Hoshizaki America, Inc.
Hoshizaki
Stackable Crescent Cuber
Models
KM-1301SAH/3
KM-1301SWH/3
KM-1301SRH/3
SERVICE MANUAL
“A Superior Degree
of Reliability”
™
Number: 73169
Issued:1-21-2009
Revised: 8-6-2009
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IMPORTANT
This manual should be read carefully before the icemaker is serviced or
maintenance operations are performed. Only qualified 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
A. Icemaker....................................................................................................................... 7
1. KM-1301SAH (air-cooled)....................................................................................... 7
ꢀ. KM-1301SAH3 (air-cooled)..................................................................................... 8
3. KM-1301SWH (water-cooled) ................................................................................ 9
B. Condenser Unit........................................................................................................... 13
1. URC-14F............................................................................................................... 13
1. KM-1301SAH, KM-1301SAH3 (air-cooled)........................................................... 15
B. Sequence of Operation............................................................................................... 18
d) Pump-Out Cycle ............................................................................................. 19
e) Harvest Cycle ................................................................................................. 19
3
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f) Factory Use (S4 dip switch 8)........................................................................... ꢀ7
h) Float Switch Control (S5 dip switch 1)............................................................ ꢀ8
D. Bin Control.................................................................................................................. ꢀ9
F. Thermistor................................................................................................................... ꢀ9
1. KM-1301SAH, KM-1301SAH3 (air-cooled)........................................................... 30
b) KM-1301SWH (water-cooled).......................................................................... 34
1. KM-1301SAH (air-cooled)..................................................................................... 43
ꢀ. KM-1301SAH3 (air-cooled)................................................................................... 44
3. KM-1301SWH (water-cooled) .............................................................................. 45
4. KM-1301SWH3 (water-cooled) ............................................................................ 46
A. Diagnostic Procedure ................................................................................................ 49
4
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B. Removal and Replacement of Compressor................................................................ 67
E. Removal and Replacement of Evaporator.................................................................. 70
F. Removal and Replacement of Air-Cooled Condenser................................................ 71
J. Adjustment of Water Regulating Valve (water-cooled model) .................................... 75
N. Removal and Replacement of Inlet Water Valve........................................................ 77
B. Maintenance Instructions............................................................................................ 83
5
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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
IMPORTANT
Indicates a situation which could result in damage to the unit.
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
eventual damage caused by improper, incorrect, and unreasonable use.
To reduce the risk of death, electric shock, serious injury, or fire, follow
basic precautions including the following:
• Electrical connection must be hard-wired and must meet national, state, and
local electrical code requirements. Failure to meet these code requirements
could result in death, electric shock, serious injury, fire, or severe damage to
equipment.
• 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 fire.
• THIS UNIT MUST BE GROUNDED. Failure to properly ground this unit
could result in death or serious injury.
• This unit should be disassembled or repaired only by qualified service
personnel to reduce the risk of electric shock, injury, or fire.
• Do not make any alterations to the unit. Alterations could result in electric
shock, injury, fire, or damage to the unit.
6
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I. Specifications
A. Icemaker
1. KM-1301SAH (air-cooled)
AC SUPPLY VOLTAGE
AMPERAGE
208-230/60/1 (3 wire with neutral for 115V)
12.4 A ( 5 Min. Freeze AT 104°F / WT 80°F)
MINIMUM CIRCUIT AMPACITY
MAXIMUM FUSE SIZE
APPROXIMATE ICE PRODUCTION
PER 24 HR.
20 A
20 A
Ambient
WATER TEMP. (°F)
70
Temp.(°F)
50
90
lbs./day ( kg/day )
Reference without *marks
70
80
90
100
*1329 (603)
1292 (586)
1281 (581)
1253 (568)
1281 (581)
1217 (552)
*1164 (528)
1140 (517)
1188 (539)
1109 (503)
1060 (481)
965 (438)
SHAPE OF ICE
Crescent Cube
ICE PRODUCTION PER CYCLE
APPROXIMATE STORAGE CAPACITY
ELECTRIC & WATER CONSUMPTION
ELECTRIC W (kWH/100 lbs.)
WATER gal./24HR (gal./100 lbs.)
CEC/CEE TIER LEVEL
29.8 lbs. (13.5 kg) 1440pcs.
N/A
90/70°F
2180(4.5)
183(15.7)
3
70/50°F
2160(3.9)
605(45.5)
ENERGY STAR
YES
EXTERIOR DIMENSIONS (WxDxH)
EXTERIOR FINISH
WEIGHT
CONNECTIONS - ELECTRIC
- WATER SUPPLY
48" x 27-3/8" x 27-3/8" (1219 x 695 x 695 mm)
Stainless Steel, Galvanized Steel (Rear)
Net 275 lbs. (125 kg), Shipping 315 lbs. (143 kg)
Permanent - Connection
Inlet
1/2" FPT
- DRAIN
Outlet
3/4" FPT
- CONDENSATE DRAIN
CUBE CONTROL SYSTEM
HARVESTING CONTROL SYSTEM
ICE MAKING WATER CONTROL
COOLING WATER CONTROL
BIN CONTROL SYSTEM
COMPRESSOR
3/8" OD Tube
Float Switch
Hot Gas and Water, Thermistor and Timer
Timer Controlled. Overflow Pipe
N/A
Thermostat
Hermetic, Model CS14K6E-PFV-237
Air-Cooled , Fin and tube type
Vertical type, Stainless Steel and Copper
Thermostatic Expansion Valve
R404A, 3 lb. 15.5 oz. (1800g)
High 467PSIG, Low 230PSIG
High Voltage Cut-out ( Internal )
Auto-reset Overload Protector ( Internal )
Auto-reset High Pressure Control Switch
Float Switch
CONDENSER
EVAPORATOR
REFRIGERANT CONTROL
REFRIGERANT CHARGE
DESIGN PRESSURE
P.C. BOARD CIRCUIT PROTECTION
COMPRESSOR PROTECTION
REFRIGERANT CIRCUIT PROTECTION
LOW WATER PROTECTION
ACCESSORIES -SUPPLIED
-REQUIRED
N/A
Ice Storage Bin
OPERATING CONDITIONS
VOLTAGE RANGE
AMBIENT TEMP.
187 - 253 V
45 -100° F
WATER SUPPLY TEMP.
WATER SUPPLY PRESSURE
45 - 90° F
10 - 113 PSIG
Note: We reserve the right to make changes in specifications and design without prior
notice.
7
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2. KM-1301SAH3 (air-cooled)
AC SUPPLY VOLTAGE
AMPERAGE
208-230/60/3
9.5 A ( 5 Min. Freeze AT 104°F / WT 80°F)
MINIMUM CIRCUIT AMPACITY
MAXIMUM FUSE SIZE
APPROXIMATE ICE PRODUCTION
PER 24 HR.
20 A
20 A
Ambient
WATER TEMP. (°F)
Temp.(°F)
50
70
90
lbs./day ( kg/day )
Reference without *marks
70
80
90
100
*1298 (589)
1267 (575)
1257 (570)
1225 (556)
1257 (570)
1204 (546)
*1159 (526)
1133 (514)
1162 (527)
1086 (493)
1049 (476)
947 (430)
SHAPE OF ICE
Crescent Cube
ICE PRODUCTION PER CYCLE
APPROXIMATE STORAGE CAPACITY
ELECTRIC & WATER CONSUMPTION
ELECTRIC W (kWH/100 lbs.)
WATER gal./24HR (gal./100 lbs.)
CEC/CEE TIER LEVEL
30.4 lbs. (13.8 kg) 1440pcs.
N/A
90/70°F
2220(4.6)
181(15.6)
3
70/50°F
2090(3.9)
511(39.4)
ENERGY STAR
YES
EXTERIOR DIMENSIONS (WxDxH)
EXTERIOR FINISH
WEIGHT
CONNECTIONS - ELECTRIC
- WATER SUPPLY
48" x 27-3/8" x 27-3/8" (1219 x 695 x 695 mm)
Stainless Steel, Galvanized Steel (Rear)
Net 275 lbs. (125 kg), Shipping 315 lbs. (143 kg)
Permanent - Connection
Inlet
1/2" FPT
- DRAIN
Outlet
3/4" FPT
- CONDENSATE DRAIN
CUBE CONTROL SYSTEM
HARVESTING CONTROL SYSTEM
ICE MAKING WATER CONTROL
COOLING WATER CONTROL
BIN CONTROL SYSTEM
COMPRESSOR
3/8" OD Tube
Float Switch
Hot Gas and Water, Thermistor and Timer
Timer Controlled. Overflow Pipe
N/A
Thermostat
Hermetic, Model CS14K6E-TF5-237
Air-Cooled, Fin and tube type
Vertical type, Stainless Steel and Copper
Thermostatic Expansion Valve
R404A, 3 lb. 15.5 oz. (1800g)
High 467PSIG, Low 230PSIG
High Voltage Cut-out ( Internal )
Auto-reset Overload Protector ( Internal )
Auto-reset High Pressure Control Switch
Float Switch
CONDENSER
EVAPORATOR
REFRIGERANT CONTROL
REFRIGERANT CHARGE
DESIGN PRESSURE
P.C. BOARD CIRCUIT PROTECTION
COMPRESSOR PROTECTION
REFRIGERANT CIRCUIT PROTECTION
LOW WATER PROTECTION
ACCESSORIES -SUPPLIED
-REQUIRED
N/A
Ice Storage Bin
OPERATING CONDITIONS
VOLTAGE RANGE
AMBIENT TEMP.
187 - 253 V
45 -100° F
WATER SUPPLY TEMP.
WATER SUPPLY PRESSURE
45 - 90° F
10 - 113 PSIG
Note: We reserve the right to make changes in specifications and design without prior
notice.
8
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3. KM-1301SWH (water-cooled)
AC SUPPLY VOLTAGE
AMPERAGE
208-230/60/1 (3 wire with neutral for 115V)
8.2 A ( 5 Min. Freeze AT 104°F / WT 80°F)
MINIMUM CIRCUIT AMPACITY
MAXIMUM FUSE SIZE
APPROXIMATE ICE PRODUCTION
PER 24 HR.
20 A
20 A
Ambient
WATER TEMP. (°F)
Temp.(°F)
50
70
90
lbs./day ( kg/day )
Reference without *marks
70
80
90
100
*1318 (598)
1319 (598)
1319 (599)
1281 (581)
1319 (599)
1321 (599)
*1323 (600)
1301 (590)
1249 (567)
1211 (549)
1228 (557)
1141 (518)
SHAPE OF ICE
Crescent Cube
ICE PRODUCTION PER CYCLE
APPROXIMATE STORAGE CAPACITY
ELECTRIC & WATER CONSUMPTION
ELECTRIC W (kWH/100 lbs.)
WATER gal./24HR (gal./100 lbs.)
WATER COOLED CONDENSER
gal./24HR (gal./100 lbs.)
CEC/CEE TIER LEVEL
31 lbs. (14.1 kg) 1440pcs.
N/A
90/70°F
1760(3.2)
257(19.4)
1561(118)
70/50°F
1740(3.2)
546(41.4)
861(65)
3
ENERGY STAR
N/A
EXTERIOR DIMENSIONS (WxDxH)
EXTERIOR FINISH
WEIGHT
CONNECTIONS - ELECTRIC
- WATER SUPPLY
48" x 27-3/8" x 27-3/8" (1219 x 695 x 695 mm)
Stainless Steel, Galvanized Steel (Rear)
Net 265 lbs. (120 kg), Shipping 315 lbs. (143 kg)
Permanent - Connection
Inlet
1/2" FPT
Cond. Inlet
1/2" FPT
- DRAIN
Outlet
3/4" FPT
Cond. Outlet 3/8" FPT
- CONDENSATE DRAIN
CUBE CONTROL SYSTEM
HARVESTING CONTROL SYSTEM
ICE MAKING WATER CONTROL
COOLING WATER CONTROL
BIN CONTROL SYSTEM
COMPRESSOR
3/8" OD Tube
Float Switch
Hot Gas and Water, Thermistor and Timer
Timer Controlled. Overflow Pipe
Water Regulator
Thermostat
Hermetic, Model CS12K6E-PFV-237
Water-cooled, Tube in tube type
Vertical type, Stainless Steel and Copper
Thermostatic Expansion Valve
R404A, 2 lb. 8.2 oz. (1140g)
High 427PSIG, Low 230PSIG
High Voltage Cut-out ( Internal )
Auto-reset Overload Protector ( Internal )
Auto-reset High Pressure Control Switch
Float Switch
CONDENSER
EVAPORATOR
REFRIGERANT CONTROL
REFRIGERANT CHARGE
DESIGN PRESSURE
P.C. BOARD CIRCUIT PROTECTION
COMPRESSOR PROTECTION
REFRIGERANT CIRCUIT PROTECTION
LOW WATER PROTECTION
ACCESSORIES -SUPPLIED
-REQUIRED
N/A
Ice Storage Bin
OPERATING CONDITIONS
VOLTAGE RANGE
AMBIENT TEMP.
187 - 253 V
45 -100° F
WATER SUPPLY TEMP.
WATER SUPPLY PRESSURE
45 - 90° F
10 - 113 PSIG
Note: We reserve the right to make changes in specifications and design without prior
notice.
9
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4. KM-1301SWH3 (water-cooled)
AC SUPPLY VOLTAGE
AMPERAGE
208-230/60/3
6.1 A ( 5 Min. Freeze AT 104°F / WT 80°F)
MINIMUM CIRCUIT AMPACITY
MAXIMUM FUSE SIZE
APPROXIMATE ICE PRODUCTION
PER 24 HR.
20 A
20 A
Ambient
WATER TEMP. (°F)
Temp.(°F)
50
70
90
lbs./day ( kg/day )
Reference without *marks
70
80
90
100
*1333 (605)
1326 (601)
1323 (600)
1286 (584)
1323 (600)
1311 (594)
*1300 (590)
1277 (579)
1246 (565)
1198 (544)
1201 (545)
1110 (503)
SHAPE OF ICE
Crescent Cube
ICE PRODUCTION PER CYCLE
APPROXIMATE STORAGE CAPACITY
ELECTRIC & WATER CONSUMPTION
ELECTRIC W (kWH/100 lbs.)
WATER gal./24HR (gal./100 lbs.)
WATER COOLED CONDENSER
gal./24HR (gal./100 lbs.)
CEC/CEE TIER LEVEL
32.2 lbs. (14.6 kg) 1440pcs.
N/A
90/70°F
1840(3.4)
248(19.1)
1547(119)
70/50°F
1770(3.2)
557(41.8)
857(64)
3
ENERGY STAR
N/A
EXTERIOR DIMENSIONS (WxDxH)
EXTERIOR FINISH
WEIGHT
CONNECTIONS - ELECTRIC
- WATER SUPPLY
48" x 27-3/8" x 27-3/8" (1219 x 695 x 695 mm)
Stainless Steel, Galvanized Steel (Rear)
Net 265 lbs. (120 kg), Shipping 315 lbs. (143 kg)
Permanent - Connection
Inlet
1/2" FPT
Cond. Inlet
1/2" FPT
- DRAIN
Outlet
3/4" FPT
Cond. Outlet 3/8" FPT
- CONDENSATE DRAIN
CUBE CONTROL SYSTEM
HARVESTING CONTROL SYSTEM
ICE MAKING WATER CONTROL
COOLING WATER CONTROL
BIN CONTROL SYSTEM
COMPRESSOR
3/8" OD Tube
Float Switch
Hot Gas and Water, Thermistor and Timer
Timer Controlled. Overflow Pipe
Water Regulator
Thermostat
Hermetic, Model CS12K6E-TF5-237
Water-cooled, Tube in tube type
Vertical type, Stainless Steel and Copper
Thermostatic Expansion Valve
R404A, 2 lb. 8.2 oz. (1140g)
High 427PSIG, Low 230PSIG
High Voltage Cut-out ( Internal )
Auto-reset Overload Protector ( Internal )
Auto-reset High Pressure Control Switch
Float Switch
CONDENSER
EVAPORATOR
REFRIGERANT CONTROL
REFRIGERANT CHARGE
DESIGN PRESSURE
P.C. BOARD CIRCUIT PROTECTION
COMPRESSOR PROTECTION
REFRIGERANT CIRCUIT PROTECTION
LOW WATER PROTECTION
ACCESSORIES -SUPPLIED
-REQUIRED
N/A
Ice Storage Bin
OPERATING CONDITIONS
VOLTAGE RANGE
AMBIENT TEMP.
187 - 253 V
45 -100° F
WATER SUPPLY TEMP.
