Hoshizaki KM-1601SAH-3 User Manual

Download

Page 1

Hoshizaki America, Inc.

Hoshizaki

Stackable Crescent Cuber

Models KM-1601SAH/3

“A Superior Degree

of Reliability”

www.hoshizaki.com

KM-1601SWH/3 KM-1601SRH/3

SERVICE MANUAL

™

Number: 73145 Issued: 10-31-2006 Revised: 6-24-2011

Page 2

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 30269

Attn: Hoshizaki Technical Support Department

Phone: 1-800-233-1940 Technical Support (770) 487-2331 Fax: 1-800-843-1056 (770) 487-3360 E-mail: techsupport@hoshizaki.com

Web Site: www.hoshizaki.com

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

  •ModelNumber

  •SerialNumber

  •Completeanddetailedexplanationoftheproblem.

Page 3

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 ................................................................................................. 5

I. Specications ...................................................................................................................... 6

A. Icemaker ....................................................................................................................... 6

B. Condenser Unit ........................................................................................................... 16

II. General Information ......................................................................................................... 18

A. Construction ................................................................................................................ 18

B. Sequence of Operation ............................................................................................... 21

1. Sequence Cycles and Shutdown .......................................................................... 21

a) KM-1601SAH/3 "G" Control Board ................................................................... 21

b) KM-1601SWH/3 and KM-1601SRH/3 "E" Control Board .................................. 23

2. Sequence Flow Chart ........................................................................................... 25

a) KM-1601SAH/3 "G" Control Board ................................................................... 25

b) KM-1601SWH/3 and KM-1601SRH/3 "E" Control Board .................................. 26

C. Control Board .............................................................................................................. 27

1. Control Board Layout ............................................................................................. 28

a) KM-1601SAH/3 "G" Control Board ................................................................... 28

b) KM-1601SWH/3 and KM-1601SRH/3 "E" Control Board .................................. 29

2. LED Lights and Audible Alarm Safeties ................................................................. 30

a) KM-1601SAH/3 "G" Control Board ................................................................... 30

b) KM-1601SWH/3 and KM-1601SRH/3 "E" Control Board .................................. 31

3. Controls and Adjustments ...................................................................................... 32

a) Default Dip Switch Settings .............................................................................. 32

b) Harvest Timer (S4 dip switch 1 & 2) ................................................................. 33

c) Pump-Out Timer (S4 dip switch 3 & 4) ............................................................. 33

d) Pump-Out Frequency Control (S4 dip switch 5 & 6)......................................... 34

e) Harvest Pump Timer/Bin Control Selector (S4 dip switch 7) ............................ 34

f) Factory Use (S4 dip switch 8) ........................................................................... 35

g) Freeze Timer (S4 dip switch 9 & 10) ................................................................ 35

h) Float Switch Selector (S5 dip switch 1), KM-1601SAH/3 "G" Control Board .... 35

i) Rell Counter (S5 dip switch 2 through 5), KM-1601SAH/3 "G" Control Board . 35

D. Control Switch ............................................................................................................. 36

III. Technical Information ...................................................................................................... 37

A. Water Circuit and Refrigeration Circuit ........................................................................ 37

1. KM-1601SAH/3 (air-cooled).................................................................................... 37

2. KM-1601SWH/3 (water-cooled) ............................................................................. 38

3. KM-1601SRH/3 (remote air-cooled) ....................................................................... 39

Page 4

B. Wiring Diagrams .......................................................................................................... 40

1. KM-1601SAH (air-cooled)....................................................................................... 40

2. KM-1601SAH3 (air-cooled) .................................................................................... 41

3. KM-1601SWH (water-cooled), KM-1601SRH (remote air-cooled) ......................... 42

4. KM-1601SWH3 (water-cooled), KM-1601SRH3 (remote air-cooled) ..................... 43

C. Performance Data ....................................................................................................... 44

IV. Service Diagnosis ........................................................................................................... 54

A. Diagnostic Procedure ................................................................................................. 54

B. Control Board Check ................................................................................................... 58

C. Bin Control Check ....................................................................................................... 59

D. Float Switch Check and Cleaning ............................................................................... 60

1. Float Switch Check ................................................................................................ 60

2. Float Switch Cleaning ............................................................................................ 61

E. Thermistor Check ........................................................................................................ 62

F. Adjustment of Water Regulating Valve (water-cooled model) ...................................... 62

G. Diagnostic Charts ....................................................................................................... 63

1. No Ice Production ................................................................................................... 63

2. Freeze Up .............................................................................................................. 65

3. Low Ice Production ................................................................................................ 66

V. Replacement of Components .......................................................................................... 68

A. Service for Refrigerant Lines ....................................................................................... 68

1. Refrigerant Recovery ............................................................................................. 68

2. Brazing .................................................................................................................. 69

3. Evacuation and Recharge (R-404A) ...................................................................... 69

B. Important Notes for Component Replacement ............................................................ 71

VI. Cleaning and Maintenance ............................................................................................. 72

A. Cleaning and Sanitizing Instructions ........................................................................... 72

1. Cleaning Procedure ................................................................................................ 73

2. Sanitizing Procedure - Following Cleaning Procedure ............................................74

B. Maintenance ................................................................................................................ 75

C. Preparing the Icemaker for Long Storage ................................................................... 75

Page 5

Important Safety Information

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

WARNING Indicates a hazardous situation which could result in death or

serious injury.

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

IMPORTANT Indicates important information about the use and care of the

unit.

WARNING

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

To reduce the risk of death, electric shock, serious injury, or re, follow basic precautions including the following:

•Onlyqualiedservicetechniciansshouldinstall,service,andmaintainthe

icemaker.

•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.

•THE ICEMAKER MUST BE GROUNDED. Failure to properly ground the icemaker could result in death or serious injury.

•Movethecontrolswitchtothe"OFF"positionandturnoffthepowersupply

before servicing. Lockout/Tagout to prevent the power supply from being turned back on inadvertently.

•Donotmakeanyalterationstotheunit.Alterationscouldresultinelectric

shock, injury, re, or damage to the unit.

Additional Warning for Remote Air-Cooled Model

•THE REMOTE CONDENSER UNIT MUST BE GROUNDED. The power supply and ground wire to the remote condenser unit are supplied from the icemaker. Failure to properly ground the remote condenser unit could result in death or serious injury.

•Movetheicemakercontrolswitchtothe"OFF"positionandturnoffthepower

supply to the icemaker before servicing the remote condenser unit. Lockout/Tagout to prevent the power supply from being turned back on inadvertently.

Page 6

I. Specications

A. Icemaker

1. KM-1601SAH (air-cooled)

AC SUPPLY VOLTAGE 208-230/60/1 (3 wire with neutral for 115V) AMPERAGE 15.0 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 *1462 (663) 1427 (647) 1307 (593) Reference without *marks 80 1435 (651) 1381 (627) 1221 (554)

90 1427 (647) *1343 (609) 1198 (543)

100 1379 (625) 1309 (594) 1064 (483) SHAPE OF ICE Crescent Cube ICE PRODUCTION PER CYCLE 31.4 lbs. (14.3 kg) 1440pcs. APPROXIMATE STORAGE CAPACITY N/A ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 2630(4.70) 2450(4.03) WATER gal./24HR (gal./100 lbs.) 228(17.0) 709(48.5) CEC/CEE TIER LEVEL 2 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 CS18K6E-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. 12.5 oz. (1715g) 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.

Page 7

2. KM-1601SAH3 (air-cooled)

AC SUPPLY VOLTAGE 208-230/60/3 AMPERAGE 12.0 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 *1456 (660) 1423 (646) 1313 (596) Reference without *marks 80 1431 (649) 1381 (626) 1234 (560)

90 1423 (646) *1345 (610) 1211 (549)

100 1379 (626) 1314 (596) 1088 (494) SHAPE OF ICE Crescent Cube ICE PRODUCTION PER CYCLE 32.5 lbs. (14.8 kg) 1440pcs. APPROXIMATE STORAGE CAPACITY N/A ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 2610(4.65) 2370(3.91) WATER gal./24HR (gal./100 lbs.) 249(18.5) 708(48.6) 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 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 CS18K6E-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. 12.5 oz. (1715g) 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.

Page 8

3. KM-1601SWH (water-cooled)

AC SUPPLY VOLTAGE 208-230/60/1 (3 wire with neutral for 115V) AMPERAGE 13.4 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 *1492 (677) 1501 (681) 1419 (643) Reference without *marks 80 1499 (680) 1513 (686) 1378 (625)

90 1501 (681) *1523 (691) 1408 (639)

100 1453 (659) 1496 (679) 1303 (591) SHAPE OF ICE Crescent Cube ICE PRODUCTION PER CYCLE 30.2 lbs. (13.7 kg) 1440 pcs. APPROXIMATE STORAGE CAPACITY N/A ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 2410(3.8) 2300(3.7) WATER gal./24HR (gal./100 lbs.) 373(24.5) 698(46.8) WATER COOLED CONDENSER 1493(98) 930(62)

gal./24HR (gal./100 lbs.) 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 310 lbs. ( 141 kg ), Shipping 360 lbs. ( 163 kg ) CONNECTIONS - ELECTRIC Permanent - Connection

- WATER SUPPLY Inlet 1/2" FPT Condenser Inlet 1/2" FPT

- DRAIN Outlet 3/4" FPT Condenser Outlet 3/8" FPT

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 Regulating Valve BIN CONTROL SYSTEM Thermostat COMPRESSOR Hermetic, Model CS18K6E-PFV-237 CONDENSER Water-cooled, Tube in tube type EVAPORATOR Vertical type, Stainless Steel and Copper REFRIGERANT CONTROL Thermostatic Expansion Valve REFRIGERANT CHARGE R-404A, 3 lbs. 1 oz. ( 1400g ) 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.

Page 9

4. KM-1601SWH3 (water-cooled)

AC SUPPLY VOLTAGE 208-230/60/3 AMPERAGE 9.0 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 *1555 (705) 1558 (707) 1466 (665) Reference without *marks 80 1557 (706) 1562 (708) 1417 (643)

90 1558 (707) *1565 (710) 1440 (653)

100 1507 (684) 1536 (697) 1326 (601) SHAPE OF ICE Crescent Cube ICE PRODUCTION PER CYCLE 30.2 lbs. (13.7 kg) 1440 pcs. APPROXIMATE STORAGE CAPACITY N/A ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 2390(3.66) 2270(3.5) WATER gal./24HR (gal./100 lbs.) 372(23.8) 804(51.7) WATER COOLED CONDENSER 1565(100) 910(59)

gal./24HR (gal./100 lbs.) CEC/CEE TIER LEVEL 2 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 310 lbs. ( 141 kg ), Shipping 360 lbs. ( 163 kg ) CONNECTIONS - ELECTRIC Permanent - Connection

- WATER SUPPLY Inlet 1/2" FPT Condenser Inlet 1/2" FPT

- DRAIN Outlet 3/4" FPT Condenser Outlet 3/8" FPT

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 Regulating Valve BIN CONTROL SYSTEM Thermostat COMPRESSOR Hermetic, Model CS18K6E-TF5-237 CONDENSER Water-cooled, Tube in tube type EVAPORATOR Vertical type, Stainless Steel and Copper REFRIGERANT CONTROL Thermostatic Expansion Valve REFRIGERANT CHARGE R-404A, 3 lbs. 1 oz. ( 1400g ) 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.

Page 10

5. KM-1601SRH with URC-21F (remote air-cooled) (auxiliary codes: R-0; R-1; some S-1)

This data applies to units with an 8 l/min water valve. The 8 l/min water valve is part number 3U0111-02 and has J248-032 stamped on the side of the valve facing the rear of the unit.

AC SUPPLY VOLTAGE 208-230/60/1 (3 wire with neutral for 115V) AMPERAGE 12.8 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 *1583 (718) 1550 (703) 1435 (651) Reference without *marks 80 1558 (707) 1507 (684) 1353 (614)

90 1550 (703) *1472 (668) 1332 (604)

100 1503 (682) 1439 (653) 1203 (546) SHAPE OF ICE Crescent Cube ICE PRODUCTION PER CYCLE 29.4 lbs. (13.3 kg) 1440 pcs. APPROXIMATE STORAGE CAPACITY N/A ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 2640(4.3) 2440(3.7) WATER gal./24HR (gal./100 lbs.) 255(17.3) 503(31.8) 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 350 lbs. (159 kg) CONNECTIONS - ELECTRIC Permanent - Connection

- WATER SUPPLY Inlet 1/2" FPT

- DRAIN Outlet 3/4" FPT

Condensing Pressure Regulator on URC-21F

REFRIGERANT CHARGE R404A, 24 lb. 14.6 oz. (11300g)

(Icemaker 15 lb. 3.4 oz. Cond. Unit 9 lb. 11.2 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 Dispenser or 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.

Page 11

6. KM-1601SRH with URC-21F (remote air-cooled) (auxiliary codes: some S-1; S-2 and later)

This data applies to units with a 15 l/min or 11 l/min water valve. The 15 l/min water valve is part number 3U0111-01 and has J248-030 stamped on the side of the valve facing the rear of the unit. The 11 l/min water valve is either part number 4A1176-04 or 4A5251-04 and has the part number stamped on the side of the valve facing the front of the unit.

AC SUPPLY VOLTAGE 208-230/60/1 (3 wire with neutral for 115V) AMPERAGE 12.8 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 *1564 (709) 1547 (702) 1468 (666) Reference without *marks 80 1551 (703) 1524 (691) 1415 (642)

90 1547 (702) *1505 (683) 1407 (638)

100 1512 (686) 1482 (672) 1317 (597) SHAPE OF ICE Crescent Cube ICE PRODUCTION PER CYCLE 31.2 lbs. (14.2 kg) 1440 pcs. APPROXIMATE STORAGE CAPACITY N/A ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 2700(4.30) 2610(4.00) WATER gal./24HR (gal./100 lbs.) 375(24.9) 785(50.2) CEC/CEE TIER LEVEL 2 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 350 lbs. (159 kg) CONNECTIONS - ELECTRIC Permanent - Connection

- WATER SUPPLY Inlet 1/2" FPT

- DRAIN Outlet 3/4" FPT

Condensing Pressure Regulator on URC-21F

REFRIGERANT CHARGE R404A, 24 lb. 14.6 oz. (11300g)

-REQUIRED Ice Dispenser or 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.

