487-2331
Fax: 1-800-843-1056
(770) 487-3360
E-mail: techsupport@hoshizaki.com
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.
2
Important Safety Information
Throughout this manual, notices appear to bring your attention to situations which could
result in death, serious injury, or damage to the unit.
WARNING Indicates a hazardous situation which could result in death or
serious injury.
CAUTION Indicates a situation which could result in damage to the unit.
IMPORTANT Indicates important information about the use and care of the
unit.
WARNING
This icemaker 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.
To reduce the risk of death, electric shock, serious injury, or re, follow
basic precautions including the following:
• This unit requires an independent power supply. See the nameplate for proper
voltage and breaker/fuse size. Failure to use a proper breaker or fuse can
result in a tripped breaker, blown fuse, or damage to existing wiring. This
could lead to heat generation or re.
• THIS APPLIANCE MUST BE GROUNDED: This unit is equipped with a
3-prong grounding plug to reduce the risk of potential shock hazards. It must
be plugged into a properly grounded, independent 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 power cord and do not use an adapter
plug.
• Do not use an extension cord.
• Make sure the power switch is in the "OFF" position before plugging in or
unplugging the unit to reduce the risk of electric shock.
• Do not use a unit 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 unit, be sure to pull the
plug, not the cord, and do not jerk the cord.
• To reduce the risk of electric shock, do not touch the plug or power switch with
damp hands.
• Do not place ngers or any other objects into the ice discharge opening.
• This unit should be disassembled or repaired only by qualied service
personnel to reduce the risk of electric shock, injury, or re.
• Do not make any alterations to the unit. Alterations could result in electric
shock, injury, re, or damage to the unit.
3
IMPORTANT
This manual should be read carefully before the icemaker is serviced or
maintenance operations are performed. Only qualied service technicians
should install, service, and maintain the icemaker. Read the warnings contained
in this booklet carefully as they give important information regarding safety.
Please retain this booklet for any further reference that may be necessary.
CONTENTS
Important Safety Information ................................................................................................. 3
I. Specications ...................................................................................................................... 6
II. General Information ........................................................................................................... 7
A. Construction .................................................................................................................. 7
1. Icemaker .................................................................................................................. 7
2. Ice Making Unit ........................................................................................................ 8
B. Sequence of Operation ................................................................................................. 9
1. Freeze Cycle ............................................................................................................ 9
2. Bin Control Thermostat Shutdown ........................................................................... 9
III. Technical Information ...................................................................................................... 10
A. Water Circuit and Refrigeration Circuit ........................................................................ 10
B. Wiring Diagram .............................................................................................................11
1. C-100BAF Series ....................................................................................................11
2. C-100BAF Series with Optional Drain Pump HS-0248 ...........................................11
3. Sequence Wiring Diagram ..................................................................................... 12
a) Freeze Cycle ....................................................................................................... 12
b) Bin Control Thermostat Shutdown ...................................................................... 13
c) Low Water/Freeze-Up Safety Shutdown ............................................................. 14
d) Gear Motor Protector (external overload) Shutdown .......................................... 15
e) Optional Drain Pump HS-0248 Safety Shutdown ............................................... 16
C. Performance Data ....................................................................................................... 17
IV. Service Diagnosis ........................................................................................................... 18
A. Ice Production Check .................................................................................................. 18
B. Diagnostic Procedure .................................................................................................. 18
C. Diagnostic Charts ....................................................................................................... 20
1. No Ice Production ................................................................................................... 20
2. Low Ice Production ................................................................................................ 22
3. Other ...................................................................................................................... 23
D. Optional Drain Pump HS-0248 .................................................................................... 24
1. Overview ................................................................................................................ 24
2. Float Switch Cleaning ............................................................................................ 24
V. Removal and Replacement of Components .................................................................... 26
A. Service for Refrigerant Lines ....................................................................................... 26
1. Refrigerant Recovery ............................................................................................. 26
2. Brazing .................................................................................................................. 27
3. Evacuation and Recharge (R-134a) ...................................................................... 27
B. Removal and Replacement of Compressor ................................................................. 28
4
C. Removal and Replacement of Evaporator Assembly Components ............................. 30
1. Upper Bearing Wear Check .................................................................................. 31
2. Removal and Replacement of Extruding Head ...................................................... 32
3. Removal and Replacement of Auger ..................................................................... 32
4. Removal and Replacement of Evaporator ............................................................. 33
5. Removal and Replacement of Mechanical Seal and Lower Housing ................... 35
6. Removal and Replacement of Gear Motor ............................................................ 36
D. Removal and Replacement of Fan Motor .................................................................... 36
E. Removal and Replacement of Water Reservoir .......................................................... 37
F. Removal and Replacement of Bin Control Thermostat Assembly ................................ 37
VI. Cleaning and Maintenance ............................................................................................. 38
A. Cleaning and Sanitizing Instructions ........................................................................... 38
1. Cleaning Solution ................................................................................................... 38
2. Cleaning Procedure ............................................................................................... 38
3. Sanitizing Solution ................................................................................................. 40
4. Sanitizing Procedure - Initial .................................................................................. 40
5. Sanitizing Procedure - Final ................................................................................... 41
B. Maintenance ................................................................................................................ 42
C. Preparing the Icemaker for Long Storage ................................................................... 44
5
I. Specications
A
A
)
A
A. C-100BAF-AD, C-100BAF-ADDS
AC SUPPLY VOLTAGE 115/60/1
AMPERAGE 4.0 A
MINIMUM CIRCUIT AMPACITY 15 A
MAXIMUM FUSE SIZE 15 A
PPROXIMATE ICE PRODUCTION
PER 24 HR. Temp.(°F) 50 70 90
lbs./day ( kg/day
Reference without *marks 80 81 (37) 71 (32) 66 (30)
SHAPE OF ICE Cubelet
ICE QUALITY Approx. 90%
PPROXIMATE STORAGE CAPACITY 29 lbs. (13 kg) [Bin Control Setting 22 lbs. (10.0 kg)]
ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F
ELECTRIC W (kWH/100 lbs.) 310 (12.1) 297 (7.7)
WATER gal./24HR (gal./100 lbs.) 7.7 (12) 11.1 (12)
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 104 lbs. ( 47 kg ), Shipping 115 lbs. (52 kg) without pallet
CONNECTIONS - ELECTRIC Cord Connection
- WATER SUPPLY Inlet 1/2" FPT
- DRAIN Outlet 1/2" FPT
ICE MAKING SYSTEM Auger type
HARVESTING SYSTEM Direct Drive Auger (80W Gear Motor)
ICE MAKING WATER CONTROL Mechanical float valve
COOLING WATER CONTROL N/A
BIN CONTROL SYSTEM Thermostat
COMPRESSOR Hermetic, Model QA51K13GAU6
CONDENSER
EVAPORATOR Copper Tube on Cylinder
REFRIGERANT CONTROL Capillary Tube
REFRIGERANT CHARGE R134a 3.17 oz. (90 g)
DESIGN PRESSURE High 240 PSIG, Low 120 PSIG
P.C. BOARD CIRCUIT PROTECTION N/A
COMPRESSOR PROTECTION Auto-reset Overload Protector
GEAR MOTOR PROTECTION Manual reset Circuit Breaker
LOW WATER PROTECTION Suction Temperature Safety
ACCESSORIES - SUPPLIED Ice Scoop; pump adapter hose
- REQUIRED N/A
OPERATING CONDITIONS VOLTAGE RANGE 104 - 127 V
AGENCY UL OUTDOOR APPROVED, cUL
mbient WATER TEMP. (°F)
70 *92 (42) 89 (40) 84 (38)
90 66 (30) *62 (28) 57 (26)
100 55 (25) 54 (24) *49 (22)
Air-cooled, Fin and tube type
AMBIENT TEMP. 45 - 100° F
WATER SUPPLY TEMP. 45 - 90° F
WATER SUPPLY PRESSURE 7 - 113 PSIG
ETL
Note: We reserve the right to make changes in specications and design without prior
notice.