WATER SUPPLY PRESSURE
45 - 90° F
10 - 113 PSIG
Note: We reserve the right to make changes in specifications and design without prior
notice.
10
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5. KM-1301SRH (remote air-cooled)
AC SUPPLY VOLTAGE
AMPERAGE
208-230/60/1 (3 wire with neutral for 115V)
13.5A ( 5 Min. Freeze AT 104°F / WT 80°F)
MINIMUM CIRCUIT AMPACITY
MAXIMUM FUSE SIZE
20 A
20 A
APPROXIMATE ICE PRODUCTION
Ambient
WATER TEMP. (°F)
PER 24 HR.
Temp.(°F)
50
70
90
lbs./day ( kg/day )
Reference without *marks
70
80
90
100
*1353 (614)
1324 (600)
1315 (596)
1281 (581)
1315 (596)
1264 (573)
*1222 (554)
1196 (542)
1219 (553)
1144 (519)
1110 (504)
1008 (457)
SHAPE OF ICE
Crescent Cube
ICE PRODUCTION PER CYCLE
APPROXIMATE STORAGE CAPACITY
ELECTRIC & WATER CONSUMPTION
ELECTRIC W (kWH/100 lbs.)
WATER gal./24HR (gal./100 lbs.)
CEC/CEE TIER LEVEL
ENERGY STAR
31.1 lbs. (14.1 kg) 1440pcs.
N/A
90/70°F
2090(4.1)
203(16.6)
3
70/50°F
2010(3.6)
479(35.4)
YES
EXTERIOR DIMENSIONS (WxDxH)
EXTERIOR FINISH
WEIGHT
CONNECTIONS - ELECTRIC
- WATER SUPPLY
48" x 27-3/8" x 27-3/8" (1219 x 695 x 695 mm)
Stainless Steel, Galvanized Steel (Rear)
Net 255 lbs. (116 kg), Shipping 315 lbs. (143 kg)
Permanent - Connection
Inlet
1/2" FPT
- DRAIN
Outlet
3/4" FPT
- CONDENSATE DRAIN
CUBE CONTROL SYSTEM
HARVESTING CONTROL SYSTEM
ICE MAKING WATER CONTROL
COOLING WATER CONTROL
BIN CONTROL SYSTEM
COMPRESSOR
CONDENSER
EVAPORATOR
REFRIGERANT CONTROL
3/8" OD Tube
Float Switch
Hot Gas and Water, Thermistor and Timer
Timer Controlled. Overflow Pipe
N/A
Thermostat
Hermetic, Model CS12K6E-PFV-279
Air-Cooled Remote, Condenser Unit URC-14F
Vertical type, Stainless Steel and Copper
Thermostatic Expansion Valve
Condensing Pressure Regulator on URC-14F
R404A, 10 lbs. 5.8 oz. (4700g)
(Icemaker 5 lbs. 15.2 oz. Cond. Unit 4 lbs. 6.5 oz.)
High 467PSIG, Low 230PSIG
High Voltage Cut-out ( Internal )
Auto-reset Overload Protector ( Internal )
Auto-reset High Pressure Control Switch
Float Switch
REFRIGERANT CHARGE
DESIGN PRESSURE
P.C. BOARD CIRCUIT PROTECTION
COMPRESSOR PROTECTION
REFRIGERANT CIRCUIT PROTECTION
LOW WATER PROTECTION
ACCESSORIES -SUPPLIED
-REQUIRED
N/A
Ice Storage Bin, Remote Condenser Unit
VOLTAGE RANGE
OPERATING CONDITIONS
187 - 253 V
45 -100° F
45 - 90° F
AMBIENT TEMP.
WATER SUPPLY TEMP.
WATER SUPPLY PRESSURE
10 - 113 PSIG
Note: We reserve the right to make changes in specifications and design without prior
notice.
11
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6. KM-1301SRH3 (remote air-cooled)
AC SUPPLY VOLTAGE
AMPERAGE
208-230/60/3
10.7A ( 5 Min. Freeze AT 104°F / WT 80°F)
MINIMUM CIRCUIT AMPACITY
MAXIMUM FUSE SIZE
APPROXIMATE ICE PRODUCTION
PER 24 HR.
20 A
20 A
Ambient
WATER TEMP. (°F)
Temp.(°F)
50
70
90
lbs./day ( kg/day )
Reference without *marks
70
80
90
100
*1339 (607)
1307 (593)
1297 (589)
1266 (574)
1297 (589)
1243 (564)
*1197 (543)
1171 (531)
1203 (546)
1127 (511)
1088 (494)
988 (448)
SHAPE OF ICE
Crescent Cube
ICE PRODUCTION PER CYCLE
APPROXIMATE STORAGE CAPACITY
ELECTRIC & WATER CONSUMPTION
ELECTRIC W (kWH/100 lbs.)
WATER gal./24HR (gal./100 lbs.)
CEC/CEE TIER LEVEL
ENERGY STAR
30.7 lbs. (13.9 kg) 1440pcs.
N/A
90/70°F
2140(4.3)
192(16.0)
3
70/50°F
2090(3.8)
463(34.6)
YES
EXTERIOR DIMENSIONS (WxDxH)
EXTERIOR FINISH
WEIGHT
CONNECTIONS - ELECTRIC
- WATER SUPPLY
48" x 27-3/8" x 27-3/8" (1219 x 695 x 695 mm)
Stainless Steel, Galvanized Steel (Rear)
Net 255 lbs. (116 kg), Shipping 315 lbs. (143 kg)
Permanent - Connection
Inlet
1/2" FPT
- DRAIN
Outlet
3/4" FPT
- CONDENSATE DRAIN
CUBE CONTROL SYSTEM
HARVESTING CONTROL SYSTEM
ICE MAKING WATER CONTROL
COOLING WATER CONTROL
BIN CONTROL SYSTEM
COMPRESSOR
CONDENSER
EVAPORATOR
REFRIGERANT CONTROL
3/8" OD Tube
Float Switch
Hot Gas and Water, Thermistor and Timer
Timer Controlled. Overflow Pipe
N/A
Thermostat
Hermetic, Model CS12K6E-TF5-279
Air-Cooled Remote, Condenser Unit URC-14F
Vertical type, Stainless Steel and Copper
Thermostatic Expansion Valve
Condensing Pressure Regulator on URC-14F
R404A, 10 lbs. 5.8 oz. (4700g)
(Icemaker 5 lbs. 15.2 oz. Cond. Unit 4 lbs. 6.5 oz.)
High 467PSIG, Low 230PSIG
High Voltage Cut-out ( Internal )
Auto-reset Overload Protector ( Internal )
Auto-reset High Pressure Control Switch
Float Switch
REFRIGERANT CHARGE
DESIGN PRESSURE
P.C. BOARD CIRCUIT PROTECTION
COMPRESSOR PROTECTION
REFRIGERANT CIRCUIT PROTECTION
LOW WATER PROTECTION
ACCESSORIES -SUPPLIED
-REQUIRED
N/A
Ice Storage Bin, Remote Condenser Unit
VOLTAGE RANGE
OPERATING CONDITIONS
187 - 253 V
45 -100° F
45 - 90° F
AMBIENT TEMP.
WATER SUPPLY TEMP.
WATER SUPPLY PRESSURE
10 - 113 PSIG
Note: We reserve the right to make changes in specifications and design without prior
notice.
1ꢀ
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SPECIFICATIONS
MODEL: URC-14F
AC SUPPLY VOLTAGE
FAN MOTOR
115/60/1 (Connection to Icemaker)
115 V Total 2.6FLA
130W
EXTERIOR DIMENSIONS (WxDxH)
DIMENSIONS INCLUDING LEGS (WxDxH)
EXTERIOR FINISH
35-11/16" x 15-11/16" x 21-15/16" (907.2 x 398 x 557.8 mm)
37-13/16" x 18-1/8" x 36-15/16" (960 x 460 x 937.8 mm)
Galvanized Steel
WEIGHT
Net 80 lbs. ( 36 kg )
Shipping 87 lbs. ( 39 kg )
CONNECTIONS - ELECTRIC
- REFRIGERANT
Permanent - Connection
Discharge Line 1-1/16"-12 UNF Fitting (#10 AEROQUIP)
Liquid Line 5/8"-18 UNF Fitting (#6 AEROQUIP)
CONDENSER
Air-cooled, Fin and tube type
Thermal Protection
FAN MOTOR PROTECTION
REFRIGERANT CONTROL
REFRIGERANT CHARGE
DESIGN PRESSURE
Condensing Pressure Regulator
R-404A
4 lb. 7 oz.
(2000g)
High 467 PSIG
VOLTAGE RANGE
AMBIENT TEMP.
Leg
OPERATING CONDITIONS
104 ~ 127 V
-20 ~ 122 °F
ACCESSORIES -SUPPLIED
2 pcs
8 pcs
8 pcs
Hex. Head Bolt w/Washer 8 x 16
Hex. Nut
8
14
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II. General Information
A. Construction
1. KM-1301SAH, KM-1301SAH3 (air-cooled)
Spray Tubes
Low-Side Service Valve
High-Side Service Valve
Inlet Water Valve
Evaporator Assembly
Expansion Valves
Water Supply Inlet
Junction Box
Hot Gas Valve
Check Valves
Cleaning Valve
Air-Cooled
Condenser
Control Box
Fan Blade
Check Valve
(water)
Water Pump
Fan Motor
Float Switch
Compressor
Drier
Liquid Line Valve
Bin Control Thermostat
Transformer Box
(KM-1301SAH3)
Control Switch
15
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2. KM-1301SWH, KM-1301SWH3 (water-cooled)
Spray Tubes
Low-Side Service Valve
Inlet Water Valve
Evaporator Assembly
High-Side Service Valve
Expansion Valves
Water Supply Inlet
Junction Box
Hot Gas Valve
Check Valves
Water-Cooled
Condenser
Cleaning Valve
Check Valve
(water)
Water Pump
Water Regulating
Valve
Float Switch
Compressor
Bin Control Thermostat
Drier
Control Box
Liquid Line Valve
Control Switch
Transformer Box
(KM-1301SWH3)
16
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3. KM-1301SRH, KM-1301SRH3 (remote air-cooled)
Low-Side Service Valve
Spray Tubes
Inlet Water Valve
High-Side Service Valve
High-Side Liquid Service Valve
Evaporator Assembly
Water Supply Inlet
Hot Gas Valve
Junction Boxes
Check Valves
Cleaning Valve
Expansion Valves
Receiver Tank
Check Valve
(water)
Water Pump
Float Switch
Compressor
Control Box
Access Valve
Bin Control Thermostat
Control Switch
Drier
Transformer Box
(KM-1301SRH3)
Liquid Line Valve
17
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B. Sequence of Operation
IMPORTANT
This unit utilizes a thermostatic bin control. For operation, the K4 jumper
(4A4883G01) must be in place on the control board RED K4 connector.
1. Sequence Cycles and Shutdown
The steps in the sequence are as outlined below. When power is supplied, CB red
"POWER OK" LED and green "BC CLOSED" LED come on. The green "BC CLOSED"
LED is on continuously when the K4 jumper is in place. If CB yellow "BC OPEN" LED is
on, check that CB has the K4 jumper in place on CB RED K4 connector. This unit will not
operate unless the K4 jumper is in place. There is a 5-second delay before startup. Note
that the order of the component LEDs from the outer edge of CB is 1, 4, 3, ꢀ.
a) 1-Minute Fill Cycle
LED 4 is on. WV and Xꢀ relay (auxiliary code T-0 and U-0), X11 relay (auxiliary code
U-1 and later) energize and the 1-minute fill cycle begins. After 1 minute, CB checks for
a closed F/S. If F/S is closed, the harvest cycle begins. If not, WV remains energized
through additional 1-minute fill cycles until water fills the tank and closes F/S. This
serves as a low water safety to protect PM.
b) Initial Harvest Cycle
LEDs 1, 4, and ꢀ are on. WV and Xꢀ relay (auxiliary code T-0, U-0), X11 relay (auxiliary
code U-1 and later) remain energized, HGV, X1 relay (auxiliary code T-0, U-0),
X10 relay (auxiliary code U-1 and later), Comp, and FMR energize. CB monitors the
warming of the evaporator via the thermistor located on the suction line. When the
thermistor reaches 48°F (9°C), CB reads a 3.9 kΩ signal from the thermistor and turns
harvest termination over to the harvest timer (S4 dip switch 1 & ꢀ). The harvest timer
has settings of 60, 90, 1ꢀ0, and 180 seconds. For details, see "II.C.3.b) Harvest Timer
(S4 dip switch 1 & ꢀ)." WV is energized during harvest for a maximum of 6 minutes or
the length of harvest minus 0 or 50 seconds (harvest pump timer (S4 dip switch 7)),
whichever is shorter. CAUTION! Do not adjust S4 dip switch 7 out of the factory
default position on this model. Adjustment outside of the factory default position
may result in damage to the icemaker. For details, see "II.C.3.e) Harvest Pump Timer
(S4 dip switch 7)." LED 4 goes off when WV and Xꢀ relay (auxiliary code T-0, U-0),
X11 relay (auxiliary code U-1 and later) de-energize. LED 3 comes on and PM energizes
and runs for the last 0 or 50 seconds of harvest depending on S4 dip switch 7 setting.
This circulates water over the evaporator for the last 0 or 50 seconds of harvest. PM
is energized through the #5 pin (DBu wire) on the CB K1 ten-pin connector and the
X1 relay (auxiliary code T-0, U-0), X10 relay (auxiliary code U-1 and later). When the
harvest timer expires, the harvest cycle is complete. CB checks the position of F/S and
proceeds to the freeze cycle if it is closed or calls for a 1-minute fill cycle if it is open. The
minimum total time allowed by CB for a complete harvest cycle is ꢀ minutes.
c) Freeze Cycle
LED 1 is on. Comp and FMR remain energized, PM energizes or remains energized
depending on harvest pump timer (S4 dip switch 7) setting. FM and LLV energize.
HGV and X1 relay (auxiliary code T-0, U-0), X10 relay (auxiliary code U-1 and later)
18
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de-energize. For the first 5 minutes, CB will not accept a signal from F/S. This minimum
5-minute freeze time is short cycle protection for Comp. At the end of 5 minutes, F/S
assumes control. As ice builds on the evaporator, the water level in the tank lowers. The
freeze cycle continues until F/S opens and terminates the cycle. There is a 15 second
delay before CB acknowledges an open F/S.
d) Pump-Out Cycle
LEDs 1, 3, and ꢀ are on. LED 4 is on when S4 dip switch 3 & 4 are set to 3 off and 4 on.
CAUTION! Do not adjust S4 dip switch 3 & 4 to 3 off and 4 on. Adjustment to this
position on this model prevents the unit from operating correctly and may cause
damage. For details, see "II.C.3.c) Pump-Out Timer (S4 dip switch 3 & 4)." Comp and
FMR remain energized, HGV energizes, WV energizes if S4 dip switch 3 off and 4 on.
LLV and FM de-energize. PM stops for ꢀ seconds then reverses, taking water from the
bottom of the tank and forcing pressure against the check valve seat allowing water to
go through the check valve and down the drain. At the same time, water flows through
the small tube to power flush F/S. When the pump-out timer expires, the pump-out is
complete.
The first pump-out occurs after the 11th freeze cycle, then every 10th cycle thereafter.
The pump-out frequency control is factory set, and generally no adjustment is required.
However, where water quality is bad and the icemaker needs a pump-out more often, the
pump-out frequency can be adjusted. The pump-out frequency control (S4 dip switch 5 &
6) can be set to have a pump-out occur every cycle, or every ꢀ, 5, or 10 cycles. Timing of
the first pump-out is dependent on S4 dip switch 5 & 6 settings. See the table below. For
details, see "II.C.3.d) Pump-Out Frequency Control (S4 dip switch 5 & 6)."
S4 Dip Switch Setting
Pump-Out
Frequency
1st Pump-Out
No. 5
OFF
ON
No. 6
OFF
OFF
ON
Every cycle
Every ꢀ cycles
Every 5 cycles
Every 10 cycles
After ꢀnd freeze cycle
After 3rd freeze cycle
After 6th freeze cycle
After 11th freeze cycle
OFF
ON
ON
e) Harvest Cycle
Same as the initial harvest cycle. See "II.B.1.b) Initial Harvest Cycle."
Note: Unit continues to cycle until BC is satisfied or power is turned off. The unit always
restarts at the 1-minute fill cycle.
f) Shutdown
When ice contacts the thermostatic bulb (BC switch open), BC shuts down the unit within
10 seconds. The bin control is factory set, and generally no adjustment is required.
