Hoshizaki KM-1301SAH-3, KM-1301SWH-3, KM-1301SRH-3 User Manual

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Hoshizaki America, Inc.

Hoshizaki

Stackable Crescent Cuber

Models KM-1301SAH/3

“A Superior Degree

of Reliability”

www.hoshizaki.com

KM-1301SWH/3 KM-1301SRH/3

SERVICE MANUAL

™

Number: 73169 Issued:1-21-2009 Revised: 8-6-2009

IMPORTANT

Only qualied service technicians should install, service, and maintain the icemaker. No service or maintenance should be undertaken until the technician has thoroughly read this Service Manual. Failure to service and maintain the equipment in accordance with this manual may adversely affect safety, performance, component life, and warranty coverage.

Hoshizaki provides this manual primarily to assist qualied service technicians in the service and maintenance of the icemaker.

Should the reader have any questions or concerns which have not been satisfactorily addressed, please call, write, or send an e-mail message to the Hoshizaki Technical Support Department for assistance.

HOSHIZAKI AMERICA, INC. 618 Highway 74 South Peachtree City, GA 3069

Attn: Hoshizaki Technical Support Department

Phone: 1-800-33-1940 Technical Support (770) 487-331 Fax: 1-800-843-1056 (770) 487-3360 E-mail: techsupport@hoshizaki.com

Web Site: www.hoshizaki.com

NOTE: To expedite assistance, all correspondence/communication MUST include the following information:

• Model Number

• Serial Number

• Complete and detailed explanation of the problem.



IMPORTANT

This manual should be read carefully before the icemaker is serviced or maintenance operations are performed. Only qualied service technicians should install, service, and maintain the icemaker. Read the warnings contained in this booklet carefully as they give important information regarding safety. Please retain this booklet for any further reference that may be necessary.

CONTENTS

Important Safety Information ................................................................................................. 6

I. Specications ..................................................................................................................... 7

A. Icemaker ....................................................................................................................... 7

1. KM-1301SAH (air-cooled) ....................................................................................... 7

. KM-1301SAH3 (air-cooled) ..................................................................................... 8

3. KM-1301SWH (water-cooled) ................................................................................ 9

4. KM-1301SWH3 (water-cooled) ............................................................................. 10

5. KM-1301SRH (remote air-cooled) ......................................................................... 11

6. KM-1301SRH3 (remote air-cooled) ....................................................................... 1

B. Condenser Unit ........................................................................................................... 13

1. URC-14F ............................................................................................................... 13

II. General Information ......................................................................................................... 15

A. Construction ................................................................................................................ 15

1. KM-1301SAH, KM-1301SAH3 (air-cooled) ........................................................... 15

. KM-1301SWH, KM-1301SWH3 (water-cooled) .................................................... 16

3. KM-1301SRH, KM-1301SRH3 (remote air-cooled) .............................................. 17

B. Sequence of Operation ............................................................................................... 18

1. Sequence Cycles and Shutdown .......................................................................... 18

a) 1-Minute Fill Cycle ........................................................................................... 18

b) Initial Harvest Cycle ........................................................................................ 18

c) Freeze Cycle ................................................................................................... 18

d) Pump-Out Cycle ............................................................................................. 19

e) Harvest Cycle ................................................................................................. 19

f) Shutdown .......................................................................................................... 19

. Sequence Flow Chart ............................................................................................ 0

C. Control Board ............................................................................................................. 1

1. Control Board Layout ............................................................................................ 

. Features ................................................................................................................ 3

a) Maximum Water Supply Period - 6 minutes .................................................... 3

b) Harvest Backup Timer and Freeze Timer ........................................................ 3

c) High Temperature Safety ................................................................................. 3

d) Low Water Safety ............................................................................................ 3

e) High Voltage and Low Voltage Cut-outs .......................................................... 3

f) LED Lights and Audible Alarm Safeties ............................................................ 4

3. Controls and Adjustments ..................................................................................... 5

a) Default Dip Switch Settings ............................................................................. 5

b) Harvest Timer (S4 dip switch 1 & ) ................................................................ 5

c) Pump-Out Timer (S4 dip switch 3 & 4) ............................................................ 6

d) Pump-Out Frequency Control (S4 dip switch 5 & 6) ........................................ 6

e) Harvest Pump Timer (S4 dip switch 7) ............................................................ 7

f) Factory Use (S4 dip switch 8) ........................................................................... 7

g) Freeze Timer (S4 dip switch 9 & 10) ............................................................... 7

h) Float Switch Control (S5 dip switch 1) ............................................................ 8

i) Rell Counter (S5 dip switch  through 5) ........................................................ 8

D. Bin Control .................................................................................................................. 9

E. Float Switch ................................................................................................................ 9

F. Thermistor ................................................................................................................... 9

G. Control Switch ............................................................................................................ 9

III. Technical Information ..................................................................................................... 30

A. Water Circuit and Refrigeration Circuit ....................................................................... 30

1. KM-1301SAH, KM-1301SAH3 (air-cooled) ........................................................... 30

. KM-1301SWH, KM-1301SWH3 (water-cooled) .................................................... 31

3. KM-1301SRH, KM-1301SRH3 (remote air-cooled) ............................................... 3

B. Wiring Diagrams ......................................................................................................... 33

1. Auxiliary Code T-0, U-0 ........................................................................................ 33

a) KM-1301SAH (air-cooled) ................................................................................ 33

b) KM-1301SWH (water-cooled) .......................................................................... 34

c) KM-1301SRH (remote air-cooled) ................................................................... 35

d) KM-1301SAH3 (air-cooled) and KM-1301SWH3 (water-cooled) ..................... 36

e) KM-1301SRH3 (remote air-cooled) ................................................................. 37

. Auxiliary Code U-1 and Later ............................................................................... 38

a) KM-1301SAH (air-cooled) ............................................................................... 38

b) KM-1301SWH (water-cooled) ......................................................................... 39

c) KM-1301SRH (remote air-cooled) ................................................................... 40

d) KM-1301SAH3 (air-cooled) and KM-1301SWH3 (water-cooled) ..................... 41

e) KM-1301SRH3 (remote air-cooled) ................................................................. 4

C. Performance Data ...................................................................................................... 43

1. KM-1301SAH (air-cooled) ..................................................................................... 43

. KM-1301SAH3 (air-cooled) ................................................................................... 44

3. KM-1301SWH (water-cooled) .............................................................................. 45

4. KM-1301SWH3 (water-cooled) ............................................................................ 46

5. KM-1301SRH (remote air-cooled) ........................................................................ 47

6. KM-1301SRH3 (remote air-cooled) ....................................................................... 48

IV. Service Diagnosis .......................................................................................................... 49

A. Diagnostic Procedure ................................................................................................ 49

B. Control Board Check .................................................................................................. 53

C. Bin Control Check ....................................................................................................... 54

D. Float Switch Check and Cleaning ............................................................................... 54

1. Float Switch Check ................................................................................................ 54

. Float Switch Cleaning ............................................................................................ 55

E. Thermistor Check ....................................................................................................... 56

F. Diagnostic Charts ........................................................................................................ 57

V. Removal and Replacement of Components ................................................................... 65

A. Service for Refrigerant Lines ...................................................................................... 65

1. Refrigerant Recovery ............................................................................................ 65

. Brazing .................................................................................................................. 66

3. Evacuation and Recharge (R-404A) ..................................................................... 66

B. Removal and Replacement of Compressor ................................................................ 67

C. Removal and Replacement of Expansion Valve......................................................... 68

D. Removal and Replacement of Hot Gas Valve or Liquid Line Valve............................ 69

E. Removal and Replacement of Evaporator .................................................................. 70

F. Removal and Replacement of Air-Cooled Condenser ................................................ 71

G. Removal and Replacement of Water-Cooled Condenser .......................................... 7

H. Removal and Replacement of Remote Air-Cooled Condenser .................................. 73

I. Removal and Replacement of Water Regulating Valve (water-cooled model) ............ 74

J. Adjustment of Water Regulating Valve (water-cooled model) .................................... 75

K. Removal and Replacement of Headmaster (Condensing Pressure Regulator - C.P.R.)

(remote air-cooled model) ......................................................................................... 75

L. Removal and Replacement of Thermistor ................................................................... 76

M. Removal and Replacement of Fan Motor (air-cooled and remote air-cooled models) 77

N. Removal and Replacement of Inlet Water Valve ........................................................ 77

O. Removal and Replacement of Pump Motor................................................................ 78

P. Removal and Replacement of Control Board ............................................................. 79

VI. Cleaning and Maintenance ............................................................................................ 80

A. Cleaning and Sanitizing Instructions ........................................................................... 80

1. Cleaning Procedure ............................................................................................... 81

. Sanitizing Procedure - Following Cleaning Procedure .......................................... 8

B. Maintenance Instructions ............................................................................................ 83

C. Preparing the Icemaker for Long Storage .................................................................. 83

Important Safety Information

Throughout this manual, notices appear to bring your attention to situations which could result in death, serious injury, or damage to the unit.

WARNING Indicates a hazardous situation which could result in death or

serious injury.

CAUTION Indicates a situation which could result in damage to the unit.

IMPORTANT Indicates important information about the use and care of the

unit.

WARNING

This icemaker should be destined only to the use for which it has been expressly conceived. Any other use should be considered improper and therefore dangerous. The manufacturer cannot be held responsible for eventual damage caused by improper, incorrect, and unreasonable use.

To reduce the risk of death, electric shock, serious injury, or re, 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, re, 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 re.

• 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 qualied service personnel to reduce the risk of electric shock, injury, or re.

• Do not make any alterations to the unit. Alterations could result in electric shock, injury, re, or damage to the unit.

