Hoshizaki KM-1601SWH User manual

Hoshizaki
“A Superior Degree
of Reliability”
www.hoshizaki.com
Models
KM-1601SWH
KM-1601SWH3
KM-1601SRH
KM-1601SRH3
Stackable Crescent Cuber
Hoshizaki America, Inc.
Number: 73145
Issued: 10-31-2006
Revised: 10-4-2007
SERVICE MANUAL
™


IMPORTANT
Only qualified service technicians should attempt to install, service, or maintain
this 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, and warranty coverage.
HOSHIZAKI provides this manual primarily to assist qualified service technicians in the
service and maintenance of the icemaker.
Should the reader have any questions or concerns which have not been satisfactorily
addressed, please call, 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: [phone] Technical Service
[phone]
Fax: [phone]
[phone]
E-mail: techsuppor[email protected]
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


CONTENTS
I. Specifications...................................................................................................................... 5
A. Icemaker ....................................................................................................................... 5
1. KM-1601SWH (water-cooled).................................................................................. 5
2. KM-1601SWH3 (water-cooled)................................................................................ 6
3a. KM-1601SRH (remote air-cooled) (auxiliary codes: R-0; R-1; some S-1) ............. 7
3b. KM-1601SRH (remote air-cooled) (auxiliary codes: some S-1; S-2 and later) ...... 8
4a. KM-1601SRH3 (remote air-cooled) (auxiliary codes: R-0; R-1; some S-1) ........... 9
4b. KM-1601SRH3 (remote air-cooled) (auxiliary codes: some S-1; S-2 and later) .. 10
B. Condensing Unit.......................................................................................................... 11
1. URC-21F ............................................................................................................... 11
II. General Information ......................................................................................................... 13
A. Construction................................................................................................................ 13
1. KM-1601SWH, KM-1601SWH3 (water-cooled)..................................................... 13
2. KM-1601SRH, KM-1601SRH3 (remote air-cooled)............................................... 14
B. Sequence of Operation ............................................................................................... 15
1. One Minute Fill Cycle ............................................................................................ 15
2. Initial Harvest Cycle .............................................................................................. 15
3. Freeze Cycle ......................................................................................................... 15
4. Pump-Out Cycle ................................................................................................... 15
5. Normal Harvest Cycle .......................................................................................... 15
C. Control Board.............................................................................................................. 17
1. Control Board Layout............................................................................................. 18
2. Features ................................................................................................................ 19
a) Maximum Water Supply Period – 6 minutes....................................................... 19
b) Harvest Backup Timer and Freeze Timer ........................................................... 19
c) High Temperature Safety .................................................................................... 19
d) Low Water Safety ............................................................................................... 19
e) High Voltage and Low Voltage Cut-outs ............................................................. 19
f) LED Lights and Audible Alarm Safeties............................................................... 20
3. Controls and Adjustments ..................................................................................... 21
a) Default Dip Switch Settings ................................................................................ 21
b) Harvest Timer (dip switch 1 & 2) ........................................................................ 21
c) Pump-Out Timer (dip switch 3 & 4)..................................................................... 22
d) Pump-Out Frequency Control (dip switch 5 & 6) ................................................ 22
e) Freeze Timer (dip switch 9 & 10)........................................................................ 23
4. Control Board Check Procedure............................................................................ 23
5. Control Board Replacement .................................................................................. 24
D. Harvest Control – Thermistor ...................................................................................... 24
E. Bin Control .................................................................................................................. 24
IMPORTANT
This manual should be read carefully before the icemaker is serviced or
maintenance operations are performed. Only qualified service technicians
should install, service, and maintain the icemaker. Read the warnings
contained in this booklet carefully as they give important information regarding
safety. Please retain this booklet for any further reference that may be
necessary.