Page 12

7. KM-1601SRH with URC-22F (remote air-cooled) (auxiliary codes: S-2 and later)

This data applies to units with an 11 l/min water valve. The 11 l/min water valve is either part number 4A1176-04 or 4A5251-04 and has the part number stamped on the side of the valve facing the front of the unit.

AC SUPPLY VOLTAGE 208-230/60/1 (3 wire with neutral for 115V) AMPERAGE 12.8 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 *1531 (694) 1519 (689) 1426 (647) Reference without *marks 80 1522 (690) 1503 (682) 1368 (620)

90 1519 (689) *1490 (676) 1371 (622)

100 1475 (669) 1462 (663) 1261 (572) SHAPE OF ICE Crescent Cube ICE PRODUCTION PER CYCLE 31.6 lbs. (14.3 kg) 1440 pcs. APPROXIMATE STORAGE CAPACITY N/A ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 2710(4.36) 2560(4.01) WATER gal./24HR (gal./100 lbs.) 352(23.6) 755(49.3) CEC/CEE TIER LEVEL 2 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 350 lbs. (159 kg) CONNECTIONS - ELECTRIC Permanent - Connection

- WATER SUPPLY Inlet 1/2" FPT

- DRAIN Outlet 3/4" FPT

Condensing Pressure Regulator on URC-22F

REFRIGERANT CHARGE R404A, 22 lb. 14.8 oz. (10400g)

(Icemaker 15 lb. 3.4 oz. Cond. Unit 7 lb. 11.5 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 Dispenser or 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.

Page 13

8. KM-1601SRH3 with URC-21F (remote air-cooled) (auxiliary codes: R-0; R-1; some S-1)

This data applies to units with an 8 l/min water valve. The 8 l/min water valve is part number 3U0111-02 and has J248-032 stamped on the side of the valve facing the rear of the unit.

AC SUPPLY VOLTAGE 208-230/60/3 AMPERAGE 7.9 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 *1596 (724) 1556 (706) 1436 (651) Reference without *marks 80 1565 (710) 1503 (682) 1347 (611)

90 1556 (706) *1459 (662) 1316 (597)

100 1510 (685) 1426 (647) 1184 (537) SHAPE OF ICE Crescent Cube ICE PRODUCTION PER CYCLE 29.4 lbs. (13.3 kg) 1440 pcs. APPROXIMATE STORAGE CAPACITY N/A ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 2580(4.3) 2450(3.7) WATER gal./24HR (gal./100 lbs.) 261(17.9) 504(31.6) 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 350 lbs. (159 kg) CONNECTIONS - ELECTRIC Permanent - Connection

- WATER SUPPLY Inlet 1/2" FPT

- DRAIN Outlet 3/4" FPT

Condensing Pressure Regulator on URC-21F

REFRIGERANT CHARGE R404A, 24 lb. 14.6 oz. (11300g)

-REQUIRED Ice Dispenser or 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.

Page 14

9. KM-1601SRH3 with URC-21F (remote air-cooled) (auxiliary codes: some S-1; S-2 and later)

AC SUPPLY VOLTAGE 208-230/60/3 AMPERAGE 7.9 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 *1585 (719) 1563 (709) 1464 (664) Reference without *marks 80 1568 (711) 1535 (696) 1396 (633)

90 1563 (709) *1511 (685) 1387 (629)

100 1520 (689) 1482 (672) 1273 (577) SHAPE OF ICE Crescent Cube ICE PRODUCTION PER CYCLE 31.2 lbs. (14.2 kg) 1440 pcs. APPROXIMATE STORAGE CAPACITY N/A ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 2960(4.70) 2580(3.90) WATER gal./24HR (gal./100 lbs.) 363(24.0) 781(49.3) CEC/CEE TIER LEVEL 1 ENERGY STAR NO 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 350 lbs. (159 kg) CONNECTIONS - ELECTRIC Permanent - Connection

- WATER SUPPLY Inlet 1/2" FPT

- DRAIN Outlet 3/4" FPT

Condensing Pressure Regulator on URC-21F

REFRIGERANT CHARGE R404A, 24 lb. 14.6 oz. (11300g)

-REQUIRED Ice Dispenser or 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.

Page 15

10. KM-1601SRH3 with URC-22F (remote air-cooled) (auxiliary codes: S-2 and later)

AC SUPPLY VOLTAGE 208-230/60/3 AMPERAGE 7.9 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 *1530 (694) 1521 (690) 1414 (641) Reference without *marks 80 1523 (691) 1508 (684) 1349 (612)

90 1521 (690) *1498 (679) 1359 (616)

100 1468 (666) 1465 (665) 1231 (558) SHAPE OF ICE Crescent Cube ICE PRODUCTION PER CYCLE 32.1 lbs. (14.6 kg) 1440 pcs. APPROXIMATE STORAGE CAPACITY N/A ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 2780(4.46) 2490(3.90) WATER gal./24HR (gal./100 lbs.) 348(23.2) 704(46.0) CEC/CEE TIER LEVEL 2 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 350 lbs. (159 kg) CONNECTIONS - ELECTRIC Permanent - Connection

- WATER SUPPLY Inlet 1/2" FPT

- DRAIN Outlet 3/4" FPT

Condensing Pressure Regulator on URC-22F

REFRIGERANT CHARGE R404A, 22 lb. 14.8 oz. (10400g)

-REQUIRED Ice Dispenser or 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.

Page 16

B. Condenser Unit

1. URC-21F

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

FAN MOTOR 115 V Total 2.6FLA 130W

EXTERIOR DIMENSIONS (WxDxH) 46-3/8" x 15-11/16" x 25-15/16" (1178 x 398 x 659 mm)

DIMENSIONS INCLUDING LEGS (WxDxH) 48-7/16" x 18-1/8" x 40-7/8" (1230 x 460 x 1039 mm)

EXTERIOR FINISH Galvanized Steel

WEIGHT Net 158 lbs. ( 72 kg ) Shipping 169 lbs. ( 77 kg )

CONNECTIONS - ELECTRIC Permanent - Connection

- REFRIGERANT Discharge Line 1-1/16"-12 UNF Fitting (#10 PARKER)

Liquid Line 5/8"-18 UNF Fitting (#6 PARKER)

CONDENSER Air-cooled, Fin and tube type

FAN MOTOR PROTECTION Thermal Protection

REFRIGERANT CONTROL Condensing Pressure Regulator

REFRIGERANT CHARGE R-404A 9 lb. 11oz. (4400g)

DESIGN PRESSURE High 467 PSIG 32.2 Bar

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

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

notice.

Page 17

2. URC-22F

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

FAN MOTOR 115 V Total 2.6FLA 130W

EXTERIOR DIMENSIONS (WxDxH) 46-3/8" x 15-11/16" x 25-15/16" (1178 x 398 x 659 mm)

DIMENSIONS INCLUDING LEGS (WxDxH) 48-7/16" x 18-1/8" x 40-7/8" (1230 x 460 x 1039 mm)

EXTERIOR FINISH Galvanized Steel

WEIGHT Net 134 lbs. (61 kg ) Shipping 145 lbs. ( 66 kg )

CONNECTIONS - ELECTRIC Permanent - Connection

- REFRIGERANT Discharge Line 1-1/16"-12 UNF Fitting (#10 PARKER)

Liquid Line 5/8"-18 UNF Fitting (#6 PARKER)

CONDENSER Air-cooled, Fin and tube type

FAN MOTOR PROTECTION Thermal Protection

REFRIGERANT CONTROL Condensing Pressure Regulator

REFRIGERANT CHARGE R-404A 7 lb. 11.5 oz. (3500g)

DESIGN PRESSURE High 467 PSIG 32.2 Bar

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

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

notice.

Page 18

II. General Information

A. Construction

1. KM-1601SAH/3 (air-cooled)

Separators

Evaporator Assembly

Cube Guides

Pump-Out Check Valve

Water Pump (PM)

Float Switch (F/S)

Inlet Water Valve (WV)

Cleaning Valve

Compressor (Comp)

Extension Bracket

Spray Tubes

Control Switch

Bin Control Thermostat (TBC)

Low-Side Service Valve

High-Side Service Valve

Thermostatic Expansion Valves (TXV)

Water Supply Inlet

Junction Box

Hot Gas Valve (HGV)

Check Valves

Air-Cooled Condenser

Control Box

Fan Blade

Fan Motor (FM)

Drier

Liquid Line Valve (LLV)

Transformer Box KM-1601SAH3

Page 19

2. KM-1601SWH/3 (water-cooled)

Spray Tubes

Inlet Water Valve (WV)

Evaporator Assembly

Cube Guides

Pump-Out Check Valve

Water Pump (PM)

Float Switch (F/S)

Separators

Low-Side Service Valve

High-Side Service Valve

Thermostatic Expansion Valves (TXV)

Water Supply Inlet

Junction Box

Hot Gas Valve (HGV)

Check Valves

Water Regulating Valve (WRV)

Water-Cooled Condenser

Cleaning Valve

Compressor (Comp)

Extension Bracket

Bin Control Thermostat (TBC)

Control Switch

Capacitor Box (KM-1601SWH)

Transformer Box (KM-1601SWH3)

Control Box

Drier

Liquid Line Valve (LLV)

Page 20

3. KM-1601SRH/3 (remote air-cooled)

Spray Tubes

Evaporator Assembly

Cleaning Valve

Pump-Out Check Valve

Water Pump (PM)

Float Switch (F/S)

Compressor (Comp)

Inlet Water Valve (WV)

Low-Side Service Valve

Separators

High-Side Liquid Service Valve

High-Side Vapor Service Valve

Water Supply Inlet

Hot Gas Valve (HGV)

Junction Boxes

Thermostatic Expansion Valves (TXV)

Check Valves

Receiver

Control Box

Extension Bracket

Control Switch

Bin Control Thermostat (TBC)

Drier

Liquid Line Valve (LLV)

Capacitor Box (KM-1601SRH)

Transformer Box (KM-1601SRH3)

Page 21

B. Sequence of Operation

1. Sequence Cycles and Shutdown

a) KM-1601SAH/3 "G" Control Board

IMPORTANT

KM-1601SAH/3 utilize a "G" control board and TBC. For KM-1601SAH/3 operation, the K4 jumper (4A4883G01) must be in place on the control board RED K4 connector or the unit will not operate.

The steps in the sequence are as outlined below. When power is supplied, CB red "POWER OK" LED and green "BC CLOSED" LED turn on. If red "POWER OK" LED is off, clear ice away from TBC bulb in the storage bin area. If yellow "BC OPEN" LED is on, the unit will not start. In this case check that CB has the K4 jumper in place on CB RED K4 connector. 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, 2.

(1) 1-Minute Fill Cycle

LED 4 is on. WV and X11 relay 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 open, WV remains energized through additional 1-minute ll cycles until water lls the water tank and closes F/S. This serves as a low water safety to protect PM.

(2) Initial Harvest Cycle

LEDs 1, 4, and 2 are on. WV and X11 relay remain energized, Comp, FM, HGV, and X10 relay 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 & 2). The harvest timer has settings of 60, 90, 120, and 180 seconds. For details, see "II.C.3.b) Harvest Timer (S4 dip switch 1 & 2)." 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. LED4 turns off when

WV and X11 relay de-energize. LED 3 turns 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 CB K1 ten-pin connector pin #5 (DBU wire) and the X10 relay. When the harvest timer terminates, 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 2 minutes.

(3) Freeze Cycle

LED 1 is on. Comp and FM remain energized, PM energizes or remains energized depending on harvest pump timer (S4 dip switch 7) setting. LLV energizes. HGV and X10 relay 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 during the rst 5 minutes of freeze). After the 5-minute short cycle protection timer terminates, CB turns freeze termination over to F/S. As ice builds on the evaporator, the water level in the water tank lowers. The freeze cycle

Page 22

continues until F/S opens and terminates the cycle. There is a 15 second delay before CB acknowledges an open F/S.

(4) Pump-Out Cycle

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. For details, see "II.C.3.c) Pump-Out Timer (S4 dip switch 3 & 4)." CAUTION! Do not

adjust S4 dip switch 3 & 4 to 3 off and 4 on. Adjustment to this position on this model prevents the pump motor from rotating in the pump-out direction. Comp and

FM remain energized, HGV energizes, WV energizes if S4 dip switch 3 off and 4 on. LLV de-energizes. PM stops for 2 seconds then reverses, taking water from the bottom of the water tank and forcing pressure against the pump-out check valve seat allowing water to go through the pump-out 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 terminates, pumpout 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 2, 5, or 10 cycles. 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 2nd freeze cycle

ON OFF Every 2 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

(5) Harvest Cycle

Same as the initial harvest cycle. See "II.B.1.a)(2) Initial Harvest Cycle."

Note: Unit continues to cycle until TBC is satised or power is turned off. The unit always

restarts at the 1-minute ll cycle.

(6) Shutdown

When ice contacts TBC bulb (TBC open), TBC shuts down the unit within 10 seconds. TBC is factory set, and generally no adjustment is required. However, adjustment may be needed in some conditions, particularly at higher altitude locations.

Legend: CB–control board; Comp–compressor; FM–fan motor; F/S–oat switch; HGV–hot

gas valve; LLV –liquid line valve; PM–pump motor; TBC–thermostatic bin control; WV–inlet water valve

Page 23

b) KM-1601SWH/3 and KM-1601SRH/3 "E" Control Board

IMPORTANT

KM-1601SWH/3 and KM-1601SRH/3 utilize an "E" control board and TBC.