I. Specications

AC SUPPLY VOLTAGE 208-230/60/1 (3 wire with neutral for 115V) AMPERAGE 12.4 A ( 5 Min. Freeze AT 104°F / WT 80°F) MINIMUM CIRCUIT AMPACITY 20 A MAXIMUM FUSE SIZE 20 A APPROXIMATE ICE PRODUCTION Ambient WATER TEMP. (°F) PER 24 HR. Temp.(°F) 50 70 90 lbs./day ( kg/day ) 70 *1329 (603) 1281 (581) 1188 (539) Reference without *marks 80 1292 (586) 1217 (552) 1109 (503)

90 1281 (581) *1164 (528) 1060 (481)

100 1253 (568) 1140 (517) 965 (438) SHAPE OF ICE Crescent Cube ICE PRODUCTION PER CYCLE 29.8 lbs. (13.5 kg) 1440pcs. APPROXIMATE STORAGE CAPACITY N/A ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 2180(4.5) 2160(3.9) WATER gal./24HR (gal./100 lbs.) 183(15.7) 605(45.5) CEC/CEE TIER LEVEL 3 ENERGY STAR YES EXTERIOR DIMENSIONS (WxDxH) 48" x 27-3/8" x 27-3/8" (1219 x 695 x 695 mm) EXTERIOR FINISH Stainless Steel, Galvanized Steel (Rear) WEIGHT Net 275 lbs. (125 kg), Shipping 315 lbs. (143 kg) CONNECTIONS - ELECTRIC Permanent - Connection

- WATER SUPPLY Inlet 1/2" FPT

- DRAIN Outlet 3/4" FPT

- CONDENSATE DRAIN 3/8" OD Tube CUBE CONTROL SYSTEM Float Switch HARVESTING CONTROL SYSTEM Hot Gas and Water, Thermistor and Timer ICE MAKING WATER CONTROL Timer Controlled. Overflow Pipe COOLING WATER CONTROL N/A BIN CONTROL SYSTEM Thermostat COMPRESSOR Hermetic, Model CS14K6E-PFV-237 CONDENSER Air-Cooled , Fin and tube type EVAPORATOR Vertical type, Stainless Steel and Copper REFRIGERANT CONTROL Thermostatic Expansion Valve REFRIGERANT CHARGE R404A, 3 lb. 15.5 oz. (1800g) DESIGN PRESSURE High 467PSIG, Low 230PSIG P.C. BOARD CIRCUIT PROTECTION High Voltage Cut-out ( Internal ) COMPRESSOR PROTECTION Auto-reset Overload Protector ( Internal ) REFRIGERANT CIRCUIT PROTECTION Auto-reset High Pressure Control Switch LOW WATER PROTECTION Float Switch ACCESSORIES -SUPPLIED N/A

-REQUIRED Ice Storage Bin OPERATING CONDITIONS VOLTAGE RANGE 187 - 253 V

AMBIENT TEMP. 45 -100° F WATER SUPPLY TEMP. 45 - 90° F

WATER SUPPLY PRESSURE 10 - 113 PSIG

A. Icemaker

1. KM-1301SAH (air-cooled)

Note: We reserve the right to make changes in specications and design without prior

notice.

2. KM-1301SAH3 (air-cooled)

AC SUPPLY VOLTAGE 208-230/60/3 AMPERAGE 9.5 A ( 5 Min. Freeze AT 104°F / WT 80°F) MINIMUM CIRCUIT AMPACITY 20 A MAXIMUM FUSE SIZE 20 A APPROXIMATE ICE PRODUCTION Ambient WATER TEMP. (°F) PER 24 HR. Temp.(°F) 50 70 90 lbs./day ( kg/day ) 70 *1298 (589) 1257 (570) 1162 (527) Reference without *marks 80 1267 (575) 1204 (546) 1086 (493)

90 1257 (570) *1159 (526) 1049 (476)

100 1225 (556) 1133 (514) 947 (430) SHAPE OF ICE Crescent Cube ICE PRODUCTION PER CYCLE 30.4 lbs. (13.8 kg) 1440pcs. APPROXIMATE STORAGE CAPACITY N/A ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 2220(4.6) 2090(3.9) WATER gal./24HR (gal./100 lbs.) 181(15.6) 511(39.4) CEC/CEE TIER LEVEL 3 ENERGY STAR YES EXTERIOR DIMENSIONS (WxDxH) 48" x 27-3/8" x 27-3/8" (1219 x 695 x 695 mm) EXTERIOR FINISH Stainless Steel, Galvanized Steel (Rear) WEIGHT Net 275 lbs. (125 kg), Shipping 315 lbs. (143 kg) CONNECTIONS - ELECTRIC Permanent - Connection

- WATER SUPPLY Inlet 1/2" FPT

- DRAIN Outlet 3/4" FPT

- CONDENSATE DRAIN 3/8" OD Tube CUBE CONTROL SYSTEM Float Switch HARVESTING CONTROL SYSTEM Hot Gas and Water, Thermistor and Timer ICE MAKING WATER CONTROL Timer Controlled. Overflow Pipe COOLING WATER CONTROL N/A BIN CONTROL SYSTEM Thermostat COMPRESSOR Hermetic, Model CS14K6E-TF5-237 CONDENSER Air-Cooled, Fin and tube type EVAPORATOR Vertical type, Stainless Steel and Copper REFRIGERANT CONTROL Thermostatic Expansion Valve REFRIGERANT CHARGE R404A, 3 lb. 15.5 oz. (1800g) DESIGN PRESSURE High 467PSIG, Low 230PSIG P.C. BOARD CIRCUIT PROTECTION High Voltage Cut-out ( Internal ) COMPRESSOR PROTECTION Auto-reset Overload Protector ( Internal ) REFRIGERANT CIRCUIT PROTECTION Auto-reset High Pressure Control Switch LOW WATER PROTECTION Float Switch ACCESSORIES -SUPPLIED N/A

-REQUIRED Ice Storage Bin OPERATING CONDITIONS VOLTAGE RANGE 187 - 253 V

AMBIENT TEMP. 45 -100° F WATER SUPPLY TEMP. 45 - 90° F

WATER SUPPLY PRESSURE 10 - 113 PSIG

Note: We reserve the right to make changes in specications and design without prior

notice.

3. KM-1301SWH (water-cooled)

AC SUPPLY VOLTAGE 208-230/60/1 (3 wire with neutral for 115V) AMPERAGE 8.2 A ( 5 Min. Freeze AT 104°F / WT 80°F) MINIMUM CIRCUIT AMPACITY 20 A MAXIMUM FUSE SIZE 20 A APPROXIMATE ICE PRODUCTION Ambient WATER TEMP. (°F) PER 24 HR. Temp.(°F) 50 70 90 lbs./day ( kg/day ) 70 *1318 (598) 1319 (599) 1249 (567) Reference without *marks 80 1319 (598) 1321 (599) 1211 (549)

90 1319 (599) *1323 (600) 1228 (557)

100 1281 (581) 1301 (590) 1141 (518) SHAPE OF ICE Crescent Cube ICE PRODUCTION PER CYCLE 31 lbs. (14.1 kg) 1440pcs. APPROXIMATE STORAGE CAPACITY N/A ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 1760(3.2) 1740(3.2) WATER gal./24HR (gal./100 lbs.) 257(19.4) 546(41.4) WATER COOLED CONDENSER 1561(118) 861(65)

gal./24HR (gal./100 lbs.) CEC/CEE TIER LEVEL 3 ENERGY STAR N/A EXTERIOR DIMENSIONS (WxDxH) 48" x 27-3/8" x 27-3/8" (1219 x 695 x 695 mm) EXTERIOR FINISH Stainless Steel, Galvanized Steel (Rear) WEIGHT Net 265 lbs. (120 kg), Shipping 315 lbs. (143 kg) CONNECTIONS - ELECTRIC Permanent - Connection

- WATER SUPPLY Inlet 1/2" FPT Cond. Inlet 1/2" FPT

- DRAIN Outlet 3/4" FPT Cond. Outlet 3/8" FPT

- CONDENSATE DRAIN 3/8" OD Tube CUBE CONTROL SYSTEM Float Switch HARVESTING CONTROL SYSTEM Hot Gas and Water, Thermistor and Timer ICE MAKING WATER CONTROL Timer Controlled. Overflow Pipe COOLING WATER CONTROL Water Regulator BIN CONTROL SYSTEM Thermostat COMPRESSOR Hermetic, Model CS12K6E-PFV-237 CONDENSER Water-cooled, Tube in tube type EVAPORATOR Vertical type, Stainless Steel and Copper REFRIGERANT CONTROL Thermostatic Expansion Valve REFRIGERANT CHARGE R404A, 2 lb. 8.2 oz. (1140g) DESIGN PRESSURE High 427PSIG, Low 230PSIG P.C. BOARD CIRCUIT PROTECTION High Voltage Cut-out ( Internal ) COMPRESSOR PROTECTION Auto-reset Overload Protector ( Internal ) REFRIGERANT CIRCUIT PROTECTION Auto-reset High Pressure Control Switch LOW WATER PROTECTION Float Switch ACCESSORIES -SUPPLIED N/A

-REQUIRED Ice Storage Bin OPERATING CONDITIONS VOLTAGE RANGE 187 - 253 V

AMBIENT TEMP. 45 -100° F WATER SUPPLY TEMP. 45 - 90° F WATER SUPPLY PRESSURE 10 - 113 PSIG

Note: We reserve the right to make changes in specications and design without prior

notice.

4. KM-1301SWH3 (water-cooled)

AC SUPPLY VOLTAGE 208-230/60/3 AMPERAGE 6.1 A ( 5 Min. Freeze AT 104°F / WT 80°F) MINIMUM CIRCUIT AMPACITY 20 A MAXIMUM FUSE SIZE 20 A APPROXIMATE ICE PRODUCTION Ambient WATER TEMP. (°F) PER 24 HR. Temp.(°F) 50 70 90 lbs./day ( kg/day ) 70 *1333 (605) 1323 (600) 1246 (565) Reference without *marks 80 1326 (601) 1311 (594) 1198 (544)

90 1323 (600) *1300 (590) 1201 (545)

100 1286 (584) 1277 (579) 1110 (503) SHAPE OF ICE Crescent Cube ICE PRODUCTION PER CYCLE 32.2 lbs. (14.6 kg) 1440pcs. APPROXIMATE STORAGE CAPACITY N/A ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 1840(3.4) 1770(3.2) WATER gal./24HR (gal./100 lbs.) 248(19.1) 557(41.8) WATER COOLED CONDENSER 1547(119) 857(64)

- WATER SUPPLY Inlet 1/2" FPT Cond. Inlet 1/2" FPT

- DRAIN Outlet 3/4" FPT Cond. Outlet 3/8" FPT

- CONDENSATE DRAIN 3/8" OD Tube CUBE CONTROL SYSTEM Float Switch HARVESTING CONTROL SYSTEM Hot Gas and Water, Thermistor and Timer ICE MAKING WATER CONTROL Timer Controlled. Overflow Pipe COOLING WATER CONTROL Water Regulator BIN CONTROL SYSTEM Thermostat COMPRESSOR Hermetic, Model CS12K6E-TF5-237 CONDENSER Water-cooled, Tube in tube type EVAPORATOR Vertical type, Stainless Steel and Copper REFRIGERANT CONTROL Thermostatic Expansion Valve REFRIGERANT CHARGE R404A, 2 lb. 8.2 oz. (1140g) DESIGN PRESSURE High 427PSIG, Low 230PSIG P.C. BOARD CIRCUIT PROTECTION High Voltage Cut-out ( Internal ) COMPRESSOR PROTECTION Auto-reset Overload Protector ( Internal ) REFRIGERANT CIRCUIT PROTECTION Auto-reset High Pressure Control Switch LOW WATER PROTECTION Float Switch ACCESSORIES -SUPPLIED N/A

-REQUIRED Ice Storage Bin OPERATING CONDITIONS VOLTAGE RANGE 187 - 253 V

AMBIENT TEMP. 45 -100° F WATER SUPPLY TEMP. 45 - 90° F WATER SUPPLY PRESSURE 10 - 113 PSIG

Note: We reserve the right to make changes in specications and design without prior

notice.