III. Technical Information ...................................................................................................... 25
A. Water Circuit and Refrigeration Circuit........................................................................ 25
1. KM-1601SWH, KM-1601SWH3 (water-cooled)..................................................... 25
2. KM-1601SRH, KM-1601SRH3 (remote air-cooled)............................................... 26
B. Wiring Diagrams.......................................................................................................... 27
1. KM-1601SWH (water-cooled), KM-1601SRH (remote air-cooled) ........................ 27
2. KM-1601SWH3 (water-cooled), KM-1601SRH3 (remote air-cooled) .................... 28
C. Performance Data ....................................................................................................... 29
1. KM-1601SWH (water-cooled)................................................................................ 29
2. KM-1601SWH3 (water-cooled).............................................................................. 30
3a. KM-1601SRH (remote air-cooled) (auxiliary codes: R-0; R-1; some S-1) ........... 31
3b. KM-1601SRH (remote air-cooled) (auxiliary codes: some S-1; S-2 and later) .... 32
4a. KM-1601SRH3 (remote air-cooled) (auxiliary codes: R-0; R-1; some S-1) ......... 33
4b. KM-1601SRH3 (remote air-cooled) (auxiliary codes: some S-1; S-2 and later) .. 34
IV. Service Diagnosis........................................................................................................... 35
A. 10-Minute KM Diagnostic Procedure ......................................................................... 35
B. Diagnostic Charts........................................................................................................ 36
1. No Ice Production .................................................................................................. 36
2. Evaporator is Frozen Up........................................................................................ 40
3. Low Ice Production ................................................................................................ 41
4. Abnormal Ice ......................................................................................................... 41
5. Other...................................................................................................................... 42
V. Removal and Replacement of Components .................................................................... 43
A. Service for Refrigerant Lines ...................................................................................... 43
1. Refrigerant Recovery............................................................................................. 43
2. Brazing .................................................................................................................. 43
3. Evacuation and Recharge (R-404A)...................................................................... 44
B. Removal and Replacement of Compressor ................................................................ 45
C. Removal and Replacement of Expansion Valve ......................................................... 46
D. Removal and Replacement of Hot Gas Valve and Line Valve ..................................... 47
E. Removal and Replacement of Evaporator .................................................................. 48
F. Removal and Replacement of Water Regulating Valve - Water Cooled Model Only.... 48
G. Adjustment of Water Regulating Valve - Water-Cooled Model Only ........................... 49
H. Removal and Replacement of Headmaster (Condensing Pressure Regulator - C.P.R.)
- Remote Air-Cooled Model Only.............................................................................. 50
I. Removal and Replacement of Thermistor .................................................................... 51
J. Removal and Replacement of Fan Motor .................................................................... 52
K. Removal and Replacement of Inlet Water Valve ......................................................... 52
L. Removal and Replacement of Pump Motor................................................................. 53
VI. Cleaning and Maintenance............................................................................................. 54
A. Cleaning and Sanitizing Instructions........................................................................... 54
1. Cleaning Procedure............................................................................................... 55
2. Sanitizing Procedure - Following Cleaning Procedure .......................................... 56
B. Maintenance................................................................................................................ 57
C. Preparing the Icemaker for Long Storage................................................................... 57


I. Specifications
A. Icemaker
1. KM-1601SWH (water-cooled)
Note: We reserve the right to make changes in specifications and design without prior
notice.
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 Pressure Regulator
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 specifications and design without prior
notice.
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.) 2410(3.7) 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.)
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 Pressure Regulator
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
2. KM-1601SWH3 (water-cooled)


3a. KM-1601SRH (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.
Note: We reserve the right to make changes in specifications and design without prior
notice.
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
- 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
CONDENSER Air-Cooled Remote, Condenser Unit URC-21F
EVAPORATOR Vertical type, Stainless Steel and Copper
REFRIGERANT CONTROL Thermostatic Expansion Valve
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


3b. KM-1601SRH (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 part number 4A1176-04 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(4.3) 2610(4.0)
WATER gal./24HR (gal./100 lbs.) 375(24.9) 785(50.2)
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
- 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
CONDENSER Air-Cooled Remote, Condenser Unit URC-21F
EVAPORATOR Vertical type, Stainless Steel and Copper
REFRIGERANT CONTROL Thermostatic Expansion Valve
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 specifications and design without prior
notice.


4a. KM-1601SRH3 (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.
Note: We reserve the right to make changes in specifications and design without prior
notice.
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
- 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
CONDENSER Air-Cooled Remote, Condenser Unit URC-21F
EVAPORATOR Vertical type, Stainless Steel and Copper
REFRIGERANT CONTROL Thermostatic Expansion Valve
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

10
4b. KM-1601SRH3 (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 part number 4A1176-04 and
has the part number stamped on the side of the valve facing the front of the unit.
AC SUPPLY VOLTAGE 208-230/60/3
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(4.7) 2580(3.9)
WATER gal./24HR (gal./100 lbs.) 363(24.0) 781(49.3)
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
- 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
CONDENSER Air-Cooled Remote, Condenser Unit URC-21F
EVAPORATOR Vertical type, Stainless Steel and Copper
REFRIGERANT CONTROL Thermostatic Expansion Valve
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 specifications and design without prior
notice.

