Hoshizaki KM-901MAH User manual

1
Hoshizaki
“A Superior Degree
of Reliability”
www.hoshizaki.com
Models
KM-901MAH
KM-901MWH
KM-901MRH/3
Modular Crescent Cuber
Hoshizaki America, Inc.
SERVICE MANUAL
™
Number: 73156
Issued: 4-18-2008
Revised: 6-23-2009

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: [phone] Technical Support
[phone]
Fax: [phone]
[phone]
E-mail: [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. 

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 ................................................................................................. 6
I. Specications...................................................................................................................... 7
A. Icemaker ....................................................................................................................... 7
1a. KM-901MAH (air-cooled) Auxiliary Code T-0, U-0.................................................. 7
1b. KM-901MAH (air-cooled) Auxiliary Code U-1 and Later ........................................ 8
2a. KM-901MWH (water-cooled) Auxiliary Code T-0, U-0 ............................................ 9
2b. KM-901MWH (water-cooled) Auxiliary Code U-1 and Later................................. 10
3a. KM-901MRH (remote air-cooled) Auxiliary Code T-0, U-0 ....................................11
3b. KM-901MRH (remote air-cooled) Auxiliary Code U-1 and Later .......................... 12
4a. KM-901MRH3 (remote air-cooled) Auxiliary Code T-0, U-0 ................................. 13
4b. KM-901MRH (remote air-cooled) Auxiliary Code U-1 and Later .......................... 14
B. Condenser Unit ........................................................................................................... 15
1. URC-9F.................................................................................................................. 15
II. General Information ......................................................................................................... 17
A. Construction................................................................................................................ 17
1. KM-901MAH (air-cooled)........................................................................................ 17
2. KM-901MWH (water-cooled) ................................................................................. 18
3. KM-901MRH/3 (remote air-cooled)........................................................................ 19
B. Sequence of Operation ............................................................................................... 20
1. Sequence Cycles and Shutdown ........................................................................... 20
a) "E" Control Board: Auxiliary Code T-0, U-0 ...................................................... 20
b) "G" Control Board: Auxiliary Code U-1 and Later............................................. 21
2. Sequence Flow Chart............................................................................................ 24
a) "E" Control Board: Auxiliary Code T-0, U-0....................................................... 24
b) "G" Control Board: Auxiliary Code U-1 and Later............................................. 25
C. Control Board .............................................................................................................. 26
1. Control Board Layout ............................................................................................. 27
2. Features................................................................................................................. 29
a) Maximum Water Supply Period - 6 minutes ..................................................... 29
b) Harvest Backup Timer and Freeze Timer......................................................... 29
c) High Temperature Safety.................................................................................. 29
d) Low Water Safety............................................................................................. 29
e) High Voltage and Low Voltage Cut-outs........................................................... 29
f) LED Lights and Audible Alarm Safeties ............................................................ 30