5. KM-1301SRH (remote air-cooled)

AC SUPPLY VOLTAGE 208-230/60/1 (3 wire with neutral for 115V) AMPERAGE 13.5A ( 5 Min. Freeze AT 104°F / WT 80°F) MINIMUM CIRCUIT AMPACITY 20 A MAXIMUM FUSE SIZE 20 A APPROXIMATE ICE PRODUCTION Ambient WATER TEMP. (°F) PER 24 HR. Temp.(°F) 50 70 90 lbs./day ( kg/day ) 70 *1353 (614) 1315 (596) 1219 (553) Reference without *marks 80 1324 (600) 1264 (573) 1144 (519)

90 1315 (596) *1222 (554) 1110 (504)

100 1281 (581) 1196 (542) 1008 (457) SHAPE OF ICE Crescent Cube ICE PRODUCTION PER CYCLE 31.1 lbs. (14.1 kg) 1440pcs. APPROXIMATE STORAGE CAPACITY N/A ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 2090(4.1) 2010(3.6) WATER gal./24HR (gal./100 lbs.) 203(16.6) 479(35.4) CEC/CEE TIER LEVEL 3 ENERGY STAR YES EXTERIOR DIMENSIONS (WxDxH) 48" x 27-3/8" x 27-3/8" (1219 x 695 x 695 mm) EXTERIOR FINISH Stainless Steel, Galvanized Steel (Rear) WEIGHT Net 255 lbs. (116 kg), Shipping 315 lbs. (143 kg) CONNECTIONS - ELECTRIC Permanent - Connection

- WATER SUPPLY Inlet 1/2" FPT

- DRAIN Outlet 3/4" FPT

Condensing Pressure Regulator on URC-14F

REFRIGERANT CHARGE R404A, 10 lbs. 5.8 oz. (4700g)

(Icemaker 5 lbs. 15.2 oz. Cond. Unit 4 lbs. 6.5 oz.) DESIGN PRESSURE High 467PSIG, Low 230PSIG P.C. BOARD CIRCUIT PROTECTION High Voltage Cut-out ( Internal ) COMPRESSOR PROTECTION Auto-reset Overload Protector ( Internal ) REFRIGERANT CIRCUIT PROTECTION Auto-reset High Pressure Control Switch LOW WATER PROTECTION Float Switch ACCESSORIES -SUPPLIED N/A

-REQUIRED Ice Storage Bin, Remote Condenser Unit OPERATING CONDITIONS VOLTAGE RANGE 187 - 253 V

AMBIENT TEMP. 45 -100° F

WATER SUPPLY TEMP. 45 - 90° F

WATER SUPPLY PRESSURE 10 - 113 PSIG

Note: We reserve the right to make changes in specications and design without prior

notice.

6. KM-1301SRH3 (remote air-cooled)

AC SUPPLY VOLTAGE 208-230/60/3 AMPERAGE 10.7A ( 5 Min. Freeze AT 104°F / WT 80°F) MINIMUM CIRCUIT AMPACITY 20 A MAXIMUM FUSE SIZE 20 A APPROXIMATE ICE PRODUCTION Ambient WATER TEMP. (°F) PER 24 HR. Temp.(°F) 50 70 90 lbs./day ( kg/day ) 70 *1339 (607) 1297 (589) 1203 (546) Reference without *marks 80 1307 (593) 1243 (564) 1127 (511)

90 1297 (589) *1197 (543) 1088 (494)

100 1266 (574) 1171 (531) 988 (448) SHAPE OF ICE Crescent Cube ICE PRODUCTION PER CYCLE 30.7 lbs. (13.9 kg) 1440pcs. APPROXIMATE STORAGE CAPACITY N/A ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 2140(4.3) 2090(3.8) WATER gal./24HR (gal./100 lbs.) 192(16.0) 463(34.6) CEC/CEE TIER LEVEL 3 ENERGY STAR YES EXTERIOR DIMENSIONS (WxDxH) 48" x 27-3/8" x 27-3/8" (1219 x 695 x 695 mm) EXTERIOR FINISH Stainless Steel, Galvanized Steel (Rear) WEIGHT Net 255 lbs. (116 kg), Shipping 315 lbs. (143 kg) CONNECTIONS - ELECTRIC Permanent - Connection

- WATER SUPPLY Inlet 1/2" FPT

- DRAIN Outlet 3/4" FPT

Condensing Pressure Regulator on URC-14F

REFRIGERANT CHARGE R404A, 10 lbs. 5.8 oz. (4700g)

-REQUIRED Ice Storage Bin, Remote Condenser Unit OPERATING CONDITIONS VOLTAGE RANGE 187 - 253 V

AMBIENT TEMP. 45 -100° F

WATER SUPPLY TEMP. 45 - 90° F

WATER SUPPLY PRESSURE 10 - 113 PSIG

Note: We reserve the right to make changes in specications and design without prior

notice.

1

B. Condenser Unit

1. URC-14F

Unit: inches (mm)

SPECIFICATIONS

AC SUPPLY VOLTAGE 115/60/1 (Connection to Icemaker)

FAN MOTOR 115 V Total 2.6FLA 130W

EXTERIOR DIMENSIONS (WxDxH) 35-11/16" x 15-11/16" x 21-15/16" (907.2 x 398 x 557.8 mm)

DIMENSIONS INCLUDING LEGS (WxDxH) 37-13/16" x 18-1/8" x 36-15/16" (960 x 460 x 937.8 mm)

EXTERIOR FINISH Galvanized Steel

WEIGHT Net 80 lbs. ( 36 kg ) Shipping 87 lbs. ( 39 kg )

CONNECTIONS - ELECTRIC Permanent - Connection

- REFRIGERANT 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

FAN MOTOR PROTECTION Thermal Protection

REFRIGERANT CONTROL Condensing Pressure Regulator

REFRIGERANT CHARGE R-404A 4 lb. 7 oz. (2000g)

DESIGN PRESSURE High 467 PSIG

OPERATING CONDITIONS VOLTAGE RANGE 104 ~ 127 V

AMBIENT TEMP. -20 ~ 122 °F

ACCESSORIES -SUPPLIED Leg 2 pcs

Hex. Head Bolt w/Washer 8 x 16 8 pcs

Hex. Nut 8 8 pcs

MODEL: URC-14F

II. General Information

A. Construction

1. KM-1301SAH, KM-1301SAH3 (air-cooled)

Evaporator Assembly

Cleaning Valve

Check Valve (water)

Water Pump

Inlet Water Valve

Spray Tubes

Low-Side Service Valve

High-Side Service Valve

Expansion Valves

Water Supply Inlet

Junction Box

Hot Gas Valve

Check Valves

Air-Cooled Condenser

Control Box

Fan Blade

Float Switch

Compressor

Bin Control Thermostat

Control Switch

Fan Motor

Drier

Liquid Line Valve

Transformer Box (KM-1301SAH3)

2. KM-1301SWH, KM-1301SWH3 (water-cooled)

Evaporator Assembly

Cleaning Valve

Check Valve (water)

Water Pump

Float Switch

Inlet Water Valve

Compressor

Spray Tubes

Low-Side Service Valve

High-Side Service Valve

Expansion Valves

Water Supply Inlet

Junction Box

Hot Gas Valve

Check Valves

Water-Cooled Condenser

Water Regulating Valve

Bin Control Thermostat

Control Switch

Drier

Control Box

Liquid Line Valve

Transformer Box (KM-1301SWH3)

3. KM-1301SRH, KM-1301SRH3 (remote air-cooled)

Evaporator Assembly

Cleaning Valve

Check Valve (water)

Water Pump

Inlet Water Valve

Float Switch

Spray Tubes

Low-Side Service Valve

High-Side Service Valve

High-Side Liquid Service Valve

Water Supply Inlet

Hot Gas Valve

Junction Boxes

Check Valves

Expansion Valves

Receiver Tank

Control Box

Compressor

Bin Control Thermostat

Control Switch

Transformer Box (KM-1301SRH3)

Access Valve

Drier

Liquid Line Valve

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 X relay (auxiliary code T-0 and U-0), X11 relay (auxiliary code U-1 and later) energize and the 1-minute ll 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 ll cycles until water lls 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 X 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, 10, 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 X 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 ll 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)

de-energize. For the rst 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 ows through the small tube to power ush F/S. When the pump-out timer expires, the pump-out is complete.

The rst 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 rst 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

No. 5 No. 6

OFF OFF Every cycle After nd freeze cycle

ON OFF Every  cycles After 3rd freeze cycle

OFF ON Every 5 cycles After 6th freeze cycle

ON ON Every 10 cycles After 11th freeze cycle

Pump-Out

Frequency

1st Pump-Out

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 satised or power is turned off. The unit always

restarts at the 1-minute ll 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–oat switch; HGV–hot gas valve; LLV–liquid line valve; PM–pump motor; WV–inlet water valve

2. Sequence Flow Chart

for  sec., then

10th cycle (S4 dip

• Factory set for every

4. Pump-Out Cycle

reverses for 10/0

switch 5 & 6)

sec. (S4 dip switch

• Pump motor stops

3 & 4)

Comp continues

FMR continues

HGV energized

PM de-energizes for  sec.,

then reverses for 10/0 sec.

FM de-energized

LLV de-energized

F/S in control

(S4 dip switch 9 & 10)

• Minimum freeze time: 5 min.

• Maximum freeze time: freeze timer setting

5-min. timer in

control

3. Freeze Cycle

Harvest Pump

Timer

1 to 3-min. timer in control

(S4 dip switch 1 & )

"G" Control Board Sequence Flow Chart

F/S open or freeze

F/S closed

F/S check

0 or 50 sec.

PM energized

WV de-energized

timer expires

Comp continues

FMR continues

PM continues

FMS energized

LLV energized

HGV de-energized

F/S open

Thermistor temperature

reaches 48°F (9°C)

(3.9 kΩ or less).

Harvest timer starts.

3. Ice Level Lowered

No ice touching

KM-1301SAH/3, KM-1301SWH/3, and KM-1301SRH/3

Thermistor

50 sec. (S4 dip switch 7), whichever is shorter. DO

NOT ADJUST S4 dip switch 7 on this model.