However, adjustment may be needed in some conditions, particularly at higher altitude
locations.
Legend: BC–bin control; CB–control board; Comp–compressor; FMR–fan motor-remote;
FM–fan motor; F/S–float switch; HGV–hot gas valve; LLV–liquid line valve;
PM–pump motor; WV–inlet water valve
19
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C. Control Board
• A Hoshizaki exclusive solid-state control board is employed in KM-1301SAH/3,
KM-1301SWH/3, and KM-1301SRH/3, Stackable Crescent Cubers.
• All models are pretested and factory set.
CAUTION
1. The control board is fragile; handle very carefully.
ꢀ. The control board contains integrated circuits, which are susceptible to
failure due to static discharge. It is especially important to touch the metal
part of the unit before handling or replacing the control board.
3. Do not touch the electronic devices on the control board or the back of the
control board.
4. Do not change wiring and connections. Do not misconnect K3, K4, and K5,
because the same connector is used for the thermistor, K4 jumper, and float
switch. The control board RED K4 connector must have the K4 jumper in
place for proper operation.
5. Always replace the whole control board assembly if it goes bad.
6. Do not short out power supply to test for voltage.
ꢀ1
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1. Control Board Layout
"G" Control Board
Bin Control Switch
Closed LED (green)
(on continuously
S4 Dip
Switch
"OUTPUT TEST" Button
(used to test relays on control board)
"ALARM RESET" Button
in thermostatic bin
control application)
WHITE K3 Connector
Harvest Control
(thermistor)
Bin Control Switch
Open LED (yellow)
(mechanical bin control
application only)
RED K4 Connector
K4 Jumper (4A4883G01
thermostatic bin control
application) or Mechanical
Bin Control
Part Number
Alarm Buzzer
S5 Dip Switch
Power LED (red)
(lights when
power is supplied to
the control board)
BLACK K5 Connector
Float Switch
Label
(control board revision
level indicated on label
on side of relay)
Relay LEDs (4)
(indicate which
relays are energized
as listed below)
K1 Ten-Pin Connector
Pins #1 through #10
#1, 9 Magnetic Contactor
#ꢀ Hot Gas Valve (HGV)
#3 Liquid Line Valve (LLV),
Fan Motor (FM)
LED ꢀ (Xꢀ Relay)
Hot Gas Valve (HGV)
Fan Motor (FM)
(FM off when LED on)
#4 Pump Motor (icemaking)
#5 Pump Motor (pump-out,
harvest (if applicable))
#6 Inlet Water Valve (WV)
#7, 10 Component Power
Supply
LED 3 (X3 Relay)
Pump Motor (PM)
(on at pump-out,
harvest (if applicable))
LED 4 (X4 Relay)
Inlet Water Valve (WV)
#8 Open
Switch for "C" control board
and "ALPINE" control board
(service control board only)
LED 1 (X1 Relay)
Compressor (Comp),
Fan Motor-Remote
(FMR)
Kꢀ Connector
Transformer
Control Board
Part Number ꢀA379ꢀ-01
ꢀꢀ
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2. Features
a) Maximum Water Supply Period - 6 minutes
The inlet water valve will be open during harvest for 6 minutes or the length of harvest
minus 0 or 50 seconds (harvest pump timer (S4 dip switch 7)), whichever is shorter. For
details, see "II.C.3.e) Harvest Pump Timer (S4 dip switch 7)."
b) Harvest Backup Timer and Freeze Timer
The harvest backup timer shuts down the icemaker if, for two cycles in a row, the harvest
cycle takes more than ꢀ0 minutes to complete. The control board will signal this problem
using ꢀ beeps every 3 seconds.
The freeze timer shuts down the icemaker if, for two cycles in a row, the freeze cycle
takes longer than the time specified to complete. The control board will signal this
problem using 3 beeps every 3 seconds. The freeze timer is factory set using S4 dip
switch 9 & 10. For details, see "II.C.3.g) Freeze Timer (S4 dip switch 9 & 10).
The "ALARM RESET" button on the control board must be pressed with power on to
reset either of these safeties.
c) High Temperature Safety
The temperature of the suction line in the refrigeration circuit is limited by the high
temperature safety. This protects the unit from excessively high temperatures. If the
evaporator temperature reaches 1ꢀ7°F±7°F (53°C±4°C), the control board reads a .8 kΩ
signal from the thermistor and shuts down the icemaker.
The control board will signal this problem using 1 beep every 3 seconds. The "ALARM
RESET" button on the control board must be pressed with power on to reset the safety.
d) Low Water Safety
The control board checks the position of the float switch at the end of the initial 1-minute
fill cycle and at the end of each harvest cycle. If the float switch is in the up position
(electrical circuit closed), the control board changes to the next cycle. If the float switch
is in the down position (electrical circuit open), the control board changes to additional
1-minute fill cycles until water enters the tank and closes the float switch. When the float
switch closes, the control board changes to the next cycle. The unit will not start without
adequate water in the tank. This serves as a low water safety to protect the water pump.
For water-cooled model, if the condenser water supply is shut off, the unit is protected by
the high-pressure switch.
e) High Voltage and Low Voltage Cut-outs
The maximum and minimum allowable supply voltages of this icemaker are limited by
the high voltage and low voltage cut-outs. If miswiring (especially on single phase 3 wire
models) causes excessive voltage (147Vac±5% or more), the high voltage cut-out shuts
down the circuit in 3 seconds and the icemaker automatically stops. The control board
will signal this problem using 7 beeps every 3 seconds.
The icemaker also automatically stops in cases of insufficient voltage (9ꢀVac±5% or
less). The control board will signal this problem using 6 beeps every 3 seconds.
When the proper supply voltage is resumed, the icemaker automatically starts running
again.
ꢀ3
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f) LED Lights and Audible Alarm Safeties
At startup, a 5-second delay occurs while the control board conducts an internal timer
check. A beep occurs when the control switch is moved to the "ICE" position.
The red LED indicates proper control voltage and will remain on unless a control voltage
problem occurs. The green LEDs 1 through 4 energize and sequence from initial startup
as listed in the table below. Note that the order of the LEDs from the outer edge of the
control board is 1, 4, 3, ꢀ. For details, see "II.B. Sequence of Operation."
Time LEDs are On
Max.
Energized
Components
Sequence Step
LED
Min.
Avg.
1-Minute Fill Cycle
Harvest Cycle
4
WV
1 minute
ꢀ0 minutes 3 to 5 minutes
1, 4, ꢀ
Comp, FMR, WV,
HGV
Comp, FMR, PM,
HGV
Comp, FM/FMR,
PM, LLV
ꢀ minutes
0 seconds
5 minutes
Harvest Pump Timer 1, 3, ꢀ
50 seconds harvest pump timer
setting
freeze timer 30 to 35 minutes
setting
Freeze Cycle
1
Pump-Out Cycle
1, 4*, 3, ꢀ Comp, FMR, WV*, 10 seconds ꢀ0 seconds *pump-out timer
PM, HGV setting
The built-in safeties shut down the unit and have alarms as listed below.
No. of Beeps
(every 3 sec.)
Type of Alarm
Notes
1
High Evaporator Temp.
(temperature > 1ꢀ7°F)
(53°C)
Check for harvest problem (stuck HGV or relay), hot
water entering unit, stuck HM, or shorted thermistor.
ꢀ
3
Harvest Backup Timer
(harvest > ꢀ0 min. for two cycles LLV leaking by, low charge, or inefficient Comp.
in a row)
Check for open thermistor, HGV not opening, TXV or
Freeze Timer
(freeze > specified setting for
two cycles in a row)
Check for F/S stuck closed (up), WV leaking by, HGV
leaking by, PM not pumping, TXV not feeding properly,
LLV not opening, low charge, HM not bypassing, or
Timer is factory set using S4 dip inefficient Comp.
switch 9 & 10
To reset the above safeties, press the "ALARM RESET" button with the power supply on.
6
Low Voltage
(9ꢀVac±5% or less)
Red LED will turn off if voltage protection operates.
The control voltage safeties automatically reset when
voltage is corrected.
7
High Voltage
(147Vac±5% or more)
Legend: Comp–compressor; FM–fan motor; FMR–fan motor-remote; F/S–float switch;
HGV–hot gas valve; HM–headmaster (C.P.R.); LLV–liquid line valve; PM–pump
motor; TXV–thermostatic expansion valve; WV–inlet water valve
ꢀ4
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3. Controls and Adjustments
CAUTION
Dip switches are factory set. Failure to maintain factory settings may adversely
affect performance and warranty coverage. For more information, contact
Hoshizaki Technical Support at 1-800-ꢀ33-1940.
a) Default Dip Switch Settings
The dip switches are factory set to the following positions:
S4 Dip Switch
S4 Dip Switch No.
KM-1301SAH/3
KM-1301SWH/3
KM-1301SRH/3
1
2
3
4
5
6
7
8
9
10
OFF OFF ON ON ON ON ON OFF OFF OFF
OFF OFF ON ON ON ON ON OFF OFF OFF
OFF OFF ON ON ON ON ON OFF ON OFF
S5 Dip Switch (Do Not Adjust)
1
2
3
4
5
S5 Dip Switch No.
KM-1301SAH/3
OFF OFF OFF OFF OFF
KM-1301SWH/3 OFF OFF OFF OFF OFF
KM-1301SRH/3 OFF OFF OFF OFF OFF
Freeze Timer (9 & 10)
Factory Use (8)
Harvest Pump Timer (7)
(Do not adjust)
Pump-Out Frequency Control (5 & 6)
Pump-Out Timer (3 & 4)
(Do not adjust to 3 off and 4 on)
Harvest Timer (1 & ꢀ)
b) Harvest Timer (S4 dip switch 1 & 2)
The harvest timer starts when the thermistor reads 48°F (9°C) at the evaporator outlet
and the control board reads the thermistor's 3.9 KΩ signal. The harvest timer is factory
set, and generally no adjustment is required. However, a setting longer than the factory
setting may be advised in cases where the flush provided at harvest needs to be
prolonged for extra cleaning. Before changing this setting, contact Hoshizaki Technical
Support at 1-800-ꢀ33-1940 for recommendations. Keep in mind that setting the harvest
timer to a longer setting decreases ꢀ4-hour production.
S4 Dip Switch Setting
Time
(seconds)
No. 1
OFF
ON
No. 2
OFF
OFF
ON
60
90
OFF
ON
1ꢀ0
180
ON
ꢀ5
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c) Pump-Out Timer (S4 dip switch 3 & 4)
CAUTION
Do not adjust S4 dip switch 3 off and S4 dip switch 4 on for this model.
Otherwise, pump motor does not rotate in the pump-out direction.
When a pump-out is called for, the pump motor stops after the preceding freeze cycle.
The pump motor restarts ꢀ seconds later in the reverse direction, taking water from the
bottom of the tank and forcing pressure against the check valve seat allowing water to
go through the check valve and down the drain. At the same time, water flows through
the small tube to power flush the float switch. The pump motor drains the water tank
for the time determined by the pump-out timer. The pump-out timer also acts in place
of the harvest timer during cycles with a pump-out. The pump-out timer is factory set,
and generally no adjustment is required. However, where water quality is bad and the
icemaker needs a longer pump-out time, the pump-out timer can be adjusted. The
pump-out timer control can be set to pump-out for 10 or ꢀ0 seconds.
Inlet
Water
S4 Dip Switch Setting Time (seconds)
T1
10
10
10
ꢀ0
Valve
closed
closed
open
No. 3
OFF
ON
No. 4
OFF
OFF
ON
T2
150
180
1ꢀ0
180
OFF
ON
ON
closed
T1: Time to drain the water tank
Tꢀ: Harvest timer at pump-out
d) Pump-Out Frequency Control (S4 dip switch 5 & 6)
The pump-out frequency control is factory set to drain the water tank every 10 cycles,
and generally no adjustment is required. However, where water quality is bad and the
icemaker needs a pump-out more often, the pump-out frequency can be adjusted. The
pump-out frequency control can be set to have a pump-out occur every cycle, or every
ꢀ, 5, or 10 cycles.
Timing of the first pump-out is dependent on S4 dip switch 5 & 6 settings. The first
pump-out is factory set to occur after the 11th freeze cycle. See the table below.
S4 Dip Switch Setting
Pump-Out
Frequency
1st Pump-Out
No. 5
OFF
ON
No. 6
OFF
OFF
ON
Every cycle
Every ꢀ cycles
Every 5 cycles
Every 10 cycles
After ꢀnd freeze cycle
After 3rd freeze cycle
After 6th freeze cycle
After 11th freeze cycle
OFF
ON
ON
ꢀ6
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e) Harvest Pump Timer (S4 dip switch 7)
CAUTION
Factory set for proper operation. Do not adjust. Adjustment outside of the
factory default setting may result in damage to the icemaker.
Depending on the harvest pump timer setting, the pump motor energizes and runs
the last 0 or 50 seconds of harvest. When the pump is on, water circulates over the
evaporator. The water valve is open during harvest for a maximum of 6 minutes or the
length of harvest minus 0 or 50 seconds (determined by the harvest pump timer setting),
whichever is shorter.
When S4 dip switch 7 is on, the pump motor is energized through the #5 pin (DBu wire)
on the control board K1 ten-pin connector and the X1 relay (auxiliary code T-0, U-0), X10
relay (auxiliary code U-1 and later). The #5 pin (DBu wire) is used in most applications
to reverse the pump motor or energize the drain valve in pump-out cycles. In this
application, it is used for the pump-out cycle (reverse rotation) as well as the harvest
pump timer (freeze rotation). Therefore, the harvest pump timer relays are needed to
control the pump motor direction during the pump-out and harvest cycles. See "III.B.
Wiring Diagrams."
S4 Dip Switch Setting
Pump Motor
Time (seconds)
No. 7
ON
50
0
OFF
f) Factory Use (S4 dip switch 8)
Factory set for proper operation. Do not adjust. This must be left in the factory default
position.
g) Freeze Timer (S4 dip switch 9 & 10)
CAUTION
Adjust to proper specification, or the unit may not operate correctly.
The freeze timer setting determines the maximum allowed freeze time to prevent
possible freeze-up issues. Upon termination of the freeze timer, the control board
initiates the harvest cycle. After ꢀ consecutive freeze timer terminations, the control
board shuts down the icemaker. In this case, see "IV.F.3. Low Ice Production" for
possible solutions. The freeze timer is factory set, and generally no adjustment
is required. Before changing this setting, contact Hoshizaki Technical Support at
1-800-ꢀ33-1940 for recommendations.
Time
S4 Dip Switch Setting
(minutes)
No. 9
OFF
OFF
ON
No. 10
OFF
ON
60
50
70
60
OFF
ON
ON
ꢀ7
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h) Float Switch Control (S5 dip switch 1)
CAUTION
Do not adjust. This must be left in the factory default position or the unit will not
operate correctly.
Factory set. S5 dip switch 1 allows for single or double float switch applications. The
KM-1301SAH/3, KM1301SWH/3, and KM-1301SRH/3 use a single float switch.
i) Refill Counter (S5 dip switch 2 through 5)
CAUTION
Do not adjust. These must be left in the factory default position or the unit will
not operate correctly.
Factory set. S5 dip switch ꢀ through 5 allows for refills during the freeze cycle.
The KM-1301SAH/3, KM1301SWH/3, and KM-1301SRH/3 do not refill.
ꢀ8
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D. Bin Control
CAUTION
When the ambient temperature is below 45°F (7°C), the thermostatic bin
control switch opens and shuts down the icemaker even if the ice storage bin
is empty. When the thermostat is set in the prohibited range, the icemaker
operates continuously even if the ice storage bin is filled with ice. Setting in the
prohibited range may result in severe damage to the icemaker.
The thermostatic bin control switch is a temperature controlled switch used to control
the level of ice in the bin. It is in line with the power supply to the control switch.
The thermostatic bin control switch shuts down the unit within 10 seconds when ice
contacts the thermostatic bulb, regardless of the cycle at activation. The bin control
is factory set, and generally no adjustment is required. However, adjustment may be
needed in some conditions, particularly at higher altitude locations. For further details,
see "IV.C. Bin Control Check."
E. Float Switch
The float switch is used to determine that there is sufficient water in the tank after the
1-minute fill cycle and after each harvest cycle. The float switch is also used to determine
that the appropriate volume of water has been converted into ice before switching out of
the freeze cycle. No adjustment is required.
F. Thermistor
The thermistor is used as a harvest control sensor. The thermistor's resistance varies
depending on the suction line temperature. The control board monitors the resistance to
start the harvest timer. No adjustment is required.
G. Control Switch
The control switch has three positions: "OFF" for power off, "ICE" for icemaking, and
"WASH" to activate the water pump when cleaning and sanitizing.