6
II. General Information
A. Construction
1. Icemaker
Ice Discharge Opening
Bin Control
Thermostat Bulb
Slope
Air-Cooled Condenser and
Condenser Fan Motor
Gear Motor Protector (External Overload) Reset Switch
Control Box
Power Switch
Front Panel
Louver
Bin Control Thermostat
Float-Operated Water Valve
Water Reservoir
Suction Temperature Safety
Upper Rear Panel
Lower Rear Panel
Front
C-100BAF-AD Shown
Top Panel
Evaporator Assembly
Gear Motor
Compressor
Drier
Rear
C-100BAF-AD Shown
7
Fig. 1
2. Ice Making Unit
Cutter (motionless)
Allen Head Cap Screw
Extruding Head
and Upper
Bearing
Auger
Cylinder
Mechanical Seal
O-Ring
Evaporator Flange
Insulation
Gear Motor
Housing and
Lower Bearing
Spline Coupling
Hex Head
Bolt with
Washer
Allen Head
Cap Screw
with Washer
Fig. 2
8
B. Sequence of Operation
This icemaker utilizes a thermostatic bin control to switch the gear motor, fan motor, and
compressor on and off as needed. This icemaker utilizes a oat-operated water valve in
the water reservoir to allow water into the icemaker as needed. After the power switch is
placed in the "ON" position, the sequence is as follows:
1. Freeze Cycle
GM, FM, CR, and Comp energize. As the water in the evaporator cools, ice starts
forming within 4 to 6 minutes. This time frame depends on the inlet water and ambient
temperature conditions.
The oat-operated water valve allows water into the reservoir as needed to continue the
ice making process. This continues until BC shuts down the icemaker or power is turned
off to the icemaker.
2. Bin Control Thermostat Shutdown
Ice lls storage bin to level of BC. When BC opens, GM, FM, CR, and Comp de-energize.
When ice level lowers and BC closes, the icemaker starts operating again.
C-100BAF Series Sequence Flow Chart and Component Operation
BC closed
Power Switch
"ON"
BC closed
GM energized
FM energized
CR energized
Comp energized
1. Freeze Cycle
The oat-operated water valve allows
water into the reservoir as needed to
continue the ice making process.
BC closed
GM continues
FM continues
CR continues
Comp continues
When BC opens, the icemaker shuts
down. When BC closes, the icemaker
starts operating again.
2. Shutdown
Full Bin
BC open
BC open
GM de-energized
FM de-energized
CR de-energized
Comp de-energized
Legend: BC–bin control thermostat; Comp–compressor; CR–compressor relay;
FM–fan motor; GM–gear motor
9
III. Technical Information
A. Water Circuit and Refrigeration Circuit
1. C-100BAF Series
Float-Operated
Water Inlet
Water Valve
Water
Reservoir
Overow Hose
Water Level
Evaporator
Assembly
Water Supply
Drier
Gear
Motor
Capillary Tube
Condenser
Condenser
Fan Motor
Discharge
Compressor
10
Suction
Temperature
Safety
Fig. 3
Suction
B. Wiring Diagram
1. C-100BAF Series
(3W)
(external)
(external
overload
2.4~3.0A)
(internal)
2. C-100BAF Series with Optional Drain Pump HS-0248
(3W)
(external)
(internal)
(external
overload
2.4~3.0A)
11
3. Sequence Wiring Diagram
a) Freeze Cycle
Power supplied. Gear motor, fan motor, compressor relay, and compressor energize. The
oat-operated water valve allows water into the reservoir as needed to continue the ice
making process.
(external
overload
2.4~3.0A)
(3W)
(internal)
(external)
12
C-100BAF Series
b) Bin Control Thermostat Shutdown
Ice lls storage bin to level of bin control thermostat. Bin control thermostat opens. Gear
motor, fan motor, compressor relay, and compressor de-energize.
(external
overload
2.4~3.0A)
(3W)
(internal)
(external)
13
C-100BAF Series
c) Low Water/Freeze-Up Safety Shutdown
If the water supply is interrupted or a freeze-up condition occurs, the decrease in suction
line temperature causes the suction temperature safety to open and shut down the
icemaker. See the table below for suction temperature safety cut-out/cut-in temperatures.
Suction Temperature Safety
Cut-out 23.9°F±2.7°F (-4.5°C±1.5°C)
Cut-in 29.0°F±2.7°F (-1.5°C±1.5°C)
(external
overload
2.4~3.0A)
(3W)
(internal)
(external)
14
C-100BAF Series
d) Gear Motor Protector (external overload) Shutdown
If gear motor amperage exceeds 2.4~3.0 amps, the gear motor protector (external
overload) operates independently to turn off the gear motor. The gear motor external
overload can be manually reset by pressing the switch on the control box.
(external
overload
2.4~3.0A)
(3W)
(internal)
(external)
15
C-100BAF Series
e) Optional Drain Pump HS-0248 Safety Shutdown
If the water level in the drain pump reservoir rises high enough to close the drain pump
upper oat switch, the drain pump safety interrupts power to the icemaker. When the
water level lowers enough to open the drain pump upper oat switch, power is restored to
the icemaker.
The pump motor remains energized as long as the drain pump lower oat switch is
closed.
(3W)
(external
overload
2.4~3.0A)
(external)
(internal)
16
C-100BAF Series
C. Performance Data
1. C-100BAF-AD, C-100BAF-ADDS
APPROXIMATE ICE
PRODUCTION PER 24 HR.
lbs./day kg./day
APPROXIMATE ELECTRIC
CONSUMPTION
watts
APPROXIMATE WATER
CONSUMPTION PER 24 HR.
gal./day m3/day
Evaporator Outlet
HEAD PRESSURE
PSIG kg/cm2G
SUCTION PRESSURE
PSIG kg/cm2G
AMBIENT TEMP.
(ºF/ºC) 50/10 70/21 90/32
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
92
81 37 71 32 66 30
66 30
55 25 54 24
297
310
313
316
11
0.04
10 0.04 9 0.03 8 0.03
8 0.03
7 0.03 6 0.02
-5
-5
-2
1
115
126 8.9 149 10.5 156 11.0
130 9.1
129 9.1 167 11.7
12
13 0.9 15 1.1 16 1.1
13 0.9
13 0.9 17 1.2
WATER TEMP. (ºF/ºC)
42
89 40 84 38
62
11 0.04 10 0.04
8
8.1
130 9.1 141 9.9
165
0.8
13 0.9 15 1.1
17
28
308
310
310
316
0.03
-5 -5
-2
-2
1
11.6
1.2
57 26
49
22
309
312
316
316
7 0.08
6
0.02
-2
1
1
174 12.2
183
12.9
18 1.3
19
1.3
TOTAL HEAT OF REJECTION FROM CONDENSER
1850 BTU/h [AT 90ºF (32ºC) / WT 70ºF (21ºC)]
Note:
1. The data not in bold should be used for reference only.
2. We reserve the right to make changes in specications and design without prior
notice.