• WV time: 6 min. or the length of harvest minus 0 or

• Maximum harvest time: 0 min.

2. Harvest Cycle

in control

F/S closed

WV continues

Comp energized

FMR energized

HGV energized

2. Icemaker Off

All components

To 1 above

thermostatic bulb.

Icemaker starts at

"1. 1-Minute Fill Cycle."

de-energized.

BC closed

NOTE: Green "BC CLOSED" LED on continuously

when the K4 jumper is in place.

Components Energized when the Control Switch is in the "WASH" Position

The "WASH" position on the control switch is used when cleaning and sanitizing the unit. When in the "WASH" position, power is

supplied to the pump motor. With the cleaning valve closed, the cleaner and sanitizer ow over the outside of the evaporator plate

assembly. With the cleaning valve open, the cleaner and sanitizer ow over both the outside and the inside of the evaporator plate

assembly.

Note: Close the cleaning valve after cleaning and sanitizing are complete, otherwise the unit will not restart when the control

switch is placed in the "ICE" position.

BC-open

All components

de-energized

Fill Cycle

1. 1-Minute

Cycle Steps

F/S check

WV energized

Initial startup

begins here

after 5-sec.

delay

F/S open

If F/S is open, compressor stops and cycle returns to 1-Minute Fill Cycle

1. Bin Full

Within 10 sec.

unit shuts down.

after ice contacts

thermostatic bulb,

Ice contacts

thermostatic bulb

Legend:

BC–bin control

Comp–compressor

FM–fan motor

FMR–fan motor-remote

F/S–oat switch

HGV–hot gas valve

Shutdown

and Restart

BC Operation

LLV–liquid line valve

0

PM–pump motor

WV–inlet water valve

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 oat 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

1. Control Board Layout

"G" Control Board

Bin Control Switch Closed LED (green) (on continuously in thermostatic bin control application)

Bin Control Switch Open LED (yellow) (mechanical bin control application only)

Part Number

Alarm Buzzer

Power LED (red) (lights when power is supplied to the control board)

Relay LEDs (4) (indicate which relays are energized as listed below)

LED  (X Relay) Hot Gas Valve (HGV) Fan Motor (FM) (FM off when LED on)

LED 3 (X3 Relay) Pump Motor (PM) (on at pump-out, harvest (if applicable))

LED 4 (X4 Relay) Inlet Water Valve (WV)

"ALARM RESET" Button

S4 Dip Switch

"OUTPUT TEST" Button (used to test relays on control board)

WHITE K3 Connector Harvest Control (thermistor)

RED K4 Connector K4 Jumper (4A4883G01 thermostatic bin control application) or Mechanical Bin Control

S5 Dip Switch

BLACK K5 Connector Float Switch

Label (control board revision level indicated on label on side of relay)

K1 Ten-Pin Connector

Pins #1 through #10 #1, 9 Magnetic Contactor # Hot Gas Valve (HGV) #3 Liquid Line Valve (LLV), Fan Motor (FM) #4 Pump Motor (icemaking) #5 Pump Motor (pump-out, harvest (if applicable)) #6 Inlet Water Valve (WV) #7, 10 Component Power Supply #8 Open

LED 1 (X1 Relay) Compressor (Comp), Fan Motor-Remote (FMR)

Switch for "C" control board and "ALPINE" control board (service control board only)

K Connector Transformer

Control Board

Part Number A379-01



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 specied 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 17°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 oat switch at the end of the initial 1-minute ll cycle and at the end of each harvest cycle. If the oat switch is in the up position (electrical circuit closed), the control board changes to the next cycle. If the oat switch is in the down position (electrical circuit open), the control board changes to additional 1-minute ll cycles until water enters the tank and closes the oat switch. When the oat 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 insufcient voltage (9Vac±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

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."

Sequence Step LED

1-Minute Fill Cycle 4 WV 1 minute Harvest Cycle 1, 4,  Comp, FMR, WV,

Harvest Pump Timer 1, 3,  Comp, FMR, PM,

Freeze Cycle 1 Comp, FM/FMR,

Pump-Out Cycle 1, 4*, 3,  Comp, FMR, WV*,

Energized

Components

HGV

PM, LLV

PM, HGV

Min. Max. Avg.

 minutes 0 minutes 3 to 5 minutes

0 seconds 50 seconds harvest pump timer

5 minutes freeze timer

10 seconds 0 seconds *pump-out timer

Time LEDs are On

setting 30 to 35 minutes

setting

The built-in safeties shut down the unit and have alarms as listed below.

No. of Beeps

(every 3 sec.)

1 High Evaporator Temp.

(temperature > 17°F) (53°C)

Type of Alarm Notes

Check for harvest problem (stuck HGV or relay), hot water entering unit, stuck HM, or shorted thermistor.

 Harvest Backup Timer

(harvest > 0 min. for two cycles in a row)

3 Freeze Timer

(freeze > specied setting for two cycles in a row) Timer is factory set using S4 dip switch 9 & 10

To reset the above safeties, press the "ALARM RESET" button with the power supply on.

6 Low Voltage

(9Vac±5% or less)

7 High Voltage

(147Vac±5% or more)

Check for open thermistor, HGV not opening, TXV or LLV leaking by, low charge, or inefcient Comp.

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 inefcient Comp.

Red LED will turn off if voltage protection operates. The control voltage safeties automatically reset when voltage is corrected.

Legend: Comp–compressor; FM–fan motor; FMR–fan motor-remote; F/S–oat 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

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. 1 2 3 4 5 6 7 8 9 10

KM-1301SAH/3

KM-1301SWH/3

KM-1301SRH/3

S5 Dip Switch (Do Not Adjust)

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

OFF OFF ON ON ON ON ON OFF OFF OFF

OFF OFF ON ON ON ON ON OFF ON OFF

1 2 3 4 5

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 ush 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

No. 1 No. 2

OFF OFF 60

ON OFF 90

OFF ON 10

ON ON 180

(seconds)

5

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 ows through the small tube to power ush the oat 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.

S4 Dip Switch Setting Time (seconds)

No. 3 No. 4

OFF OFF 10 150 closed

ON OFF 10 180 closed

OFF ON 10 10 open

ON ON 0 180 closed

Inlet Water Valve

T1: Time to drain the water tank T: 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 rst pump-out is dependent on S4 dip switch 5 & 6 settings. The rst pump-out is factory set to occur after the 11th freeze cycle. See the table below.

S4 Dip Switch Setting

No. 5 No. 6

OFF OFF Every cycle After nd freeze cycle

ON OFF Every  cycles After 3rd freeze cycle

OFF ON Every 5 cycles After 6th freeze cycle

ON ON Every 10 cycles After 11th freeze cycle

Pump-Out

Frequency

1st Pump-Out

6

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

No. 7

ON 50

OFF 0

Pump Motor

Time (seconds)

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 specication, 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.

S4 Dip Switch Setting

No. 9 No. 10

OFF OFF 60

OFF ON 50

ON OFF 70

ON ON 60

7

Time

(minutes)

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 oat switch applications. The KM-1301SAH/3, KM1301SWH/3, and KM-1301SRH/3 use a single oat 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 rells during the freeze cycle. The KM-1301SAH/3, KM1301SWH/3, and KM-1301SRH/3 do not rell.

8

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 lled 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 oat switch is used to determine that there is sufcient water in the tank after the 1-minute ll cycle and after each harvest cycle. The oat 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

III. Technical Information

A. Water Circuit and Refrigeration Circuit

1. KM-1301SAH, KM-1301SAH3 (air-cooled)

Check

Valves

Hot Gas

Valve

High Pressure

Switch

Strainer

Water Supply

Inlet Water Valve

Spray Tubes

Condenser

Drier

Fan

Liquid Line

Valve

Thermistor

Cleaning Valve

Suction Line

Service

Valve

Heat Exchanger

Service

Valve

Float Switch

Check Valve

Discharge Line

Compressor

Drain

Expansion Valves

Water Pump

Pump-Out

Evaporator

Spray Tubes

Water

Tank

Freeze/Harvest

Pump Timer

Water Circuit

Refrigeration Circuit

2. KM-1301SWH, KM-1301SWH3 (water-cooled)

Check

Valves

Drain

Water Regulating Valve

Condenser

Water Supply

Drier

Liquid Line

Valve

Thermistor

Cleaning Valve

Hot Gas

Valve

High Pressure

Switch

Suction Line

Heat Exchanger

Service

Valve

Strainer

Service

Valve

Discharge Line

Compressor

Expansion Valves

Water Supply

Inlet Water Valve

Spray Tubes

Evaporator

Float Switch

Check Valve

Water

Tank

Drain

Water Pump

Pump-Out

Freeze/Harvest

Pump Timer

Water Circuit

Refrigeration Circuit

3. KM-1301SRH, KM-1301SRH3 (remote air-cooled)

Check

Valves

Hot Gas

Service

Valve

Fusible Plug

Access Valve

High Pressure

Switch

Valve

Strainer

Condenser

Water

Supply

Inlet Water Valve

Headmaster

(C.P.R.)

Fan

Drier

Receiver Tank

Liquid Line

Valve

Thermistor

Cleaning Valve

Suction Line

Service

Valve

Heat Exchanger

Service

Valve

Float Switch

Check Valve

Discharge Line

Compressor

Expansion Valves

Drain

Water Pump

Spray Tubes

Evaporator

Spray Tubes

3

Water

Tank

Pump-Out

Freeze/Harvest

Pump Timer

Water Circuit

Refrigeration Circuit

B. Wiring Diagrams

1. Auxiliary Code T-0, U-0

a) KM-1301SAH (air-cooled)

Transformer Output

10.5V at 115V

Auxiliary Code T-0, U-0

PSIG

1

* High Pressure Switch

Cut-out 41±

Cut-in 37±1 PSIG

b) KM-1301SWH (water-cooled)

Transformer Output

10.5V at 115V

Auxiliary Code T-0, U-0

PSIG

1

* High Pressure Switch

Cut-out 384±

Cut-in 84±1 PSIG

c) KM-1301SRH (remote air-cooled)

Transformer Output

10.5V at 115V

Auxiliary Code T-0, U-0

PSIG

1

* High Pressure Switch

Cut-out 41±

Cut-in 37±1 PSIG

d) KM-1301SAH3 (air-cooled) and KM-1301SWH3 (water-cooled)

Transformer Output

10.5V at 115V

Auxiliary Code T-0, U-0

PSIG

1

PSIG 384±

1

* High Pressure Switch

Air-Cooled Model Water-Cooled Model

Cut-out 41±

Cut-in 37±1 PSIG 84±1 PSIG

e) KM-1301SRH3 (remote air-cooled)