ꢀ9
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C. Performance Data
1. KM-1301SAH (air-cooled)
APPROXIMATE ICE
PRODUCTION PER 24 HR.
WATER TEMP. (ºF/ºC)
70/21
AMBIENT TEMP.
(ºF/ºC)
70/21
80/27
90/32
100/38
70/21
80/27
90/32
50/10
90/32
1329
1292
1281
1253
603
586
581
568
1281
1217
1164
1140
581
552
528
517
1188
1109
1060
965
539
503
481
438
lbs./day kg./day
APPROXIMATE ELECTRIC
CONSUMPTION
2160
2164
2166
2193
2166
2174
2180
2197
2222
2257
2253
2320
watts
100/38
70/21
80/27
90/32
100/38
70/21
80/27
90/32
100/38
70/21
APPROXIMATE WATER
CONSUMPTION PER 24 HR.
605
510
481
345
2.29
1.93
1.82
1.30
481
318
183
179
1.82
1.21
0.69
0.68
429
331
167
152
1.62
1.25
0.63
0.58
gal./day m3/day
FREEZING CYCLE TIME
31
32
32
33
4.7
32
34
35
36
3.9
35
37
38
41
3.7
min.
HARVEST CYCLE TIME
80/27
90/32
100/38
4.1
3.9
3.1
2.9
2.1
2.1
3.1
2.1
2.1
min.
HEAD PRESSURE
70/21
80/27
90/32
255
269
273
17.9
18.9
19.2
273
297
317
19.2
20.9
22.3
298
321
342
20.9
22.6
24.0
PSIG kg/cm2G
100/38
278
19.5
323
22.7
365
25.7
SUCTION PRESSURE
70/21
80/27
90/32
50
50
50
3.5
3.5
3.5
50
50
50
3.5
3.5
3.5
53
55
55
3.8
3.9
3.8
PSIG kg/cm2G
100/38
52
3.6
51
3.6
59
4.1
TOTAL HEAT OF REJECTION FROM CONDENSER
20,300 BTU/h [AT 90ºF (32ºC) / WT 70ºF (21ºC)]
Note:
1. Pressure data is recorded at 5 minutes into freezing cycle. The data not in bold
should be used for reference only.
ꢀ. We reserve the right to make changes in specifications and design without prior
notice.
43
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2. KM-1301SAH3 (air-cooled)
APPROXIMATE ICE
PRODUCTION PER 24 HR.
WATER TEMP. (ºF/ºC)
70/21
AMBIENT TEMP.
(ºF/ºC)
70/21
80/27
50/10
90/32
1298
589
575
1257
1204
570
546
1162
1086
527
493
1267
90/32
100/38
70/21
80/27
90/32
1257
1225
570
556
1159
526
514
1049
947
476
430
lbs./day kg./day
1133
APPROXIMATE ELECTRIC
CONSUMPTION
2090
2119
2128
2123
2128
2178
2220
2224
2152
2187
2236
2250
watts
100/38
70/21
80/27
90/32
APPROXIMATE WATER
CONSUMPTION PER 24 HR.
511
438
415
305
1.94
1.66
1.57
1.15
415
287
181
176
1.57
1.09
0.68
0.67
367
286
159
139
1.39
1.08
0.60
0.53
gal./day m3/day
100/38
70/21
80/27
90/32
100/38
70/21
FREEZING CYCLE TIME
32
33
33
34
4.2
33
35
36
37
3.6
36
39
40
43
3.4
min.
HARVEST CYCLE TIME
80/27
90/32
100/38
3.8
3.6
2.9
2.8
2.1
2.1
2.9
2.1
2.1
min.
HEAD PRESSURE
70/21
80/27
90/32
254
268
272
17.9
18.8
19.1
272
295
315
19.1
20.8
22.1
296
319
339
20.8
22.4
23.8
PSIG kg/cm2G
100/38
276
19.4
321
22.5
361
25.4
SUCTION PRESSURE
70/21
80/27
90/32
48
49
49
3.4
3.4
3.4
49
50
51
3.4
3.5
3.6
52
54
55
3.6
3.8
3.8
PSIG kg/cm2G
100/38
50
3.5
52
3.6
58
4.1
TOTAL HEAT OF REJECTION FROM CONDENSER
20,200 BTU/h [AT 90ºF (32ºC) / WT 70ºF (21ºC)]
Note:
1. Pressure data is recorded at 5 minutes into freezing cycle. The data not in bold
should be used for reference only.
ꢀ. We reserve the right to make changes in specifications and design without prior
notice.
44
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3. KM-1301SWH (water-cooled)
APPROXIMATE ICE
PRODUCTION PER 24 HR.
WATER TEMP. (ºF/ºC)
70/21
AMBIENT TEMP.
(ºF/ºC)
50/10
90/32
70/21
80/27
1318
1319
598
598
1319
1321
599
599
1249
1211
567
549
90/32
100/38
1319
1281
599
581
1323
1301
600
590
1228
1141
557
518
lbs./day kg./day
APPROXIMATE ELECTRIC
CONSUMPTION
70/21
80/27
90/32
1740
1744
1746
1746
1754
1760
1767
1782
1786
watts
100/38
70/21
1755
1766
1810
APPROXIMATE WATER
CONSUMPTION PER 24 HR.
1407
1499
1527
1861
5.33
5.67
5.78
7.04
1527
1686
1818
1969
5.78
6.38
6.88
7.46
2049
2406
2465
3060
7.76
9.11
80/27
90/32
9.33
gal./day m3/day
100/38
11.58
FREEZING CYCLE TIME
70/21
80/27
31
31
32
33
34
31
90/32
100/38
70/21
31
32
4.5
32
33
3.9
34
36
3.5
min.
HARVEST CYCLE TIME
80/27
90/32
4.0
3.9
3.1
2.4
3.0
2.2
min.
100/38
3.2
2.4
2.1
HEAD PRESSURE
70/21
80/27
90/32
235
236
236
16.5
16.6
16.6
236
237
238
16.6
16.7
16.7
246
253
252
17.3
17.8
17.7
PSIG kg/cm2G
100/38
241
16.9
241
17.0
264
18.6
SUCTION PRESSURE
70/21
80/27
90/32
50
50
50
3.5
3.5
3.5
50
49
49
3.5
3.5
3.4
52
52
52
3.6
3.7
3.6
PSIG kg/cm2G
100/38
51
3.6
50
3.5
54
3.8
TOTAL HEAT OF REJECTION FROM CONDENSER
17,600 BTU/h [AT 90ºF (32ºC) / WT 70ºF (21ºC)]
TOTAL HEAT OF REJECTION FROM COMPRESSOR
WATER FLOW FOR CONDENSER
2,300 BTU/h [AT 90ºF (32ºC) / WT 70ºF (21ºC)]
120 gal./h [AT 100ºF (38ºC) / WT 90ºF (32ºC)]
PRESSURE DROP OF COOLING WATER LINE
less than 10 PSIG
Note:
1. Pressure data is recorded at 5 minutes into freezing cycle. The data not in bold
should be used for reference only.
ꢀ. We reserve the right to make changes in specifications and design without prior
notice.
45
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4. KM-1301SWH3 (water-cooled)
APPROXIMATE ICE
PRODUCTION PER 24 HR.
WATER TEMP. (ºF/ºC)
70/21
AMBIENT TEMP.
(ºF/ºC)
50/10
90/32
70/21
80/27
1333
1326
605
601
1323
1311
600
594
1246
1198
565
544
90/32
100/38
1323
1286
600
584
1300
1277
590
579
1201
1110
545
503
lbs./day kg./day
APPROXIMATE ELECTRIC
CONSUMPTION
70/21
80/27
90/32
1770
1786
1791
1791
1818
1840
1805
1824
1850
watts
100/38
70/21
1789
1842
1860
APPROXIMATE WATER
CONSUMPTION PER 24 HR.
1414
1499
1526
1846
5.35
5.68
5.78
6.99
1526
1673
1795
1944
5.78
6.33
6.80
7.36
2036
2382
2431
3015
7.71
9.02
80/27
90/32
9.20
gal./day m3/day
100/38
11.41
FREEZING CYCLE TIME
70/21
80/27
30
31
32
32
33
31
90/32
100/38
70/21
31
31
4.5
32
33
3.8
34
35
3.5
min.
HARVEST CYCLE TIME
80/27
90/32
4.0
3.8
3.0
2.4
3.0
2.2
min.
100/38
3.1
2.3
2.1
HEAD PRESSURE
70/21
80/27
90/32
237
238
238
16.7
16.7
16.7
238
239
240
16.7
16.8
16.9
249
256
255
17.5
18.0
17.9
PSIG kg/cm2G
100/38
244
17.1
244
17.1
269
18.9
SUCTION PRESSURE
70/21
80/27
90/32
50
50
50
3.5
3.5
3.5
50
49
49
3.5
3.5
3.4
52
53
52
3.7
3.7
3.7
PSIG kg/cm2G
100/38
51
3.6
50
3.5
55
3.9
TOTAL HEAT OF REJECTION FROM CONDENSER
17,400 BTU/h [AT 90ºF (32ºC) / WT 70ºF (21ºC)]
TOTAL HEAT OF REJECTION FROM COMPRESSOR
WATER FLOW FOR CONDENSER
2,300 BTU/h [AT 90ºF (32ºC) / WT 70ºF (21ºC)]
119 gal./h [AT 100ºF (38ºC) / WT 90ºF (32ºC)]
PRESSURE DROP OF COOLING WATER LINE
less than 10 PSIG
Note:
1. Pressure data is recorded at 5 minutes into freezing cycle. The data not in bold
should be used for reference only.
ꢀ. We reserve the right to make changes in specifications and design without prior
notice.
46
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5. KM-1301SRH (remote air-cooled)
APPROXIMATE ICE
PRODUCTION PER 24 HR.
WATER TEMP. (ºF/ºC)
70/21
AMBIENT TEMP.
(ºF/ºC)
50/10
90/32
70/21
80/27
1353
1324
614
600
1315
1264
596
573
1219
1144
553
519
90/32
100/38
1315
1281
596
581
1222
1196
554
542
1110
1008
504
457
lbs./day kg./day
APPROXIMATE ELECTRIC
CONSUMPTION
70/21
80/27
90/32
2010
2028
2033
2052
2033
2064
2090
2105
2088
2131
2153
2210
watts
100/38
70/21
APPROXIMATE WATER
CONSUMPTION PER 24 HR.
479
417
398
1.81
1.58
1.51
398
292
203
1.51
1.10
0.77
350
278
173
1.32
1.05
0.66
80/27
90/32
gal./day m3/day
100/38
70/21
80/27
303
1.15
196
0.74
146
0.55
FREEZING CYCLE TIME
31
32
33
34
36
32
90/32
100/38
70/21
32
33
4.1
35
35
3.6
37
40
3.3
min.
HARVEST CYCLE TIME
80/27
90/32
3.7
3.6
2.9
2.3
2.9
2.2
min.
100/38
3.0
2.3
2.1
HEAD PRESSURE
70/21
80/27
90/32
211
222
226
14.8
15.6
15.9
226
246
262
15.9
17.3
18.4
246
265
282
17.3
18.7
19.9
PSIG kg/cm2G
100/38
230
16.2
267
18.8
301
21.2
SUCTION PRESSURE
70/21
80/27
90/32
50
50
51
3.5
3.5
3.6
51
51
52
3.6
3.6
3.7
53
55
56
3.8
3.9
3.9
PSIG kg/cm2G
100/38
52
3.6
53
3.7
59
4.1
TOTAL HEAT OF REJECTION FROM CONDENSER
17,600 BTU/h [AT 90ºF (32ºC) / WT 70ºF (21ºC)]
TOTAL HEAT OF REJECTION FROM COMPRESSOR
CONDENSER VOLUME
2,500 BTU/h [AT 90ºF (32ºC) / WT 70ºF (21ºC)]
133 CU. IN (URC-14F)
Note:
1. Pressure data is recorded at 5 minutes into freezing cycle. The data not in bold
should be used for reference only.
ꢀ. We reserve the right to make changes in specifications and design without prior
notice.
47
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6. KM-1301SRH3 (remote air-cooled)
APPROXIMATE ICE
PRODUCTION PER 24 HR.
WATER TEMP. (ºF/ºC)
70/21
AMBIENT TEMP.
(ºF/ºC)
50/10
90/32
70/21
80/27
1339
1307
607
593
1297
1243
589
564
1203
1127
546
511
90/32
100/38
1297
1266
589
574
1197
1171
543
531
1088
988
494
448
lbs./day kg./day
APPROXIMATE ELECTRIC
CONSUMPTION
70/21
80/27
90/32
2090
2101
2105
2128
2105
2124
2140
2156
2160
2199
2208
2270
watts
100/38
70/21
APPROXIMATE WATER
CONSUMPTION PER 24 HR.
463
403
384
1.75
1.52
1.45
384
279
192
1.45
1.06
0.72
338
269
165
1.28
1.02
0.63
80/27
90/32
gal./day m3/day
100/38
70/21
80/27
291
1.10
185
0.70
141
0.53
FREEZING CYCLE TIME
31
32
34
35
37
32
90/32
100/38
70/21
32
33
3.9
35
36
3.4
39
42
3.2
min.
HARVEST CYCLE TIME
80/27
90/32
3.5
3.4
2.8
2.2
2.8
2.1
min.
100/38
2.9
2.2
2.1
HEAD PRESSURE
70/21
80/27
90/32
214
224
228
15.0
15.8
16.0
228
246
261
16.0
17.3
18.4
252
273
287
17.7
19.2
20.2
PSIG kg/cm2G
100/38
234
16.5
267
18.8
311
21.9
SUCTION PRESSURE
70/21
80/27
90/32
50
50
51
3.5
3.5
3.6
51
51
52
3.6
3.6
3.7
54
56
56
3.8
3.9
3.9
PSIG kg/cm2G
100/38
52
3.7
53
3.7
60
4.2
TOTAL HEAT OF REJECTION FROM CONDENSER
17,500 BTU/h [AT 90ºF (32ºC) / WT 70ºF (21ºC)]
TOTAL HEAT OF REJECTION FROM COMPRESSOR
CONDENSER VOLUME
2,400 BTU/h [AT 90ºF (32ºC) / WT 70ºF (21ºC)]
133 CU. IN (URC-14F)
Note:
1. Pressure data is recorded at 5 minutes into freezing cycle. The data not in bold
should be used for reference only.
ꢀ. We reserve the right to make changes in specifications and design without prior
notice.
48
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IV. Service Diagnosis
WARNING
1. This unit should be diagnosed and repaired only by qualified service
personnel to reduce the risk of death, electric shock, serious injury, or fire.
ꢀ. 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. Diagnostic Procedure
The diagnostic procedure is basically a sequence check which can be used at unit
startup or for system diagnosis. This procedure allows you to diagnose electrical system
and component failures in normal operating conditions of 70°F (ꢀ1°C) or warmer air and
50°F (10°C) or warmer water temperatures. Before conducting the diagnostic procedure,
check for correct installation, proper voltage per unit nameplate, and adequate water
supply. Check CB using the steps in "IV.B. Control Board Check." Check the dip switch
settings to assure that S4 dip switch 3, 4, 7, 8, 9, & 10 and S5 dip switch 1 through 5 are
in the factory default position. S4 dip switch 1, ꢀ, 5, & 6 are cleaning adjustments and
the settings are flexible. For factory default settings, see "II.C.3.a) Default Dip Switch
Settings." As you go through the procedure, check to assure the components energize
and de-energize correctly. If not, those components and controls are suspect.
1) Turn off the power supply, then access the control box. Clear any ice from BC.
ꢀ) Turn on the power supply, then move the control switch to the "ICE" position. A
5-second delay occurs. The red "POWER OK" LED and the green "BC CLOSED" LED
on the CB come on. If the yellow "BC OPEN" LED is on (indicating a full bin), confirm
that the CB K4 jumper is in place. If missing, the unit cannot operate.
WARNING
1. Risk of electric shock. Use extreme caution and exercise safe electrical
practices.
ꢀ. Moving parts (e.g., fan blade) can crush and cut. Keep hands clear.
49
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3) 1-Minute Fill Cycle – LED 4 is on. WV and Xꢀ relay (auxiliary code T-0, U-0),
X11 relay (auxiliary code U-1 and later) energize and the 1-minute fill cycle begins.