The steps in the sequence are as outlined below. When power is supplied, CB red "POWER OK" LED turns on. 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, 2.

(1) 1-Minute Fill Cycle

LED 4 is on. WV energizes 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 open, WV remains energized through additional 1-minute ll cycles until water lls the water tank and closes F/S. This serves as a low water safety to protect PM.

(2) Initial Harvest Cycle

LEDs 1, 4, and 2 are on. WV remains energized, Comp, FMR, HGV 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 & 2). The harvest timer has settings of 60, 90, 120, and 180 seconds. For details, see "II.C.3.b) Harvest Timer (S4 dip switch 1 & 2)." WV is energized during harvest for a maximum of 6 minutes or the length of harvest, whichever is shorter. LED 4 turns off when WV de-energizes. When the harvest timer terminates, 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 2 minutes.

(3) Freeze Cycle

LED 1 is on. Comp and FMR remain energized, PM and LLV energize, HGV and WV 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 during the rst 5 minutes of freeze). After the 5-minute short cycle protection timer terminates, CB turns freeze termination over to F/S. As ice builds on the evaporator, the water level in the water tank lowers. The freeze cycle continues until F/S opens and terminates the cycle.

(4) Pump-Out Cycle

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. 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 de-energizes. PM stops for 2 seconds then reverses, taking water from the bottom of the water tank and forcing pressure against the pump-out check valve seat allowing water to go through the pump-out 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 terminates, the pump-out is complete.

The rst pump-out occurs after the 1st freeze cycle, then every 10th cycle thereafter. The pump-out frequency 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 2, 5, or 10 cycles. For details, see "II.C.3.d) Pump-Out Frequency Control (S4 dip switch 5 & 6)."

Page 24

(5) Harvest Cycle

Same as the initial harvest cycle. See "II.B.1.b)(2) Initial Harvest Cycle."

Note: Unit continues to cycle until TBC is satised or power is turned off. The unit always

restarts at the 1-minute ll cycle.

(6) Shutdown

When ice contacts TBC bulb (TBC switch open), TBC shuts down the unit within 10 seconds. TBC is factory set, and generally no adjustment is required. However, adjustment may be needed in some conditions, particularly at higher altitude locations.

CAUTION! Do not adjust S4 dip switch 7 out of the factory default position on this model. This dip switch must be left in the factory default position or this unit will not operate correctly.

Legend: CB–control board; Comp–compressor; FMR–fan motor-remote; F/S–oat switch;

HGV–hot gas valve; LLV –liquid line valve; PM–pump motor; TBC–thermostatic bin

control; WV–inlet water valve

Page 25

2. Sequence Flow Chart

a) KM-1601SAH/3 "G" Control Board

10th cycle (S4 dip

switch 5 & 6)

2 sec., then reverses

for 10/20 sec. (S4 dip

4. Pump-Out Cycle

3. Freeze Cycle

•Factorysetforevery

•Minimumfreezetime:5min.

(S4 dip switch 9 & 10)

•Maximumfreezetime:freezetimersetting

•Pumpmotorstopsfor

switch 3 & 4)

F/S in control

5-min. timer in

control

Comp continues

F/S open or freeze

F/S closed

timer terminates

Comp continues

FM continues

HGV energized

PM de-energizes for 2 sec.,

PM continues

LLV energized

To 1 above

then reverses for 10/20 sec.

LLV de-energized

NOTE: Green "BC CLOSED" LED on continuously

when the K4 jumper is in place.

No ice touching TBC bulb. Icemaker

starts at "1. 1-Minute Fill Cycle."

3. Ice Level Lowered

TBC closedTBC-open

HGV de-energized

KM-1601SAH/3

"G" Control Board Sequence Flow Chart

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:20min.

2. Harvest Cycle

Cycle

1. 1-Minute Fill

1 to 3-min. timer in control

Thermistor

Harvest Pump

(S4 dip switch 1 & 2)

in control

0 or 50 sec.

Timer

F/S check

PM energized

WV de-energized

F/S closed

F/S check

Thermistor temperature

WV continues

WV energized

reaches 48°F (9°C)

(3.9 kΩ or less).

Comp energized

FM energized

F/S open

HGV energized

Harvest timer starts.

F/S open

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

2. Icemaker Off

1. Bin Full

Shutdown

All components de-energized.

Within 10 sec. after ice contacts TBC

bulb, unit shuts down.

and Restart

TBC Operation

Ice contacts TBC bulb

All components de-energized

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

LLV–liquid line valve

PM–pump motor

TBC–thermostatic bin control

WV–inlet water valve

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.

Cycle Steps

Startup begins

here after 5-sec.

delay

Legend:

Comp–compressor

FM–fan motor

F/S–oat switch

HGV–hot gas valve

Page 26

b) KM-1601SWH/3 and KM-1601SRH/3 "E" Control Board

To 1 above

10th cycle (S4 dip

switch 5 & 6)

2 sec., then reverses

for 10/20 sec. (S4 dip

•Pumpmotorstopsfor

switch 3 & 4)

Comp continues

FMR continues

HGV energized

PM de-energizes for 2 sec.,

then reverses for 10/20 sec.

LLV de-energized

•Factorysetforevery

4. Pump-Out Cycle

3. Freeze Cycle

KM-1601SWH/3 and KM-1601SRH/3

"E" Control Board Sequence Flow Chart

•Minimumfreezetime:5min.

F/S in control

F/S open or freeze

timer terminates

No ice touching TBC bulb. Icemaker

starts at "1. 1-Minute Fill Cycle."

3. Ice Level Lowered

TBC closedTBC-open

(S4 dip switch 9 & 10)

5-min. timer in

1 to 3-min. timer in control

control

(S4 dip switch 1 & 2)

•Maximumfreezetime:freezetimersetting

F/S closed

F/S check

Comp continues

Thermistor temperature

FMR continues

PM energized

reaches 48°F (9°C)

(3.9 kΩ or less).

LLV energized

Harvest timer starts.

HGV de-energized

WV de-energized

F/S open

All components de-energized.

2. Icemaker Off

All components de-energized

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.

•WVtime:6min.orthelengthofharvest,whichever

2. Harvest Cycle

Cycle

1. 1-Minute Fill

Cycle Steps

Thermistor

is shorter.

in control

•Maximumharvesttime:20min.

F/S closed

WV continues

Comp energized

FMR energized

HGV energized

Within 10 sec. after ice contacts TBC

bulb, unit shuts down.

1. Bin Full

WV energized

F/S open

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

Shutdown

LLV–liquid line valve

PM–pump motor

TBC–thermostatic bin control

Legend:

Comp–compressor

FMR–fan motor-remote

WV–inlet water valve

F/S–oat switch

HGV–hot gas valve

Ice contacts TBC bulb

TBC Operation

and Restart

F/S check

Startup begins

here after 5-sec.

delay

Page 27

C. Control Board

•A Hoshizaki exclusive control board is employed in Hoshizaki Stackable Crescent Cubers.

•All models are pretested and factory set.

•For a control board check procedure, see "IV.B. Control Board Check."

CAUTION

1. The control board is fragile; handle very carefully.

2. 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 all three. K3 = Thermistor K4 = Jumper (4A4883G01) on KM-1601SAH/3 "G" control board K4 = Open on KM-1601SWH/3 and KM-1601SRH/3 "E" control board K5 = Float Switch

5. Always replace the whole control board assembly if it goes bad.

6. Do not short out power supply to test for voltage.

Page 28

1. Control Board Layout

a) KM-1601SAH/3 "G" Control Board

"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 10.5VAC is supplied to K2 connector)

• Relay LEDs (green)

(indicate which relays and K1 connector pins are energized)

• LED 2 (X2 Relay)

LED 2 ON: K1 Connector Pin #2 LED 2 OFF: K1 Connector Pin #3

• LED 3 (X3 Relay)

LED 3 on: K1 Connector Pin #5 (energized during harvest pump timer) LED 3 off: K1 Connector Pin #4 (energized in freeze)

• LED 4 (X4 Relay)

K1 Connector Pin #6

• LED 1 (X1 Relay)

K1 Connector Pin #1, #9

• "ALARM RESET" Button

• K2 Connector

Control Transformer (10.5VAC)

• 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) for Thermostatic Bin Control Application

• 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-LED 1 on: Compressor Relay/ Magnetic Contactor and Fan Motor (FM) #2-LED 2 on: Hot Gas Valve (HGV); X10 Relay in Harvest #3-LED 2 off: Liquid Line Valve (LLV) #4-LED 3 off: Pump Motor (PM) in Freeze #5-LED 3 on: Pump Motor (PM) in Harvest Pump Timer and Pump-Out #6-LED 4: Inlet Water Valve (WV) and X11 Relay

# 7, 10 Supply Voltage #8 Open

"G" Control Board

Part Number 2A3792-01

Page 29

b) KM-1601SWH/3 and KM-1601SRH/3 "E" Control Board

"E" Control Board

• Harvest Timer LED

(orange)

• Freeze Timer LED

(yellow)

• Part Number

• Alarm Buzzer

• Power LED (red)

(lights when 10.5VAC is supplied to K2 connector)

• Relay LEDs (green)

(indicate which relays and K1 connector pins are energized)

• LED 2 (X2 Relay)

LED 2 ON: K1 Connector Pin #2 LED 2 OFF: K1 Connector Pin #3

• LED 3 (X3 Relay)

LED 3 on: K1 Connector Pin #5 (energized during harvest pump timer) LED 3 off: K1 Connector Pin #4 (energized in freeze)

• LED 4 (X4 Relay)

K1 Connector Pin #6

• LED 1 (X1 Relay)

K1 Connector Pin #1, #9

• "ALARM RESET" Button

• K2 Connector

Control Transformer (10.5VAC)

• S4 Dip Switch

• "C" "ALP" Switch

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

• "OUTPUT TEST" Button

(used to test relays on control board)

• WHITE K3 Connector

Harvest Control (thermistor)

• RED K4 Connector

Mechanical Bin Control (open on units with thermostatic bin control)

• 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-LED 1 on:

Compressor Relay/

Magnetic Contactor and

Fan Motor-Remote (FMR)

#2-LED 2 on: Hot Gas

Valve (HGV)

#3-LED 2 off: Liquid Line

Valve (LLV)

#4-LED 3 off: Pump Motor

(PM) in Freeze

#5-LED 3 on: Pump Motor

(PM) in Pump-Out

#6-LED 4: Inlet Water Valve

(WV)

# 7, 10 Supply Voltage

#8 Open

"E" Control Board

Part Number 2A1410-01 (factory); 2A1410-02 (service)

Page 30

2. LED Lights and Audible Alarm Safeties

a) KM-1601SAH/3 "G" Control Board

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 remains 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, 2. For details, see "II.B. Sequence of Operation."

Sequence Step LED

1-Minute Fill Cycle 4 WV 1 minute Harvest Cycle 1, 4, 2 Comp, FM, WV,

Harvest Pump Timer 1, 3, 2 Comp, FM, PM,

Freeze Cycle 1 Comp, FM, PM, LLV 5 minutes freeze timer

Pump-Out Cycle 1, 4*, 3, 2 Comp, FM, WV*,

Energized

Components

HGV

PM, HGV

Min. Max. Avg.

2 minutes 20 minutes 3 to 5 minutes

0 seconds 50 seconds harvest pump timer

10 seconds 20 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 > 127°F (53°C))

2 Harvest Backup Timer

(harvest > 20 min. for two cycles in a row)

3 Freeze Timer

(freeze > freeze timer 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

(92Vac±5% or less)

7 High Voltage

(147Vac±5% or more)

Type of Alarm Notes

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

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

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

Legend: Comp–compressor; FM–fan motor; F/S–oat switch; HGV–hot gas valve;

LLV –liquid line valve; PM–pump motor; TXV–thermostatic expansion valve; WV–inlet water valve

Page 31

b) KM-1601SWH/3 and KM-1601SRH/3 "E" Control Board

At startup, a 5-second delay occurs while the control board conducts an internal timer check. A beep occurs when power is turned off. The red LED indicates proper control voltage and remains 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, 2. For details, see "II.B. Sequence of Operation."

Sequence Step LED

1-Minute Fill Cycle 4 WV 1 minute Harvest Cycle 1, 4, 2 Comp, FMR, WV,

Freeze Cycle 1 Comp, FMR, PM,

Pump-Out Cycle 1, 4*, 3, 2 Comp, FMR, WV*,

Energized

Components

HGV

LLV

PM, HGV

Min. Max. Avg.

2 minutes 20 minutes 3 to 5 minutes

5 minutes freeze timer

10 seconds 20 seconds *pump-out timer

Time LEDs are On

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 > 127°F (53°C))

2 Harvest Backup Timer

(harvest > 20 min. for two cycles in a row)

3 Freeze Timer

(freeze > freeze timer 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

(92Vac±5% or less)

7 High Voltage

(147Vac±5% or more)

Type of Alarm Notes

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

Orange "H TIMER" LED on. Check for open thermistor, HGV not opening, TXV or LLV leaking by, low charge, inefficient Comp, or WRV leaking by.

Yellow "F TIMER" LED on. 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 inefficient Comp.

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

Legend: Comp–compressor; FMR–fan motor-remote; F/S–oat switch; HGV–hot gas valve;

HM–headmaster (C.P.R.); L LV –liquid line valve; PM–pump motor; TXV–thermostatic expansion valve; WRV–water regulating valve; WV–inlet water valve

Page 32

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 1-800-233-1940.

a) Default Dip Switch Settings

Note that the settings vary for KM-1601SRH/3 depending on the water valve installed. The dip switches are factory set to the following positions:

S4 Dip Switch

Model

KM-1601SAH/3 "G" Control Board

KM-1601SWH/3 "E" Control Board

KM-1601SRH/3 "E" Control Board

Water Auxiliary Code

Dip switch settings for air-cooled units are as listed, regardless of auxiliary code.

Dip switch settings for water-cooled units are as listed, regardless of auxiliary code.