Transformer Output

10.5V at 115V

Auxiliary Code T-0, U-0

PSIG

1

* High Pressure Switch

Cut-out 41±

Cut-in 37±1 PSIG

2. Auxiliary Code U-1 and Later

a) KM-1301SAH (air-cooled)

Transformer Output

10.5V at 115V

Auxiliary Code U-1 and Later

PSIG

1

* High Pressure Switch

Cut-out 41±

Cut-in 37±1 PSIG

b) KM-1301SWH (water-cooled)

Transformer Output

10.5V at 115V

Auxiliary Code U-1 and Later

PSIG

1

* High Pressure Switch

Cut-out 384±

Cut-in 84±1 PSIG

c) KM-1301SRH (remote air-cooled)

Transformer Output

10.5V at 115V

Auxiliary Code U-1 and Later

PSIG

1

* High Pressure Switch

Cut-out 41±

Cut-in 37±1 PSIG

d) KM-1301SAH3 (air-cooled) and KM-1301SWH3 (water-cooled)

Transformer Output

10.5V at 115V

Auxiliary Code U-1 and Later

PSIG

1

PSIG 384±

0 0

1

* High Pressure Switch

Air-Cooled Model Water-Cooled Model

Cut-out 41±

Cut-in 37±1 PSIG 84±1 PSIG

e) KM-1301SRH3 (remote air-cooled)

Transformer Output

10.5V at 115V

Auxiliary Code U-1 and Later

PSIG

1

* High Pressure Switch

Cut-out 41±

Cut-in 37±1 PSIG

4

C. Performance Data

70/21 1329 603 1281 581 1188 539

80/27 1292 586 1217 552 1109 503

90/32 1281 581 1164 528 1060 481

lbs./day kg./day

100/38 1253 568 1140 517 965 438

70/21

80/27

90/32

watts 100/38

70/21 605 2.29

481 1.82 429 1.62

80/27 510 1.93 318 1.21 331 1.25

90/32 481 1.82 183 0.69 167 0.63

gal./day m3/day

100/38 345 1.30 179 0.68 152 0.58

70/21

80/27

90/32

min. 100/38

70/21

80/27 90/32

min. 100/38

70/21 255 17.9 273 19.2 298 20.9

80/27 269 18.9 297 20.9 321 22.6 90/32 273 19.2 317 22.3 342 24.0

PSIG kg/cm2G

100/38 278 19.5 323 22.7 365 25.7

70/21 50 3.5 50 3.5 53 3.8

80/27 50 3.5 50 3.5 55 3.9 90/32 50 3.5 50 3.5 55 3.8

PSIG kg/cm2G

100/38 52 3.6 51 3.6 59 4.1

20,300 BTU/h [AT 90ºF (32ºC) / WT 70ºF (21ºC)]

2.1

4.7

3.1

3.9

2.9

2.1

4.1

APPROXIMATE ICE PRODUCTION PER 24 HR.

APPROXIMATE ELECTRIC CONSUMPTION

APPROXIMATE WATER CONSUMPTION PER 24 HR.

FREEZING CYCLE TIME

WATER TEMP. (ºF/ºC)

AMBIENT TEMP.

(ºF/ºC) 50/10 70/21 90/32

2193

2166

2174

2180

2197

2160

2164

2166

2222

2257

2253

2320

HARVEST CYCLE TIME

HEAD PRESSURE

3.7

3.1

3.9 2.1

2.1

TOTAL HEAT OF REJECTION FROM CONDENSER

SUCTION PRESSURE

1. KM-1301SAH (air-cooled)

Note:

1. Pressure data is recorded at 5 minutes into freezing cycle. The data not in bold

. We reserve the right to make changes in specications and design without prior

should be used for reference only.

notice.

2. KM-1301SAH3 (air-cooled)

70/21 1298 589 1257 570 1162 527

80/27 1267 575 1204 546 1086 493

90/32 1257 570 1159 526 1049 476

lbs./day kg./day

100/38 1225 556 1133 514 947 430

70/21

80/27

90/32

watts 100/38

70/21 511 1.94

415 1.57 367 1.39

80/27 438 1.66 287 1.09 286 1.08

90/32 415 1.57 181 0.68 159 0.60

gal./day m3/day

100/38 305 1.15 176 0.67 139 0.53

70/21

80/27

90/32

min. 100/38

70/21

80/27 90/32

min. 100/38

70/21 254 17.9

272 19.1 296 20.8

80/27 268 18.8 295 20.8 319 22.4 90/32 272 19.1 315 22.1 339 23.8

PSIG kg/cm2G

100/38 276 19.4 321 22.5 361 25.4

70/21 48 3.4 49 3.4 52 3.6

80/27 49 3.4 50 3.5 54 3.8 90/32 49 3.4 51 3.6 55 3.8

PSIG kg/cm2G

100/38 50 3.5 52 3.6 58 4.1

20,200 BTU/h [AT 90ºF (32ºC) / WT 70ºF (21ºC)]

2.1

4.2

2.9

3.6

2.8

2.1

3.8

APPROXIMATE ICE PRODUCTION PER 24 HR.

APPROXIMATE ELECTRIC CONSUMPTION

APPROXIMATE WATER CONSUMPTION PER 24 HR.

FREEZING CYCLE TIME

WATER TEMP. (ºF/ºC)

AMBIENT TEMP.

(ºF/ºC) 50/10 70/21 90/32

2123

2128

2178

2220

2224

2090

2119

2128

2152

2187

2236

2250

HARVEST CYCLE TIME

HEAD PRESSURE

3.4

2.9

3.6 2.1

2.1

TOTAL HEAT OF REJECTION FROM CONDENSER

SUCTION PRESSURE

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 specications and design without prior

notice.

3. KM-1301SWH (water-cooled)

70/21 1318 598 1319 599 1249 567 80/27 1319 598 1321 599 1211 549

90/32 1319 599 1323 600 1228 557

lbs./day kg./da

100/38 1281 581 1301 590 1141 518

70/21

80/27 90/32

watts 100/38

70/21 1407 5.33 1527 5.78 2049 7.76

80/27 1499 5.67 1686 6.38 2406 9.11

90/32 1527 5.78 1818 6.88 2465 9.33

gal./day m3/day

100/38 1861 7.04 1969 7.46 3060 11.58

70/21 80/27

90/32

min. 100/38

70/21

80/27 90/32

min. 100/38

70/21 235 16.5 236 16.6 246 17.3 80/27 236 16.6 237 16.7 253 17.8

90/32 236 16.6 238 16.7 252 17.7

PSIG kg/cm2G

100/38 241 16.9 241 17.0 264 18.6

70/21 50 3.5 50 3.5 52 3.6

80/27 50 3.5 49 3.5 52 3.7 90/32 50 3.5 49 3.4 52 3.6

PSIG kg/cm2G

100/38 51 3.6 50 3.5 54 3.8

17,600 BTU/h [AT 90ºF (32ºC) / WT 70ºF (21ºC)]

TOTAL HEAT OF REJECTION FROM COMPRESSOR 2,300 BTU/h [AT 90ºF (32ºC) / WT 70ºF (21ºC)] WATER FLOW FOR CONDENSER 120 gal./h [AT 100ºF (38ºC) / WT 90ºF (32ºC)]

PRESSURE DROP OF COOLING WATER LINE less than 10 PSIG

31 32

2.4

4.5

3.2

3.9

3.1

APPROXIMATE ICE PRODUCTION PER 24 HR.

APPROXIMATE ELECTRIC CONSUMPTION

APPROXIMATE WATER CONSUMPTION PER 24 HR.

FREEZING CYCLE TIME

WATER TEMP. (ºF/ºC)

AMBIENT TEMP.

(ºF/ºC)

50/10 70/21 90/32

1755

1746

1754

1760

1766

1740

1744 1746

33 34

1767

1782 1786

1810

HARVEST CYCLE TIME

3.5

3.0

3.9 2.22.4

4.0

2.1

TOTAL HEAT OF REJECTION FROM CONDENSER

SUCTION PRESSURE

HEAD PRESSURE

Note:

1. Pressure data is recorded at 5 minutes into freezing cycle. The data not in bold

. We reserve the right to make changes in specications and design without prior

should be used for reference only.

notice.

4. KM-1301SWH3 (water-cooled)

70/21 1333 605 1323 600 1246 565 80/27 1326 601 1311 594 1198 544

90/32 1323 600 1300 590 1201 545

lbs./day kg./da

100/38 1286 584 1277 579 1110 503

70/21

80/27 90/32

watts 100/38

70/21 1414 5.35 1526 5.78 2036 7.71

80/27 1499 5.68 1673 6.33 2382 9.02

90/32 1526 5.78 1795 6.80 2431 9.20

gal./day m3/day

100/38 1846 6.99 1944 7.36 3015 11.41

70/21 80/27

90/32

min. 100/38

70/21

80/27 90/32

min. 100/38

70/21 237 16.7 238 16.7 249 17.5 80/27 238 16.7 239 16.8 256 18.0

90/32 238 16.7 240 16.9 255 17.9

PSIG kg/cm2G

100/38 244 17.1 244 17.1 269 18.9

70/21 50 3.5 50 3.5 52 3.7

80/27 50 3.5 49 3.5 53 3.7 90/32 50 3.5 49 3.4 52 3.7

PSIG kg/cm2G

100/38 51 3.6 50 3.5 55 3.9

17,400 BTU/h [AT 90ºF (32ºC) / WT 70ºF (21ºC)]

TOTAL HEAT OF REJECTION FROM COMPRESSOR 2,300 BTU/h [AT 90ºF (32ºC) / WT 70ºF (21ºC)] WATER FLOW FOR CONDENSER 119 gal./h [AT 100ºF (38ºC) / WT 90ºF (32ºC)]

PRESSURE DROP OF COOLING WATER LINE less than 10 PSIG

2.1

TOTAL HEAT OF REJECTION FROM CONDENSER

SUCTION PRESSURE

HEAD PRESSURE

3.5

3.0

3.8 2.22.4

4.0

HARVEST CYCLE TIME

1805

1824 1850

1860

32 33

1789

1791

1818

1840

1842

1770

1786 1791

WATER TEMP. (ºF/ºC)

AMBIENT TEMP.

(ºF/ºC)

50/10 70/21 90/32

APPROXIMATE ICE PRODUCTION PER 24 HR.

APPROXIMATE ELECTRIC CONSUMPTION

APPROXIMATE WATER CONSUMPTION PER 24 HR.

FREEZING CYCLE TIME

31 32

2.3

4.5

3.1

3.8

3.0

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 specications and design without prior

notice.