After 1 minute, CB checks for a closed F/S. If F/S is closed, the harvest cycle begins. If
closed, continue to step 4. If open, WV remains energized through additional 1-minute
fill cycles until water fills the tank and closes F/S (low water safety). Diagnosis: If WV
does not open, check the supply voltage at WV terminals, check continuity on the
coil, confirm the screen or external filter isn't plugged (no water flow). If unit fails to
start harvest, check for open F/S or bad 1-minute timer in CB. See "IV.D. Float Switch
Check and Cleaning" and "IV.B. Control Board Check."
4) Initial Harvest Cycle – LEDs 1, 4, and 2 are on. WV and Xꢀ relay (auxiliary code
T-0, U-0), X11 relay (auxiliary code U-1 and later) remain energized, HGV, X1 relay
(auxiliary code T-0, U-0), X10 relay (auxiliary code U-1 and later), Comp, and FMR
energize. CB monitors the warming of the evaporator via the thermistor located on the
suction line. When the thermistor reaches 48°F (9°C), CB reads a 3.9 kΩ signal from
the thermistor and turns harvest termination over to the harvest timer (S4 dip switch
1 & ꢀ). The harvest timer has settings of 60, 90, 1ꢀ0, and 180 seconds. For details,
see "II.C.3.b) Harvest Timer (S4 dip switch 1 & ꢀ)." When the harvest timer expires,
the harvest cycle is complete. CB checks the position of F/S and proceeds to the next
cycle if it is closed, or calls for a 1-minute fill cycle if it is open. The minimum total time
allowed by CB for a complete harvest cycle is ꢀ minutes.
WV is energized during harvest for a maximum of 6 minutes or the length of harvest
minus 0 or 50 seconds (harvest pump timer (S4 dip switch 7)), whichever is shorter.
LED 4 goes off when WV and Xꢀ relay (auxiliary code T-0, U-0), X11 relay (auxiliary
code U-1 and later) de-energize. LED 3 comes on and PM energizes and runs for the
last 0 or 50 seconds of harvest depending on S4 dip switch 7 setting. CAUTION! Do
not adjust S4 dip switch 7 out of the factory default position on this model.
Adjustment outside of the factory default position may result in damage to the
icemaker. For details, see "II.C.3.e) Harvest Pump Timer (S4 dip switch 7)."
PM is energized through the #5 pin (DBu wire) on the CB K1 ten-pin connector and
the X1 relay (auxiliary code T-0, U-0), X10 relay (auxiliary code U-1 and later). When
the harvest timer expires, the harvest cycle is complete. CB checks the position of
F/S and proceeds to the next cycle if it is closed or calls for a 1-minute fill cycle if it is
open. The minimum total time allowed by CB for a complete harvest cycle is ꢀ minutes.
Diagnosis: Check if Comp is running, HGV and WV still energized. Average harvest
cycle at factory setting is ꢀ to 3 minutes. How long does initial harvest last? 1.5 minutes
after initial harvest begins, touch Comp discharge line. Is it hot? If not, check refrigerant
pressures and Comp operation. If it is hot, touch the inlet line to the evaporator. Is it
hot? If it is hot and the freeze cycle is not starting, check the harvest timer adjustment
(S4 dip switch 1 & ꢀ), the thermistor for open circuit, the discharge line temperature,
Comp efficiency, and if HGV is fully open. For a thermistor check, see "IV.E. Thermistor
Check." Check that PM circulates water over evaporator for the last 50 seconds of
harvest. If not, check X1 relay (auxiliary code T-0, U-0), X10 relay (auxiliary code
U-1 and later) and S4 dip switch 3 & 4. If 1-minute fill cycle starts, see "IV.D. Float
Switch Check and Cleaning."
50
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5) Freeze Cycle – LED 1 is on. Comp and FMR remain energized, PM energizes
or remains energized depending on harvest pump timer (S4 dip switch 7) setting.
FM and LLV energize. HGV, and X1 relay (auxiliary code T-0, U-0), X10 relay
(auxiliary code U-1 and later) de-energize. The unit is held in freeze by a 5-minute
short cycle protection timer (CB will not accept a signal from F/S). After the 5-minute
short cycle protection timer expires, CB turns freeze termination over to F/S. During
the first 5 minutes of freeze, confirm that the evaporator temperature drops. After
5 minutes in freeze, disconnect black F/S connector from CB BLACK K5 connector.
After a 15 second delay, the unit should switch out of the freeze cycle. Diagnosis: If
the evaporator is not cold, check to see if HGV is still open or if TXV is not opening
properly, if WV is continuing to fill the reservoir, if there are improper unit pressures,
an inoperative Comp, or an inoperative HM. If the unit switches out of freeze with F/S
connector removed, but would previously not switch out of freeze with F/S connected
(long freeze - 3 beep alarm), F/S may be sticking. To check and clean F/S, see "IV.
D. Float Switch Check and Cleaning." If the unit remains in freeze longer than 15
seconds after disconnecting black F/S connector, replace CB. See "V.P. Removal and
Replacement of Control Board."
Note: Normal freeze cycle will last ꢀ0 to 40 minutes depending on model and
conditions. Cycle times and pressures should follow performance data provided
in this manual. See "III.C. Performance Data."
6) Pump-Out Cycle – (10/20 second pump-out) – LEDs 1, 3, and 2 are on. LED 4 is on
when S4 dip switch 3 & 4 are set to 3 off and 4 on. CAUTION! Do not adjust S4 dip
switch 3 & 4 to 3 off and 4 on. Adjustment to this position on this model prevents
the unit from operating correctly and may cause damage. For details, see "II.
C.3.c) Pump-Out Timer (S4 dip switch 3 & 4)." Comp and FMR remain energized, HGV
energizes. WV energizes if S4 dip switch 3 off and 4 on. LLV and FM de-energize.
PM stops for ꢀ seconds, then reverses for 10/ꢀ0 seconds depending on pump-out
timer S4 dip switch 3 & 4 setting. When the pump-out timer expires, the pump-out
is complete. The pump-out frequency control is factory set for every 10th cycle, and
generally no adjustment is required. However, where water quality is bad and the
icemaker needs a pump-out more often, the pump-out frequency can be adjusted.
The pump-out frequency control (S4 dip switch 5 & 6) can be set to have a pump-out
occur every cycle, or every ꢀ, 5, or 10 cycles. For details, see "II.C.3.d) Pump-Out
Frequency Control (S4 dip switch 5 & 6)."
Timing of the first pump-out is dependent on S4 dip switch 5 & 6 settings. See the table
below
S4 Dip Switch Setting
Pump-Out
Frequency
1st Pump-Out
No. 5
OFF
ON
No. 6
OFF
OFF
ON
Every cycle
Every ꢀ cycles
Every 5 cycles
Every 10 cycles
After ꢀnd freeze cycle
After 3rd freeze cycle
After 6th freeze cycle
After 11th freeze cycle
OFF
ON
ON
51
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Diagnosis: If PM does not reverse, check to see if CB S4 and S5 dip switch settings
are in the factory default position. If S4 dip switch 3 and 4 are adjusted to 3 off and
4 on, WV and harvest pump timer relays energize. Once these relays energize, the
pump motor rotates in the freeze cycle rotation. See "III.B. Wiring Diagrams." Check
PM circuit and capacitor, check #5 pin (DBu wire) on CB K1 ten-pin connector for
voltage, harvest pump timer X1 and Xꢀ relays (auxiliary code T-0 and U-0), X10 and
X11 relays (auxiliary code U-1 and later). If water does not pump out, check and clean
the check valve assembly and tubing.
7) Normal Harvest Cycle – same as the initial harvest cycle – Return to "IV.A.4) Initial
Harvest Cycle."
8) Shutdown
When the unit is running hold ice in contact with the thermostatic bulb, the thermostatic
BC switch opens within 10 seconds, shutting down the unit. The bin control is factory
set, and generally no adjustment is required. However, adjustment may be needed in
some conditions, particularly at higher altitude locations. Diagnosis: See "IV.C. Bin
Control Check."
Legend: BC–bin control; CB–control board; Comp–compressor; FM–fan motor;
FMR–fan motor-remote; F/S–float switch; HGV–hot gas valve; HM–headmaster
(C.P.R.); LLV–liquid line valve; PM–pump motor; TXV–thermostatic expansion
valve; WV–inlet water valve
5ꢀ
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B. Control Board Check
Before replacing a control board that does not show a visible defect and that you
suspect is bad, always conduct the following check procedure. This procedure will help
you verify your diagnosis.
Alarm Reset: If the control board is in alarm (beeping), press the "ALARM RESET"
button on the control board with power on. Once reset, the unit starts at
the 1-minute fill cycle. For audible alarm information, see "II.C.ꢀ.f) LED
Lights and Audible Alarm Safeties."
1) Check the dip switch settings to assure that S4 dip switch #3, 4, 7, 8, 9, & 10 and
S5 dip switch 1 through 5 are in the factory default position. S4 dip switch 1, ꢀ, 5, & 6
are cleaning adjustments and the settings are flexible. For factory default settings, see
"II.C.3.a) Default Dip Switch Settings."
ꢀ) Move the control switch to the "ICE" position. If the red "POWER OK" LED is on, the
control voltage is good. If the "POWER OK" LED is off, check the control transformer
secondary circuit. The control transformer secondary circuit includes the cleaning valve
interlock switch. Make sure the interlock switch is closed; otherwise, no control voltage
is supplied to the Kꢀ connector. Transformer output is 10.5V at 115V primary input. If
the secondary circuit has proper voltage and the red LED is off, the control board is
bad and should be replaced. See "V.P. Removal and Replacement of Control Board."
If the secondary circuit does not have proper voltage, check the control transformer
primary circuit. Check for 115V at the control board K1 ten-pin connector. Check the
#10 pin (BR wire) to a white neutral wire for 115V. (Always choose a white neutral wire
to establish a good neutral connection when checking voltages.) For additional checks,
see "IV.F.1.[1] The icemaker will not start."
3) The "OUTPUT TEST" button provides a relay sequence test. Make sure the control
switch is in the "ICE" position, then press the "OUTPUT TEST" button. The correct
lighting sequence is 1, 4, 3, ꢀ. Note that the order of the LEDs from the outer edge
of the control board is 1, 4, 3, ꢀ. Components (e.g., compressor) will cycle during the
test. Following the test, the icemaker resumes operation. If the LEDs do not light as
described above, the control board is bad and should be replaced. See "V.P. Removal
and Replacement of Control Board."
4) To verify voltage output from the control board to the components, slide the control
board K1 ten-pin connector out far enough to allow multimeter lead contact. With the
unit in the cycle to be tested, check output voltage from the corresponding pin on the
control board K1 ten-pin connector to ground. If output voltage is not found and the
appropriate LED is on, the control board is bad and should be replaced. See "V.P.
Removal and Replacement of Control Board."
53
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C. Bin Control Check
To check the thermostatic bin control, follow the steps below.
CAUTION
When the ambient temperature is below 45°F (7°C), the thermostatic bin
control switch opens and shuts down the icemaker even if the ice storage bin
is empty. When the thermostat is set in the prohibited range, the icemaker
operates continuously even if the ice storage bin is filled with ice. Setting in the
prohibited range may result in severe damage to the icemaker.
The bin control is factory set, and generally no adjustment is required. However,
adjustment may be needed in some conditions, particularly at higher altitude locations.
1) Turn off the power supply.
ꢀ) Remove the front panel, then remove the control box cover.
3) Disconnect the thermostatic bin control wires from the thermostatic bin control switch.
4) Clear any ice away from the thermostatic bulb, then hold your hand around the
thermostatic bulb to warm it up.
5) Check for continuity across the thermostatic bin control switch. If closed, continue to
step 6. If open, adjust or replace the thermostatic bin control.
6) With the multimeter test leads still in place, hold ice on the thermostatic bulb to lower
the temperature. Within 10 seconds, the thermostatic bin control switch should open
(no continuity). If it remains closed, adjust or replace the thermostatic bin control.
D. Float Switch Check and Cleaning
The float switch is used to determine that there is sufficient water in the tank after the
1-minute fill cycle and after each harvest cycle. The float switch is also used to determine
that the appropriate volume of water has been converted into ice before switching out of
the freeze cycle. No adjustment is required.
1. Float Switch Check
To check the float switch, follow the steps below.
1) Turn off the power supply.
ꢀ) Remove the front panel and move the control switch to the "OFF" position.
3) Remove the insulation panel, then remove the cap located on the front bottom part of
the ice dropping hole. Drain the water tank.
4) Replace the cap in its correct position. Be careful not to cross thread it.
5) Remove the control box cover.
6) Disconnect the black float switch connector from the control board BLACK
K5 connector.
7) Check for continuity across the float switch leads. With the water tank empty, the float
switch should be open. If open, continue to step 8. If closed, follow the steps in "IV.
D.ꢀ. Float Switch Cleaning." After cleaning the float switch, check it again. Replace if
necessary.
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8) Reconnect the black float switch connector to the control board BLACK K5 connector,
then replace the control box cover in its correct position.
9) Move the control switch to the "ICE" position. Replace the insulation panel and the
front panel in their correct positions, then turn on the power supply. After 1 minute, the
1-minute fill cycle should end and the initial harvest cycle should begin. If the initial
harvest cycle begins, the float switch is good and the check is complete. If the initial
harvest cycle does not begin, continue to step 10.
10) Turn off the power supply.
11) Remove the front panel.
1ꢀ) Move the control switch to the "OFF" position.
13) Remove the control box cover.
14) Disconnect the black float switch connector from the control board BLACK
K5 connector.
15) Check for continuity across the float switch leads. With the water tank full, the float
switch should be closed. If the float switch is closed and the icemaker will not switch
from the 1-minute fill cycle to the initial harvest cycle, replace the control board.
If open, confirm that the water tank is full. If the tank is not full, check the water supply,
water filters, and inlet water valve. If the tank is full, follow the steps in "IV.D.ꢀ. Float
Switch Cleaning." After cleaning the float switch, check it again. Replace if necessary.
2. Float Switch Cleaning
Depending on local water conditions, scale may build up on the float switch. Scale on the
switch can cause the float to stick. In this case, the float switch should be cleaned.
1) Turn off the power supply.
ꢀ) Remove the front panel and move the control switch to the "OFF" position.
3) Remove the insulation panel, then remove the cap located on the front bottom part of
the ice dropping hole. Drain the water tank.
Vent
4) Replace the cap in its correct position. Be
careful not to cross thread it.
Flush
5) Disconnect the vent tube and the flush
tube from the top of the float switch, then
remove the float switch assembly from the
mounting bracket and remove the rubber
boot from the bottom of the float switch
assembly. See Fig. 1.
Shaft
Float Switch
Housing
6) Remove the retainer rod from the bottom of
the float switch assembly, then remove the
float. Be careful not to bend the retainer
rod excessively when removing it.
Float
Retainer Rod
Rubber Boot
and Hose
Fig. 1
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7) Wipe down the float switch assembly's housing, shaft, float, and retainer rod with a
mixture of 1 part of recommended cleaner Hoshizaki "Scale Away" or "LIME-A-WAY"
(Economics Laboratory, Inc.) and ꢀ5 parts of warm water. Clean the inside of the
rubber boot and hose with the cleaning solution. Rinse the parts thoroughly with clean
water.
8) Reassemble the float switch assembly and replace it and the rubber boot in their
correct positions. Reconnect the vent tube and the flush tube.
9) Move the control switch to the "ICE" position.
10) Replace the insulation panel and front panel in their correct positions.
E. Thermistor Check
To check thermistor resistance, follow the steps below.
1) Turn off the power supply.
ꢀ) Remove the front panel, then move the control switch to the "OFF" position.
3) Remove the control box cover.
4) Remove the thermistor. See "V.L. Removal and Replacement of Thermistor."
5) Immerse the thermistor sensor portion in a glass containing ice and water for ꢀ or
3 minutes.
6) Remove the white thermistor connector from the control board WHITE K3 connector
and check the resistance between thermistor leads. Normal reading is within 4.7 to
6.ꢀ kΩ. If outside the normal reading, replace the thermistor. If inside the normal
reading, continue to the next step.
7) Replace the thermistor in its correct position. See "V.L. Removal Replacement of
Thermistor."
8) Reconnect the white thermistor connector to the control board WHITE K3 connector.
9) Replace the control box cover in its correct position, then turn on the power supply.
10) Move the control switch to the "ICE" position.
11) Once the harvest cycle starts, begin timing the harvest cycle.
1ꢀ) The harvest timer should expire and terminate the harvest cycle within ꢀ to 3 minutes.
If the harvest timer does not expire and terminate the harvest cycle, the harvest timer is
bad and the control board should be replaced. See "V.P. Removal and Replacement of
Control Board."