4
3. Controls and Adjustments...................................................................................... 32
a) Default Dip Switch Settings.............................................................................. 32
b) Harvest Timer (S4 dip switch 1 & 2)................................................................. 32
c) Pump-Out Timer (S4 dip switch 3 & 4)............................................................. 33
d) Pump-Out Frequency Control (S4 dip switch 5 & 6)......................................... 33
e) Bin Control Selector/Harvest Pump Timer (S4 dip switch 7) ............................ 34
f) Factory Use (S4 dip switch 8) ........................................................................... 34
g) Freeze Timer (S4 dip switch 9 & 10) ................................................................ 35
h) Float Switch Control (S5 dip switch 1): "G" Control Board .............................. 35
i) Rell Counter (S5 dip switch 2 through 5): "G" Control Board........................... 35
D. Bin Control .................................................................................................................. 36
1. Thermostatic Bin Control: Auxiliary Code T-0, U-0 ................................................. 36
2. Mechanical Bin Control: Auxiliary Code U-1 and Later.......................................... 36
E. Float Switch................................................................................................................. 36
F. Thermistor.................................................................................................................... 36
G. Control Switch............................................................................................................. 36
III. Technical Information ...................................................................................................... 37
A. Water Circuit and Refrigeration Circuit ........................................................................ 37
1. KM-901MAH (air-cooled)........................................................................................ 37
2. KM-901MWH (water-cooled) ................................................................................. 38
3. KM-901MRH/3 (remote air-cooled)........................................................................ 39
B. Wiring Diagrams.......................................................................................................... 40
1. Thermostatic Bin Control: Auxiliary Code T-0, U-0 ................................................. 40
a) KM-901MAH (air-cooled) and KM-901MWH (water-cooled)............................. 40
b) KM-901MRH (remote air-cooled) ..................................................................... 41
c) KM-901MRH3 (remote air-cooled).................................................................... 42
2. Mechanical Bin Control: Auxiliary Code U-1 and Later .......................................... 43
a) KM-901MAH (air-cooled) and KM-901MWH (water-cooled)............................. 43
b) KM-901MRH (remote air-cooled) ..................................................................... 44
c) KM-901MRH3 (remote air-cooled).................................................................... 45
C. Performance Data ....................................................................................................... 46
1. KM-901MAH (air-cooled)........................................................................................ 46
2. KM-901MWH (water-cooled) ................................................................................. 47
3. KM-901MRH (remote air-cooled)........................................................................... 48
4. KM-901MRH3 (remote air-cooled)......................................................................... 49
IV. Service Diagnosis ........................................................................................................... 50
A. Diagnostic Procedure .................................................................................................. 50
B. Control Board Check ................................................................................................... 53
C. Bin Control Check ....................................................................................................... 54
1. Thermostatic Bin Control Check: Auxiliary Code T-0, U-0 ...................................... 54
2. Mechanical Bin Control Check and Cleaning: Auxiliary Code U-1 and Later......... 55
a) Mechanical Bin Control Check......................................................................... 55
b) Mechanical Bin Control Cleaning..................................................................... 56
D. Float Switch Check and Cleaning ............................................................................... 57
1. Float Switch Check ................................................................................................ 57
2. Float Switch Cleaning............................................................................................ 58
E. Thermistor Check........................................................................................................ 59
F. Diagnostic Charts ........................................................................................................ 60

5
V. Removal and 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. Removal and Replacement of Compressor................................................................. 70
C. Removal and Replacement of Expansion Valve.......................................................... 71
D. Removal and Replacement of Hot Gas Valve or Liquid Line Valve ............................. 72
E. Removal and Replacement of Evaporator................................................................... 73
F. Removal and Replacement of Air-Cooled Condenser...................................................74
G. Removal and Replacement of Water-Cooled Condenser............................................ 75
H. Removal and Replacement of Remote Air-Cooled Condenser ................................... 76
I. Removal and Replacement of Water Regulating Valve (water-cooled model) .............. 77
J. Adjustment of Water Regulating Valve (water-cooled model)....................................... 78
K. Removal and Replacement of Headmaster (Condensing Pressure Regulator - C.P.R.)
(remote air-cooled model) ......................................................................................... 78
L. Removal and Replacement of Thermistor ................................................................... 79
M. Removal and Replacement of Fan Motor (air-cooled and remote air-cooled models) 80
N. Removal and Replacement of Inlet Water Valve ......................................................... 80
O. Removal and Replacement of Pump Motor ................................................................ 81
P. Removal and Replacement of Control Board............................................................... 82
VI. Cleaning and Maintenance............................................................................................. 83
A. Cleaning and Sanitizing Instructions ........................................................................... 83
1. Cleaning Procedure................................................................................................ 84
2. Sanitizing Procedure - Following Cleaning Procedure ........................................... 85
B. Maintenance ............................................................................................................... 86
C. Preparing the Icemaker for Long Storage ................................................................... 86

6
Important Safety Information
Throughout this manual, notices appear to bring your attention to situations which could
result in death, serious injury, or damage to the unit.
WARNING Indicates a hazardous situation which could result in death or
serious injury.
CAUTION Indicates a situation which could result in damage to the unit.
IMPORTANT Indicates important information about the use and care of the
unit.
WARNING
This icemaker should be destined only to the use for which it has been
expressly conceived. Any other use should be considered improper and
therefore dangerous. The manufacturer cannot be held responsible for
eventual damage caused by improper, incorrect, and unreasonable use.
To reduce the risk of death, electric shock, serious injury, or re, follow
basic precautions including the following:
•Electricalconnectionmustbehard-wiredandmustmeetnational,state,and
local electrical code requirements. Failure to meet these code requirements
could result in death, electric shock, serious injury, re, or severe damage to
equipment.
•Thisunitrequiresanindependentpowersupply.Seethenameplatefor
proper voltage and breaker/fuse size. Failure to use a proper breaker or fuse
can result in a tripped breaker, blown fuse, or damage to existing wiring. This
could lead to heat generation or re.
•THIS UNIT MUST BE GROUNDED. Failure to properly ground this unit could
result in death or serious injury.
•Thisunitshouldbedisassembledorrepairedonlybyqualiedservice
personnel to reduce the risk of electric shock, injury, or re.
•Donotmakeanyalterationstotheunit.Alterationscouldresultinelectric
shock, injury, re, or damage to the unit.