5. KM-1301SRH (remote air-cooled)

70/21 1353 614 1315 596 1219 553 80/27 1324 600 1264 573 1144 519

90/32 1315 596 1222 554 1110 504

lbs./day kg./da

100/38 1281 581 1196 542 1008 457

70/21

80/27

90/32

watts 100/38

70/21 479 1.81

398 1.51 350 1.32

80/27 417 1.58 292 1.10 278 1.05

90/32 398 1.51 203 0.77 173 0.66

gal./day m3/day

100/38 303 1.15 196 0.74 146 0.55

70/21 80/27

90/32

min. 100/38

70/21

80/27 90/32

min. 100/38

70/21 211 14.8 226 15.9 246 17.3 80/27 222 15.6 246 17.3 265 18.7

90/32 226 15.9 262 18.4 282 19.9

PSIG kg/cm2G

100/38 230 16.2 267 18.8 301 21.2

70/21 50 3.5 51 3.6 53 3.8

80/27 50 3.5 51 3.6 55 3.9 90/32 51 3.6 52 3.7 56 3.9

PSIG kg/cm2G

100/38 52 3.6 53 3.7 59 4.1

17,600 BTU/h [AT 90ºF (32ºC) / WT 70ºF (21ºC)]

2,500 BTU/h [AT 90ºF (32ºC) / WT 70ºF (21ºC)]

CONDENSER VOLUME 133 CU. IN (URC-14F)

32 33

2.3

4.1

3.0

3.6

2.9

2.3

3.7

APPROXIMATE ICE PRODUCTION PER 24 HR.

APPROXIMATE ELECTRIC CONSUMPTION

APPROXIMATE WATER CONSUMPTION PER 24 HR.

FREEZING CYCLE TIME

WATER TEMP. (ºF/ºC)

AMBIENT TEMP.

(ºF/ºC)

50/10 70/21 90/32

2052

2033

2064

2090

2105

2010

2028

2033

34 36

2088

2131

2153

2210

2.1

SUCTION PRESSURE

HARVEST CYCLE TIME

HEAD PRESSURE

3.3

2.9

3.6 2.2

TOTAL HEAT OF REJECTION FROM CONDENSER

TOTAL HEAT OF REJECTION FROM COMPRESSOR

Note:

1. Pressure data is recorded at 5 minutes into freezing cycle. The data not in bold

. We reserve the right to make changes in specications and design without prior

should be used for reference only.

notice.

6. KM-1301SRH3 (remote air-cooled)

70/21 1339 607 1297 589 1203 546 80/27 1307 593 1243 564 1127 511

90/32 1297 589 1197 543 1088 494

lbs./day kg./da

100/38 1266 574 1171 531 988 448

70/21

80/27

90/32

watts 100/38

70/21 463 1.75

384 1.45 338 1.28

80/27 403 1.52 279 1.06 269 1.02

90/32 384 1.45 192 0.72 165 0.63

gal./day m3/day

100/38 291 1.10 185 0.70 141 0.53

70/21 80/27

90/32

min. 100/38

70/21

80/27 90/32

min. 100/38

70/21 214 15.0

228 16.0 252 17.7 80/27 224 15.8 246 17.3 273 19.2

90/32 228 16.0 261 18.4 287 20.2

PSIG kg/cm2G

100/38 234 16.5 267 18.8 311 21.9

70/21 50 3.5 51 3.6 54 3.8

80/27 50 3.5 51 3.6 56 3.9 90/32 51 3.6 52 3.7 56 3.9

PSIG kg/cm2G

100/38 52 3.7 53 3.7 60 4.2

17,500 BTU/h [AT 90ºF (32ºC) / WT 70ºF (21ºC)]

2,400 BTU/h [AT 90ºF (32ºC) / WT 70ºF (21ºC)]

CONDENSER VOLUME 133 CU. IN (URC-14F)

32 34

2.2

3.9

2.9

3.4

2.8

2.2

3.5

APPROXIMATE ICE PRODUCTION PER 24 HR.

APPROXIMATE ELECTRIC CONSUMPTION

APPROXIMATE WATER CONSUMPTION PER 24 HR.

FREEZING CYCLE TIME

WATER TEMP. (ºF/ºC)

AMBIENT TEMP.

(ºF/ºC)

50/10 70/21 90/32

2128

2105

2124

2140

2156

2090

2101

2105

35 37

2160

2199

2208

2270

2.1

SUCTION PRESSURE

HARVEST CYCLE TIME

HEAD PRESSURE

3.2

2.8

3.4 2.1

TOTAL HEAT OF REJECTION FROM CONDENSER

TOTAL HEAT OF REJECTION FROM COMPRESSOR

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 specications and design without prior

notice.

IV. Service Diagnosis

WARNING

1. This unit should be diagnosed and repaired only by qualied service personnel to reduce the risk of death, electric shock, serious injury, or re.

. 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 exible. 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), conrm 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.

3) 1-Minute Fill Cycle – LED 4 is on. WV and X relay (auxiliary code T-0, U-0), X11 relay (auxiliary code U-1 and later) energize and the 1-minute ll 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 ll cycles until water lls 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, conrm the screen or external lter isn't plugged (no water ow). 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 X 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, 10, 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 ll 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 X 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 ll 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 efciency, 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 ll cycle starts, see "IV.D. Float Switch Check and Cleaning."

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 rst 5 minutes of freeze, conrm 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 ll 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 rst pump-out is dependent on S4 dip switch 5 & 6 settings. See the table below

S4 Dip Switch Setting

No. 5 No. 6

OFF OFF Every cycle After nd freeze cycle

ON OFF Every  cycles After 3rd freeze cycle

OFF ON Every 5 cycles After 6th freeze cycle

ON ON Every 10 cycles After 11th freeze cycle

Pump-Out

Frequency

1st Pump-Out

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 X 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–oat 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

5

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 ll 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 exible. 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 K 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."

C. Bin Control Check

To check the thermostatic bin control, follow the steps below.

CAUTION

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

1. Float Switch Check

To check the oat 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 oat switch connector from the control board BLACK K5 connector.

7) Check for continuity across the oat switch leads. With the water tank empty, the oat switch should be open. If open, continue to step 8. If closed, follow the steps in "IV. D.. Float Switch Cleaning." After cleaning the oat switch, check it again. Replace if necessary.

8) Reconnect the black oat 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 ll cycle should end and the initial harvest cycle should begin. If the initial harvest cycle begins, the oat 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.

1) Move the control switch to the "OFF" position.

13) Remove the control box cover.

14) Disconnect the black oat switch connector from the control board BLACK K5 connector.

15) Check for continuity across the oat switch leads. With the water tank full, the oat switch should be closed. If the oat switch is closed and the icemaker will not switch from the 1-minute ll cycle to the initial harvest cycle, replace the control board.

If open, conrm that the water tank is full. If the tank is not full, check the water supply, water lters, and inlet water valve. If the tank is full, follow the steps in "IV.D.. Float Switch Cleaning." After cleaning the oat switch, check it again. Replace if necessary.

2. Float Switch Cleaning

Depending on local water conditions, scale may build up on the oat switch. Scale on the switch can cause the oat to stick. In this case, the oat switch should be cleaned.

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

Vent

careful not to cross thread it.

5) Disconnect the vent tube and the ush

Flush

tube from the top of the oat switch, then remove the oat switch assembly from the mounting bracket and remove the rubber

Shaft

boot from the bottom of the oat switch assembly. See Fig. 1.

Float Switch Housing

6) Remove the retainer rod from the bottom of the oat switch assembly, then remove the

Float

oat. Be careful not to bend the retainer rod excessively when removing it.

Retainer Rod

Rubber Boot and Hose

Fig. 1

7) Wipe down the oat switch assembly's housing, shaft, oat, 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 oat switch assembly and replace it and the rubber boot in their correct positions. Reconnect the vent tube and the ush 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.

1) 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."

F. Diagnostic Charts

1. No Ice Production

Problem Possible Cause Remedy

[1] The icemaker will not

start.

a) Power Supply 1. Off, blown fuse, or

tripped breaker.

Loose connection. . Tighten.

.

3. Bad contacts. 3. Check for continuity and

4. Not within specications.

b) Transformer (115V

primary) (3 phase only)

c) Water Supply 1. Water supply off or

d) Thermostatic Bin

Control

e) Fuse (Control Box) 1. Blown. 1. Check for short circuit and

f) Control Switch 1. "OFF" or "WASH"

g) High Pressure Control 1. Bad contacts. 1. Check for continuity and

1. Voltage tap switch does not match incoming voltage.

Coil winding open or

.

shorted.

pressure too low.

1. Tripped with bin lled with ice.

. Ambient temperature

too cool.

3. Set too warm. 3. See "IV.C. Bin Control

4. Bulb out of position. 4. Place in position.

5. Bad contacts. 5. Check for continuity and

position.

. Bad contacts. . Check for continuity and

Dirty air lter or

.

condenser.

3. Ambient or condenser water temperature too warm.

4. Refrigerant overcharged.

5. Fan not operating (except water-cooled model).

6. Refrigerant lines or components plugged.

7. Condenser water pressure too low or off (water-cooled model).

1. Turn on, replace, or reset.

replace.

4. Refer to nameplate and correct.

1. Verify incoming voltage, move switch to proper setting.

. Replace.

1. Check and get recommended pressure.

1. Remove ice.

. Increase ambient

temperature.

Check."

replace.

1. Move to "ICE" position.

replace.

. Clean.

3. Reduce temperature.

4. Recover, evacuate, and recharge.

5. See chart 1.[7].

6. Clean and replace drier.

7. Check and get recommended pressure.

Problem Possible Cause Remedy

[1] The icemaker will not

start. (continued)

Fill cycle will not

[]

terminate.

h) Transformer 1. Coil winding open or

shorted.

i) Wiring to Control Board 1. Loose connections or

open.

j) Interlock Switch

(Cleaning Valve)

k) Thermistor 1. Leads shorted or open

l) Hot Gas Valve 1. Continues to open

m)Control board green

"BC CLOSED" LED off and/or yellow "BC OPEN" LED on

n) Inlet Water Valve 1. Mesh lter or orice

o) Float Switch 1. Bad contacts. 1. Check for continuity and

p) Control Board 1. Defective or in alarm. 1. See "IV.B. Control Board

a) Water Supply 1. Water supply off or

b) Float Switch 1. Connector

c) Control Board 1. Defective. 1. See "IV.B. Control Board

1. Open position. 1. Move to closed position.

Bad contacts. . Check for continuity and

.

and high temperature or harvest backup timer safety operates (1 beep or  beep alarm).

in freeze cycle and freeze timer safety operates (3 beep alarm).

1. K4 jumper missing or open.

gets clogged and water supply cycle does not nish.

Coil winding open. . Replace.

.

3. Wiring to inlet water valve.

Float does not move

.

freely.

pressure too low.

disconnected.