17
IV. Service Diagnosis
WARNING
1. This unit should be diagnosed and repaired only by qualied service
personnel to reduce the risk of death, electric shock, serious injury, or re.
2. Risk of electric shock. Use extreme caution and exercise safe electrical
practices.
3. Moving parts (e.g., fan blade) can crush and cut. Keep hands clear.
4. CHOKING HAZARD: Ensure all components, fasteners, and thumbscrews
are securely in place after the unit is serviced. Make sure that none have
fallen into the storage bin.
5. Make sure all food zones in the icemaker and storage bin are clean after
the unit is serviced. For cleaning procedures, see "VI. Cleaning and
Maintenance."
A. Ice Production Check
To check production, prepare a bucket or pan to catch the ice and a set of scales
to weigh the ice. After the icemaker has operated for 10 to 20 minutes, catch the ice
production for 10 minutes. Weigh the ice to establish the batch weight. Multiply the
batch weight by 144 for the total production in 24 hours. When conrming production
or diagnosing low production, see "III. C. Performance Data" for typical production
information.
B. Diagnostic Procedure
This diagnostic procedure is a sequence check that allows you to diagnose the electrical
system and components. Before proceeding, check for correct installation, adequate
water supply (minimum of 7 PSIG, maximum of 113PSIG), and proper voltage per unit
nameplate. When checking voltage (115VAC), always choose a white (W) neutral wire to
establish a good neutral connection.
1) Move the power switch to the "OFF" position, then unplug the unit from the electrical
outlet.
2) Remove the front panel and louver. Remove the screws securing the control box, then
gently pull the box out. Remove the control box cover.
3) Plug the unit back in. Place the power switch in the "ON" position.
4) Freeze Cycle – GM, FM, CR, and Comp energize. Ice production begins 4 to 6 minutes
after Comp starts depending on ambient and water conditions.
Diagnosis:Check that GM, FM, and Comp start. If not, check the power switch, STS
(see"III.B.3.c)Low Water/Freeze-Up Safety Shutdown"), BC assembly (including
heater), GM protector (external overload) (see "III.B.3.d) Gear Motor Protector (external
overload) Shutdown"), GM thermal protector (internal overload), GM windings, GM
capacitor, voltage to FM, voltage on CR, PTC relay, voltage on Comp terminals, Comp
windings, and Comp thermal protector (external overload). If optional drain pump
HS-0248 is installed, see "IV.D. Optional Drain Pump HS-0248." If GM starts, but the
auger does not turn, check the spline coupling between the auger and GM.
18
5) Shutdown (bin full) – Ice lls storage bin to level of BC. BC opens. GM, FM, CR, and
Comp de-energize. Diagnosis: When the icemaker is running, hold ice in contact with
BC bulb. If the components fail to de-energize, check BC.
6) Move the power switch to the "OFF" position and unplug the unit from the electrical
outlet.
7) Make any repairs necessary, then replace the removed parts in the reverse order of
which they were removed.
8) Plug the unit back in. Move the power switch to the "ON" position to start the automatic
icemaking process.
Legend: BC–bin control thermostat; Comp–compressor; CR–compressor relay;
FM–fan motor; GM–gear motor; STS–suction temperature safety
19
C. Diagnostic Charts
1. No Ice Production
Problem Possible Cause Remedy
[1] The icemaker will not
start.
a) Power Supply 1. Off, blown fuse, or
tripped breaker.
2. Power cord
unplugged.
3. Loose connection. 3.Tighten.
4. Bad contacts. 4. Check for continuity and
5. Not within
specications.
b) Power Switch
(Control Box)
c) Suction Temperature
Safety
(Low Water/Freeze-Up
Safety)
d) Bin Control Thermostat
Assembly (with
integrated heater)
e) Gear Motor Protector
(External Overload)
(2.4~3.0A)
1. "OFF" position. 1. Move to "ON" position.
2. Bad contacts. 2. Check for continuity and
1. Open due to water
supply cut-off.
2. Open due to
evaporator freeze-up
(gear motor not
operating).
3. Bad contacts. 3. Check for continuity and
1. Open with bin lled
with ice.
2. Ambient temperature
too cool.
3. Bulb out of position. 3. Place in position.
4. Bad contacts. 4. Check for continuity
5. Bad thermostat
heater.
1. Tripped. 1. Press switch on control
1. Turn on, replace, or reset.
2. Plug into outlet.
replace.
5. Refer to nameplate and
correct.
replace.
1. Check water supply,
water lters, water inlet
strainer-washer, oat, and
water valve.
2. Check gear motor
operation.
replace.
1. Remove ice.
2. Increase ambient
temperature.
and replace. See
"V.F. Removal and
Replacement of Bin
Control Thermostat
Assembly."
5. Check and replace.
See "V.F. Removal
and Replacement of
Bin Control Thermostat
Assembly."
box to reset. Check
supply voltage, gear
motor amperage, gear
motor bearings, and
auger bearings (see
"V.C.1. Upper Bearing
Wear Check"). Check for
evaporator freeze-up.
20
Problem Possible Cause Remedy
[1] The icemaker will not
start (continued).
[2] Gear motor starts,
but compressor will
not start or operates
intermittently.
[3] Compressor starts,
but gear motor will
not start.
f) Gear Motor Internal
Overload (Thermal
Protector)
g) Optional Drain Pump
HS-0248 Safety
a) Power Supply 1. Not within
b) Compressor Relay 1. Open coil. 1. Replace.
c) PTC Relay 1. Bad contacts. 1. Check for continuity and
d) External Compressor
Overload (Thermal
Protector)
e) Compressor 1. Wiring to compressor. 1. Check for loose
a) Gear Motor 1. Bad gear motor
1. Open. 1. Allow to cool and reset.
Check gear motor
bearings, auger bearings
(see "V.C.1. Upper Bearing
Wear Check"), and
supply voltage. Check for
evaporator freeze-up.
1. Open. 1. Check drain pump. See
"IV.D. Optional Drain Pump
HS-0248."
1. Refer to nameplate and
specications.
2. Open contacts. 2. Replace.
2. Coil winding open. 2. Replace.
3. Loose connections. 3.Tighten.
1. Open due to clogged
condenser coil.
2. Open due to
condenser fan not
operating.
3. Defective. 3. Let compressor cool and
2. Motor winding opened
or grounded.
3. Compressor locked. 3. Replace compressor.
capacitor.
2. Open windings. 2. Replace gear motor.
correct.
replace.
1. Clean condenser coil.
2. Check condenser fan for
continuity and replace.
allow overload to reset.
If overload does not reset,
replace overload.
connection or open, and
tighten or replace.
2. Replace compressor.
1. Replace capacitor.
[4] Gear motor and
compressor start, but
no ice is produced.
3. Locked bearings 3. Replace gear motor.
a) Water Supply 1. Water supply off or
pressure too low.
(suction temperature
safety cycling open
and closed)
21
1. Check water supply, lters,
water inlet strainer-washer,
oat, and water valve. Get
recommended pressure
(7to 113 PSIG).
Problem Possible Cause Remedy
[4] Gear motor and
compressor start, but
no ice is produced
(continued).
b) Refrigerant Line 1. Gas leaks. 1. Check for leaks with a leak
detector. Recover, repair,
replace drier, evacuate,
and recharge. See "V.A.
Service for Refrigerant
Lines."
2. Refrigerant lines or
components restricted.
c) Gear Motor 1. Spline coupling or
gear broken and auger
not turning.
d) Compressor 1. Defective. 1. See "2.[1]d) Compressor."
2. Recover, repair, replace
drier, evacuate, and
recharge. See "V.A.