11
B. Condensing Unit
1. URC-21F Unit: mm (inches)

1
SPECIFICATIONS
MODEL: 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 AEROQUIP)
Liquid Line 5/8"-18 UNF Fitting (#6 AEROQUIP)
CONDENSER Air-cooled, Fin and tube type
FAN MOTOR PROTECTION Thermal Protection
REFRIGERANT CONTROL Condensing Pressure Regulator
REFRIGERANT CHARGE R-404A 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

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II. General Information
A. Construction
1. KM-1601SWH, KM-1601SWH3 (water-cooled)
Evaporator Assembly
Spray Tubes
Inlet Water
Valve
Water Supply Inlet
Hot Gas Valve
Junction Box
Water-cooled
Condenser
Check Valves
Control Box
Water Regulator
Drier
Transformer Box
(KM-1601SWH3)
Capacitor Box
(KM-1601SWH)
Control Switch
Bin Control Thermostat
Compressor
Cleaning Valve
Float Switch
Water Pump
Check Valve
(water)
Expansion Valves
Liquid Line Valve

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2. KM-1601SRH, KM-1601SRH3 (remote air-cooled)
Evaporator Assembly
Spray Tubes
Inlet Water
Valve Water Supply Inlet
Hot Gas Valve
Junction Boxes
Receiver Tank
Check Valves
Control Box
Liquid Line Valve
Drier
Transformer Box
(KM-1601SRH3)
Capacitor Box
(KM-1601SRH)
Control Switch
Bin Control Thermostat
Compressor
Cleaning Valve
Float Switch
Water Pump
Check Valve
(water)
Expansion Valves

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B. Sequence of Operation
The steps in the sequence are as outlined below. When power is supplied, a 5 second
delay occurs at startup. Note that the order of the LEDs from the outer edge of the board is
1, 4, 3, 2.
1. One Minute Fill Cycle
LED 4 is on. WV opens and the fill period begins. After 1 minute, the board checks for
a closed F/S. If F/S is closed, the harvest cycle begins. If not, WV will remain energized
through additional 1 minute cycles until water enters the sump and F/S closes. This serves
as a low water safety to protect the water pump.
2. Initial Harvest Cycle
LEDs 1, 4, and 2 are on. WV remains open, Comp and FMR energize, HGV opens,
and harvest begins. As the evaporator warms, the thermistor located on the suction line
checks for a 48°F (9°C) temperature. When 48°F (9°C) is reached, a 3.9 kΩsignal turns
the harvest over to the adjustable harvest timer which is factory set for normal conditions.
The timer has settings of 60, 90, 120, and 180 seconds (dip switch 1 & 2). The water valve
is open during harvest for a maximum of 6 minutes or the length of harvest, whichever is
shorter. When the harvest timer completes its count down, the harvest cycle is complete
and the freeze cycle starts. The minimum total time allowed by the board for a complete
harvest cycle is 2 minutes.
3. Freeze Cycle
LED 1 is on. Comp and FMR continue to run, PM and FMS energize, LLV opens, HGV
and WV close, and the freeze cycle starts. For the first 5 minutes the control board will not
accept a signal from F/S. This 5 minute minimum freeze acts as a short cycle protection. At
the end of 5 minutes, F/S assumes control. As ice builds on the evaporator the water level
in the sump lowers. The freeze continues until F/S opens and terminates ice production.
4. Pump-Out Cycle
LEDs 1, 3, and 2 are on. Comp and FMR continue to run, HGV opens, LLV closes, and
FMS deenergizes. PM stops for 2 seconds and reverses, taking water from the bottom of
the sump and forcing pressure against the check valve seat allowing water to go through
the check valve and down the drain. At the same time water flows through the small tube
to power flush the F/S. When the pump-out timer stops counting, the pump out is complete.
Pump out always occurs on the 2nd harvest after startup. Then, depending on the control
board setting, pump out occurs every cycle, or every 2nd, 5th, or 10th cycle (dip switch 5 &
6).
5. Normal Harvest Cycle
LEDs 1, 4, and 2 are on. Comp and FMR continue to run, HGV remains open, and WV
opens. As the evaporator warms, the thermistor reaches 48°F (9°C). The control board
then receives the thermistor's 3.9 kΩsignal and starts the harvest timer. The water valve
is open during harvest for a maximum of 6 minutes or the length of harvest, whichever is
shorter. When the harvest timer completes its count down, the harvest cycle is complete
and the next freeze cycle starts. The unit continues to cycle through 3, 4, and 5 sequence
until the bin control senses ice and shuts the unit down.
Legend: Comp–compressor; FMR–remote fan motor; FMS–self-contained fan motor;
F/S–float switch; HGV–hot gas valve; LLV–Liquid Line Valve; PM–pump motor;
WV–inlet water valve