R-0, R-1, some S-1

Some S-1 3 U0111- 01

S-2 & later 4A1176-04 (11 l/min)

V-1 (M) & later 4A5251-04 (11 l/min)

Valve Part

Number

3U0111-02

(8 l/min)

(15 l/min)

Code on Water Valve

J248-032

J248-030

S4 Dip Switch No.

1 2 3 4 5 6 7 8 9 10

OFF OFF ON ON ON ON ON OFF OFF OFF

OFF OFF OFF OFF ON ON OFF OFF OFF ON

ON OFF ON OFF OFF OFF OFF OFF OFF OFF

ON OFF OFF OFF ON ON OFF OFF OFF OFF

S5 Dip Switch (Do Not Adjust)

S5 Dip Switch No.

Model

KM-1601SAH/3 OFF OFF OFF OFF OFF

KM-1601SWH/3

KM-1601SRH/3

1 2 3 4 5

Not Applicable

S4 Dip Switch

All Models

Freeze Timer (9 & 10)

Factory Use (8) Harvest Pump Timer (7) KM-1601SAH/3 "G" Control Board

Bin Control Selector (7) KM-1601SWH/3 & KM-1601SRH/3 "E" Control Board

Pump-Out Frequency Control (5 & 6)

Pump-Out Timer (3 & 4)

Harvest Timer (1 & 2)

1 2 3 4 5 6 7 8 9 10

S5 Dip Switch

KM-1601SAH/3 "G" Control Board

Rell Counter (2 through 5)

1 2 3 4 5

Float Switch Selector (1)

Page 33

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 1-800-233-1940 for recommendations. Keep in mind that setting the harvest timer to a longer setting decreases 24-hour production. Note that the pump-out timer (S4 dip switch 3 & 4) acts in place of the harvest timer during cycles with a pump-out. For details, see "II.C.3.c) Pump-Out Timer (S4 dip switch 3 & 4)."

S4 Dip Switch Setting Time

No. 1 No. 2

OFF OFF 60

ON OFF 90

OFF ON 120

ON ON 180

(seconds)

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 KM-1601SAH/3. 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 2 seconds later in the reverse direction, taking water from the bottom of the water tank and forcing pressure against the pump-out check valve seat allowing water to go through the pump-out 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. The pump-out timer control can be set to pump-out for 10 or 20 seconds.

S4 Dip Switch Setting Time (seconds)

No. 3 No. 4

OFF OFF 10 150 closed

ON OFF 10 180 closed

OFF ON 10 120 open

ON ON 20 180 closed

Inlet

Water

Valve

T1: Time to drain the water tank T2: Harvest timer at pump-out

Page 34

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 (except for KM-1601SRH/3 utilizing 3U0111-02 water valve), 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 2, 5, or 10 cycles.

Timing of the rst pump-out is dependent on the control board. For KM-1601SAH/3 ("G" control board), rst pump-out is dependent on S4 dip switch 5 & 6. See the table below. For KM-1601SWH/3 and KM-1601SRH/3 ("E" control board), rst pump-out is after the rst freeze cycle.

KM-1601 SAH/3 "G" & KM-1601SWH/3 & KM-1610SRH/3 "E" Control Board

1st Pump-Out

S4 Dip Switch Setting

Pump-Out

Frequency

OFF OFF Every cycle After 2nd freeze cycle After 1st freeze cycle

ON OFF Every 2 cycles After 3rd freeze cycle

OFF ON Every 5 cycles After 6th freeze cycle

ON ON Every 10 cycles After 11th freeze cycle

KM-1601SAH/3

"G" Control Board

KM-1601SWH/3

KM-1601SRH/3

"E" Control BoardNo. 5 No. 6

e) Harvest Pump Timer/Bin Control Selector (S4 dip switch 7)

Depending on the control board, S4 dip switch 7 is either a harvest pump timer or bin control selector.

(1) Harvest Pump Timer, KM-1601SAH/3 "G" Control Board

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 X10 relay. 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."

KM-1601SAH/3

"G" Control Board

S4 Dip Switch Setting

No. 7

ON 50

OFF 0

Pump Motor

Time (seconds)

Page 35

(2) Bin Control Selector, KM-1601SWH/3 & KM-1601SRH/3 "E" Control Board

Factory set for proper operation. Do not adjust. When set to the on position on a unit with a thermostatic bin control, a 5-beep alarm sounds (open circuit) and the unit does not operate.

KM-1601SWH/3 & KM-1601SRH/3

"E" Control Board

S4 Dip Switch Setting

No. 7

ON Mechanical

OFF Thermostatic

Bin Control

f) Factory Use (S4 dip switch 8)

Factory set. 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 2 consecutive freeze timer terminations, the control board shuts down the icemaker. In this case, see "IV.G.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 1-800-233-1940 for recommendations.

S4 Dip Switch Setting

No. 9 No. 10

OFF OFF 60

OFF ON 50

ON OFF 70

ON ON 60

Time

(minutes)

h) Float Switch Selector (S5 dip switch 1), KM-1601SAH/3 "G" Control Board

CAUTION

Factory set. Do not adjust. This must be left in the factory default position or the unit will not operate correctly.

S5 dip switch 1 allows for single or double oat switch applications. The KM-1601SAH/3 use a single oat switch.

i) Rell Counter (S5 dip switch 2 through 5), KM-1601SAH/3 "G" Control Board

CAUTION

Factory set. Do not adjust. These must be left in the factory default position or the unit will not operate correctly.

S5 dip switch 2 through 5 allows for rells during the freeze cycle. The KM-1601SAH/3 do not rell.

Page 36

D. 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.

Page 37

III. Technical Information

A. Water Circuit and Refrigeration Circuit

1. KM-1601SAH/3 (air-cooled)

Check

Valves

Hot Gas

Val ve

High-Pressure

Switch

Drier

Strainer

High-Side

Service

Val ve

Discharge Line

Suction Line

Fan

Condenser

Water Supply

Inlet Water Valve

Spray Tubes

Evaporator

Cleaning Valve

Liquid Line

Thermistor

Val ve

Heat Exchanger

Low-Side

Service

Val ve

Float Switch

Compressor

Drain

Thermostatic Expansion Valves

Water Pump

Pump-Out

Check Valve

Pump-Out

Freeze/Harvest

Pump Timer

Spray Tubes

Water

Tank

Refrigeration Circuit

Water Circuit

Page 38

2. KM-1601SWH/3 (water-cooled)

Check

Valves

Water Regulating Valve

Drain

Condenser

Water Supply

High-Pressure

Switch

Hot Gas

Val ve

Strainer

Drier

High-Side

Service

Val ve

Discharge Line

Suction Line

Compressor

Thermostatic Expansion Valves

Liquid Line

Val ve

Low-Side

Service

Val ve

Heat Exchanger

Thermistor

Cleaning Valve

Pump-Out

Check Valve

Float Switch

Drain

Water Supply

Inlet Water Valve

Spray Tubes

Water Pump

Pump-Out

Evaporator

Freeze/Harvest

Pump Timer

Water

Tank

Refrigeration Circuit

Water Circuit

Spray Tubes

Page 39

3. KM-1601SRH/3 (remote air-cooled)

Hot Gas

High-Side Liquid

Service Valve

Access Valve

Fusible Plug

High-Pressure

Switch

Check

Valves

Val ve

Strainer

Condenser

Water

Supply

Inlet Water Valve

High-Side

Vapor

Service

Val ve

Discharge Line

Suction Line

Receiver

Drier

Headmaster

(C.P.R.)

Liquid Line

Val ve

Fan

Heat Exchanger

Low-Side

Service

Val ve

Compressor

Thermostatic Expansion Valves

Thermistor

Cleaning Valve

Float Switch

Drain

Pump-Out

Check Valve

Water Pump

Spray Tubes

Evaporator

Water

Tank

Pump-Out

Freeze/Harvest

Pump Timer

Refrigeration Circuit

Water Circuit

Page 40

B. Wiring Diagrams

1. KM-1601SAH (air-cooled)

Transformer Output

10.5V at 115V

PSIG

* High-Pressure Switch

Cut-In 327±21 PSIG

Cut-Out 412±

Page 41

2. KM-1601SAH3 (air-cooled)

Transformer Output

10.5V at 115V

* High-Pressure Switch

PSIG

Cut-Out 412±

Cut-In 327±21 PSIG

Page 42

3. KM-1601SWH (water-cooled), KM-1601SRH (remote air-cooled)

Transformer Output

10.5V at 115V

* High-Pressure Switch

PSIG

PSIG 412±

0 0

Water-Cooled Model Remote Model

Cut-Out 384±

Cut-In 284±21 PSIG 327±21 PSIG

Page 43

4. KM-1601SWH3 (water-cooled), KM-1601SRH3 (remote air-cooled)

Transformer Output

10.5V at 115V

* High-Pressure Switch

PSIG

PSIG 412±

0 0

Water-Cooled Model Remote Model

Cut-Out 384±

Cut-In 284±21 PSIG 327±21 PSIG

Page 44

C. Performance Data

1. KM-1601SAH (air-cooled)

APPROXIMATE ICE PRODUCTION PER 24 HR.

lbs./day kg./day APPROXIMATE ELECTRIC

CONSUMPTION

watts 100/38 APPROXIMATE WATER CONSUMPTION PER 24 HR.

gal./day m3/day FREEZING CYCLE TIME

min. 100/38 HARVEST CYCLE TIME

min. 100/38 HEAD PRESSURE

PSIG kg/cm2G

SUCTION PRESSURE

PSIG kg/cm2G

AMBIENT TEMP.

(ºF/ºC) 50/10 70/21 90/32

70/21 1462 663 1427 647 1307 593

80/27 1435 651 1381 627 1221 554

90/32 1427 647 1343 609 1198 543

100/38 1379 625 1309 594 1064 483

70/21

80/27

90/32

70/21 709 2.68

80/27 602 2.28 383 1.45 392 1.49

90/32 568 2.15 228 0.86 206 0.78

100/38 411 1.56 223 0.84 185 0.70

70/21

80/27

90/32

70/21

80/27 90/32

70/21 273 19.2

80/27 283 19.9 305 21.4 333 23.4 90/32 287 20.2 320 22.5 348 24.4

100/38 294 20.7 326 23.0 373 26.2

70/21 41 2.9 41 2.9 46 3.2

80/27 41 2.9 42 2.9 49 3.4 90/32 41 2.9 42 3.0 48 3.4

100/38 44 3.1 43 3.1 54 3.8

WATER TEMP. (ºF/ºC)

2450

2490

2503

2511

4.6

4.0

3.9 2.12.1

3.1

2503

2572

2630

2643

568 2.15 505 1.91

287 20.2 312 21.9

3.9

2.9

2.1

2563

2625

2687

2740

3.6

3.1

2.1

TOTAL HEAT OF REJECTION FROM CONDENSER

20,700 BTU/h [AT 90ºF (32ºC) / WT 70ºF (21ºC)]

Note:

1. Pressure data is recorded at 5 minutes into freezing cycle. The data not in bold should be used for reference only.

2. We reserve the right to make changes in specications and design without prior notice.

Page 45

2. KM-1601SAH3 (air-cooled)

APPROXIMATE ICE PRODUCTION PER 24 HR.

lbs./day kg./day APPROXIMATE ELECTRIC

CONSUMPTION

watts 100/38 APPROXIMATE WATER CONSUMPTION PER 24 HR.

gal./day m3/day FREEZING CYCLE TIME

min. 100/38 HARVEST CYCLE TIME

min. 100/38 HEAD PRESSURE

PSIG kg/cm2G

SUCTION PRESSURE

PSIG kg/cm2G

AMBIENT TEMP.

(ºF/ºC) 50/10 70/21 90/32

70/21 1456 660 1423 646 1313 596

80/27 1431 649 1381 626 1234 560

90/32 1423 646 1345 610 1211 549

100/38 1379 626 1314 596 1088 494

70/21

80/27

90/32

70/21 708 2.68

80/27 605 2.29 396 1.50 400 1.51

90/32 573 2.17 249 0.94 222 0.84

100/38 422 1.60 243 0.92 198 0.75

70/21

80/27

90/32

70/21

80/27 90/32

70/21 267 18.8

80/27 286 20.1 323 22.7 343 24.1 90/32 291 20.5 350 24.6 372 26.1

100/38 293 20.6 355 25.0 392 27.6

70/21 41 2.9 45 3.1 48 3.4

80/27 44 3.1 49 3.5 52 3.7 90/32 45 3.1 53 3.7 57 4.0

100/38 45 3.2 54 3.8 60 4.2

WATER TEMP. (ºF/ºC)

2370

2424

2440

2420

4.8

4.2

4.1 2.32.4

3.3

2440

2533

2610

573 2.17 510 1.93

291 20.5 316 22.2

4.1

3.1

2.4

2463

2515

2610

3.8

3.2

2.2

TOTAL HEAT OF REJECTION FROM CONDENSER

24,400 BTU/h [AT 90ºF (32ºC) / WT 70ºF (21ºC)]

Note:

1. Pressure data is recorded at 5 minutes into freezing cycle. The data not in bold should be used for reference only.

2. We reserve the right to make changes in specications and design without prior notice.

Page 46

3. KM-1601SWH (water-cooled)

APPROXIMATE ICE PRODUCTION PER 24 HR.

lbs./day kg./da

APPROXIMATE ELECTRIC CONSUMPTION

watts 100/38 APPROXIMATE WATER CONSUMPTION PER 24 HR.

gal./day m3/day FREEZING CYCLE TIME

min. 100/38 HARVEST CYCLE TIME

min. 100/38 HEAD PRESSURE

PSIG kg/cm2G

SUCTION PRESSURE

PSIG kg/cm2G

AMBIENT TEMP.