Service for Refrigerant
Lines."
1. Replace spline coupling or
gear motor.
2. Low Ice Production
Problem Possible Cause Remedy
[1] Low ice production. a)Bin Control Thermostat
Assembly (with
integrated heater)
b)High-Side Pressure
Too High
c) Refrigerant Line 1. Refrigerant leak/low
d)Compressor 1. Faulty external
1. Ambient temperature
too cool.
2. Bulb out of position. 2. Place in position.
3. Bad thermostat
heater.
1. Dirty condenser. 1. Clean.
2. Ambient temperature
too warm.
3. Bad fan motor. 3. Check and replace.
charge.
2. Refrigerant lines or
components
restricted.
3. Overcharged. 3. Recharge.
compressor overload
(thermal protector)
2. Inefficient compressor. 2. Replace compressor.
1. Increase ambient
temperature.
3. Check and replace.
See "V.F. Removal and
Replacement of Bin
Control Thermostat
Assembly."
2. Reduce temperature.
1. Check for leaks with a leak
detector. Recover, repair,
replace drier, evacuate,
and recharge. See "V.A.
Service for Refrigerant
Lines."
2. Recover, repair, replace
drier, evacuate, and
recharge. See "V.A.
Service for Refrigerant
Lines."
1. Replace overload.
22
3. Other
Problem Possible Cause Remedy
[1] Abnormal noise. a)Fan Motor 1. Bearing worn out. 1. Replace fan motor.
2. Fan blade deformed. 2. Replace fan blade.
[2] Overow from
reservoir (water does
not stop).
[3] Gear motor protector
(external overload)
trips frequently.
3. Fan blade does not
move freely.
b)Compressor 1. Mounting pad out of
position.
2. Bearings worn out or
cylinder valve broken.
c) Refrigerant Lines 1. Rub or touch lines or
other surfaces.
d)Auger 1. Bearings or auger
worn out.
e)Gear Motor 1. Bearing or gear worn
out/damaged.
f) Evaporator 1. Scale on inside wall
of evaporator freezing
cylinder.
2. Low refrigerant
pressures.
a)Water Supply 1. Water pressure too
high.
b)Water Valve 1. Does not close. 1. Clean or replace.
c) Float 1. Bad. 1. Check for proper
a)Power Supply 1. Not within
specications.
b)Gear Motor Protector 1. Defective. 1. Check and replace.
c) Auger 1. Bearings or auger
worn out.
d)Gear Motor 1. Bearing or gear worn
out or damaged.
e)Bin Control Thermostat
Assembly (with
integrated heater)
1. Bad contacts. 1. Check for continuity
3. Replace fan blade and/or
fan motor.
1. Reinstall.
2. Replace compressor.
1. Reposition.
1. Replace bearings or
auger. See "V.C.1. Upper
Bearing Wear Check."
1. Replace.
1. Use Hoshizaki "Scale
Away" solution to clean
periodically. See "VI. A.
Cleaning and Sanitizing
Instructions." If the water
is found hard by testing,
install a softener.
2. Check for leaks with a
leak detector. Check
charge. Recover, repair,
replace drier, evacuate,
and recharge. See "V.A.
Service for Refrigerant
Lines."
1. Install a pressure reducing
valve.
operation and replace.
1. Refer to nameplate and
correct.
1. Replace bearings or
auger. See "V.C.1. Upper
Bearing Wear Check."
1. Replace gear motor.
and replace. See
"V.F. Removal and
Replacement of Bin
Control Thermostat
Assembly."
23
D. Optional Drain Pump HS-0248
1. Overview
As ice melts, water drains from the storage bin into the drain pump reservoir. When
the drain pump's lower oat switch closes, the pump motor energizes and pumps out
the water. If water cannot be pumped out of the drain pump reservoir due to a blocked
discharge hose, bad check valve, or bad pump motor, the upper oat switch closes as
the water level in the pump rises. When the upper oat switch closes, this activates the
safety. The safety interrupts power to the icemaker until the upper oat switch opens.
Power is supplied to the pump motor as long as the lower oat switch is closed.
For schematics, see "III.B.2. C-100BAF Series with Optional Drain Pump HS-0248" and
"III.B.3.e) Optional Drain Pump HS-0248 Safety Shutdown."
2. Float Switch Cleaning
Depending on local water conditions, scale may build up on the oat switch. Scale on the
switch can cause the oat to stick. In this case, the oat switch should be cleaned and
checked.
1) Move the power switch to the "OFF" position, then unplug the unit from the electrical
outlet. WARNING! Moving the power switch to the "OFF" position does not
de-energize the power supply to the pump. The icemaker must be unplugged to
de-energize the power supply to the pump.
2) Disconnect the vent hose from the upper rear panel. See Fig. 4.
3) Remove the upper rear panel, then the lower rear panel.
4) Remove the reservoir cover from the drain pump assembly. See Fig. 5.
5) Leave the oat switch assembly connected to the oat switch cover and leave the
oat on the shaft. Wipe down the oat switch assembly with a mixture of 1 part
recommended cleaner Hoshizaki "Scale Away" and 25 parts warm water.
6) Rinse the oat switch assembly, then replace the reservoir cover in its original position.
Upper Rear Panel
Reservoir Cover
Vent Hose
Float Switch Assembly
Discharge Hose
Fig. 4
Lower Rear Panel
Fig. 5
24
7) Make sure all hose connections are secure, then reinstall the lower rear panel and
upper rear panel in their correct positions. WARNING! Make sure that there are no
wires pinched between the rear covers and icemaker.
8) Resecure the vent hose to the icemaker. CAUTION! The vent hose must be attached
and secured to the icemaker or water damage may occur. Make certain there
are no kinks in the vent hose. The drain pump will not operate correctly with a
partially blocked vent hose.
9) Plug the icemaker into the electrical outlet.
10) Test the drain pump by slowly pouring water into the icemaker's ice storage bin.
Approximately 1 pint (500 ml) of water is required to close the lower oat switch and
activate the drain pump. The drain pump will turn on automatically and pump out the
water.
11) To test the operation of the drain pump internal safety switch, move the power switch to
the "ON" position. Pour another quart (950 ml) of water into the icemaker's ice storage
bin, then completely restrict the discharge hose while the drain pump is operating.
Pour more water into the icemaker's ice storage bin until the upper oat switch closes
and the icemaker turns off. The drain pump will continue to operate. Check for leaks.
Remove the discharge hose restriction and allow the water to be pumped out normally.
Power to the icemaker will be restored when the water in the drain pump returns to a
normal level and the upper oat switch opens.
25
V. Removal and Replacement of Components
WARNING
1. This unit should be diagnosed and repaired only by qualied service
personnel to reduce the risk of death, electric shock, serious injury, or re.
2. Move the power switch to the "OFF" position and unplug the unit from the
electrical outlet before servicing.
3. CHOKING HAZARD: Ensure all components, fasteners, and thumbscrews
are securely in place after the unit is serviced. Make sure that none have
fallen into the storage bin.
4. Make sure all food zones in the icemaker and storage bin are clean after
the unit is serviced. For cleaning procedures, see "VI. Cleaning and
Maintenance."
A. Service for Refrigerant Lines
WARNING
1. Repairs requiring the refrigeration circuit to be opened must be performed by
properly trained and EPA-certied service personnel.
2. Always recover the refrigerant and store it in an approved container. Do not
discharge the refrigerant into the atmosphere.
3. 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-134a
as a mixture with pressurized air for leak testing.