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1. One Minute
Fill Cycle
2. Harvest Cycle 3. Freeze Cycle
4. Pump-Out
Cycle
Cycle Steps
WV Energized
F/S open
F/S closed
Comp energized HGV energized FMR energized WV continues
Thermistor temp reaches 48°F (9°C) (3.9 kΩor less)
Harvest timer starts
F/S open
Comp continues
FMR continues HGV de-energized WV de-energized PM energized
FMS energized
F/S closed
Freeze cycle operation turned over to F/S
Pump motor stops for 2 sec. and then reverses for 10/20 sec. each 1, 2, 5, or 10 cycles. Comp continues FMR continues HGV energized FMS de-energized
F/S Check
F/S Check
• Maximum inlet water valve time: 6 minutes • Maximum harvest time: 20 minutes
Thermistor in control
1 to 3 minute timer in control
• Minimum freeze time: 5 minutes • Maximum freeze time: freeze timer setting
5 minute timer in control
F/S in control
Initial startup always begins here
"E" board will have 5 second delay
If F/S is open, compressor stops and cycle returns to 1 minute fill
KM-1601SWH/3, KM-1601SRH/3 Sequence Flow Chart and Component Operation
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 flow over the outside of the evaporator plate assembly. With the cleaning valve open, the cleaner and sanitizer flow 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 re-start when the control switch is placed in the "ICE" position.
Legend: Comp - compressor FMR - remote fan motor FMS - self-contained fan motor F/S - float switch HGV - hot gas valve PM - pump motor WV - inlet water valve

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C. Control Board
• A HOSHIZAKI exclusive solid-state control is employed in KM-1601SWH,
KM-1601SWH3, KM-1601SRH, and KM-1601SRH3 Stackable Crescent Cubers.
• All models are pretested and factory-adjusted.
CAUTION
1. Fragile, handle very carefully.
2. A 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 board.
3. Do not touch the electronic devices on the board or the back of the board to
prevent damage to the board.
4. Do not change wiring and connections. Do not misconnect K3, K4, and K5,
because the same connector is used for the thermistor and float switch. K4 is
not connected.
5. Always replace the whole board assembly if it goes bad.
6. Do not short out power supply to test for voltage.

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Control Board
Part Number 2A1410-01 (factory); 2A1410-02 (service)
Type HOS-001A (Control Products - 10 Pin)
Control Products "E" Control Board
1. Control Board Layout
Output Test Switch
(used to test relays on board)
Connector K3
Harvest Control
(thermistor)
Connector K4
Open
(not connected)
Microprocessor
(board revision level
indicated by last 2
digits on label)
Connector K5
Float Switch
Part Number
Connector K1
Pins #1 through #10
#1, 9 Magnetic Contactor
#2 Hot Gas Valve
#3 Line Valve
Self-Contained Fan Motor (FMS)
#4 Pump Motor (icemaking)
#5 Pump Motor (drain)
#6 Water Valve
#7, 10 Power (line, bin control)
#8 Open
Switch for "C" board
and "ALPINE" board
(service boards only)
Alarm Reset Switch
Backup Freeze
Timer LED
Dip Switch
Backup Harvest
Timer LED
Alarm Buzzer
Power LED
(lights when
power is supplied
to the board)
Relay LEDs (4)
(indicate which
relays are energized
as listed below)
LED 2
Hot Gas Valve (HGV)
Self-Contained Fan
Motor (FMS) (FMS
off when LED on)
LED 3
Pump Motor (PM)
(on at pump out only)
LED 4
Water Valve (WV)
LED 1
Compressor (Comp)
Remote Fan Motor
(FMR)
Transformer
Connector