Defective switch. . Clean or replace. See "IV.

.

3. Float does not move freely or switch defective.

1. Replace.

1. Check for continuity and replace.

replace.

1. See "IV.E. Thermistor Check."

1. Check for hot gas valve stuck open and replace.

1. Conrm jumper is in place. Check for continuity.

1. Clean.

3. Check for loose connection or open, and replace.

replace.

. Clean or replace. See "IV.

D. Float Switch Check and Cleaning."

Check."

1. Check and get recommended pressure.

1. Reconnect.

D. Float Switch Check and Cleaning."

. Clean or replace. See "IV.

D. Float Switch Check and Cleaning."

Check."

Problem Possible Cause Remedy

[3] Compressor will

not start or stops operating.

[4] Water continues to

be supplied in freeze cycle.

[5] Water pump will not

start.

[6] Freeze cycle time is

too short.

a) Magnetic Contactor 1. Bad contacts. 1. Check for continuity and

replace.

Coil winding open. . Replace.

.

b) Start Capacitor or Run

Capacitor

c) Internal Overload

Protector Open (check 1 through 3 to the right and d through f below)

d) Starter 1. Bad contacts. 1. Check and replace.

e) Compressor 1. Power supply not

f) Control Board 1. No power to contactor. 1. See "IV.B. Control Board

a) Water Pressure 1. Too high. 1. Reduce.

b) Inlet Water Valve 1. Diaphragm does not

c) Control Board 1. Defective. 1. See "IV.B. Control Board

a) Pump Motor 1. Motor winding open. 1. Replace.

b) Control Board 1. Defective. 1. See "IV.B. Control Board

c) Control Switch 1. Bad contacts. 1. Replace.

a) Pump-Out Check Valve 1. Leaking by. 1. Clean or replace.

b) Float Switch 1. Dirty or erratic

c) Control Board 1. Defective. 1. See "IV.B. Control Board

d) Water System 1. Water leaks. 1. Check connections for

1. Defective. 1. Replace.

1. Loose terminal. 1. Tighten or replace.

Voltage. . Check and correct.

.

3. Dirty condenser. 3. Clean.

Coil winding open. . Replace.

.

1. Refer to nameplate and

within specications.

Wiring to compressor. . Check for loose connection

.

3. Defective. 3. Replace.

4. Protector tripped. 4. Reduce temperature.

close.

Bearing worn out. . Replace.

.

3. Wiring to pump motor. 3. Check for loose connection

4. Defective capacitor. 4. Replace.

5. Defective or bound impeller.

6. Mechanical seal worn out.

operation.

correct.

or open, and replace.

Check."

1. Check for water leaks with icemaker off.

Check."

or open, and replace.

5. Replace and clean.

6. Check and replace.

Check."

1. Clean or replace. See "IV. D. Float Switch Check and Cleaning."

Check."

water leaks, and replace.

Problem Possible Cause Remedy

[7] Fan motor will

not start, or is not operating (except water-cooled model).

[8] All components

run, but no ice is produced.

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. 4. Replace.

5. Fan blade bound. 5. Check and replace.

b) Control Board 1. Defective. 1. See "IV.B. Control Board

Check."

a) Refrigerant 1. Low charge. 1. Check for leaks. Recover,

repair, evacuate, and recharge.

Air or moisture

.

trapped.

b) Compressor 1. Defective. 1. Replace.

c) Hot Gas Valve 1. Continues to open in

freeze cycle.

d) Liquid Line Valve

(if applicable)

e) Inlet Water Valve 1. Inlet water valve is

f) Expansion Valve 1. Bulb loose. 1. Secure bulb.

g) Headmaster (C.P.R.)

(remote condenser unit)

h) Water Supply Line

(water-cooled model)

i) Water Regulating Valve

(water-cooled model)

1. Continues to close in

freeze cycle.

wide open during freeze.

Operating erratically. . Check and replace.

.

1. Not operating properly

and liquid line temperature too warm.

1. Condenser water

pressure too low or off and high pressure control opens and closes frequently.

1. Set too high. 1. Adjust or replace. See

. Replace drier, evacuate,

and recharge.

1. Check and replace.

1. Check for water leaks with icemaker off.

1. Replace headmaster.

1. Check and get recommended pressure.

"V.J. Adjustment of Water Regulating Valve."

2. Evaporator is Frozen Up

Problem Possible Cause Remedy

[1]Freeze cycle time is

too long.

a) Inlet Water Valve 1. Diaphragm does not

close.

b) Float Switch 1. Float does not move

freely or defective switch.

c) Evaporator 1. Scaled up. 1. Clean.

Damaged. . Replace.

.

d) Spray Tubes 1. Dirty. 1. Clean.

Out of position. . Place in position.

.

e) Water Pump 1. RPM too slow. 1. See chart 1.[5].

1. Check for water leaks with icemaker off.

1. Clean or replace. See "IV. D. Float Switch Check and Cleaning."

Problem Possible Cause Remedy

[1]Freeze cycle time is

too long. (continued)

All ice formed on

[]

evaporator does not fall into bin in harvest cycle.

f) Thermistor 1. Loose or

disconnected.

g) Refrigerant Charge 1. Low charge. 1. Check for leaks. Recover,

h) Expansion Valve 1. Bulb loose. 1. Secure bulb.

Operating erratically. . Check and replace.

.

i) Control Board 1. Defective. 1. See "IV.B. Control Board

a) Evaporator 1. Scaled up. 1. Clean.

Damaged. . Replace.

.

b) Ambient and/or Water

Temperature

c) Water Supply Line 1. Water pressure too

d) Water System 1. Water supply line

e) Inlet Water Valve 1. Dirty mesh lter or

f) Spray Tubes 1. Dirty. 1. Clean.

g) Thermistor 1. Loose or

h) Hot Gas Valve 1. Coil winding open. 1. Replace.

i) Expansion Valve 1. Open. 1. Check and replace.

j) Liquid Line Valve

(if applicable)

k) Control Board 1. Harvest timer is set

l) Refrigerant Charge 1. Low Charge 1. Check for leaks. Recover,

m)Water Regulating Valve

(water-cooled model)

1. Too cool. 1. Increase temperature.

low.

too small; requires 1/" OD line dedicated per machine.

Water lter clogged or

.

ow rate too small.

orice.

Diaphragm does not

.

close.

Out of position. . Place in position.

.

disconnected.

Plunger does not

.

move.

3. Wiring to hot gas valve.

1. Continues to open in harvest cycle.

too short.

Defective. . See "IV.B. Control Board

.

1. Leaking by in harvest. 1. Check and replace.

1. Reattach or connect. See "IV.E. Thermistor Check."

repair, evacuate, and recharge.

Check."

1. Check and get recommended pressure.

1. Increase water line size.

. Replace lter or install a

higher ow rate lter.

1. Clean.

. Check for water leaks with

icemaker off.

1. Reattach or connect. See "IV.E. Thermistor Check."

. Replace.

3. Check for loose connection or open, and replace.

1. Check operation in harvest cycle and replace.

1. Adjust longer, referring to "II.C.3.b) Harvest Timer (S4 dip switch 1 & )."

Check."

repair, evacuate, and recharge.

Problem Possible Cause Remedy

[3]Other. a) Ice Cube Guide 1. Out of position. 1. Place in position.

b) Thermostatic Bin

Control

1. Bulb out of position. 1. Place in position.

Bad contacts. . See "IV.C. Bin Control

.

Check."

3. Low Ice Production

Problem Possible Cause Remedy

[1] Freeze cycle time is

long.

a) Inlet Water Valve 1. Diaphragm does not

close.

b) Float Switch 1. Float switch does

not move freely or defective switch.

c) Evaporator 1. Scaled up. 1. Clean.

Damaged. . Replace.

.

d) Spray Tubes 1. Dirty. 1. Clean.

. Out of position. . Place in position.

e) Water Pump 1. RPM too slow. 1. See chart 1.[5].

f) Condenser (except

water-cooled model)

g) Refrigerant Charge 1. Low charge. 1. Check for leaks. Recover,

h) Hot Gas Valve 1. Open. 1. Check and replace.

i) Expansion Valve 1. Bulb loose. 1. Secure bulb.

j) Compressor 1. Erratic or off. 1. See chart 1.[3].

k) Condenser Water

(water-cooled model)

l) Liquid Line Valve 1. Erratic, sticking. 1. Check and replace.

m)Headmaster (C.P.R.)

(remote condenser unit)

n) Control Board 1. Float switch

1. Air lter or condenser clogged.

Operating erratically. . Check and replace.

.

1. Water regulating valve set too high.

Condenser water

.

pressure too low.

3. Water temperature out of specication.

1. Bypassing. 1. Replace.

connection loose (K5).

. Defective. . See "IV.B. Control Board

1. Check for water leaks with icemaker off.

1. Clean or replace. See "IV. D. Float Switch Check and Cleaning."

1. Clean.

repair, evacuate, and recharge.

1. Adjust or replace. See "V.J. Adjustment of Water Regulating Valve."

. Check and get

recommended pressure.

3. Correct to specication.

1. Check and reconnect.

Check."

6

Problem Possible Cause Remedy

[]

Harvest cycle time is long.

a) Water Supply 1. Water temperature too

cold.

b) Thermistor 1. Out of position or

defective.

c) Control Board 1. Not reading

thermistor.

Sending voltage to

.

liquid line valve (if applicable) in harvest.

d) Inlet Water Valve 1. Clogged. 1. Clean or replace.

e) Evaporator 1. Scaled up. 1. Clean.

f) Hot Gas Valve 1. Does not open, or

opens partially.

g) Expansion Valve 1. Wide open in harvest. 1. Check and replace.

h) Water Regulating Valve

(water-cooled model)

i) Liquid Line Valve (if

applicable)

1. Open during harvest. 1. Adjust or replace. See

1. Open during harvest cycle.

1. Increase temperature.

1. Reattach and secure. See "V.L. Removal and Replacement of Thermistor" and "IV.E. Thermistor Check."

1. Check and replace. See "IV.E. Thermistor Check."

. Check and replace. See

"IV.B. Control Board Check."

1. Check and replace.

"V.J. Adjustment of Water Regulating Valve ."

1. Check and replace.

4. Abnormal Ice

Problem Possible Cause Remedy

[1] Small cubes. a) Pump-Out Check Valve 1. Dirty or worn and

leaking by.

b) Ice Cube Guide 1. Out of position.

Circulated water falls into bin.

c) Water System 1. Water supply line

too small; requires 1/" OD line dedicated per machine.