7
I. Specications
A. Icemaker
1a. KM-901MAH (air-cooled) Auxiliary Code T-0, U-0
Note: We reserve the right to make changes in specications and design without prior
notice.
AC SUPPLY VOLTAGE 208-230/60/1 (3 wire with netrual for 115V)
AMPERAGE 11.4 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 *874 (396) 832 (378) 785 (356)
Reference without *marks 80 842 (382) 778 (353) 736 (334)
90 832 (378) *732 (332) 687 (312)
100 826 (375) 721 (327) 646 (293)
SHAPE OF ICE Crescent Cube
ICE PRODUCTION PER CYCLE 13.6 lbs. (6.2 kg) 720pcs.
APPROXIMATE STORAGE CAPACITY N/A
ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F
ELECTRIC W (kWH/100 lbs.) 1710(5.6) 1600(4.4)
WATER gal./24HR (gal./100 lbs.) 143(19.6) 240(27.5)
EXTERIOR DIMENSIONS (WxDxH) 30" x 27-3/8" x 37-7/16" (762 x 695 x 950 mm)
EXTERIOR FINISH Stainless Steel, Galvanized Steel (Rear)
WEIGHT Net 196 lbs. (89 kg), Shipping 256 lbs. (116 kg)
CONNECTIONS - ELECTRIC Permanent - Connection
- WATER SUPPLY Inlet 1/2" FPT
- DRAIN Outlet 3/4" 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 N/A
BIN CONTROL SYSTEM Thermostat
COMPRESSOR Hermetic, Model CS12K6E-PFV-237
CONDENSER Air-Cooled , Fin and tube type
EVAPORATOR Vertical type, Stainless Steel and Copper
REFRIGERANT CONTROL Thermostatic Expansion Valve
REFRIGERANT CHARGE R404A, 2 lb. 15 oz. (1320g)
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
ENG.F-011.1.0205

8
1b. KM-901MAH (air-cooled) Auxiliary Code U-1 and Later
AC SUPPLY VOLTAGE 208-230/60/1 (3 wire with netrual for 115V)
AMPERAGE 11.4 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 *874 (396) 832 (378) 785 (356)
Reference without *marks 80 842 (382) 778 (353) 736 (334)
90 832 (378) *732 (332) 687 (312)
100 826 (375) 721 (327) 646 (293)
SHAPE OF ICE Crescent Cube
ICE PRODUCTION PER CYCLE 13.6 lbs. (6.2 kg) 720pcs.
APPROXIMATE STORAGE CAPACITY N/A
ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F
ELECTRIC W (kWH/100 lbs.) 1710(5.6) 1600(4.4)
WATER gal./24HR (gal./100 lbs.) 143(19.6) 240(27.5)
EXTERIOR DIMENSIONS (WxDxH) 30" x 27-3/8" x 37-7/16" (762 x 695 x 950 mm)
EXTERIOR FINISH Stainless Steel, Galvanized Steel (Rear)
WEIGHT Net 196 lbs. (89 kg), Shipping 256 lbs. (116 kg)
CONNECTIONS - ELECTRIC Permanent - Connection
- WATER SUPPLY Inlet 1/2" FPT
- DRAIN Outlet 3/4" 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 N/A
BIN CONTROL SYSTEM Mechanical Switch
COMPRESSOR Hermetic, Model CS12K6E-PFV-237
CONDENSER Air-Cooled , Fin and tube type
EVAPORATOR Vertical type, Stainless Steel and Copper
REFRIGERANT CONTROL Thermostatic Expansion Valve
REFRIGERANT CHARGE R404A, 2 lb. 15 oz. (1320g)
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
ENG.F-011.1.0205
Note: We reserve the right to make changes in specications and design without prior
notice.