(ºF/ºC)

70/21 1492 677 1501 681 1419 643 80/27 1499 680 1513 686 1378 625

90/32 1501 681 1523 691 1408 639

100/38 1453 659 1496 679 1303 591

70/21

80/27

90/32

70/21 1628 6.16

80/27 1681 6.36 1789 6.77 2272 8.60

90/32 1697 6.43 1866 7.06 2297 8.70

100/38 1908 7.22 1967 7.44 2693 10.20

70/21 80/27

90/32

70/21

80/27 90/32

70/21 241 16.9 80/27 244 17.2 252 17.7 265 18.6

90/32 246 17.3 257 18.0 269 18.9

100/38 249 17.5 260 18.3 281 19.8

70/21 43 3.0 44 3.1 45 3.2

80/27 43 3.1 44 3.1 47 3.3 90/32 44 3.1 44 3.1 47 3.3

100/38 44 3.1 45 3.2 49 3.4

WATER TEMP. (ºF/ºC)

50/10 70/21 90/32

2300

2325

2332

2319

5.0

4.4

4.2 2.2

3.4

2332

2375

2410

2408

1697 6.43 2042 7.73

25 26

4.2

3.3

2.5

2.4

246 17.3 257 18.0

2335

2354

2400

2390

27 28

3.8

3.2

2.0

TOTAL HEAT OF REJECTION FROM CONDENSER 23,100 BTU/h [AT 90ºF (32ºC) / WT 70ºF (21ºC)]

TOTAL HEAT OF REJECTION FROM COMPRESSOR 3,300 BTU/h [AT 90ºF (32ºC) / WT 70ºF (21ºC)] WATER FLOW FOR CONDENSER 101 gal./h [AT 100ºF (38ºC) / WT 90ºF (32ºC)]

PRESSURE DROP OF COOLING WATER LINE less than 10 PSIG

Note:

1. Pressure data is recorded at 5 minutes into freezing cycle. The data not in bold should be used for reference only.

2. We reserve the right to make changes in specications and design without prior notice.

Page 47

4. KM-1601SWH3 (water-cooled)

APPROXIMATE ICE PRODUCTION PER 24 HR.

lbs./day kg./da

APPROXIMATE ELECTRIC CONSUMPTION

watts 100/38 APPROXIMATE WATER CONSUMPTION PER 24 HR.

gal./day m3/day FREEZING CYCLE TIME

min. 100/38 HARVEST CYCLE TIME

min. 100/38 HEAD PRESSURE

PSIG kg/cm2G

SUCTION PRESSURE

PSIG kg/cm2G

AMBIENT TEMP.

(ºF/ºC)

70/21 1555 705 1558 707 1466 665 80/27 1557 706 1562 708 1417 643

90/32 1558 707 1565 710 1440 653

100/38 1507 684 1536 697 1326 601

70/21

80/27

90/32

70/21 1714 6.49

80/27 1764 6.68 1866 7.06 2449 9.27

90/32 1779 6.73 1937 7.33 2455 9.29

100/38 2013 7.62 2059 7.79 2930 11.09

70/21 80/27

90/32

70/21

80/27 90/32

70/21 239 16.8 80/27 240 16.9 244 17.1 268 18.8

90/32 241 16.9 246 17.3 267 18.8

100/38 249 17.5 251 17.6 287 20.2

70/21 41 2.9 42 3.0 45 3.2

80/27 42 2.9 44 3.1 47 3.3 90/32 42 3.0 45 3.2 48 3.4

100/38 43 3.0 46 3.2 51 3.6

WATER TEMP. (ºF/ºC)

50/10 70/21 90/32

2270

2297

2305

2303

6.0

5.2

4.9 2.2

3.8

2305

2351

2390

2395

1779 6.73 2186 8.28

24 25

4.9

3.6

2.4

241 16.9 257 18.1

2332

2367

2411

2430

26 27

4.4

3.6

2.0

TOTAL HEAT OF REJECTION FROM CONDENSER 23,500 BTU/h [AT 90ºF (32ºC) / WT 70ºF (21ºC)]

TOTAL HEAT OF REJECTION FROM COMPRESSOR 3,200 BTU/h [AT 90ºF (32ºC) / WT 70ºF (21ºC)] WATER FLOW FOR CONDENSER 111 gal./h [AT 100ºF (38ºC) / WT 90ºF (32ºC)]

PRESSURE DROP OF COOLING WATER LINE less than 10 PSIG

Note:

1. Pressure data is recorded at 5 minutes into freezing cycle. The data not in bold should be used for reference only.

2. We reserve the right to make changes in specications and design without prior notice.

Page 48

5. KM-1601SRH with URC-21F (remote air-cooled) (auxiliary codes: R-0; R-1; some S-1)

This data applies to units with an 8 l/min water valve. The 8 l/min water valve is part number 3U0111-02 and has J248-032 stamped on the side of the valve facing the rear of the unit.

APPROXIMATE ICE PRODUCTION PER 24 HR.

lbs./day kg./day 100/38 1503 682 1439 653 1203 546 APPROXIMATE ELECTRIC

CONSUMPTION

watts 100/38 APPROXIMATE WATER CONSUMPTION PER 24 HR.

gal./day m3/day 100/38 348 1.32 251 0.95 226 0.86 FREEZING CYCLE TIME

min. 100/38 HARVEST CYCLE TIME

min. 100/38 HEAD PRESSURE

PSIG kg/cm2G 100/38 219 15.4 253 17.8 288 20.2 SUCTION PRESSURE

PSIG kg/cm2G 100/38 39 2.7 44 3.1 50 3.5

AMBIENT TEMP.

(ºF/ºC)

70/21 1583 718 1550 703 1435 651 80/27 1558 707 1507 684 1353 614

90/32 1550 703 1472 668 1332 604

70/21

80/27

90/32

70/21 503 1.90

80/27 448 1.69 335 1.27 336 1.27

90/32 430 1.63 255 0.96 240 0.91

70/21 80/27

90/32

70/21

80/27 90/32

70/21 201 14.1 80/27 211 14.9 233 16.4 254 17.8

90/32 215 15.1 248 17.4 269 18.9

70/21 36 2.5 38 2.7 41 2.9

80/27 38 2.6 41 2.9 44 3.1 90/32 38 2.7 43 3.0 47 3.3

50/10 70/21 90/32

2440

2485

2499

2507

6.7

5.9

5.7 3.2

4.6

WATER TEMP. (ºF/ºC)

2499

2576

2640

2655

430 1.63 396 1.50

23 25

5.7

4.3

3.2

215 15.1 235 16.5

2564

2633

2703

2760

5.4

4.6

3.2

26 28

TOTAL HEAT OF REJECTION FROM CONDENSER 24,600 BTU/h [AT 90ºF (32ºC) / WT 70ºF (21ºC)]

TOTAL HEAT OF REJECTION FROM COMPRESSOR 3,300 BTU/h [AT 90ºF (32ºC) / WT 70ºF (21ºC)] CONDENSER VOLUME 441 CU. IN (URC-21F)

Note:

1. Pressure data is recorded at 5 minutes into freezing cycle. The data not in bold should be used for reference only.

2. We reserve the right to make changes in specications and design without prior notice.

Page 49

6. KM-1601SRH with URC-21F (remote air-cooled) (auxiliary codes: some S-1; S-2 and

later)

APPROXIMATE ICE PRODUCTION PER 24 HR.

lbs./day kg./da

APPROXIMATE ELECTRIC CONSUMPTION

watts 100/38 APPROXIMATE WATER CONSUMPTION PER 24 HR.

gal./day m3/day FREEZING CYCLE TIME

min. 100/38 HARVEST CYCLE TIME

min. 100/38 HEAD PRESSURE

PSIG kg/cm2G

SUCTION PRESSURE

PSIG kg/cm2G

AMBIENT TEMP.

(ºF/ºC)

70/21 1564 709 1547 702 1468 666 80/27 1551 703 1524 691 1415 642

90/32 1547 702 1505 683 1407 638

100/38 1512 686 1482 672 1317 597

70/21

80/27

90/32

70/21 785 2.97

80/27 694 2.63 507 1.92 471 1.78

90/32 665 2.52 375 1.42 318 1.20

100/38 519 1.97 361 1.37 266 1.01

70/21 80/27

90/32

70/21

80/27 90/32

70/21 213 15.0 80/27 223 15.7 243 17.1 263 18.5

90/32 226 15.9 257 18.1 277 19.5

100/38 230 16.2 262 18.4 296 20.8

70/21 40 2.8 41 2.9 44 3.1

80/27 41 2.9 43 3.1 47 3.3 90/32 41 2.9 45 3.2 48 3.4

100/38 42 3.0 46 3.2 51 3.6

WATER TEMP. (ºF/ºC)

50/10 70/21 90/32

2610

2630

2636

5.6

4.8

4.6 2.2

3.6

2636

2671

2700

2712

665 2.52 583 2.21

25 27

4.6

3.4

2.4

2.3

226 15.9 245 17.2

2684

2725

2752

28002650

27 29

4.2

3.4

2.0

TOTAL HEAT OF REJECTION FROM CONDENSER 22,800 BTU/h [AT 90ºF (32ºC) / WT 70ºF (21ºC)]

TOTAL HEAT OF REJECTION FROM COMPRESSOR 3,300 BTU/h [AT 90ºF (32ºC) / WT 70ºF (21ºC)] CONDENSER VOLUME 441 CU. IN (URC-21F)

Note:

1. Pressure data is recorded at 5 minutes into freezing cycle. The data not in bold should be used for reference only.

2. We reserve the right to make changes in specications and design without prior notice.

Page 50

7. KM-1601SRH with URC-22F (remote air-cooled) (auxiliary codes: S-2 and later)

APPROXIMATE ICE PRODUCTION PER 24 HR.

lbs./day kg./da

APPROXIMATE ELECTRIC CONSUMPTION

watts 100/38 APPROXIMATE WATER CONSUMPTION PER 24 HR.

gal./day m3/day FREEZING CYCLE TIME

min. 100/38 HARVEST CYCLE TIME

min. 100/38 HEAD PRESSURE

PSIG kg/cm2G

SUCTION PRESSURE

PSIG kg/cm2G

AMBIENT TEMP.

(ºF/ºC)

70/21 1531 694 1519 689 1426 647 80/27 1522 690 1503 682 1368 620

90/32 1519 689 1490 676 1371 622

100/38 1475 669 1462 663 1261 572

70/21

80/27

90/32

70/21 755 2.86

80/27 665 2.52 481 1.82 444 1.68

90/32 637 2.41 352 1.33 294 1.11

100/38 493 1.87 338 1.28 241 0.91

70/21 80/27

90/32

70/21

80/27 90/32

70/21 207 14.5 80/27 217 15.2 237 16.7 258 18.1

90/32 220 15.5 252 17.7 273 19.2

100/38 224 15.8 257 18.1 292 20.5

70/21 40 2.8 42 2.9 44 3.1

80/27 41 2.9 44 3.1 47 3.3 90/32 42 2.9 46 3.2 49 3.4

100/38 42 3.0 46 3.3 51 3.6

WATER TEMP. (ºF/ºC)

50/10 70/21 90/32

2560

2593

2604

2606

5.5

4.8

4.6 2.3

3.6

2604

2662

2710

2719

637 2.41 555 2.10

26 28

4.6

3.5

2.6

2.5

220 15.5 240 16.9

2645

2693

2746

2780

28 30

4.1

3.4

2.0

TOTAL HEAT OF REJECTION FROM CONDENSER 21,000 BTU/h [AT 90ºF (32ºC) / WT 70ºF (21ºC)]

TOTAL HEAT OF REJECTION FROM COMPRESSOR 2,800 BTU/h [AT 90ºF (32ºC) / WT 70ºF (21ºC)] CONDENSER VOLUME 214 CU. IN (URC-22F)

Note:

1. Pressure data is recorded at 5 minutes into freezing cycle. The data not in bold should be used for reference only.

2. We reserve the right to make changes in specications and design without prior notice.

Page 51

8. KM-1601SRH3 with URC-21F (remote air-cooled) (auxiliary codes: R-0; R-1; some S-1)

This data applies to units with an 8 l/min water valve. The 8 l/min water valve is part number 3U0111-02 and has J248-032 stamped on the side of the valve facing the rear of the unit.

APPROXIMATE ICE PRODUCTION PER 24 HR.

lbs./day kg./day 100/38 1503 682 1439 653 1203 546 APPROXIMATE ELECTRIC

CONSUMPTION

watts 100/38 APPROXIMATE WATER CONSUMPTION PER 24 HR.

gal./day m3/day 100/38 348 1.32 251 0.95 226 0.86 FREEZING CYCLE TIME

min. 100/38 HARVEST CYCLE TIME

min. 100/38 HEAD PRESSURE

PSIG kg/cm2G 100/38 219 15.4 253 17.8 288 20.2 SUCTION PRESSURE

PSIG kg/cm2G 100/38 39 2.7 44 3.1 50 3.5

AMBIENT TEMP.

(ºF/ºC)

70/21 1583 718 1550 703 1435 651 80/27 1558 707 1507 684 1353 614

90/32 1550 703 1472 668 1332 604

70/21

80/27

90/32

70/21 503 1.90

80/27 448 1.69 335 1.27 336 1.27

90/32 430 1.63 255 0.96 240 0.91

70/21 80/27

90/32

70/21

80/27 90/32

70/21 201 14.1 80/27 211 14.9 233 16.4 254 17.8

90/32 215 15.1 248 17.4 269 18.9

70/21 36 2.5 38 2.7 41 2.9

80/27 38 2.6 41 2.9 44 3.1 90/32 38 2.7 43 3.0 47 3.3

50/10 70/21 90/32

2440

2485

2499

2507

6.7

5.9

5.7 3.2

4.6

WATER TEMP. (ºF/ºC)

2499

2576

2640

2655

430 1.63 396 1.50

23 25

5.7

4.3

3.2

215 15.1 235 16.5

2564

2633

2703

2760

26 28

5.4

4.6

3.2

TOTAL HEAT OF REJECTION FROM CONDENSER 24,600 BTU/h [AT 90ºF (32ºC) / WT 70ºF (21ºC)]

TOTAL HEAT OF REJECTION FROM COMPRESSOR 3,300 BTU/h [AT 90ºF (32ºC) / WT 70ºF (21ºC)] CONDENSER VOLUME 441 CU. IN (URC-21F)

Note:

1. Pressure data is recorded at 5 minutes into freezing cycle. The data not in bold should be used for reference only.

2. We reserve the right to make changes in specications and design without prior notice.

Page 52

9. KM-1601SRH3 with URC-21F (remote air-cooled) (auxiliary codes: some S-1; S-2 and

later)

APPROXIMATE ICE PRODUCTION PER 24 HR.

lbs./day kg./da

APPROXIMATE ELECTRIC CONSUMPTION

watts 100/38 APPROXIMATE WATER CONSUMPTION PER 24 HR.

gal./day m3/day FREEZING CYCLE TIME

min. 100/38 HARVEST CYCLE TIME

min. 100/38 HEAD PRESSURE

PSIG kg/cm2G

SUCTION PRESSURE

PSIG kg/cm2G

AMBIENT TEMP.