Water lter clogged or

.

ow rate too small.

d) Inlet Water Valve 1. Dirty mesh lter or

orice.

e) Pump Motor 1. RPM too slow. 1. See chart 1.[5].

f) Control Board 1. Defective. 1. See "IV.B. Control Board

1. Clean or replace.

1. Place in position.

1. Increase water line size.

. Replace lter or install a

higher ow rate lter.

1. Clean.

Check."

Problem Possible Cause Remedy

Cloudy or irregular

[]

cubes.

a) Evaporator 1. Frozen up. 1. See chart .

. Scaled up. . Clean

3. Damaged. 3. Replace.

b) Water System 1. Water supply line

too small; requires 1/" OD line dedicated per machine.

Water lter clogged or

.

ow rate too small.

3. High hardness or contains impurities.

c) Spray Guide 1. Dirty. 1. Clean.

1. Increase water line size.

. Replace lter or install a

higher ow rate lter.

3. Install a water softener or lter.

5. Other

Problem Possible Cause Remedy

[1] Icemaker will not stop

when bin is lled with ice.

Abnormal noise. a) Pump Motor 1. Bearings worn out. 1. Replace.

[]

[3] Ice in storage bin

often melts.

a) Thermostatic Bin

Control

b) Fan Motor (except

water-cooled model)

c) Compressor 1. Bearings worn out or

d) Refrigerant Lines 1. Rub or touch other

a) Drain Line(s) 1. Plugged. 1. Clean.

b) Icemaker and Bin 1. Drains not run

c) Ice Cube Guide 1. Out of position.

1. Set too cold. 1. See "IV.C. Bin Control Check."

Defective. . Replace.

.

1. Bearings worn out. 1. Replace.

. Fan blade deformed. . Replace.

3. Fan blade does not

move freely.

cylinder valve broken.

. Mounting pad out of

position.

lines or surfaces.

separately.

Circulated water falls into bin.

3. Replace.

1. Replace.

. Reinstall.

1. Reposition.

1. Separate the drain lines.

1. Place in position.

V. Removal and Replacement of Components

WARNING

1. This unit should be diagnosed and repaired only by qualied service personnel to reduce the risk of death, electric shock, serious injury, or re.

. 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-certied 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 ow.

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 (11°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.

2. Brazing

WARNING

1. R-404A itself is not ammable at atmospheric pressure and temperatures up to 176°F (80°C).

. R-404A itself is not explosive or poisonous. However, when exposed to

high temperatures (open ames), R-404A can be decomposed to form hydrouoric acid and carbonyl uoride both of which are hazardous.

3. Do not use silver alloy or copper alloy containing arsenic.

4. Use an electronic leak detector or soap bubbles to check for leaks. Add a trace of refrigerant to the system (if using an electronic leak detector), and then raise the pressure using nitrogen gas (140 PSIG). DO NOT use R-404A as a mixture with pressurized air for leak testing.

1) Braze all ttings while purging with nitrogen gas owing at a pressure of 3 to 4 PSIG. 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 ow.

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 (11°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 ow backwards.

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 ow.

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 (11°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.

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.

1) Braze all ttings while purging with nitrogen gas owing 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 ow.

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 (11°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 ttings while purging with nitrogen gas owing at a pressure of 3 to 4 PSIG.

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.

1) 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 ow.

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 (11°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 ttings while purging with nitrogen gas owing 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. 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.

1) 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 ow.

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 (11°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 ttings while purging with nitrogen gas owing 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.

1) 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.

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 ow.

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 (11°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 ttings while purging with nitrogen gas owing at a pressure of 3 to 4 PSIG.

11) Evacuate the system, and charge it with refrigerant. See the nameplate for the required refrigerant charge.

1) Replace the panels in their correct positions.

13) Turn on the power supply.

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 ow.

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 (11°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 ttings while purging with nitrogen gas owing at a pressure of 3 to 4 PSIG.

1) 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.

7

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 ow.

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 (11°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 ttings while purging with nitrogen gas owing 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.

1) 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.

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 ow.

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 (11°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.

7) Recover the refrigerant and store it in an approved container.

8) Disconnect the capillary tube at the condenser outlet.

9) Disconnect the are-connections of the valve.

10) Remove the screws and the valve from the bracket.

11) Install the new valve.

1) Remove the drier, then place the new drier in position.

13) Braze all ttings while purging with nitrogen gas owing at a pressure of 3 to 4 PSIG.

14) Use an electronic leak detector or soap bubbles to check for leaks. Add a trace of refrigerant to the system (if using an electronic leak detector), and then raise the pressure using nitrogen gas (140 PSIG). DO NOT use R-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 are-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.

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.

) Five minutes after a freeze cycle starts,

conrm that the thermometer reads 104°F to 115°F (40°C to 46°C). If it does not, rotate the adjustment screw by using a at blade screwdriver until the temperature is in the proper range. See Fig. . 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.

Top View

Fig. 2

Adjustment Screw

CW – Higher CCW – Lower

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 ow.

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 (11°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. 75

8) Braze all ttings with nitrogen gas owing at a pressure of 3 to 4 PSIG.

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.

1) 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.

) 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.

6) Scrape away the old sealant on the thermistor holder and the suction pipe.

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.

Thermistor Lead Cable Tie

Foam Insulation Thermistor Holder

Fig. 3

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.

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.

1) 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 tting 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 tting nut.

9) Close the icemaker water supply line drain valve. Open the icemaker water supply line shut-off valve.

10) Turn on the power supply.

11) Check for leaks.

1) Replace the front panel in its correct position.

13) Turn on the power supply.

O. Removal and Replacement of Pump Motor

1) Turn off the power supply.

) Remove the front panel and the insulation panel.

3) Drain the water tank by removing the cap located on the front bottom part of the ice dropping hole. See Fig. 4.

4) Replace the cap in its correct position. Be careful not to cross thread the 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.

Front

Cube Guide

Cap

Separator

Inside of Ice Dropping Hole

Fig. 4

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.

1) Replace the insulation panel and the front panel in their correct positions.

13) Turn on the power supply.

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 oat 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.

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 ow 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

1. Cleaning Procedure

1) Dilute 7 . 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 rst removing the thumbscrew, lifting up the panel slightly and pulling it towards you.

5) Remove the cap located on the front bottom part of the ice dropping hole. Drain

Front

Inside of Ice Dropping Hole

the water tank. See Fig. 5.

6) Replace the cap in its correct position. Be careful not to cross thread it.

Cap

Fig. 5

7) In bad or severe water conditions, clean the oat switch assembly as described below. Otherwise, continue to step 8.

a. Disconnect the vent tube and the ush tube from the top of the oat switch, then

remove the oat 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 oat switch assembly, then remove

the oat. Be careful not to bend the retainer rod excessively when removing it.

c. Wipe down the oat switch assembly's housing, shaft, oat, 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 oat switch assembly and replace it and the rubber boot in their

correct positions. Reconnect the vent tube and the ush 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.

1) 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.

18) Replace the front panel in its correct position.

19) Turn on the power supply to ll 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 . 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.

1) Clean the storage bin using a neutral cleaner. Rinse thoroughly after cleaning.

13) Turn on the power supply to start the automatic icemaking process.

8

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 lters remove dirt and dust from the air, and keep the condenser from getting clogged. As the lters get clogged, the icemaker's performance will be reduced. Check the lters at least twice a month. When clogged, use warm water and a neutral cleaner to wash the lters.

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 sufcient 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, rst 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.

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

Cap

Inside of Ice Dropping Hole

Fig. 6

Hoshizaki KM-1301SAH-3, KM-1301SWH-3, KM-1301SRH-3 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Important Safety Information

A. Icemaker

1. KM-1301SAH (air-cooled)

2. KM-1301SAH3 (air-cooled)

3. KM-1301SWH (water-cooled)

4. KM-1301SWH3 (water-cooled)

5. KM-1301SRH (remote air-cooled)

6. KM-1301SRH3 (remote air-cooled)

B. Condenser Unit

1. URC-14F

II. General Information

A. Construction

1. KM-1301SAH, KM-1301SAH3 (air-cooled)

2. KM-1301SWH, KM-1301SWH3 (water-cooled)

3. KM-1301SRH, KM-1301SRH3 (remote air-cooled)

B. Sequence of Operation

1. Sequence Cycles and Shutdown

a) 1-Minute Fill Cycle

b) Initial Harvest Cycle

c) Freeze Cycle

d) Pump-Out Cycle

e) Harvest Cycle

f) Shutdown

2. Sequence Flow Chart

C. Control Board

1. Control Board Layout

2. Features

a) Maximum Water Supply Period - 6 minutes

b) Harvest Backup Timer and Freeze Timer

c) High Temperature Safety

d) Low Water Safety

e) High Voltage and Low Voltage Cut-outs

f) LED Lights and Audible Alarm Safeties

3. Controls and Adjustments

a) Default Dip Switch Settings

b) Harvest Timer (S4 dip switch 1 & 2)

c) Pump-Out Timer (S4 dip switch 3 & 4)

d) Pump-Out Frequency Control (S4 dip switch 5 & 6)

e) Harvest Pump Timer (S4 dip switch 7)

f) Factory Use (S4 dip switch 8)

g) Freeze Timer (S4 dip switch 9 & 10)

h) Float Switch Control (S5 dip switch 1)

i) Refill Counter (S5 dip switch 2 through 5)

D. Bin Control

E. Float Switch

F. Thermistor

G. Control Switch

III. Technical Information

A. Water Circuit and Refrigeration Circuit

1. KM-1301SAH, KM-1301SAH3 (air-cooled)

2. KM-1301SWH, KM-1301SWH3 (water-cooled)

3. KM-1301SRH, KM-1301SRH3 (remote air-cooled)

B. Wiring Diagrams

1. Auxiliary Code T-0, U-0

a) KM-1301SAH (air-cooled)

b) KM-1301SWH (water-cooled)

c) KM-1301SRH (remote air-cooled)

d) KM-1301SAH3 (air-cooled) and KM-1301SWH3 (water-cooled)

e) KM-1301SRH3 (remote air-cooled)

2. Auxiliary Code U-1 and Later

a) KM-1301SAH (air-cooled)

b) KM-1301SWH (water-cooled)

c) KM-1301SRH (remote air-cooled)

d) KM-1301SAH3 (air-cooled) and KM-1301SWH3 (water-cooled)

e) KM-1301SRH3 (remote air-cooled)

C. Performance Data

1. KM-1301SAH (air-cooled)

2. KM-1301SAH3 (air-cooled)

3. KM-1301SWH (water-cooled)

4. KM-1301SWH3 (water-cooled)

5. KM-1301SRH (remote air-cooled)

6. KM-1301SRH3 (remote air-cooled)

IV. Service Diagnosis

A. Diagnostic Procedure

B. Control Board Check

C. Bin Control Check