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2. Features
a) Maximum Water Supply Period – 6 minutes
Inlet water valve opening, in the harvest cycle, is limited by the harvest timer. The water
valve cannot remain open longer than the maximum period. The water valve can close in
less than six minutes if the harvest cycle is completed.
b) Harvest Backup Timer and Freeze Timer
The harvest backup timer shuts down the icemaker if, for two cycles in a row, the harvest
cycle takes more than 20 minutes to complete. The control board will signal this problem
using 2 beeps every 3 seconds.
The freeze timer shuts down the icemaker if, for two cycles in a row, the freeze cycle
takes longer than the time specified to complete. The control board will signal this
problem using 3 beeps every 3 seconds. The time is factory set using dip switches 9 &
10.
The reset button on the control board must be pressed with power on to reset either of
these safeties.
c) High Temperature Safety
The temperature of the suction line in the refrigeration circuit is limited by the high
temperature safety. This protects the unit from excessively high temperatures. If the
evaporator temperature rises above 127 ± 7°F (53 ± 4°C), the thermistor operates the
safety. This shuts down the circuit and the icemaker automatically stops.
The control board will signal this problem using 1 beep every 3 seconds. The reset button
on the control board must be pressed with power on to reset the safety.
d) Low Water Safety
If the pump motor is operated without water, the mechanical seal can fail. To prevent this
type of failure, the control board checks the position of the float switch at the end of the
initial one minute water fill cycle and at the end of each harvest cycle.
If the float switch is in the up position (electrical circuit closed), the control board changes
to the ice making cycle. If the float switch is in the down position (electrical circuit open),
the control board changes to additional one minute water fill cycles until water enters the
sump and the float switch closes. When the float switch closes, the control board changes
to the ice making cycle. The unit will not start without adequate water in the sump. This
serves as a low water safety to protect the pump motor from mechanical seal failure.
For water-cooled model, if the water is shut off, the unit is protected by the high pressure
switch.
e) High Voltage and Low Voltage Cut-outs
The maximum and minimum allowable supply voltages of this icemaker are limited by the
high voltage and low voltage cut-outs.
If miswiring (especially on single phase 3 wire models) causes excessive voltage (147Vac
±5% or more) on the control board, the high voltage cut-out shuts down the circuit
in 3 seconds and the icemaker automatically stops. The control board will signal this
problem using 7 beeps every 3 seconds.
The icemaker also automatically stops in cases of insufficient voltage (92Vac ±5% or
less). The control board will signal this problem using 6 beeps every 3 seconds.
When the proper supply voltage is resumed, the icemaker automatically starts running
again.

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f) LED Lights and Audible Alarm Safeties
The red LED indicates proper control voltage and will remain on unless a control voltage
problem occurs. At startup a 5 second delay occurs while the board conducts an internal
timer check. A short beep occurs when the power is turned off.
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 board is 1, 4, 3,
2. For more information, see "II.B. Sequence of Operation."
Sequence Step LED Energized
Components
Time LEDs are On
Min. Max. Avg.
1 Minute Fill Cycle 4 WV 60 seconds
Harvest Cycle 1, 4, and 2 WV, HGV,
Comp, FMR
2 minutes 20 minutes 3 to 5 minutes
Freeze Cycle 1 Comp, PM,
FMR/FMS,
LLV
5 minutes freeze timer
setting
30 to 35 minutes
Reverse Pump Out 1, 3, and 2 Comp, HGV,
PM, FMR
10 seconds 20 seconds factory setting
The built in safeties shut down the unit and have alarms as follows:
No. of Beeps
(every 3 sec.) Type of Alarm Notes
1 High Evaporator Temp.
(temperature > 127°F)
(53°C)
Check for harvest problem (stuck HGV or
relay), hot water entering unit, stuck HM,
or shorted thermistor.
2 Harvest Backup Timer
(harvest > 20 min. for two
cycles in a row)
Orange LED marked H TIMER lights up.
Check for open thermistor, HGV not
opening, TXV leaking by, low charge, or
inefficient compressor.
3 Freeze Timer
(freeze > specified setting
for two cycles in a row)
Timer is factory set using
dip switches 9 & 10
Yellow LED marked F TIMER lights up.
Check for F/S stuck closed (up), WV
leaking by, HGV leaking by, TXV not
feeding properly, low charge, HM not
bypassing, or inefficient compressor.
To manually reset the above safeties, press the alarm reset button with the power
supply on.
6 Low Voltage
(92Vac ±5% or less)
Red LED will turn off if voltage protection
operates.
The control voltage safeties automatically
reset when voltage is corrected.
7 High Voltage
(147Vac ±5% or more)
Legend: Comp–compressor; FMR–remote fan motor; FMS–self-contained fan motor;
F/S–float switch; HGV–hot gas valve; HM–headmaster (C.P.R.); LLV–Liquid
Line Valve; PM–pump motor; TXV–thermostatic expansion valve; WV–inlet
water valve