(ºF/ºC)

70/21 1585 719 1563 709 1464 664 80/27 1568 711 1535 696 1396 633

90/32 1563 709 1511 685 1387 629

100/38 1520 689 1482 672 1273 577

70/21

80/27

90/32

70/21 781 2.96

80/27 688 2.60 497 1.88 476 1.80

90/32 659 2.49 363 1.37 318 1.20

100/38 514 1.95 352 1.33 276 1.05

70/21 80/27

90/32

70/21

80/27 90/32

70/21 202 14.2 80/27 212 14.9 233 16.3 257 18.1

90/32 215 15.1 247 17.4 271 19.1

100/38 221 15.5 253 17.8 293 20.6

70/21 37 2.6 39 2.7 42 3.0

80/27 38 2.7 41 2.9 45 3.2 90/32 39 2.7 43 3.0 47 3.3

100/38 40 2.8 44 3.1 51 3.6

WATER TEMP. (ºF/ºC)

50/10 70/21 90/32

2580

2665

2691

2651

5.5

4.8

4.6 2.2

3.6

2691

2838

2960

2955

659 2.49 585 2.21

25 27

4.6

3.4

2.4

215 15.1 237 16.7

2712

2785

2939

2920

27 29

4.1

3.4

2.0

TOTAL HEAT OF REJECTION FROM CONDENSER 22,000 BTU/h [AT 90ºF (32ºC) / WT 70ºF (21ºC)]

TOTAL HEAT OF REJECTION FROM COMPRESSOR 3,200 BTU/h [AT 90ºF (32ºC) / WT 70ºF (21ºC)] CONDENSER VOLUME 441 CU. IN (URC-21F)

Note:

1. Pressure data is recorded at 5 minutes into freezing cycle. The data not in bold should be used for reference only.

2. We reserve the right to make changes in specications and design without prior notice.

Page 53

10. KM-1601SRH3 with URC-22F (remote air-cooled) (auxiliary codes: S-2 and later)

APPROXIMATE ICE PRODUCTION PER 24 HR.

lbs./day kg./da

APPROXIMATE ELECTRIC CONSUMPTION

watts 100/38 APPROXIMATE WATER CONSUMPTION PER 24 HR.

gal./day m3/day FREEZING CYCLE TIME

min. 100/38 HARVEST CYCLE TIME

min. 100/38 HEAD PRESSURE

PSIG kg/cm2G

SUCTION PRESSURE

PSIG kg/cm2G

AMBIENT TEMP.

(ºF/ºC)

70/21 1530 694 1521 690 1414 641 80/27 1523 691 1508 684 1349 612

90/32 1521 690 1498 679 1359 616

100/38 1468 666 1465 665 1231 558

70/21

80/27

90/32

70/21 704 2.66

80/27 624 2.36 462 1.75 435 1.65

90/32 599 2.27 348 1.32 301 1.14

100/38 474 1.79 337 1.27 259 0.98

70/21 80/27

90/32

70/21

80/27 90/32

70/21 220 15.4 80/27 233 16.4 260 18.3 258 18.2

90/32 237 16.7 279 19.6 281 19.8

100/38 233 16.4 279 19.6 283 19.9

70/21 40 2.8 42 3.0 45 3.2

80/27 42 2.9 45 3.2 48 3.4 90/32 42 3.0 47.6 3.3 50 3.5

100/38 43 3.0 48 3.4 53 3.7

WATER TEMP. (ºF/ºC)

50/10 70/21 90/32

2490

2555

2575

5.3

4.7

4.5 2.4

3.6

2575

2687

2780

2779

599 2.27 531 2.01

27 28

4.5

3.5

2.7

2.6

237 16.7 244 17.2

2599

2659

2775

27702548

29 31

4.1

3.4

2.2

TOTAL HEAT OF REJECTION FROM CONDENSER 26,400 BTU/h [AT 90ºF (32ºC) / WT 70ºF (21ºC)]

TOTAL HEAT OF REJECTION FROM COMPRESSOR 3,500 BTU/h [AT 90ºF (32ºC) / WT 70ºF (21ºC)] CONDENSER VOLUME 214 CU. IN (URC-22F)

Note:

1. Pressure data is recorded at 5 minutes into freezing cycle. The data not in bold should be used for reference only.

2. We reserve the right to make changes in specications and design without prior notice.

Page 54

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.

2. Risk of electric shock. Use extreme caution and exercise safe electrical practices.

3. Moving parts (e.g., fan blade) can crush and cut. Keep hands clear.

4. CHOKING HAZARD: Ensure all components, fasteners, and thumbscrews are securely in place after the unit is serviced. Make sure that none have fallen into the storage bin.

5. Make sure all food zones in the icemaker and storage bin are clean after the unit is serviced. For cleaning procedures, see "VI. Cleaning and Maintenance."

A. Diagnostic Procedure

The diagnostic procedure is basically a sequence check which can be used at unit startup or for system diagnosis. 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 (KM-1601SAH/3 "G"CB) dip switch 1 through 5 are in the factory default position. S4 dip switch 1, 2, 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 TBC.

2) Turn on the power supply, then move the control switch to the "ICE" position. A 5-second delay occurs. CB red "POWER OK" LED and green "BC CLOSED" LED (KM-1601SAH/3 "G"CB) turn on. If red "POWER OK" LED is off, clear ice away from TBC bulb in the storage bin area. If no ice is near TBC bulb or the LED does not turn on even after clearing away ice, check TBC. See "IV.C. Bin Control Check." If yellow "BC OPEN" LED (KM-1601SAH/3 "G"CB) is on (indicating a full bin), conrm that CB K4 jumper is in place.

3) 1-Minute Fill Cycle – LED 4 is on. WV and X11 relay (KM-1601SAH/3) 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 water tank and closes F/S (low water safety). Diagnosis: Conrm that water is lling the water tank. If not, check that the water supply shut-off valve is open and WV screen and any external lters are clear. If WV does not energize (LED 4 on), check CB K1 ten-pin connector pin #6 (Owire) for 115VAC. If no voltage is present, CB is bad and must be replaced. If voltage is present, check WV connections and solenoid continuity. 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."

Page 55

4) Initial Harvest Cycle – LEDs 1, 4, and 2 are on. WV and X11 relay (KM-1601SAH/3) remain energized, Comp, FM/FMR, HGV, and X10 relay (KM-1601SAH/3) 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 & 2). The harvest timer has settings of 60, 90, 120, and 180 seconds.

KM-1601SAH/3 "G" CB: WV is energized during harvest for a maximum of 6 minutes or the length of harvest minus 50 seconds, whichever is shorter. 50seconds before the harvest timer terminates, LED 4 turns off, WV and X-11 relay de-energize, LED3turns on and PM energizes for the last 50seconds of harvest.

CAUTION! S4 dip switch 7must remain in the factory default position of 7on. Otherwise, PM will not energize during the last 50 seconds of harvest. Adjustment outside of the factory default position may result in damage to the icemaker. PM is energized through CB K1 ten-pin connector pin #5 (DBU wire)

and the X10 relay.

KM-1601SWH/3, KM-1601SRH/3 "E" CB: WV is energized during harvest for a maximum of 6 minutes or the length of harvest, whichever is shorter.

When the harvest timer terminates, 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 2 minutes.

Diagnosis: Check that Comp, FM/FMR, HGV, and WV are energized. Average initial harvest cycle at factory setting is 2 to 3 minutes. 1.5 minutes after initial harvest begins, touch Comp discharge line. Is it hot? If not, check that Comp is energized, refrigerant pressures are in range, HGV is energized and open, LLV is de-energized and closed. If discharge line is hot, touch the inlet line to the evaporator. If discharge line is hot, place a thermometer on the suction line next to the thermistor. Has it warmed to 48°F (9°C) or warmer? Conrm thermistor status. See "IV.E. Thermistor Check."

KM-1601SAH/3 "G" CB: If temperature has been reached, check that WV and X-11 relay de-energize (LED 4 off) and PM energizes (LED 3on) to circulate water over evaporator for the last 50seconds of harvest. If not, make sure S4dip switch 7 is in the factory default position. Check CB K1 ten-pin connector pin #5 (DBU wire) for 115VAC. Also check X10 relay. X10 relay and X10 relay terminal #4 must be energized for PM to rotate in the proper direction.

All: If 1-minute ll cycle starts after the harvest timer terminates, see "IV.D. Float Switch Check and Cleaning." If the thermistor reading is in proper range and CB fails to terminate the harvest cycle and initiate the freeze cycle, CB is bad and must be replaced.

Page 56

5) Freeze Cycle – LED 1 is on. Comp and FM/FMR remain energized, PM energizes or, for KM-1601SAH/3, remains energized. LLV energizes. HGV and X10 relay (KM-1601SAH/3) 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 during the rst 5 minutes of freeze). After the 5-minute short cycle protection timer terminates, CB turns freeze termination over to F/S. Diagnosis: Check that Comp, FM/FMR, PM, and LLV are energized. Conrm that the evaporator temperature drops. Ifnot, conrm that LLV has energized and is open. Make sure WV and HGV are de-energized and closed. Next, conrm proper unit pressures and TXV operation, check for an inefficient Comp or an inoperative HM. 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 freeze. 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. For short freeze cycle, check that reservoir is full at beginning of freeze, pump-out check valve is not leaking by, and drain plug is in and not leaking. Note: Normal freeze cycle will last 20 to 40 minutes depending on model and

conditions. Cycle times and pressures should follow performance data provided in this manual. 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! for KM-1601SAH/3:

Do not adjust S4 dip switch 3 & 4 to 3 off and 4 on. Adjustment to this position on this model prevents the pump motor from rotating in the pump-out direction.

Comp and FM/FMR remain energized, HGV energizes. WV energizes if S4 dip switch 3off and 4 on. LLV de-energizes. PM de-energizes for 2 seconds, then reverses for 10/20 seconds depending on pump-out timer S4 dip switch 3 & 4 setting. When the pump-out timer terminates, the pump-out is complete. The pump-out frequency control is factory set for every 10th cycle (except for KM-1601SRH/3 utilizing 3U0111-02 water valve), 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 2, 5, or 10 cycles. Timing of the rst pump-out is dependent on the control board. For KM-1601SAH/3 "G" CB, rst pump-out is dependent on S4 dip switch 5 & 6. See the table below. For KM-1601SWH/3 and KM-1601SRH/3 "E" CB, rst pump-out occurs after the rst freeze cycle.

KM-1601 SAH/3 "G" & KM-1601SWH/3 & KM-1610SRH/3 "E" Control Board Settings

1st Pump-Out

S4 Dip Switch Setting

Pump-Out

Frequency

OFF OFF Every cycle After 2nd freeze cycle After 1st freeze cycle

ON OFF Every 2 cycles After 3rd freeze cycle

OFF ON Every 5 cycles After 6th freeze cycle

ON ON Every 10 cycles After 11th freeze cycle

KM-1601SAH/3

"G" Control Board

KM-1601SWH/3

KM-1601SRH/3

"E" Control BoardNo. 5 No. 6

Page 57

Diagnosis:

KM-1601SAH/3 "G" CB: If PM does not reverse, check to see if 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, PM rotates in the freeze cycle rotation. See "III.B. Wiring Diagrams." Check PM circuit and capacitor, check CB K1 ten-pin connector pin #5 (DBU wire) for voltage. Also check X10 relay. X10 relay must be de-energized and X10 relay terminal #2 must be energized for PM to rotate in the proper direction. If water does not pump out, check and clean the pump-out check valve assembly and tubing.

KM-1601SWH/3, KM-1601SRH/3 "E" CB: If PM does not energize, check PM circuit and capacitor, check CB K1 ten-pin connector pin #5 (DBU wire) for voltage. If water does not pump out, check and clean the pump-out 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 TBC bulb, TBC switch opens within 10 seconds, shutting down the unit (CB red "POWER OK" LED turns off). TBC 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: 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.); L LV –liquid line valve; PM–pump motor; TBC–thermostatic bin control; TXV–thermostatic expansion valve; WV–inlet water valve

Page 58

B. Control Board Check

Before replacing CB 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. Always choose a white neutral wire to establish a good neutral connection when checking voltages.

Alarm Reset: If CB is in alarm (beeping), press the "ALARM RESET" button on CB while

it is beeping. WARNING!Risk of electric shock. Care should be taken not to touch live terminals. Once reset, the unit starts at the 1-minute ll cycle. For audible alarm information, see "II.C.2. 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(KM-1601SAH/3 "G"CB) dip switch 1 through 5 are in the factory default position. S4 dip switch 1, 2, 5, 6 are cleaning adjustments and the settings are exible. For factory default settings, see "II.C.3.a) Default Dip Switch Settings."

2) Move the control switch to the "ICE" position. If CB red "POWER OK" LED is on, the control voltage is good. If CB red "POWER OK" LED is off, clear ice away from TBC bulb in the storage bin area. If no ice is near TBC bulb or CB red "POWER OK" LED does not turn on even after clearing away ice, check TBC. See "IV.C. Bin Control Check." If TBC is okay (closed) and CB red "POWER OK" LED is off, check the fuse, control switch contacts, HPS, and CT secondary circuit. CT output is 10.5V at 115V primary input. If the secondary circuit has proper voltage and CB red "POWER OK" LED is off, CB is bad and should be replaced.