CAUTION
1. Do not leave the system open for longer than 15 minutes when replacing or
servicing parts. The Polyol Ester (POE) oils used in R-134a units can absorb
moisture quickly. Therefore it is important to prevent moisture from entering
the system when replacing or servicing parts.
2. 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.
3. 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).
1. Refrigerant Recovery
No refrigerant access valves are provided on this unit. Using proper refrigerant
practices, utilize a temporary tap-line valve on the high side to recover the refrigerant.
Store the refrigerant in an approved container. Do not discharge the refrigerant into the
atmosphere.
After recovery is complete, replace the tap-line valve with a proper, permanent access
valve.
26
2. Brazing
WARNING
1. R-134a itself is not ammable at atmospheric pressure and temperatures up
to 212°F (100°C).
2. R-134a itself is not explosive or poisonous. However, when exposed to high
temperatures (open ames), R-134a can be decomposed to form hydrouoric
acid and carbonyl uoride both of which are hazardous.
3. Do not use silver alloy or copper alloy containing arsenic.
4. 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-134a
as a mixture with pressurized air for leak testing.
1) Braze all ttings while purging with nitrogen gas owing at a pressure of 3 to 4 PSIG.
CAUTION
1. 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.
2. 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-134a as a mixture with
pressurized air for leak testing.
3. Evacuation and Recharge (R-134a)
1) Attach a vacuum pump to the system. Be sure the high-side charging hose is connected
to the eld-installed high-side access valve.
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, then open the high-side valve on the gauge manifold. 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 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. See the nameplate for the required refrigerant charge. Hoshizaki recommends
only virgin refrigerant or reclaimed refrigerant which meets the requirements of ARI
Standard 700 (latest edition) be used.
27
6) A liquid charge is recommended when charging an R-134a system. 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) Close the high-side valve on the gauge manifold, then close the refrigerant access valve
(if applicable). Disconnect the gauge manifold hose.
9) Cap the access valve to prevent a possible leak.
B. Removal and Replacement of Compressor
CAUTION
1. 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.
2. 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).
Note: Hoshizaki recommends that compressor starting components be replaced at the
same time as the compressor. Due to the ability of the POE oil in the compressor
to absorb moisture quickly, the compressor must not be opened more than 15
minutes for replacement or service.
1) Move the power switch to the "OFF" position, then unplug the unit from the electrical
outlet.
2) Remove the upper and lower rear panels, front panel, and louver. See Fig. 1. Remove
the screws securing the control box, then gently move the box out of the way.
3) Install a temporary tap-line valve on the high side, then recover the refrigerant and store
it in an approved container.
4) Remove the terminal cover on the compressor and disconnect the compressor wiring.
5) Remove the discharge and suction pipes.
6) Remove the hold-down bolts, washers, and rubber grommets.
7) Remove the compressor.
8) Attach the rubber grommets of the prior compressor to the new compressor.
9) Place the compressor in position and secure it using the bolts and washers.
10) Replace the tap-line valve with a proper, permanent access valve.
11) Remove the drier, then place the new drier in position.
12) Remove the plugs from the suction, discharge, and process pipes.
13) Braze all ttings while purging with nitrogen gas owing at a pressure of 3 to 4 PSIG.
14) 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-134a as a mixture with
pressurized air for leak testing.
28
15) Evacuate the system, then charge it with refrigerant. See the nameplate for the required
refrigerant charge.
16) Connect the terminals and replace the terminal cover in its correct position.
17) Replace the control box, louver, and panels in their correct positions.
18) Plug the unit back in. Move the power switch to the "ON" position.
29
C. Removal and Replacement of Evaporator Assembly Components
Thumbscrew
Spout
Cutter
(motionless)
Packing
Evaporator
Flange
Allen Head
Cap Screw
Extruding Head and
Upper Bearing
Auger
Drain Hose
Connection
Allen Head
Cap Screw
with Washer
Hex Head Bolt with
Washer
Evaporator
Reservoir Hose
Connection
Spring Retainer
Mechanical Seal
O-Ring
Housing and
Lower Bearing
Spline Coupling
Fig. 6
Gear Motor
Allen Head
Cap Screw
with Washer
30
1. Upper Bearing Wear Check
To ensure that the bearing inside the extruding head does not exceed the wear tolerance
of .02", follow the instructions below.
1) Move the power switch to the "OFF" position, then unplug the unit from the electrical
outlet.
2) Remove all ice from the storage bin.
3) While maintaining a hold on the door, remove the hinge stop pin from hinge (B). Pull out
the bottom of the door slightly, then gently remove the door from hinge (A). See Fig. 7.
4) Remove the top panel.
5) Remove the spout.
6) Remove the cutter.
Top Panel
Spout
Cutter
Hinge (A)
Fig. 7
Hinge (B)
Hinge Stop Pin
7) Grasp the top of the auger and move the
.02" Round Stock or Pin Gauge
auger towards you and then try to insert a
.02" round stock or pin gauge in between
Auger
the back side of the auger shaft and the
bearing surface. See Fig. 8. Check several
locations around the auger shaft. If the
gauge goes between the shaft and the
bearing at any point or if the bearing is
Extruding Head
scratched or cracked, both the top bearing
in the extruding head and the lower
bearing in the housing should be replaced.
Instructions for removing the extruding
head and housing are located later in this
Fig. 8
procedure.
Note: Replacing the bearing requires a bearing press adaptor. If one is not available,
replace the entire extruding head and housing.
8) Replace the removed parts in the reverse order of which they were removed.
9) Plug the unit back in. Move the power switch to the "ON" position.
31
2. Removal and Replacement of Extruding Head
1) Move the power switch to the "OFF" position, then unplug the unit from the electrical
outlet.
2) Close the water supply line shut-off valve.
3) Remove all ice from the storage bin.
4) While maintaining a hold on the door, remove the hinge stop pin from hinge (B). Pull out
the bottom of the door slightly, then gently remove the door from hinge (A). See Fig. 7.
5) Remove the top panel.
6) Remove the spout.
7) Remove the upper rear panel. See
Fig. 9.
8) Remove the clamp securing the drain
Evaporator
Flange
Spout
Packing
Cutter
Extruding
Head
plug, then lower the drain hose into a
container. Remove the drain plug to
drain the water from the reservoir and
evaporator assembly.
9) After all of the water has drained,
Evaporator
Condensate Drain Pan
Drain Plug
Clamp
Drain Hose
Fig. 9
replace the drain hose, drain plug,
and drain clamp in their original
positions.
10) Remove the cutter and packing.
11) Remove the allen head cap screws
securing the extruding head and
Reservoir Hose
Upper Rear Panel
evaporator ange, then lift off.
12) Place the evaporator ange and new extruding head in place, then tighten down the
allen head cap screws.
13) Open the water supply line shut-off valve and check for water leaks. Replace the
removed parts in the reverse order of which they were removed.
14) Plug the unit back in. Move the power switch to the "ON" position.
3. Removal and Replacement of Auger
1) Move the power switch to the "OFF" position, then unplug the unit from the electrical
outlet.
2) Close the water supply line shut-off valve.
3) Remove all ice from the storage bin.
4) While maintaining a hold on the door, remove the hinge stop pin from hinge (B). Pull out
the bottom of the door slightly, then gently remove the door from hinge (A). See Fig. 7.
5) Remove the top panel.
6) Remove the spout.
7) Remove the upper rear panel. See Fig. 9.
32
8) Remove the clamp securing the drain plug, then lower the drain hose into a container.
Remove the drain plug to drain the water from the reservoir and evaporator assembly.