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F. Diagnostic Charts
1. No Ice Production
Problem
Possible Cause
Remedy
[1] The icemaker will not a) Power Supply
start.
1. Off, blown fuse, or
tripped breaker.
1. Turn on, replace, or reset.
ꢀ. Loose connection.
3. Bad contacts.
ꢀ. Tighten.
3. Check for continuity and
replace.
4. Not within
4. Refer to nameplate and
correct.
specifications.
b) Transformer (115V
primary) (3 phase only)
1. Voltage tap switch
does not match
1. Verify incoming voltage,
move switch to proper
setting.
incoming voltage.
ꢀ. Coil winding open or ꢀ. Replace.
shorted.
c) Water Supply
1. Water supply off or
pressure too low.
1. Check and get
recommended pressure.
d) Thermostatic Bin
Control
1. Tripped with bin filled 1. Remove ice.
with ice.
ꢀ. Ambient temperature ꢀ. Increase ambient
too cool.
temperature.
3. Set too warm.
3. See "IV.C. Bin Control
Check."
4. Bulb out of position.
5. Bad contacts.
4. Place in position.
5. Check for continuity and
replace.
e) Fuse (Control Box)
f) Control Switch
1. Blown.
1. Check for short circuit and
replace.
1. "OFF" or "WASH"
position.
1. Move to "ICE" position.
ꢀ. Bad contacts.
ꢀ. Check for continuity and
replace.
g) High Pressure Control 1. Bad contacts.
1. Check for continuity and
replace.
ꢀ. Dirty air filter or
condenser.
ꢀ. Clean.
3. Ambient or condenser 3. Reduce temperature.
water temperature too
warm.
4. Refrigerant
overcharged.
4. Recover, evacuate, and
recharge.
5. Fan not operating
(except water-cooled
model).
5. See chart 1.[7].
6. Refrigerant lines or
components plugged.
6. Clean and replace drier.
7. Condenser water
pressure too low or off
(water-cooled model).
7. Check and get
recommended pressure.
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Problem
Possible Cause
Remedy
[1] The icemaker will not h) Transformer
start. (continued)
1. Coil winding open or 1. Replace.
shorted.
i) Wiring to Control Board 1. Loose connections or 1. Check for continuity and
open.
replace.
j) Interlock Switch
(Cleaning Valve)
1. Open position.
ꢀ. Bad contacts.
1. Move to closed position.
ꢀ. Check for continuity and
replace.
k) Thermistor
1. Leads shorted or open 1. See "IV.E. Thermistor
and high temperature
or harvest backup
timer safety operates
(1 beep or ꢀ beep
alarm).
Check."
l) Hot Gas Valve
1. Continues to open
in freeze cycle and
freeze timer safety
operates (3 beep
alarm).
1. Check for hot gas valve
stuck open and replace.
m)Control board green
"BC CLOSED" LED
off and/or yellow "BC
OPEN" LED on
1. K4 jumper missing or 1. Confirm jumper is in place.
open.
Check for continuity.
n) Inlet Water Valve
1. Mesh filter or orifice
gets clogged and
water supply cycle
does not finish.
1. Clean.
ꢀ. Coil winding open.
ꢀ. Replace.
3. Wiring to inlet water
valve.
3. Check for loose connection
or open, and replace.
o) Float Switch
1. Bad contacts.
1. Check for continuity and
replace.
ꢀ. Float does not move ꢀ. Clean or replace. See "IV.
freely.
D. Float Switch Check and
Cleaning."
p) Control Board
a) Water Supply
b) Float Switch
1. Defective or in alarm. 1. See "IV.B. Control Board
Check."
[ꢀ] Fill cycle will not
terminate.
1. Water supply off or
pressure too low.
1. Check and get
recommended pressure.
1. Connector
disconnected.
1. Reconnect.
ꢀ. Defective switch.
ꢀ. Clean or replace. See "IV.
D. Float Switch Check and
Cleaning."
3. Float does not move ꢀ. Clean or replace. See "IV.
freely or switch
defective.
D. Float Switch Check and
Cleaning."
c) Control Board
1. Defective.
1. See "IV.B. Control Board
Check."
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Problem
Possible Cause
Remedy
[3] Compressor will
not start or stops
operating.
a) Magnetic Contactor
1. Bad contacts.
1. Check for continuity and
replace.
ꢀ. Coil winding open.
ꢀ. Replace.
1. Replace.
b) Start Capacitor or Run 1. Defective.
Capacitor
c) Internal Overload
Protector Open (check
1 through 3 to the right
and d through f below)
1. Loose terminal.
1. Tighten or replace.
ꢀ. Check and correct.
3. Clean.
ꢀ. Voltage.
3. Dirty condenser.
d) Starter
1. Bad contacts.
1. Check and replace.
ꢀ. Replace.
ꢀ. Coil winding open.
e) Compressor
1. Power supply not
within specifications.
1. Refer to nameplate and
correct.
ꢀ. Wiring to compressor. ꢀ. Check for loose connection
or open, and replace.
3. Defective.
3. Replace.
4. Protector tripped.
4. Reduce temperature.
f) Control Board
1. No power to contactor. 1. See "IV.B. Control Board
Check."
[4] Water continues to
be supplied in freeze
cycle.
a) Water Pressure
b) Inlet Water Valve
1. Too high.
1. Reduce.
1. Diaphragm does not 1. Check for water leaks with
close.
icemaker off.
c) Control Board
1. Defective.
1. See "IV.B. Control Board
Check."
[5] Water pump will not a) Pump Motor
start.
1. Motor winding open. 1. Replace.
ꢀ. Bearing worn out. ꢀ. Replace.
3. Wiring to pump motor. 3. Check for loose connection
or open, and replace.
4. Defective capacitor.
4. Replace.
5. Defective or bound
impeller.
5. Replace and clean.
6. Mechanical seal worn 6. Check and replace.
out.
b) Control Board
c) Control Switch
1. Defective.
1. See "IV.B. Control Board
Check."
1. Bad contacts.
1. Replace.
[6] Freeze cycle time is a) Pump-Out Check Valve 1. Leaking by.
too short.
1. Clean or replace.
b) Float Switch
1. Dirty or erratic
operation.
1. Clean or replace. See "IV.
D. Float Switch Check and
Cleaning."
c) Control Board
d) Water System
1. Defective.
1. See "IV.B. Control Board
Check."
1. Water leaks.
1. Check connections for
water leaks, and replace.
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Problem
Possible Cause
Remedy
[7] Fan motor will
not start, or is not
operating (except
water-cooled model).
a) Fan Motor
1. Motor winding open. 1. Replace.
ꢀ. Bearing worn out.
ꢀ. Replace.
3. Wiring to fan motor.
3. Check for loose connection
or open, and replace.
4. Defective capacitor.
5. Fan blade bound.
1. Defective.
4. Replace.
5. Check and replace.
b) Control Board
a) Refrigerant
1. See "IV.B. Control Board
Check."
[8] All components
run, but no ice is
produced.
1. Low charge.
1. Check for leaks. Recover,
repair, evacuate, and
recharge.
ꢀ. Air or moisture
trapped.
ꢀ. Replace drier, evacuate,
and recharge.
b) Compressor
1. Defective.
1. Replace.
c) Hot Gas Valve
1. Continues to open in 1. Check and replace.
freeze cycle.
d) Liquid Line Valve
(if applicable)
1. Continues to close in 1. Check and replace.
freeze cycle.
e) Inlet Water Valve
1. Inlet water valve is
wide open during
freeze.
1. Check for water leaks with
icemaker off.
f) Expansion Valve
1. Bulb loose.
1. Secure bulb.
ꢀ. Operating erratically. ꢀ. Check and replace.
g) Headmaster (C.P.R.)
(remote condenser
unit)
1. Not operating properly 1. Replace headmaster.
and liquid line
temperature too warm.
h) Water Supply Line
(water-cooled model)
1. Condenser water
pressure too low or
off and high pressure
control opens and
closes frequently.
1. Check and get
recommended pressure.
i) Water Regulating Valve 1. Set too high.
(water-cooled model)
1. Adjust or replace. See
"V.J. Adjustment of Water
Regulating Valve."
2. Evaporator is Frozen Up
Problem
Possible Cause
Remedy
[1]Freeze cycle time is a) Inlet Water Valve
too long.
1. Diaphragm does not 1. Check for water leaks with
close.
icemaker off.
b) Float Switch
1. Float does not move 1. Clean or replace. See "IV.
freely or defective
switch.
D. Float Switch Check and
Cleaning."
c) Evaporator
d) Spray Tubes
e) Water Pump
1. Scaled up.
ꢀ. Damaged.
1. Dirty.
1. Clean.
ꢀ. Replace.
1. Clean.
ꢀ. Out of position.
1. RPM too slow.
ꢀ. Place in position.
1. See chart 1.[5].
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Problem
Possible Cause
Remedy
[1]Freeze cycle time is f) Thermistor
too long. (continued)
1. Loose or
1. Reattach or connect. See
"IV.E. Thermistor Check."
disconnected.
g) Refrigerant Charge
1. Low charge.
1. Check for leaks. Recover,
repair, evacuate, and
recharge.
h) Expansion Valve
1. Bulb loose.
1. Secure bulb.
ꢀ. Operating erratically. ꢀ. Check and replace.
i) Control Board
a) Evaporator
1. Defective.
1. See "IV.B. Control Board
Check."
[ꢀ]All ice formed on
evaporator does not
fall into bin in harvest
cycle.
1. Scaled up.
ꢀ. Damaged.
1. Clean.
ꢀ. Replace.
b) Ambient and/or Water 1. Too cool.
Temperature
1. Increase temperature.
c) Water Supply Line
1. Water pressure too
1. Check and get
low.
recommended pressure.
d) Water System
1. Water supply line
too small; requires
1/ꢀ" OD line dedicated
per machine.
1. Increase water line size.
ꢀ. Water filter clogged or ꢀ. Replace filter or install a
flow rate too small.
higher flow rate filter.
e) Inlet Water Valve
f) Spray Tubes
1. Dirty mesh filter or
orifice.
1. Clean.
ꢀ. Diaphragm does not ꢀ. Check for water leaks with
close.
icemaker off.
1. Dirty.
1. Clean.
ꢀ. Out of position.
ꢀ. Place in position.
g) Thermistor
1. Loose or
1. Reattach or connect. See
"IV.E. Thermistor Check."
disconnected.
h) Hot Gas Valve
1. Coil winding open.
1. Replace.
ꢀ. Replace.
ꢀ. Plunger does not
move.
3. Wiring to hot gas
valve.
3. Check for loose
connection or open, and
replace.
i) Expansion Valve
1. Open.
1. Check and replace.
j) Liquid Line Valve
(if applicable)
1. Continues to open in 1. Check operation in harvest
harvest cycle.
cycle and replace.
k) Control Board
1. Harvest timer is set
too short.
1. Adjust longer, referring to
"II.C.3.b) Harvest Timer
(S4 dip switch 1 & ꢀ)."
ꢀ. Defective.
ꢀ. See "IV.B. Control Board
Check."
l) Refrigerant Charge
1. Low Charge
1. Check for leaks. Recover,
repair, evacuate, and
recharge.
m)Water Regulating Valve 1. Leaking by in harvest. 1. Check and replace.
(water-cooled model)
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Problem
Possible Cause
Remedy
[3]Other.
a) Ice Cube Guide
1. Out of position.
1. Bulb out of position.
ꢀ. Bad contacts.
1. Place in position.
1. Place in position.
b) Thermostatic Bin
Control
ꢀ. See "IV.C. Bin Control
Check."
3. Low Ice Production
Problem
Possible Cause
Remedy
[1] Freeze cycle time is a) Inlet Water Valve
long.
1. Diaphragm does not 1. Check for water leaks with
close.
icemaker off.
b) Float Switch
1. Float switch does
not move freely or
defective switch.
1. Clean or replace. See "IV.
D. Float Switch Check and
Cleaning."
c) Evaporator
d) Spray Tubes
e) Water Pump
1. Scaled up.
ꢀ. Damaged.
1. Dirty.
1. Clean.
ꢀ. Replace.
1. Clean.
ꢀ. Out of position.
1. RPM too slow.
ꢀ. Place in position.
1. See chart 1.[5].
f) Condenser (except
water-cooled model)
1. Air filter or condenser 1. Clean.
clogged.
g) Refrigerant Charge
1. Low charge.
1. Check for leaks. Recover,
repair, evacuate, and
recharge.
h) Hot Gas Valve
1. Open.
1. Check and replace.
1. Secure bulb.
i) Expansion Valve
1. Bulb loose.
ꢀ. Operating erratically. ꢀ. Check and replace.
1. Erratic or off. 1. See chart 1.[3].
1. Water regulating valve 1. Adjust or replace. See
j) Compressor
k) Condenser Water
(water-cooled model)
set too high.
"V.J. Adjustment of Water
Regulating Valve."
ꢀ. Condenser water
pressure too low.
ꢀ. Check and get
recommended pressure.
3. Water temperature out 3. Correct to specification.
of specification.
l) Liquid Line Valve
1. Erratic, sticking.
1. Bypassing.
1. Check and replace.
1. Replace.
m)Headmaster (C.P.R.)
(remote condenser
unit)
n) Control Board
1. Float switch
1. Check and reconnect.
connection loose (K5).
ꢀ. Defective.
ꢀ. See "IV.B. Control Board
Check."
6ꢀ
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Problem
Possible Cause
Remedy
[ꢀ] Harvest cycle time is a) Water Supply
long.
1. Water temperature too 1. Increase temperature.
cold.
b) Thermistor
1. Out of position or
defective.
1. Reattach and secure.
See "V.L. Removal
and Replacement of
Thermistor" and "IV.E.
Thermistor Check."
c) Control Board
1. Not reading
thermistor.
1. Check and replace. See
"IV.E. Thermistor Check."
ꢀ. Sending voltage to
liquid line valve (if
ꢀ. Check and replace. See
"IV.B. Control Board
Check."
applicable) in harvest.
d) Inlet Water Valve
e) Evaporator
1. Clogged.
1. Clean or replace.
1. Clean.
1. Scaled up.
f) Hot Gas Valve
1. Does not open, or
opens partially.
1. Check and replace.
g) Expansion Valve
1. Wide open in harvest. 1. Check and replace.
h) Water Regulating Valve 1. Open during harvest. 1. Adjust or replace. See
(water-cooled model)
"V.J. Adjustment of Water
Regulating Valve ."
i) Liquid Line Valve (if
applicable)
1. Open during harvest 1. Check and replace.
cycle.
4. Abnormal Ice
Problem
Possible Cause
Remedy
[1] Small cubes.
a)Pump-Out Check Valve 1. Dirty or worn and
leaking by.
1. Clean or replace.
b)Ice Cube Guide
1. Out of position.
Circulated water falls
into bin.
1. Place in position.
c) Water System
1. Water supply line
too small; requires
1/ꢀ" OD line dedicated
per machine.
1. Increase water line size.
ꢀ. Water filter clogged or ꢀ. Replace filter or install a
flow rate too small.
higher flow rate filter.
d)Inlet Water Valve
1. Dirty mesh filter or
orifice.
1. Clean.
e)Pump Motor
1. RPM too slow.
1. Defective.
1. See chart 1.[5].
f) Control Board
1. See "IV.B. Control Board
Check."
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Problem
Possible Cause
Remedy
[ꢀ] Cloudy or irregular
cubes.
a)Evaporator
1. Frozen up.
ꢀ. Scaled up.
3. Damaged.
1. See chart ꢀ.
ꢀ. Clean
3. Replace.
b)Water System
1. Water supply line
too small; requires
1/ꢀ" OD line dedicated
per machine.
1. Increase water line size.
ꢀ. Water filter clogged or ꢀ. Replace filter or install a
flow rate too small.
higher flow rate filter.
3. High hardness or
contains impurities.
3. Install a water softener or
filter.
c) Spray Guide
1. Dirty.
1. Clean.
5. Other
Problem
Possible Cause
Remedy
[1]Icemaker will not stop a)Thermostatic Bin
1. Set too cold.
ꢀ. Defective.
1. See "IV.C. Bin Control
Check."
when bin is filled with
ice.
Control
ꢀ. Replace.
[ꢀ] Abnormal noise.
a)Pump Motor
1. Bearings worn out.
1. Bearings worn out.
1. Replace.
1. Replace.
b)Fan Motor (except
water-cooled model)
ꢀ. Fan blade deformed. ꢀ. Replace.
3. Fan blade does not
move freely.
3. Replace.
c) Compressor
1. Bearings worn out or 1. Replace.
cylinder valve broken.
ꢀ. Mounting pad out of
position.