If CT secondary circuit does not have proper voltage, check the CT primary circuit.

Check for 115V at CB K1 ten-pin connector. Check the #10 pin (BR wire) to a white neutral wire for 115V. For additional checks, see "IV.G.1. No Ice Production."

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. For the correct lighting sequence, see the table below. Note that the order of the LEDs from the outer edge of CB is 1, 4, 3, 2. Components (e.g., compressor) will cycle during the test.

Control

Model

KM-1601SAH/3 "G" 1, 4, 3, 2

KM-1601SWH/3, KM-1601SRH/3 "E" 2, 3, 4, 1

Board

Correct LED Lighting Sequence

Following the test, the icemaker resumes operation. If the LEDs do not turn on as described above, CB is bad and should be replaced.

4) To verify voltage output from CB to the components, slide CB 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 CB K1 ten-pin connector to ground. If output voltage is not present and the appropriate LED is on, CB is bad and must be replaced.

Legend: CB–control board; CT–control transformer; HPS–high-pressure switch;

TBC–thermostatic bin control

Page 59

C. Bin Control Check

To check TBC, follow the steps below.

CAUTION

When the ambient temperature is below 45°F (7°C), TBC switch opens and shuts down the icemaker even if the ice storage bin is empty. When TBC 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.

TBC is factory set, and generally no adjustment is required. However, adjustment may be needed in some conditions, particularly at higher altitude locations. Note that when TBC switch is open, CB red "POWER OK" LED is off.

1) Turn off the power supply.

2) Remove the front panel, then move the control switch to the "OFF" position.

3) Clear any ice away from TBC bulb.

4) Remove the control box cover, then disconnect TBC wires from TBC switch.

5) Hold your hand around TBC bulb to warm it up.

6) Check for continuity across TBC switch. If closed, continue to step 6. If open, adjust or replace TBC.

7) With the multimeter test leads still in place, hold ice on TBC bulb to lower the temperature. Within 10 seconds, TBC switch should open (no continuity). If it remains closed, adjust or replace TBC.

Legend: CB–control board; TBC–thermostatic bin control

Page 60

D. Float Switch Check and Cleaning

F/S is used to determine that there is sufficient water in the water tank after the 1-minute ll cycle and after each harvest cycle. F/S is also used to determine that the appropriate volume of water has been converted into ice before switching out of the freeze cycle. No adjustment is required.

1. Float Switch Check

To check F/S, follow the steps below.

1) Turn off the power supply.

2) Remove the front panel, then move the control switch to the "OFF" position.

3) Remove the insulation panel, then remove the drain plug located on the lower front part of the ice chute. See Fig. 1. Allow the water tank to drain.

4) Replace the drain plug in its correct position. Be careful not to cross thread it.

5) Remove the control box cover.

6) Disconnect the black F/S connector from CB BLACK K5 connector.

Ice Chute

Float Switch Assembly

Fig. 1

Drain Plug

7) Check for continuity across F/S leads. With the water tank empty, F/S should be open. If open, continue to step 8. If closed, follow the steps in "IV.D.2. Float Switch Cleaning." After cleaning F/S, check it again. Replace if necessary.

8) Reconnect the black F/S connector to CB 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, F/S 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, then move the control switch to the "OFF" position.

12) Remove the control box cover.

13) Disconnect the black F/S connector from CB BLACK K5 connector.

14) Check for continuity across F/S leads. With the water tank full, F/S should be closed. If F/S is closed and the icemaker will not switch from the 1-minute ll cycle to the initial harvest cycle, replace CB.

If open, conrm that the water tank is full. If the water tank is not full, check the water supply, water lters, and WV. If the water tank is full, follow the steps in "IV.D.2. Float Switch Cleaning." After cleaning F/S, check it again. Replace if necessary.

Page 61

2. Float Switch Cleaning

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

1) Turn off the power supply.

2) Remove the front panel, then move the control switch to the "OFF" position.

3) Remove the insulation panel, then remove the drain plug located on the lower front part of the ice chute. See Fig. 1. Allow the water tank to drain.

4) Replace the drain plug in its correct position. Be careful not to cross thread it.

5) Disconnect the vent tube and the ush tube from the top of F/S, then remove F/S assembly from the mounting bracket and remove the rubber boot from the bottom of F/S assembly. See Fig. 2.

6) Remove the retainer rod from the bottom of F/S assembly, then remove the oat. Be careful not to bend the retainer rod excessively when removing it.

7) Wipe down F/S assembly's housing, shaft, oat, and retainer rod with a mixture of 1 part Hoshizaki "Scale Away" and 25 parts warm water. Clean the inside of the rubber boot and hose with cleaning solution. Rinse the parts thoroughly with clean water.

8) Reassemble F/S 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.

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

Legend: CB–control board; F/S–oat switch; WV–inlet water valve

Vent

Flush

Shaft

Fig. 2

Float Switch Housing

Float

Rubber Boot and Hose

Retainer Rod

Page 62

E. Thermistor Check

To check thermistor resistance, follow the steps below.

1) Turn off the power supply.

2) Remove the front panel, then move the control switch to the "OFF" position.

3) Remove the control box cover.

4) Remove the thermistor.

5) Immerse the thermistor sensor portion in a glass containing ice and water for 2 or 3 minutes.

6) Disconnect the white thermistor connector from CB WHITE K3 connector and check the resistance between thermistor leads. Normal range is 4.7 to 6.2 kΩ. If outside the normal range, replace the thermistor. See "V.B. Important Notes for Component Replacement." If within the normal range, continue to the next step.

7) Replace the thermistor in its correct position. See "V.B. Important Notes for Component Replacement."

8) Reconnect the white thermistor connector to CB 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.

12) The harvest timer should terminate and end the harvest cycle within 2 to 3 minutes. If the harvest timer does not terminate and end the harvest cycle, the harvest timer is bad and CB must be replaced.

Legend: CB–control board

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

WRV is factory set, and generally no adjustment is required. However, when necessary, adjust WRV using the procedure below.

1) Prepare a thermometer to check the condenser drain temperature. Attach a pressure gauge to the high-side line of the system.

2) Five minutes after a freeze cycle starts, conrm that the thermometer reads 104°F to 115°F (40°C to 46°C). If it does not, use a at blade screwdriver to rotate the adjustment screw on WRV until the temperature is in the proper range (rotate counterclockwise to raise the temperature or clockwise to lower the temperature). See Fig. 3. 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

CCW – Higher CW – Lower

Adjustment Screw

Fig. 3

3) Check that the condenser drain temperature is stable.

Legend: WRV–water-regulating valve

Page 63

G. Diagnostic Charts

Before consulting the diagnostic charts, check for correct installation, proper voltage per unit nameplate, and adequate water supply. Check the control board 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 (KM-1601SAH/3 "G"CB) dip switch 1 through 5 are in the factory default position. S4 dip switch 1, 2, 5, 6 are cleaning adjustments and the settings are exible. For factory default settings, see "II.C.3.a) Default Dip Switch Settings."

1. No Ice Production

No Ice Production - Possible Cause

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

b) Not within specications.

2. Main Transformer (230V/115V) (3 Phase Only)

3. Water Supply a) Water supply off or improper water pressure.

4. Interlock Switch (Cleaning Valve)

5. Thermostatic Bin Control See "IV.C. Bin Control Check."

6. Fuse (Control Box) a) Blown.

7. Control Switch a) Bad contacts.

8. High-Pressure Switch a) Bad contacts.

9. Control Transformer (115V/10.5V)

10. Control Board See "IV.B. Control Board Check."

11. Thermistor See "IV.E. Thermistor Check."

12. Hot Gas Valve a) Open in freeze cycle.

a) Coil winding open or shorted.

b) External water lters clogged.

a) Open position.

b) Bad contacts.

a) Tripped with bin lled with ice.

b) Ambient temperature too cool.

c) Set too warm.

d) Bulb out of position.

e) Bad contacts.

b) Dirty air lter (air-cooled models).

c) Clogged condenser.

d) Ambient temperature too warm.

e) Refrigerant overcharged.

f) Fan not operating (air-cooled and remote air-cooled models).

g) Refrigerant lines or components plugged.

h) Headmaster (C.P.R.) open (remote air-cooled models).

i) Condenser water temperature too warm (water-cooled models).

j) Insufficient water supply to condenser (water-cooled models).

k) Water regulating valve out of adjustment or defective (water-cooled

models).

l) Condenser water temperature too warm.

a) Coil winding open or shorted.

a) In alarm.

b) Defective.

a) Leads shorted or open.

b) Closed in harvest cycle.

Page 64

No Ice Production - Possible Cause

13. Inlet Water Valve a) Mesh lter or orice clogged.

b) Coil winding open.

c) Open in freeze cycle.

14. Float Switch See "IV.D. Float Switch Check and Cleaning."

15. Compressor a) Compressor relay/magnetic contactor contacts bad or coil winding

16. Pump Motor a) Motor winding open.

1 7. Pump-Out Check Valve a) Leaking by.

18. Water System a) Water leaks causing short freeze time.

19. Fan Motor a) Motor winding open.

20. Liquid Line Valve (if applicable) a) Closed in freeze cycle.

2 1. Thermostatic Expansion Valve

(TXV)

22. Headmaster (C.P.R.) (remote condenser unit)

23. Water Regulating Valve (water-cooled model) See "IV.F. Adjustment of Water Regulating Valve."

a) Float does not move freely.

b) Defective.

open.

b) Start capacitor or run capacitor defective.

c) Internal overload protector open.

d) Starter contacts bad or coil winding open.

e) Protector tripped.

f) Compressor defective.

b) Bearing worn out or locked rotor.

c) Defective capacitor.

d) Mechanical seal worn out.

b) Bearing worn out or locked rotor.

c) Defective capacitor.

b) Open in harvest cycle.

a) Bulb loose.

b) Operating erratically.

a) Open out of temperature/pressure range.

a) Insufficient water supply.

b) Out of adjustment or defective.

c) Clogged.

Page 65

2. Freeze Up

Defrost and clean the unit prior to diagnosing freeze up. See "VI.A. Cleaning and Sanitizing Instructions."

Freeze Up - Possible Cause

Harvest Cycle

1. Evaporator a) Scaled up.

b) Damaged.

2. Separators a) Out of position.

b) Damaged.

3. Cube Guide a) Out of position.

b) Damaged.

4. Inlet Water Valve a) Water valve screen clogged.

b) Defective.

5. Spray Tubes and/or Spray Guides

6. Refrigerant Charge a) Low.

7. Ambient Temperature a) Too cool.

8. Water Supply a) Low water pressure.

9. Thermostatic Bin Control See "IV.C. Bin Control Check."

10. Control Board See "IV.B. Control Board Check."

11. Thermistor See "IV.E. Thermistor Check."

12. Hot Gas Valve a) Closed.

13. Liquid Line Valve (if applicable) a) Open.

14. Thermostatic Expansion Valve (TXV)

15. Water Regulating Valve (water-cooled model)

1. Evaporator a) Scaled up.

2. Separators a) Out of position.

3. Spray Tubes and/or Spray Guides

4. Refrigerant charge. a) Low.

5. Check Valve a) Defective.

6. Control Board See "IV.B. Control Board Check."

a) Dirty.

b) Out of position.

b) External water lters clogged.

c) Insufficient water line size.

Minimum 3/8" nominal ID copper water tubing or equivalent.

a) Extension bracket not installed.

b) Bulb out of position.

c) Bad contacts.

a) Harvest timer set too short.

b) Defective.

a) Loose, disconnected, or defective.

a) Defective.

a) Leaking by.

b) Defective.

Freeze Cycle

b) Damaged.

a) Dirty.

b) Out of position.

a) Freeze timer set incorrectly.

b) Defective.

Page 66

Freeze Up - Possible Cause

7. Inlet Water Valve a) Leaking by.

8. Float Switch See "IV.D. Float Switch Check and Cleaning."

9. Pump Motor a) RPM too slow.

10. Thermostatic Expansion Valve (TXV)

11. Headmaster (C.P.R.) (remote condenser unit)

12. Water Regulating Valve (water-cooled model) See "IV.F. Adjustment of Water Regulating Valve."

a) Float does not move freely.

b) Defective.

b) Impeller damaged.

a) Defective.

a) Out of adjustment.

3. Low Ice Production

Low Ice Production - Possible Cause

Long Harvest Cycle

1. Evaporator a) Scaled up.

2. Spray Tubes and/or Spray Guides

3. Refrigerant Charge a) Low.

4. Water Supply a) Low water pressure.

5. Control Board See "IV.B. Control Board Check."

6. Thermistor See "IV.E. Thermistor Check."

7. Hot Gas Valve a) Erratic or closed.

8. Inlet Water Valve a) Water valve screen clogged.

9. Compressor a) Inefficient or off.

10. Liquid Line Valve (if applicable) a) Erratic or open.

11. Thermostatic Expansion Valve (TXV)

12. Water Regulating Valve (water-cooled model)

1. Evaporator a) Scaled up.

2. Refrigerant Charge a) Low.

3. Air Filter (air-cooled model) a) Clogged.

4. Condenser a) Clogged.

5. Condenser (water-cooled model) a) Water temperature out of specication.

a) Dirty.

b) Out of position.

b) External water lters clogged.

c) Insufficient water line size.

Minimum 3/8" nominal ID copper water tubing or equivalent.

d) Too cold.

a) Thermistor connection loose (K3).

b) Defective.

a) Loose, disconnected, or defective.

a) Defective.

a) Leaking by.