9) After all of the water has drained, replace the drain hose, drain plug, and drain clamp in
their original positions.
10) Remove the packing.
11) Remove the allen head cap screws securing the extruding head and evaporator ange.
Remove the evaporator ange, then grasp the cutter and carefully lift out the cutter and
extruding head. Grasp the top of the auger and carefully lift out the auger.
12) When pulling out the auger, the upper part of the mechanical seal should come out with
it. The mechanical seal consists of two parts. One moves along with the auger, and the
other is xed on the lower housing. Inspect the part of the mechanical seal that came
out with the auger. If the contact surface on the bottom of the seal is worn, cracked
or scratched, the mechanical seal may cause water leaks and both the upper and
lower parts of the mechanical seal should be replaced. Instructions for removing the
mechanical seal are located later in this procedure.
13) Remove the mechanical seal from the old auger and place it on the new auger.
14) Install the new auger. Replace the cutter, extruding head, and evaporator ange in their
correct positions.
15) Open the water supply line shut-off valve and check for water leaks. Replace the
removed parts in the reverse order of which they were removed.
16) Plug the unit back in. Move the power switch to the "ON" position.
4. Removal and Replacement of Evaporator
CAUTION
1. 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.
2. 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).
1) Move the power switch to the "OFF" position, then unplug the unit from the electrical
outlet.
2) Close the water supply line shut-off valve.
3) Remove all ice from the storage bin.
4) While maintaining a hold on the door, remove the hinge stop pin from hinge (B). Pull out
the bottom of the door slightly, then gently remove the door from hinge (A). See Fig. 7.
5) Remove the top panel.
6) Remove the spout.
7) Remove the upper and lower rear panels. See Fig. 9.
8) Remove the clamp securing the drain plug, then lower the drain hose into a container.
Remove the drain plug to drain the water from the reservoir and evaporator assembly.
33
9) Disconnect the drain hose and reservoir hose from the evaporator.
10) Remove the packing.
11) Remove the allen head cap screws securing the extruding head and evaporator ange.
Remove the evaporator ange, then grasp the cutter and carefully lift out the cutter and
extruding head. Grasp the top of the auger and carefully lift out the auger. When pulling
out the auger, the upper part of the mechanical seal should come out with it.
12) Remove the evaporator condensate drain pan.
13) Install a temporary tap-line valve on the high side, then recover the refrigerant and store
it in an approved container.
14) Disconnect the inlet and outlet tubing.
15) Remove the allen head cap screws securing the evaporator to the lower housing.
16) Lift off the evaporator.
17) Inspect the mechanical seal and O-ring prior to installing the new evaporator. The
mechanical seal consists of two parts. One moves along with the auger, and the other
is xed on the lower housing. If the contact surfaces of these two parts are worn,
cracked or scratched, the mechanical seal may cause water leaks and should be
replaced. Instructions for removing the mechanical seal and lower housing are located
later in this procedure.
18) Make sure the lower mechanical seal and the O-ring are in place, then place the
evaporator assembly in position. Secure the evaporator to the lower housing using the
allen head cap screws.
19) Replace the tap-line valve with a proper, permanent access valve.
20) Remove the drier, then place the new drier in position.
21) Braze all ttings while purging with nitrogen gas owing at a pressure of 3 to 4 PSIG.
22) 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-134a as a mixture with
pressurized air for leak testing.
23) Evacuate the system, and charge it with refrigerant. See the nameplate for the required
refrigerant charge.
24) Reattach and secure the reservoir hose, drain hose, and drain plug.
25) Install the auger assembly with the upper part of the mechanical seal attached. Replace
the cutter, extruding head, and evaporator ange in their correct positions.
26) Open the water supply line shut-off valve and check for water leaks. Replace the
removed parts in the reverse order of which they were removed.
27) Plug the unit back in. Move the power switch to the "ON" position.
34
5. Removal and Replacement of Mechanical Seal and Lower Housing
5a. Mechanical Seal
1) Move the power switch to the "OFF" position, then unplug the unit from the electrical
outlet.
2) Close the water supply line shut-off valve.
3) Remove all ice from the storage bin.
4) While maintaining a hold on the door, remove the hinge stop pin from hinge (B). Pull out
the bottom of the door slightly, then gently remove the door from hinge (A). See Fig. 7.
5) Remove the top panel.
6) Remove the spout.
7) Remove the upper rear panel. See Fig. 9.
8) Remove the clamp securing the drain plug, then lower the drain hose into a container.
Remove the drain plug to drain the water from the reservoir and evaporator assembly.
9) After all of the water has drained, replace the drain hose, drain plug, and drain clamp in
their original positions.
10) Remove the packing.
11) Remove the allen head cap screws securing the extruding head and evaporator ange.
Remove the evaporator ange, then grasp the cutter and carefully lift out the cutter and
extruding head. Grasp the top of the auger and carefully lift out the auger. When pulling
out the auger, the upper part of the mechanical seal should come out with it.
12) Remove the allen head cap screws securing the evaporator to the lower housing.
13) Raise the evaporator up to access the lower housing.
14) The mechanical seal consists of two parts. One moves along with the auger, and the
other is xed on the lower housing. If the contact surfaces of these two parts are worn,
cracked or scratched, the mechanical seal may cause water leaks and should be
replaced.
15) Remove the mechanical seal from the housing. If only replacing the mechanical seal,
proceed to step 18.
CAUTION
To help prevent water leaks, be careful not to damage the surfaces of the
5b. Lower Housing
16) Remove the O-ring and the bolts securing the lower housing to the gear motor and
O-ring or mechanical seal.
remove the housing from the gear motor. If inspection of the upper bearing inside the
extruding head (see "V.C.1. Upper Bearing Wear Check") indicates that it is out of
tolerance, replace both it and the bearing inside the lower housing.
Note: Replacing the bearing requires a bearing press adaptor. If one is not available,
replace the entire extruding head and housing.
17) Mount the lower housing onto the gear motor, then install the O-ring onto the lower
housing.
35
18) Install the lower part of the mechanical seal onto the lower housing.
19) Lower the evaporator down and secure it to the lower housing.
20) Install the auger assembly with the upper part of the mechanical seal attached. Replace
the cutter, extruding head, and evaporator ange in their correct positions.
21) Open the water supply line shut-off valve and check for water leaks. Replace the
removed parts in the reverse order of which they were removed.
22) Plug the unit back in. Move the power switch to the "ON" position.
6. Removal and Replacement of Gear Motor
Note: Hoshizaki recommends that the gear motor capacitor be replaced at the same
time as the gear motor.
1) Move the power switch to the "OFF" position, then unplug the unit from the electrical
outlet.
2) Close the water supply line shut-off valve.
3) Remove all ice from the storage bin.
4) While maintaining a hold on the door, remove the hinge stop pin from hinge (B). Pull out
the bottom of the door slightly, then gently remove the door from hinge (A). See Fig. 7.
5) Remove the top panel.
6) Remove the spout.
7) Remove the upper rear panel. See Fig. 9.
8) Remove the bolts securing the lower housing to the gear motor. Lift the evaporator up
slightly.
9) Remove the bolts securing the gear motor.
10) Disconnect the gear motor wires, then remove the gear motor.
11) Attach the spline coupling from the old gear motor to the new gear motor.
12) Replace the removed parts in the reverse order of which they were removed. Before
replacing the panels and door, open the water supply line shut-off valve and check for
water leaks.
13) Plug the unit back in. Move the power switch to the "ON" position.