ꢀ. Reinstall.
d)Refrigerant Lines
1. Rub or touch other
lines or surfaces.
1. Reposition.
[3]Ice in storage bin
often melts.
a)Drain Line(s)
1. Plugged.
1. Clean.
b)Icemaker and Bin
1. Drains not run
separately.
1. Separate the drain lines.
c) Ice Cube Guide
1. Out of position.
Circulated water falls
into bin.
1. Place in position.
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V. Removal and Replacement of Components
WARNING
1. This unit should be diagnosed and repaired only by qualified service
personnel to reduce the risk of death, electric shock, serious injury, or fire.
ꢀ. Move the control switch to the "OFF" position and turn off the power supply
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-certified service personnel.
ꢀ. 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-404A
as a mixture with pressurized air for leak testing.
CAUTION
1. The Polyol Ester (POE) oils used in R-404A units can absorb moisture
quickly. Therefore it is important to prevent moisture from entering the
system when replacing or servicing parts.
ꢀ. Always install a new drier every time the sealed refrigeration system is
opened.
3. Do not replace the drier until after all other repair or replacement has been
made. Install the new drier with the arrow on the drier in the direction of the
refrigerant flow.
4. When brazing, protect the drier by using a wet cloth to prevent the drier from
overheating. Do not allow the drier to exceed ꢀ50°F (1ꢀ1°C).
5. Do not leave the system open for longer than 15 minutes when replacing or
servicing parts.
1. Refrigerant Recovery
The icemaker is provided with refrigerant service valves. Using proper refrigerant practices,
recover the refrigerant from the service valves and store it in an approved container. Do not
discharge the refrigerant into the atmosphere.
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2. Brazing
WARNING
1. R-404A itself is not flammable at atmospheric pressure and temperatures up
to 176°F (80°C).
ꢀ. R-404A itself is not explosive or poisonous. However, when exposed to
high temperatures (open flames), R-404A can be decomposed to form
hydrofluoric acid and carbonyl fluoride 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-404A
as a mixture with pressurized air for leak testing.
1) Braze all fittings while purging with nitrogen gas flowing at a pressure of 3 to 4 PSIG.
Note: Because the pipes in the evaporator case are specially coated to resist corrosion,
it is important to make connections outside the evaporator case when possible. If
it is necessary to braze inside the evaporator case, use sandpaper to remove the
coating from the brazing connections before unbrazing the components.
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. Install the new drier with the arrow on the drier in the direction of the
refrigerant flow.
3. When brazing, protect the drier by using a wet cloth to prevent the drier from
overheating. Do not allow the drier to exceed ꢀ50°F (1ꢀ1°C).
ꢀ) Use an electronic leak detector or soap bubbles to check for leaks. Add a trace of
refrigerant to the system (if using an electronic leak detector), and then raise the
pressure using nitrogen gas (140 PSIG). DO NOT use R-404A as a mixture with
pressurized air for leak testing.
3. Evacuation and Recharge (R-404A)
1) Attach a vacuum pump to the system. Be sure to connect the charging hoses to both
high and low-side service valves.
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.
ꢀ) Turn on the vacuum pump. Open the gauge manifold valves. Then, open the high and
low-side service valves. Never allow the oil in the vacuum pump to flow backwards.
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3) Allow the vacuum pump to pull down to a ꢀ9.9" Hg vacuum. Evacuating period depends
on pump capacity.
4) Close the low-side valve and high-side valve on the gauge manifold.
5) Disconnect the gauge manifold hose from the vacuum pump and attach it to a
refrigerant service cylinder. Remember to loosen the connection and purge the air
from the hose. For air-cooled and water-cooled models, see the nameplate for the
required refrigerant charge. For remote air-cooled model, see the rating label inside the
icemaker. Hoshizaki recommends only virgin refrigerant or reclaimed refrigerant which
meets ARI Standard 700 (latest edition) be used.
6) A liquid charge is recommended for charging an R-404A system. Invert the service
cylinder and place it on scales. Open the high-side valve on the gauge manifold.
7) Allow the system to charge with liquid until the proper charge weight is met.
8) If necessary, add any remaining charge to the system through the low-side. Use a
throttling valve or liquid dispensing device to add the remaining liquid charge through
the low-side service valve with the unit running.
9) Close the high and low-side service valves. Then, close the high and low-side gauge
manifold valves and disconnect the gauge manifold hoses.
10) Cap the service valves 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. Install the new drier with the arrow on the drier in the direction of the
refrigerant flow.
3. When brazing, protect the drier by using a wet cloth to prevent the drier from
overheating. Do not allow the drier to exceed ꢀ50°F (1ꢀ1°C).
Note: When replacing a compressor with a defective winding, be sure to install the
new start capacitor and start relay supplied with the replacement 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. Do not mix lubricants of different compressors even if both are charged
with R-404A, except when they use the same lubricant.
1) Turn off the power supply.
ꢀ) Remove the panels.
3) Recover the refrigerant and store it in an approved container.
4) Remove the terminal cover on the compressor and disconnect the compressor wiring.
On remote air-cooled models, disconnect the crankcase heater.
5) Remove the discharge, suction, and process pipes.
6) Remove the hold-down bolts, washers, and rubber grommets.
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7) Remove the compressor. Unpack the new compressor package.
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) Remove the drier, then place the new drier in position.
11) Remove the plugs from the suction, discharge, and process pipes.
1ꢀ) Braze all fittings while purging with nitrogen gas flowing at a pressure of 3 to 4 PSIG.
13) Use an electronic leak detector or soap bubbles to check for leaks. Add a trace of
refrigerant to the system (if using an electronic leak detector), and then raise the
pressure using nitrogen gas (140 PSIG). DO NOT use R-404A as a mixture with
pressurized air for leak testing.
14) Evacuate the system and charge it with refrigerant. For air-cooled and water-cooled
models, see the nameplate for the required refrigerant charge. For remote air-cooled
models, see the rating label inside the icemaker.
15) Connect the terminals and replace the terminal cover in its correct position. On remote
air-cooled models, connect the crankcase heater.
16) Replace the panels in their correct positions.
17) Turn on the power supply.
C. Removal and Replacement of Expansion Valve
Moisture in the refrigeration circuit may exceed drier capacity and freeze up at the
expansion valve.
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. Install the new drier with the arrow on the drier in the direction of the
refrigerant flow.
3. When brazing, protect the valve body and drier by using wet cloths to
prevent the valve body and drier from overheating. Do not allow the valve
body or drier to exceed ꢀ50°F (1ꢀ1°C).
1) Turn off the power supply.
ꢀ) Remove the panels.
3) Recover the refrigerant and store it in an approved container.
4) Remove the insulation and the expansion valve bulb on the suction line.
5) Remove the expansion valve cover and disconnect the expansion valve. Place the new
expansion valve in position.
6) Remove the drier, then place the new drier in position.
7) Braze all fittings while purging with nitrogen gas flowing at a pressure of 3 to 4 PSIG.
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8) Use an electronic leak detector or soap bubbles to check for leaks. Add a trace of
refrigerant to the system (if using an electronic leak detector), and then raise the
pressure using nitrogen gas (140 PSIG). DO NOT use R-404A as a mixture with
pressurized air for leak testing.
9) Evacuate the system, and charge it with refrigerant. For air-cooled and water-cooled
models, see the nameplate for the required refrigerant charge. For remote air-cooled
models, see the rating label inside the icemaker.
10) Attach the expansion valve bulb to the suction line in the same location as the previous
bulb. The bulb should be at the 10 or ꢀ o'clock position on the tube. Be sure to secure
the bulb with the clamp and holder and to insulate it.
11) Place the expansion valve cover in position.
1ꢀ) Replace the panels in their correct positions.
13) Turn on the power supply.
D. Removal and Replacement of Hot Gas Valve or Liquid Line Valve
IMPORTANT
1. Always use a copper tube of the same diameter and length when replacing
the valve lines; otherwise, performance may be affected.
ꢀ. Always replace the strainer when replacing the hot gas valve.
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. Install the new drier with the arrow on the drier in the direction of the
refrigerant flow.
3. When brazing, protect the valve body and drier by using wet cloths to
prevent the valve body and drier from overheating. Do not allow the valve
body or drier to exceed ꢀ50°F (1ꢀ1°C).
1) Turn off the power supply.
ꢀ) Remove the panels.
3) Recover the refrigerant and store it in an approved container.
4) Remove the bolt and the solenoid.
5) Disconnect the valve. If replacing the hot gas valve, also remove the strainer.
6) Place the new valve and strainer (if applicable) in position.
7) Remove the drier, then place the new drier in position.
8) Braze all fittings while purging with nitrogen gas flowing at a pressure of 3 to 4 PSIG.
9) Use an electronic leak detector or soap bubbles to check for leaks. Add a trace of
refrigerant to the system (if using an electronic leak detector), and then raise the
pressure using nitrogen gas (140 PSIG). DO NOT use R-404A as a mixture with
pressurized air for leak testing.
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10) Evacuate the system, and charge it with refrigerant. For air-cooled and water-cooled
models, see the nameplate for the required refrigerant charge. For remote air-cooled
models, see the rating label inside the icemaker.
11) Cut the leads of the solenoid allowing enough lead length to reconnect using closed
end connectors.
1ꢀ) Connect the new solenoid leads.
13) Attach the solenoid to the valve body and secure it with the bolt.
14) Replace the panels in their correct positions.
15) Turn on the power supply.
E. 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. Install the new drier with the arrow on the drier in the direction of the
refrigerant flow.
3. When brazing, protect the drier by using a wet cloth to prevent the drier from
overheating. Do not allow the drier to exceed ꢀ50°F (1ꢀ1°C).
1) Turn off the power supply.
ꢀ) Remove the panels and the front and top insulation.
3) Recover the refrigerant and store it in an approved container.
4) Remove the spray tubes. Remove the insulation at the "U" shaped notch where the
refrigeration tubing passes through the molded chassis.
5) Disconnect the evaporator tubing.
6) Remove the pop rivets securing the evaporator, then lift out the evaporator.
7) Install the new evaporator.
8) Remove the drier, then place the new drier in position.
9) Braze all fittings while purging with nitrogen gas flowing at a pressure of 3 to 4 PSIG.
10) Use an electronic leak detector or soap bubbles to check for leaks. Add a trace of
refrigerant to the system (if using an electronic leak detector), and then raise the
pressure using nitrogen gas (140 PSIG). DO NOT use R-404A as a mixture with
pressurized air for leak testing.
11) Evacuate the system, and charge it with refrigerant. For air-cooled and water-cooled
models, see the nameplate for the required refrigerant charge. For remote air-cooled
models, see the rating label inside the icemaker.
1ꢀ) Replace the removed parts in the reverse order of which they were removed.
13) Replace the top insulation and the panels in their correct positions.
14) Turn on the power supply.
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F. Removal and Replacement of Air-Cooled Condenser
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. Install the new drier with the arrow on the drier in the direction of the
refrigerant flow.
3. When brazing, protect the drier by using a wet cloth to prevent the drier from
overheating. Do not allow the drier to exceed ꢀ50°F (1ꢀ1°C).
1) Turn off the power supply.
ꢀ) Remove the panels.
3) Recover the refrigerant and store it in an approved container.
4) Disconnect the condenser inlet and outlet piping.
5) Remove the side frame, then remove the condenser assembly.
6) Remove the shroud from the old condenser and attach it to the new condenser.
7) Install the new condenser assembly, then attach the side frame in its correct position.
8) Remove the drier, then place the new drier in position.
9) Braze all fittings while purging with nitrogen gas flowing at a pressure of 3 to 4 PSIG.
10) Use an electronic leak detector or soap bubbles to check for leaks. Add a trace of
refrigerant to the system (if using an electronic leak detector), and then raise the
pressure using nitrogen gas (140 PSIG). DO NOT use R-404A as a mixture with
pressurized air for leak testing.
11) Evacuate the system, and charge it with refrigerant. See the nameplate for the required
refrigerant charge.
1ꢀ) Replace the panels in their correct positions.
13) Turn on the power supply.
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G. Removal and Replacement of Water-Cooled Condenser
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. Install the new drier with the arrow on the drier in the direction of the
refrigerant flow.
3. When brazing, protect the drier by using a wet cloth to prevent the drier from
overheating. Do not allow the drier to exceed ꢀ50°F (1ꢀ1°C).
1) Turn off the power supply.
ꢀ) Remove the panels.
3) Close the condenser water supply line shut-off valve. If connected to a closed loop
water supply, also close the condenser return outlet shut-off valve.
4) Open the condenser water supply line drain valve. If connected to a closed loop water
supply, also open the condenser return outlet drain valve.
5) Attach a compressed air or carbon dioxide supply to the condenser water supply line
drain valve.
6) Open the water regulating valve by using a screwdriver to pry up on the spring retainer
underneath the spring. While holding the valve open, blow out the condenser using the
compressed air or carbon dioxide supply until water stops coming out.
7) Recover the refrigerant and store it in an approved container.
8) Disconnect the condenser water inlet and outlet piping and the refrigeration inlet and
outlet piping at the condenser.
9) Remove the old condenser and install the new condenser.
10) Remove the drier, then place the new drier in position.
11) Braze all fittings while purging with nitrogen gas flowing at a pressure of 3 to 4 PSIG.
1ꢀ) Use an electronic leak detector or soap bubbles to check for leaks. Add a trace of
refrigerant to the system (if using an electronic leak detector), and then raise the
pressure using nitrogen gas (140 PSIG). DO NOT use R-404A as a mixture with
pressurized air for leak testing.
13) Evacuate the system, and charge it with refrigerant. See the nameplate for the required
refrigerant charge.
14) Close the drain valve(s). Open the condenser water supply line shut-off valve. If
connected to a closed loop water supply, also open the condenser return outlet shut-off
valve.
15) Check for water leaks.
16) Replace the panels in their correct positions.
17) Turn on the power supply.
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H. Removal and Replacement of Remote Air-Cooled Condenser
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. Install the new drier with the arrow on the drier in the direction of the
refrigerant flow.
3. When brazing, protect the drier by using a wet cloth to prevent the drier from
overheating. Do not allow the drier to exceed ꢀ50°F (1ꢀ1°C).
1) Turn off the power supply.
ꢀ) Remove the icemaker panels.
3) Recover the refrigerant and store it in an approved container.
4) Remove the condenser unit panels.
5) Disconnect the condenser inlet and outlet piping.
6) Remove the screws securing the condenser to the base of the unit, then remove the
condenser.
7) Remove the shroud from the condenser and attach to the new condenser.
8) Install the new condenser.
9) Remove the drier (located in the icemaker), then place the new drier in position.
10) Braze all fittings while purging with nitrogen gas flowing at a pressure of 3 to 4 PSIG.
11) Use an electronic leak detector or soap bubbles to check for leaks. Add a trace of
refrigerant to the system (if using an electronic leak detector), and then raise the
pressure using nitrogen gas (140 PSIG). DO NOT use R-404A as a mixture with
pressurized air for leak testing.
1ꢀ) Evacuate the system, and charge it with refrigerant. See the rating label inside the
icemaker for the required refrigerant charge.
13) Replace the panels in their correct positions.
14) Turn on the power supply.
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I. Removal and Replacement of Water Regulating Valve
(water-cooled model)
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. Install the new drier with the arrow on the drier in the direction of the
refrigerant flow.
3. When brazing, protect the drier by using a wet cloth to prevent the drier from
overheating. Do not allow the drier to exceed ꢀ50°F (1ꢀ1°C).
1) Turn off the power supply.
ꢀ) Remove the panels.
3) Close the condenser water supply line shut-off valve. If connected to a closed loop
water supply, also close the condenser return outlet shut-off valve.
4) Open the condenser water supply line drain valve. If connected to a closed loop water
supply, also open the condenser return outlet drain valve.
5) Attach a compressed air or carbon dioxide supply to the condenser water supply line
drain valve.
6) Open the water regulating valve by using a screwdriver to pry up on the spring retainer
underneath the spring. While holding the valve open, blow out the condenser using the
compressed air or carbon dioxide supply until water stops coming out.
7) Recover the refrigerant and store it in an approved container.
8) Disconnect the capillary tube at the condenser outlet.
9) Disconnect the flare-connections of the valve.
10) Remove the screws and the valve from the bracket.
11) Install the new valve.
1ꢀ) Remove the drier, then place the new drier in position.
13) Braze all fittings while purging with nitrogen gas flowing 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-404A as a mixture with
pressurized air for leak testing.
15) Evacuate the system, and charge it with refrigerant. See the nameplate for the required
refrigerant charge.
16) Connect the flare-connections.