Long Freeze Cycle

Page 67

Low Ice Production - Possible Cause

6. Control Board See "IV.B. Control Board Check."

7. Hot Gas Valve a) Erratic or open.

8. Inlet Water Valve a) Leaking by.

9. Float Switch See "IV.D. Float Switch Check and Cleaning."

10. Compressor a) Inefficient or off.

11. Pump Motor a) RPM too slow.

12. Liquid Line Valve (if applicable) a) Erratic or closed.

13. Expansion Valve (TXV) a) Bulb loose.

14. Headmaster (C.P.R.) (remote condenser unit)

15. Water Regulating Valve (water-cooled model) See "IV.F. Adjustment of Water Regulating Valve."

a) Float switch connection loose (K5).

b) Defective.

a) Float does not move freely or defective switch.

b) Defective.

a) Not bypassing.

a) Insufficient water supply.

b) Out of adjustment or defective.

c) Clogged.

Page 68

V. Replacement of Components

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.

2. Move the control switch to the "OFF" position and turn off the power supply before servicing. Lockout/Tagout to prevent the power from being turned back on inadvertently.

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

1. Repairs requiring the refrigeration circuit to be opened must be performed by properly trained and EPA-certied service personnel.

WARNING

2. Always recover the refrigerant and store it in an approved container. Do not discharge the refrigerant into the atmosphere.

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

CAUTION

1. Do not leave the system open for longer than 15 minutes when replacing or servicing parts. The Polyol Ester (POE) oils used in R-404A units can absorb moisture quickly. Therefore it is important to prevent moisture from entering the system when replacing or servicing parts.

2. Always install a new drier every time the sealed refrigeration system is opened.

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 250°F (121°C).

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.

Page 69

2. Brazing

WARNING

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

2. 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.

2. 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 250°F (121°C).

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

3. Evacuation and Recharge (R-404A)

1) Attach a vacuum pump to the system. Be sure to connect the charging hoses to both 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.

2) 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 29.9" Hg vacuum. Evacuating period depends on pump capacity.

Page 70

4) Close the high and low-side valves 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 required when charging an R-404A system (to prevent fractionation). Place the service cylinder on the scales; if the service cylinder is not equipped with a dip tube, invert the service cylinder, then place it on the scales. Open the high-side valve on the gauge manifold.

7) Allow the system to charge with liquid until the proper charge weight is met.

8) If necessary, add any remaining charge to the system through the low-side.

CAUTION!To prevent compressor damage, 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. Close the high and low-side gauge manifold valves, then disconnect the gauge manifold hoses.

10) Cap the service valves to prevent a possible leak.

Page 71

B. Important Notes for Component Replacement

CAUTION

When replacing a component listed below, see the notes to help ensure proper operation.

Component Notes

Compressor Install a new start capacitor, run capacitor, and start relay.

Thermostatic Expansion Valve

Hot Gas Valve Liquid Line Valve

Fan Motor Install a new capacitor.

Pump Motor Install a new capacitor.

Thermistor •Attachthenewthermistortothesuctionlineinthesamelocationastheprevious

•Attachthethermostaticexpansionvalvebulbtothesuctionlineinthesamelocationas

the previous bulb.

•Thebulbshouldbebetweenthe10and2o'clockpositiononthetube.

•Securethebulbwiththeclampandholder,theninsulateit.

•Replacethestrainerwhenreplacingthehotgasvalve.

•Usecoppertubeofthesamediameterandlengthwhenreplacingvalvelines.

thermistor.

•Thethermistorshouldbeatthe12o'clockpositiononthetube.

•Smoothlylltherecessedareaofthethermistorholderwithhighthermalconductive

type sealant. Hoshizaki America part number 4A0683-01 (Silicone Heat Sink Compound 10-8108 manufactured by GC Electronics), KE-4560 RTV (manufactured by ShinEtsu Silicones), or equivalent are recommended.

•Securethethermistorwiththeholder,theninsulateit.

•Beverycarefultopreventdamagetotheleads.

Thermistor Lead

Foam Insulation

Thermistor Holder

Cable Tie

Page 72

VI. Cleaning and Maintenance

This icemaker must be cleaned and maintained in accordance with the instruction manual and labels provided with the icemaker. Consult with your local distributor about cleaning and maintenance service. To obtain the name and phone number of your local distributor, visit www.hoshizaki.com or call Hoshizaki Technical Support at 1-800-233-1940 in the USA.

WARNING

1. Only qualied service technicians should service this icemaker.

2. CHOKING HAZARD: Ensure all components, fasteners, and thumbscrews are securely in place after any cleaning or maintenance is done to the unit. Make sure that none have fallen into the storage bin.

3. The storage bin is for ice use only. Do not store anything else in the storage bin.

A. Cleaning and Sanitizing Instructions

Hoshizaki recommends cleaning and sanitizing this unit at least once a year. More frequent cleaning and sanitizing, however, may be required in some existing water conditions.

WARNING

1. To prevent injury to individuals and damage to the icemaker, do not use ammonia type cleaners.

2. Carefully follow any instructions provided with the bottles of cleaning and sanitizing solution.

3. Always wear liquid-proof gloves and goggles to prevent the cleaning and sanitizing solutions from coming into contact with skin or eyes.

4. To prevent damage to the water pump seal, do not operate the icemaker with the control switch in the "WASH" position when the water tank is empty.

IMPORTANT

1. The cleaning valve is opened during cleaning and sanitizing to allow solution ow to the inside of the evaporator. It should be closed for all icemaking operation. The compressor will not operate unless this valve is completely closed.

2. To close the cleaning valve, the valve handle should be at a right angle to the valve body. To open the cleaning valve, the valve handle should be parallel to the valve body.

CLOSED

Normal Icemaking Operation

OPEN

Cleaning and Sanitizing Operation

(allows solution ow to the inside of the evaporator)

Page 73

1. Cleaning Procedure

1) Dilute 27 . oz. (800 ml) of Hoshizaki "Scale Away" with 5 gal. (19 l) of warm water.

2) 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 back on

after 3 minutes. The harvest cycle starts and the cubes will be removed from the evaporator.

3) Turn off the power supply.

4) Remove the front panel, then remove the insulation panel by rst removing the thumbscrew, lifting up the panel slightly and pulling it towards you.

5) Remove the drain plug located on the lower front part of the ice chute. Allow the water tank to drain.

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

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. Remove the rubber boot from the bottom of the assembly.

b. Remove the retainer rod from the bottom of the oat switch housing, 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.

12) 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 drain plug. Allow the water tank to drain. Replace the drain plug 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.

20) Turn off the power supply after 3 minutes.

Page 74

21) Remove the front panel and fully open the cleaning valve.

22) Move the control switch to the "WASH" position.

23) Replace the front panel in its correct position.

24) Turn on the power supply to rinse off the cleaning solution.

25) Turn off the power supply after 5 minutes.

26) Remove the front panel and the insulation panel.

27) Remove the drain plug. Allow the water tank to drain. Replace the drain plug and the insulation panel in their correct positions. Note: Do not replace the insulation panel when you proceed to "2. Sanitizing

Procedure."

28) Repeat steps 16 through 27 three more times to rinse thoroughly. Note: If you do not sanitize the icemaker, go to step 9 in "2. Sanitizing Procedure."

2. Sanitizing Procedure - Following Cleaning Procedure

1) Dilute 2.5 . oz. (74 ml or 5 tbs) of a 5.25% sodium hypochlorite solution (chlorine bleach) with 5 gal. (19 l) of warm water.

2) Pour the sanitizing solution into the water tank.

3) Replace the insulation panel and the front panel in their correct positions. Note: Make sure 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 drain plug. Allow the water tank to drain. Replace the drain plug and the insulation panel in their correct positions.

8) Repeat steps 16 through 27 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.

12) Clean the storage bin liner using a neutral cleaner. Rinse thoroughly after cleaning.

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

Page 75

B. Maintenance

This icemaker must be maintained individually, referring to the instruction manual and labels provided with the icemaker.

WARNING

1. Only qualied service technicians should service this icemaker.

2. Move the control switch to the "OFF" position and turn off the power supply before servicing. Lockout/Tagout to prevent the power supply from being turned back on inadvertently.

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 buildup.

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 (air-cooled model)

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 (air-cooled 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

CAUTION

1. When storing the icemaker for an extended time or in sub-freezing temperatures, follow the instructions below to prevent damage.

2. To prevent damage to the water pump seal, do not operate the icemaker with the control switch in the "WASH" position when the water tank is empty.

When the icemaker is not used for two or three days under normal conditions, it is sufficient to move the control switch to the "OFF" position. When storing the icemaker for an extended time or in sub-freezing temperatures, follow the instructions below.

1. Remove the water from the icemaker water supply line:

1) Turn off the power supply, then remove the front panel.

2) Move the control switch on the control box to the "OFF" position.

3) Close the icemaker water supply line shut-off valve, then open the icemaker water supply line drain valve.

Page 76

4) Allow the line to drain by gravity.

5) Attach a compressed air or carbon dioxide supply to the icemaker water supply line drain valve.

6) Move the control switch to the "ICE" position.

7) Replace the front panel in its correct position, then turn on the power supply.

8) Blow the icemaker water supply line out using the compressed air or carbon dioxide supply.

9) Close the icemaker water supply line drain valve.

2. Drain the water tank:

1) Turn off the power supply, then remove the front panel. Move the control switch to the "OFF" position.

2) Remove the insulation panel. Remove the drain plug located on the lower front part of the ice chute. See Fig. 1. Allow the water tank to drain.

3) Replace the drain plug and the insulation panel in their correct positions. Be careful not to cross thread the drain plug.

4) Remove all ice from the storage bin. Clean the storage bin using a neutral cleaner. Rinse thoroughly after cleaning.

5) Replace the front panel in its correct position.

3. On water-cooled model only, rst remove the water from the water-cooled

condenser:

1) Make sure the power supply is off, then remove the front panel and right side panel.

2) Close the condenser water supply line shut-off valve. If connected to a closed loop system, also close the condenser return line shut-off valve.

3) Open the condenser water supply line drain valve. If connected to a closed loop system, also open the condenser return line 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).

7) Replace the right side panel and front panel in their correct positions.

Page 77

2013 ADDENDUM

A. Dip Switch Settings

1) S4 Dip Switch Settings

S4 Dip Switch

Dip Switch No.

Model Auxiliary Code

KM-1601SWH/3 B-1 and Later OFF OFF OFF OFF ON ON OFF OFF OFF ON

KM-1601SRH/3 B-1 and Later ON OFF OFF OFF ON ON OFF OFF OFF OFF

2) S5 Dip Switch Settings

S5 Dip Switch (Do Not Adjust)

Model Auxiliary Code

KM-1601SWH/3 B-1 and Later OFF OFF OFF OFF OFF

KM-1601SRH/3 B-1 and Later OFF OFF OFF OFF OFF

1 2 3 4 5 6 7 8 9 10

Dip Switch No.

1 2 3 4 5

S4 Dip Switch

1 2 3 4 5 6 7 8 9 10

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)

Harvest Timer (1 & 2)

S5 Dip Switch

Do Not Adjust

1 2 3 4 5

Rell Counter (2 through 5)

Float Switch Selector (1)

A-1

Page 78

B. Wiring Diagram

1. KM-1601SWH and KM-1601SRH B-1 and Later

A-2

*High-Pressure Switch

PSIG

PSIG 412±

Water-Cooled Model Remote Model

Cut-out 384±

Cut-in 284±22 PSIG 327±22 PSIG

Page 79

4. KM-1601SWH3 and KM-1601SRH3 B-1 and Later

A-3

*High-Pressure Switch

PSIG

PSIG 412±

Water-Cooled Model Remote Model

Cut-out 384±

Cut-in 284±22 PSIG 327±22 PSIG

Hoshizaki KM-1601SAH-3 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Important Safety Information

A. Icemaker

B. Condenser Unit

II. General Information

A. Construction

B. Sequence of Operation

1. Sequence Cycles and Shutdown

a) KM-1601SAH/3 "G" Control Board

b) KM-1601SWH/3 and KM-1601SRH/3 "E" Control Board

2. Sequence Flow Chart

a) KM-1601SAH/3 "G" Control Board

b) KM-1601SWH/3 and KM-1601SRH/3 "E" Control Board

C. Control Board

1. Control Board Layout

a) KM-1601SAH/3 "G" Control Board

b) KM-1601SWH/3 and KM-1601SRH/3 "E" Control Board

2. LED Lights and Audible Alarm Safeties

a) KM-1601SAH/3 "G" Control Board

b) KM-1601SWH/3 and KM-1601SRH/3 "E" Control Board

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/Bin Control Selector (S4 dip switch 7)

f) Factory Use (S4 dip switch 8)

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

h) Float Switch Selector (S5 dip switch 1), KM-1601SAH/3 "G" Control Board

D. Control Switch

III. Technical Information

A. Water Circuit and Refrigeration Circuit

1. KM-1601SAH/3 (air-cooled)

2. KM-1601SWH/3 (water-cooled)

3. KM-1601SRH/3 (remote air-cooled)

B. Wiring Diagrams

1. KM-1601SAH (air-cooled)

2. KM-1601SAH3 (air-cooled)

3. KM-1601SWH (water-cooled), KM-1601SRH (remote air-cooled)

4. KM-1601SWH3 (water-cooled), KM-1601SRH3 (remote air-cooled)

C. Performance Data

IV. Service Diagnosis

A. Diagnostic Procedure

B. Control Board Check

C. Bin Control Check

D. Float Switch Check and Cleaning

1. Float Switch Check

2. Float Switch Cleaning

E. Thermistor Check

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

G. Diagnostic Charts

1. No Ice Production

2. Freeze Up

3. Low Ice Production

V. Replacement of Components

A. Service for Refrigerant Lines

1. Refrigerant Recovery

2. Brazing

3. Evacuation and Recharge (R-404A)

B. Important Notes for Component Replacement

VI. Cleaning and Maintenance

A. Cleaning and Sanitizing Instructions

1. Cleaning Procedure

2. Sanitizing Procedure - Following Cleaning Procedure

B. Maintenance

C. Preparing the Icemaker for Long Storage