D. Removal and Replacement of Fan Motor
1) Move the power switch to the "OFF" position, then unplug the unit from the electrical
outlet.
2) Remove the upper and lower rear panels, front panel, and louver. Remove the screws
securing the control box, then gently move the box out.
3) Remove the control box cover, then disconnect the fan motor wires.
4) Loosen the rear bolt on the fan motor bracket and remove the front bolt. Slide out the
fan motor bracket and fan motor.
5) Install the new fan motor onto the bracket and install the blade onto the fan motor. Install
36
the fan motor assembly into the unit. Connect the fan motor wires, then replace the
removed parts in the reverse order of which they were removed.
6) Replace the louver and panels in their correct positions.
7) Plug the unit back in. Move the power switch to the "ON" position.
E. Removal and Replacement of Water Reservoir
1) Move the power switch to the "OFF" position, then unplug the unit from the electrical
outlet.
2) Close the water supply line shut-off valve.
3) Remove the upper rear panel. See Fig. 9.
4) Remove the clamp securing the drain plug, then lower the drain hose into a container.
Remove the drain plug to drain the water from the reservoir and evaporator assembly.
5) After all of the water has drained, replace the drain hose, drain plug, and drain clamp in
their original positions.
6) Loosen the inlet tting on the top of the reservoir.
7) Disconnect the hoses from the water reservoir.
8) Remove the reservoir bracket and reservoir.
9) Remove the reservoir from the reservoir bracket.
10) Install the new reservoir onto the reservoir bracket.
11) Replace the removed parts in the reverse order of which they were removed. Before
replacing the rear panel, open the water supply line shut-off valve and check for water
leaks.
12) Plug the unit back in. Move the power switch to the "ON" position.
F. Removal and Replacement of Bin Control Thermostat Assembly
1) Move the power switch to the "OFF" position, then unplug the unit from the electrical
outlet.
2) While maintaining a hold on the door, remove the hinge stop pin from hinge (B). Pull out
the bottom of the door slightly, then gently remove the door from hinge (A). See Fig. 7.
3) Remove the top panel.
4) Remove the thermostat holder from the storage bin, then remove the bin control
thermostat bulb from the holder.
5) Disconnect the thermostat wires. Disconnect the thermostat heater wires. Remove the
bin control thermostat assembly from the unit.
6) Install the new bin control thermostat assembly in the reverse order of the removal
procedure.
7) Replace the removed parts in the reverse order of which they were removed.
8) Plug the unit back in. Move the power switch to the "ON" position.
37
VI. Cleaning and Maintenance
This icemaker must be cleaned and maintained in accordance with the instruction
manual and labels provided with the icemaker. Consult with your local distributor
about cleaning and maintenance service. To obtain the name and phone number of
your local distributor, visit www.hoshizaki.com or call Hoshizaki Technical Support at
1-800-233-1940 in the USA.
WARNING
1. Only qualied service technicians should attempt to service this icemaker.
2. CHOKING HAZARD: Ensure all components, fasteners, and thumbscrews
are securely in place after any cleaning or maintenance is done to the unit.
Make sure that none have fallen into the storage bin.
3. The storage bin is for ice use only. Do not store anything else in the storage
bin.
4. Keep the area around the icemaker clean. Dirt, dust, or insects in the unit
could cause electrical damage to the equipment or harm to individuals.
5. Do not place ngers or any other objects into the ice discharge opening.
A. Cleaning and Sanitizing Instructions
Hoshizaki recommends cleaning and sanitizing this unit at least twice a year. More
frequent cleaning and sanitizing, however, may be required in some existing water
conditions.
WARNING
1. To prevent injury to individuals and damage to the icemaker, do not use
ammonia type cleaners.
2. Carefully follow any instructions provided with the bottles of cleaning and
sanitizing solution.
3. Always wear liquid-proof gloves and goggles to prevent the cleaning and
sanitizing solutions from coming into contact with skin or eyes.
4. Do not use ice made from the cleaning and sanitizing solutions. After cleaning
and sanitizing, be careful not to leave any solution in the icemaker.
1. Cleaning Solution
IMPORTANT
For safety and maximum effectiveness, use the solution immediately after
dilution.
Dilute 1.6 . oz. (47 ml or 3.2 tbs) of Hoshizaki "Scale Away" with 1 qt (1 l) of warm water.
This is a minimum amount. Make more solution if necessary.
2. Cleaning Procedure
1) Move the power switch to the "OFF" position, then unplug the unit from the electrical
outlet.
2) Close the water supply line shut-off valve.
38
3) While maintaining a hold on the door, remove the hinge stop pin from hinge (B). Pull out
the bottom of the door slightly, then gently remove the door from hinge (A). See Fig. 10.
4) Remove the 2 screws securing the top panel, then lift it off.
5) Remove all ice from the storage bin.
6) Remove the slope from the storage bin by carefully bending it in the center and
releasing it from the 2 slope shafts.
7) Remove the scoop. Remove the 2 thumbscrews securing the scoop holder, then remove
it.
8) Remove the screws securing the upper rear panel, then remove it.
9) Remove the clamp securing the drain plug, then lower the drain hose into a container.
See Fig. 11. Remove the drain plug to drain the water from the reservoir and evaporator
assembly.
10) After all of the water has drained, replace the drain plug in its correct position.
11) Remove the reservoir cover. Pour the cleaning solution into the reservoir until the
solution starts to ow through the overow hose. Replace the reservoir cover in its
correct position.
Note: If there is excess scale on the extruding head, ll the reservoir as described
above, then use a clamp on the reservoir hose between the reservoir and
evaporator assembly to block ow. Remove the thumbscrews securing the spout,
then remove the spout. Pour additional cleaning solution over the extruding head
until the evaporator assembly is completely full.
Top Panel
Scoop
Holder
Slope
Hinge (B)
Hinge Stop Pin
Fig. 10
Hinge (A)
Spout
Packing
Extruding
Head
Drain Plug
Clamp
Drain Hose
Reservoir
Cover
Reservoir
Reservoir
Hose
Evaporator
Assembly
Overow
Hose
Upper Rear Panel
Fig. 11
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12) Allow the icemaker to sit for 10 minutes before operation. If you placed a clamp on the
reservoir hose in step 11, remove it before operation and replace the spout in its correct
position.
13) Plug the unit back in. Move the power switch to the "ON" position.
14) Allow the unit to make ice using the solution. When ice stops coming out, move the
power switch to the "OFF" position. Unplug the unit from the electrical outlet.
15) Remove the drain plug to drain any remaining solution.
16) After all of the solution has drained, replace the drain plug in its correct position.
17) Remove the reservoir cover. Using a clean container, pour water into the reservoir until
it starts to ow through the overow hose. Replace the reservoir cover in its correct
position.
18) Remove the drain plug to drain the water.
Note: If you do not sanitize the icemaker, go to step 11 in "Sanitizing Procedure - Final."
19) After all of the water has drained, replace the drain plug in its correct position.
3. Sanitizing Solution
IMPORTANT
For safety and maximum effectiveness, use the solution immediately after
dilution.
Dilute 1.25 . oz. (37 ml or 2.5 tbs) of a 5.25% sodium hypochlorite solution (chlorine
bleach) with 2.5 gallons (9.5 l) of warm water. This is a minimum amount. Make more
solution if necessary.
Using a chlorine test strip or other method, conrm that you have a concentration of
about 200 ppm.
4. Sanitizing Procedure - Initial
1) Remove the reservoir cover. Pour the sanitizing solution into the reservoir until the
solution starts to ow through the overow hose. Replace the reservoir cover in its
correct position.