17) Close the drain valve(s). Open the condenser water supply line shut-off valve. If
connected to a closed loop water supply, also open the condenser return outlet shut-off
valve.
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18) Check for water leaks.
19) Replace the panels in their correct positions.
ꢀ0) Turn on the power supply.
J. Adjustment of Water Regulating Valve (water-cooled model)
The water regulating valve (also called "water regulator") is factory set, and generally no
adjustment is required. However, when necessary, adjust the water regulator using the
following procedures.
1) Prepare a thermometer to check the condenser drain temperature. Attach a pressure
gauge to the high-side line of the system.
Adjustment Screw
ꢀ) Five minutes after a freeze cycle starts,
confirm that the thermometer reads 104°F
to 115°F (40°C to 46°C). If it does not,
rotate the adjustment screw by using a flat
blade screwdriver until the temperature
is in the proper range. See Fig. ꢀ. Next,
check that the reference pressure is in the
range indicated in the Head Pressure table
in the Performance Data section. If it is not
in the proper range, verify the refrigerant
charge.
CW – Higher
CCW – Lower
Top View
Fig. 2
3) Check that the condenser drain temperature is stable.
K. Removal and Replacement of Headmaster (Condensing Pressure
Regulator - C.P.R.) (remote air-cooled model)
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. Install the new drier with the arrow on the drier in the direction of the
refrigerant flow.
3. When brazing, protect the headmaster and drier by using wet cloths to
prevent the headmaster and drier from overheating. Do not allow the
headmaster or drier to exceed ꢀ50°F (1ꢀ1°C).
1) Turn off the power supply.
ꢀ) Remove the panels from the remote condenser unit.
3) Recover the refrigerant and store it in an approved container.
4) Before heating, break off the stub on the dome to release the dome charge.
5) Disconnect the headmaster.
6) Place the new headmaster in position.
7) Remove the drier, then place the new drier in position.
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8) Braze all fittings with nitrogen gas flowing at a pressure of 3 to 4 PSIG.
9) Use an electronic leak detector or soap bubbles to check for leaks. Add a trace of
refrigerant to the system (if using an electronic leak detector), and then raise the
pressure using nitrogen gas (140 PSIG). DO NOT use R-404A as a mixture with
pressurized air for leak testing.
10) Evacuate the system and charge it with refrigerant. See the rating label inside the
icemaker for the required refrigerant charge.
11) Replace the panels in their correct positions.
1ꢀ) Turn on the power supply.
L. Removal and Replacement of Thermistor
This section covers removal and replacement of the thermistor. For a thermistor check
procedure, see "IV.E. Thermistor Check."
IMPORTANT
1. Fragile; handle very carefully.
ꢀ. Always use the recommended sealant (high thermal conductive type),
Model KE4560RTV manufactured by SHINETSU SILICONE, Part Code
60Y000-11, or Part Code 4A0683-01 equivalent.
3. Always use the recommended foam insulation (non-absorbent type) or
equivalent.
4. Do not shorten or cut the thermistor leads.
1) Turn off the power supply.
Thermistor Lead
Cable Tie
ꢀ) Remove the panels.
3) Remove the control box cover.
4) Disconnect the white thermistor connector
from the control board WHITE K3
connector.
5) Remove the plastic cable ties, foam
insulation, thermistor holder, and
thermistor. See Fig. 3.
Foam Insulation
Thermistor Holder
6) Scrape away the old sealant on the
thermistor holder and the suction pipe.
Fig. 3
7) Wipe off moisture or condensation on the
suction pipe.
8) Smoothly apply recommended sealant (KE4560RTV, Part Code 60Y000-11 or
4A0683-01) to the thermistor holder concave.
9) Attach the new thermistor to the suction pipe in the same position as the previous
thermistor. Be very careful to prevent damage to the leads. Secure it using the
thermistor holder and recommended foam insulation.
10) Secure the insulation using the plastic cable ties.
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11) Connect the white thermistor connector through the bushing of the control box to the
control board WHITE K3 connector.
CAUTION
Do not cut the leads of the thermistor.
1ꢀ) Replace the control box cover and the panels in their correct positions.
13) Turn on the power supply.
M. Removal and Replacement of Fan Motor (air-cooled and
remote air-cooled models)
Note: When replacing a fan motor with defective winding, it is recommended that a new
capacitor be installed.
1) Turn off the power supply.
ꢀ) Remove the panels.
3) Remove the junction box cover from the remote condenser unit (remote air-cooled
model).
4) Disconnect the fan motor wires.
5) Remove the fan motor bracket and fan motor.
6) Install the new fan motor, connect the fan motor wires, and replace the removed parts
in the reverse order of which they were removed.
7) Replace the panels in their correct positions.
8) Replace the junction box cover in its correct position (remote air-cooled models).
9) Turn on the power supply.
N. Removal and Replacement of Inlet Water Valve
1) Turn off the power supply.
ꢀ) Close the icemaker water supply line shut-off valve. Open the icemaker water supply
line drain valve.
3) Remove the front panel.
4) Disconnect the valve outlet tubing by releasing the clamp.
5) Loosen the fitting nut. Be careful not to lose the washer.
6) Disconnect the terminals from the inlet water valve.
7) Remove the bracket and valve from the unit.
8) Install the new valve. Replace the removed parts in the reverse order of which they
were removed. Make sure the washer is in place in the fitting nut.
9) Close the icemaker water supply line drain valve. Open the icemaker water supply line
shut-off valve.
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10) Turn on the power supply.
11) Check for leaks.
1ꢀ) Replace the front panel in its correct position.
13) Turn on the power supply.
Cube Guide
Separator
O. Removal and Replacement of Pump Motor
1) Turn off the power supply.
ꢀ) Remove the front panel and the insulation panel.
Front
Inside of Ice
Dropping Hole
3) Drain the water tank by removing the cap
located on the front bottom part of the ice
dropping hole. See Fig. 4.
Fig. 4
4) Replace the cap in its correct position. Be
careful not to cross thread the cap.
Cap
5) Disconnect the pump suction and discharge hoses.
6) Remove the closed end connectors from
the pump motor leads. Remove the ground
wire.
7) Remove the two screws and the pump motor bracket.
8) Remove the pump housing and check the impeller.
9) If the impeller is defective, install a new impeller.
10) Install the new motor or new parts, and replace the removed parts in the reverse order
of which they were removed. Be sure to reconnect the pump motor ground wire.
11) Turn on the power supply and check for leaks.
1ꢀ) Replace the insulation panel and the front panel in their correct positions.
13) Turn on the power supply.
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P. Removal and Replacement of Control Board
When replacing a control board follow the precautions below.
CAUTION
1. The control board is fragile; handle very carefully.
ꢀ. The control board contains integrated circuits, which are susceptible to
failure due to static discharge. It is especially important to touch the metal
part of the unit before handling or replacing the control board.
3. Do not touch the electronic devices on the control board or the back of the
control board.
4. Do not change wiring and connections. Do not misconnect K3, K4, and K5,
because the same connector is used for the thermistor and float switch. K4
must have the K4 jumper in place for proper operation.
5. Always replace the whole control board assembly if it goes bad.
6. Do not short out power supply to test for voltage.
1) Turn off the power supply.
ꢀ) Remove the front panel and the control box cover.
3) Disconnect the control board connectors from the control board.
4) Remove the control board.
5) Adjust the dip switches on the new control board to the factory default settings. See "II.
C.3.a) Default Dip Switch Settings." CAUTION! Do not adjust S4 dip switch 7 out
of the factory default position on this model. Adjustment outside of the factory
default position may result in damage to the icemaker.
6) Install the new control board taking care not to damage it.
7) Connect the control board connectors to the new control board.
8) Replace the control box cover and front panel in their correct positions.
9) Turn on the power supply.
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VI. Cleaning and Maintenance
IMPORTANT
Ensure all components, fasteners, and thumbscrews are securely in place after
any cleaning or maintenance is done to the equipment.
A. Cleaning and Sanitizing Instructions
Hoshizaki recommends cleaning this icemaker at least once a year. More frequent
cleaning, 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.
ꢀ. Always wear liquid-proof gloves to prevent the cleaning and sanitizing
solutions from coming into contact with skin.
3. Carefully follow any instructions provided with the bottles of cleaning and
sanitizing solution.
4. Never run the icemaker when the water tank is empty.
IMPORTANT
1. The cleaning valve is used to allow solution flow to the inside of the
evaporator during the cleaning and sanitizing operation. It should be closed
for all icemaking operation. The compressor will not operate unless this
valve is completely closed.
ꢀ. To open the cleaning valve, the valve handle should be parallel to the valve
body. To close the valve, the valve handle should be at a right angle to the
valve body.
CLOSED POSITION
OPEN POSITION
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1. Cleaning Procedure
1) Dilute ꢀ7 fl. oz. (800 ml) of recommended cleaner Hoshizaki "Scale Away" or
"LIME-A-WAY" (Economics Laboratory, Inc.) with 5 gal. (19 l) of warm water.
ꢀ) Remove all ice from the evaporator and the storage bin.
Note: To remove cubes on the evaporator, turn off the power supply and turn it on
after 3 minutes. The harvest cycle starts and the cubes will be removed from the
evaporator.
Cube Guide
Separator
3) Turn off the power supply.
4) Remove the front panel, and then remove
the insulation panel by first removing the
thumbscrew, lifting up the panel slightly
and pulling it towards you.
Front
Inside of Ice
Dropping Hole
5) Remove the cap located on the front
bottom part of the ice dropping hole. Drain
the water tank. See Fig. 5.
6) Replace the cap in its correct position. Be
careful not to cross thread it.
Fig. 5
Cap
7) In bad or severe water conditions, clean the float switch assembly as described below.
Otherwise, continue to step 8.
a. Disconnect the vent tube and the flush tube from the top of the float switch, then
remove the float switch assembly from the mounting bracket and remove the
rubber boot from the bottom of the assembly.
b. Remove the retainer rod from the bottom of the float switch assembly, then remove
the float. Be careful not to bend the retainer rod excessively when removing it.
c. Wipe down the float switch assembly's housing, shaft, float, and retainer rod with
cleaning solution. Clean the inside of the rubber boot and hose with cleaning
solution. Rinse the parts thoroughly with clean water.
d. Reassemble the float switch assembly and replace it and the rubber boot in their
correct positions. Reconnect the vent tube and the flush tube.
8) Pour the cleaning solution into the water tank.
9) Fully open the cleaning valve on the left side wall of the machine compartment.
10) Move the control switch on the control box to the "WASH" position.
11) Replace the insulation panel and the front panel in their correct positions.
1ꢀ) Turn on the power supply to start the washing process.
13) Turn off the power supply after 30 minutes.
14) Remove the front panel and the insulation panel.
15) Remove the cap located on the front bottom part of the ice dropping hole. Drain the
water tank. Replace the cap and the insulation panel in their correct positions.
16) Move the control switch to the "ICE" position.
17) Close the cleaning valve.
Note: The icemaker will not operate unless the cleaning valve is completely closed.
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18) Replace the front panel in its correct position.
19) Turn on the power supply to fill the water tank with water.
ꢀ0) Turn off the power supply after 3 minutes.
ꢀ1) Remove the front panel and fully open the cleaning valve.
ꢀꢀ) Move the control switch to the "WASH" position.
ꢀ3) Replace the front panel in its correct position.
ꢀ4) Turn on the power supply to rinse off the cleaning solution.
ꢀ5) Turn off the power supply after 5 minutes.
ꢀ6) Remove the front panel and the insulation panel.
ꢀ7) Remove the cap located on the front bottom part of the ice dropping hole. Drain the
water tank. Replace the cap and the insulation panel in their correct positions.
Note: Do not replace the insulation panel when you proceed to "ꢀ. Sanitizing
Procedure."
ꢀ8) Repeat steps 16 through ꢀ7 three more times to rinse thoroughly.
Note: If you do not sanitize the icemaker, go to step 9 in "ꢀ. Sanitizing Procedure."
2. Sanitizing Procedure - Following Cleaning Procedure
1) Dilute ꢀ.5 fl. oz. (74 ml or 5 tbs) of a 5.ꢀ5% sodium hypochlorite solution (chlorine
bleach) with 5 gal. (19 l) of warm water.
ꢀ) Pour the sanitizing solution into the water tank.
3) Replace the insulation panel and the front panel in their correct positions.
Note: Make sure that the control switch is in the "WASH" position and the cleaning
valve is open.
4) Turn on the power supply to start the sanitizing process.
5) Turn off the power supply after 15 minutes.
6) Remove the front panel and the insulation panel.
7) Remove the cap located on the front bottom part of the ice dropping hole. Drain the
water tank. Replace the cap and the insulation panel in their correct positions.
8) Repeat steps 16 through ꢀ7 in "1. Cleaning Procedure" two times to rinse thoroughly.
9) Close the cleaning valve.
10) Move the control switch to the "ICE" position.
11) Replace the front panel in its correct position.
1ꢀ) Clean the storage bin using a neutral cleaner. Rinse thoroughly after cleaning.
13) Turn on the power supply to start the automatic icemaking process.
8ꢀ
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B. Maintenance Instructions
IMPORTANT
This icemaker must be maintained individually, referring to the instruction
manual and labels provided with the icemaker.
1. Stainless Steel Exterior
To prevent corrosion, wipe the exterior occasionally with a clean, soft cloth. Use a damp
cloth containing a neutral cleaner to wipe off oil or dirt build up.
2. Storage Bin and Scoop
• Wash your hands before removing ice. Use the plastic scoop provided (bin accessory).
• The storage bin is for ice use only. Do not store anything else in the storage bin.
• Clean the scoop and the storage bin liner using a neutral cleaner. Rinse thoroughly
after cleaning.
3. Air Filters (self-contained air-cooled models)
Plastic mesh air filters remove dirt and dust from the air, and keep the condenser from
getting clogged. As the filters get clogged, the icemaker's performance will be reduced.
Check the filters at least twice a month. When clogged, use warm water and a neutral
cleaner to wash the filters.
4. Condenser (self-contained and remote air-cooled models)
Check the condenser once a year, and clean the coil if required by using a brush or
vacuum cleaner. More frequent cleaning may be required depending on location.
C. Preparing the Icemaker for Long Storage
IMPORTANT
When shutting off the icemaker for an extended time, drain out all water from
the water tank and remove the ice from the storage bin. The storage bin should
be cleaned and dried. Drain the icemaker to prevent damage to the water
supply line at sub-freezing temperatures, using air or carbon dioxide. Shut off
the icemaker until the proper ambient temperature is resumed.
When the icemaker is not used for two or three days, it is sufficient to only move the control
switch to the "OFF" position, unless the icemaker will be at sub-freezing temperatures.
1. On water-cooled models only, first remove the water from the water-cooled
condenser:
1) Turn off the power supply and remove the front panel and right side panel.
ꢀ) Close the condenser water supply line shut-off valve. If connected to a closed loop
water supply, also close the condenser return outlet shut-off valve.
3) Open the condenser water supply line drain valve. If connected to a closed loop water
supply, also open the condenser return outlet drain valve.
4) Attach a compressed air or carbon dioxide supply to the condenser water supply line
drain valve.
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5) Open the water regulating valve by using a screwdriver to pry up on the spring retainer
underneath the spring. While holding the valve open, blow out the condenser using the
compressed air or carbon dioxide supply until water stops coming out.
6) Close the drain valve(s) and replace the right side panel in its correct position.
2. Remove the water from the icemaker water supply line:
1) If you have not already done so, turn off the power supply and remove the front panel.
ꢀ) Close the icemaker water supply line shut-off valve and open the icemaker water
supply line drain valve.
3) Allow the line to drain by gravity.
4) Attach a compressed air or carbon dioxide supply to the icemaker water supply line
drain valve.
5) Make sure at least 3 minutes have elapsed since you turned off the power supply.
Make sure the control switch is in the "ICE" position. Replace the front panel in its
correct position and turn on the power supply.
6) Blow the icemaker water supply line out using the compressed air or carbon dioxide
supply.
7) Close the icemaker water supply line drain valve.
3. Drain the water tank:
1) Turn off the power supply and remove the front panel. Move the control switch to the
"OFF" position.
ꢀ) Remove the insulation panel. Remove the cap located on the front bottom part of the
ice dropping hole. Drain the water tank. See Fig. 6.
3) Replace the cap and the insulation panel in their correct positions. Be careful not to
cross thread the cap.
4) Remove all ice from the storage bin. Clean the storage bin using a neutral cleaner.
Rinse thoroughly after cleaning.
5) Replace the insulation panel and the front panel in their correct positions.
Cube Guide
Separator
Front
Inside of Ice
Dropping Hole
Fig. 6
Cap
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