2) Remove the spout and packing.
3) Pour some of the sanitizing solution into a separate, clean container. Use this sanitizing
solution and a clean cloth to wipe down the slope, scoop, scoop holder, spout, and
packing.
4) Rinse the parts thoroughly with clean water.
5) Replace the packing and spout in their correct positions.
6) Make sure at least 10 minutes have elapsed since you poured the sanitizing solution
into the reservoir, then plug the unit back in. Move the power switch to the "ON"
position.
7) Allow the unit to make ice using the solution. When ice stops coming out, move the
power switch to the "OFF" position. Unplug the unit from the electrical outlet.
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5. Sanitizing Procedure - Final
1) Remove the drain plug to drain any remaining solution.
2) After all of the solution has drained, replace the drain plug in its correct position.
3) Remove the reservoir cover. Pour the sanitizing solution into the reservoir until the
solution starts to ow through the overow hose.
4) Allow the icemaker to sit for 10 minutes before operation.
5) Plug the unit back in. Move the power switch to the "ON" position.
6) Allow the unit to make ice using the solution. When ice stops coming out, move the
power switch to the "OFF" position. Unplug the unit from the electrical outlet.
7) Remove the drain plug to drain any remaining solution.
8) After all of the solution has drained, replace the drain plug in its correct position.
9) Remove the reservoir cover. Using a clean container, pour water into the reservoir until
it starts to ow through the overow hose. Replace the reservoir cover in its correct
position.
10) Remove the drain plug to drain the water.
11) After all of the water has drained, replace the drain hose, drain plug, drain clamp and
all other removed parts in their original and correct positions. WARNING! CHOKING
HAZARD: Ensure all components, fasteners, and thumbscrews are securely in place.
Make sure that none have fallen into the storage bin.
12) Open the water supply line shut-off valve. Check for leaks.
13) Plug the unit back in. Move the power switch to the "ON" position and allow the
icemaker to run.
14) After 30 minutes, move the power switch to the "OFF" position. Unplug the unit.
15) Pour warm water into the storage bin to melt all of the ice, then clean the storage bin
liner, door liner, and door gasket with a neutral cleaner. Rinse thoroughly after cleaning.
16) Plug the unit back in. Move the power switch to the "ON" position to start the automatic
icemaking process.
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B. Maintenance
The maintenance schedule below is a guideline. More frequent maintenance may be
required depending on water quality, the icemaker's environment, and local sanitation
regulations.
WARNING
1. Only qualied service technicians should attempt to service this icemaker.
2. Move the power switch to the "OFF" position and unplug the unit from the
electrical outlet before servicing.
Maintenance Schedule
Frequency Area Task
Weekly Scoop Clean the scoop using a neutral cleaner. Rinse thoroughly after cleaning.
Monthly External Water
Filters
Icemaker Exterior Wipe down with clean, soft cloth. Use a damp cloth containing a neutral
Every 6
Months
Icemaker and
Storage Bin
Evaporator
Condensate Drain
Pan and Gear
Motor Drain Pan
Check for proper pressure and change if necessary.
cleaner to wipe off oil or dirt build up. Clean any chlorine staining (rust
colored spots) using a non-abrasive cleaner like Zud or Bon Ami.
Clean and sanitize per the cleaning and sanitizing instructions provided in
this manual. See "III. A. Cleaning and Sanitizing Instructions."
Wipe down with clean cloth
andwarm water.
Evaporator
Condensate
Drain Pan
Gear Motor
Drain Pan
Storage Bin Drain Maintain as outlined in "III.B.1. Storage Bin Drain."
Yearly Water Supply Inlet Close the icemaker water supply line shut-off valve and drain the water
system. Clean the water supply inlet screen.
Condenser Inspect. Clean if necessary. See "III.B.2. Condenser."
Water Hoses Inspect the water hoses and clean/replace if necessary.
After
3 Years,
then Yearly
Upper Bearing
(extruding head)
Upper Bearing
(extruding head);
Lower Bearing
and O-Ring
(lower housing);
Mechanical
Seal; Evaporator
Cylinder; Auger
Check for wear using .02" round stock or pin gauge. Replace both upper
bearing and lower bearing if wear exceeds factory recommendations. See
the Service Manual for details.
Inspect. Replace both upper bearing and lower bearing if wear exceeds
factory recommendations. Replace the mechanical seal if the seal's contact
surfaces are worn, cracked, or scratched.
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1. Storage Bin Drain
In some conditions, slime may build up inside the storage bin drain and prevent water
from draining properly. To prevent this buildup, perform the following procedure once
every 3 months or as often as necessary for conditions.
1) Move the power switch to the "OFF" position.
2) Remove all ice from the storage bin.
3) Mix a batch of sanitizing solution by diluting 1.25 . oz. (37 ml or 2.5 tbs) of a
5.25% sodium hypochlorite solution (chlorine bleach) with 2.5 gallons (9.5 l) of warm
water. Using a chlorine test strip or other method, conrm that you have a concentration
of about 200 ppm.
4) Slowly pour the sanitizing solution into the storage bin.
5) After all of the solution has drained, clean the storage bin liner with a neutral cleaner.
Rinse thoroughly with clean water.
6) Move the power switch to the "ON" position to start the automatic icemaking process.
2. Condenser
Check the condenser once a year, and clean if required by following the steps below.
More frequent cleaning may be required depending on location.
WARNING
1. Move the power switch to the "OFF" position and unplug the unit from the
electrical outlet before cleaning the condenser.
2. Condenser ns are sharp. Use care when cleaning.
1) Move the power switch to the "OFF" position, then unplug the unit from the electrical
outlet.
2) Remove the 2 screws securing the front
Condenser
Front Panel
panel, then remove the panel. See Fig. 12.
3) Remove the 2 screws securing the louver,
Screws
then remove the louver.
4) Use a brush attachment on a vacuum
cleaner to gently clean the condenser ns.
Do not use too much force, otherwise the
ns could be damaged.
Louver
Screws
5) Replace the louver and front panel in their
correct positions. Ensure that the screws
Fig. 12
are securely in place.
6) Plug the unit back in. Move the power switch to the "ON" position to start the automatic
icemaking process.
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C. Preparing the Icemaker for Long Storage
CAUTION
When storing the icemaker for an extended time or in sub-freezing
temperatures, follow the instructions below to prevent damage.
When the icemaker is not used for two or three days under normal conditions,
it is sufficient to move the power switch to the "OFF" position. When storing
the icemaker for an extended time or in sub-freezing temperatures, follow the
instructions below.
1) Move the power switch to the "OFF" position, then unplug the unit from the electrical
outlet.
2) Close the water supply line shut-off valve.
3) While maintaining a hold on the door, remove the hinge stop pin from hinge (B). Pull out
the bottom of the door slightly, then gently remove the door from hinge (A). See Fig. 10.
4) Remove the 2 screws securing the top panel, then lift it off.
5) Remove all ice from the storage bin.
6) Remove the screws securing the upper rear panel, then remove it.
7) Remove the clamp securing the drain plug, then lower the drain hose into a container.
See Fig. 11. Remove the drain plug to drain the water from the reservoir and evaporator
assembly.
8) After all of the water has drained, replace the drain hose, drain plug, drain clamp and all
other removed parts in their original and correct positions.
9) Open the water supply line drain valve.
10) From the water supply line drain valve, blow the water supply line out using compressed
air or carbon dioxide.
11) Close the water supply line drain valve.
12) Clean the storage bin by using a neutral cleaner. Rinse thoroughly after cleaning.
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