9
2a. KM-901MWH (water-cooled) Auxiliary Code T-0, U-0
Note: We reserve the right to make changes in specications and design without prior
notice.
AC SUPPLY VOLTAGE 208-230/60/1 (3 wire with netrual for 115V)
AMPERAGE 8.7A ( 5 Min. Freeze AT 104°F / WT 80°F)
MINIMUM CIRCUIT AMPACITY 15 A
MAXIMUM FUSE SIZE 15 A
APPROXIMATE ICE PRODUCTION Ambient WATER TEMP. (°F)
PER 24 HR. Temp.(°F) 50 70 90
lbs./day ( kg/day ) 70 *912 (414) 889 (403) 849 (385)
Reference without *marks 80 895 (406) 860 (390) 815 (370)
90 889 (403) *835 (379) 791 (359)
100 878 (398) 825 (374) 751 (341)
SHAPE OF ICE Crescent Cube
ICE PRODUCTION PER CYCLE 13.4 lbs. (6.1 kg) 720pcs.
APPROXIMATE STORAGE CAPACITY N/A
ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F
ELECTRIC W (kWH/100 lbs.) 1570(4.5) 1480(3.9)
WATER gal./24HR (gal./100 lbs.) 182(21.8) 245(26.9)
WATER COOLED CONDENSER 1162(139) 631(69)
gal./24HR (gal./100 lbs.)
EXTERIOR DIMENSIONS (WxDxH) 30" x 27-3/8" x 37-7/16" (762 x 695 x 950 mm)
EXTERIOR FINISH Stainless Steel, Galvanized Steel (Rear)
WEIGHT Net 189 lbs. (86 kg), Shipping 249 lbs. (113 kg)
CONNECTIONS - ELECTRIC Permanent - Connection
- WATER SUPPLY Inlet 1/2" FPT Cond. Inlet 1/2" FPT
- DRAIN Outlet 3/4" FPT Cond. Outlet 3/8" FPT
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 CS12K6E-PFV-237
CONDENSER Water-cooled, Tube in tube type
EVAPORATOR Vertical type, Stainless Steel and Copper
REFRIGERANT CONTROL Thermostatic Expansion Valve
REFRIGERANT CHARGE R404A, 1 lb. 15.4 oz. (890g)
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
ENG.F-011.1.0205

10
2b. KM-901MWH (water-cooled) Auxiliary Code U-1 and Later
AC SUPPLY VOLTAGE 208-230/60/1 (3 wire with netrual for 115V)
AMPERAGE 8.7A ( 5 Min. Freeze AT 104°F / WT 80°F)
MINIMUM CIRCUIT AMPACITY 15 A
MAXIMUM FUSE SIZE 15 A
APPROXIMATE ICE PRODUCTION Ambient WATER TEMP. (°F)
PER 24 HR. Temp.(°F) 50 70 90
lbs./day ( kg/day ) 70 *912 (414) 889 (403) 849 (385)
Reference without *marks 80 895 (406) 860 (390) 815 (370)
90 889 (403) *835 (379) 791 (359)
100 878 (398) 825 (374) 751 (341)
SHAPE OF ICE Crescent Cube
ICE PRODUCTION PER CYCLE 13.4 lbs. (6.1 kg) 720pcs.
APPROXIMATE STORAGE CAPACITY N/A
ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F
ELECTRIC W (kWH/100 lbs.) 1570(4.5) 1480(3.9)
WATER gal./24HR (gal./100 lbs.) 182(21.8) 245(26.9)
WATER COOLED CONDENSER 1162(139) 631(69)
gal./24HR (gal./100 lbs.)
EXTERIOR DIMENSIONS (WxDxH) 30" x 27-3/8" x 37-7/16" (762 x 695 x 950 mm)
EXTERIOR FINISH Stainless Steel, Galvanized Steel (Rear)
WEIGHT Net 189 lbs. (86 kg), Shipping 249 lbs. (113 kg)
CONNECTIONS - ELECTRIC Permanent - Connection
- WATER SUPPLY Inlet 1/2" FPT Cond. Inlet 1/2" FPT
- DRAIN Outlet 3/4" FPT Cond. Outlet 3/8" FPT
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 Mechanical Switch
COMPRESSOR Hermetic, Model CS12K6E-PFV-237
CONDENSER Water-cooled, Tube in tube type
EVAPORATOR Vertical type, Stainless Steel and Copper
REFRIGERANT CONTROL Thermostatic Expansion Valve
REFRIGERANT CHARGE R404A, 1 lb. 15.4 oz. (890g)
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
ENG.F-011.1.0205
Note: We reserve the right to make changes in specications and design without prior
notice.

11
3a. KM-901MRH (remote air-cooled) Auxiliary Code T-0, U-0
Note: We reserve the right to make changes in specications and design without prior
notice.
AC SUPPLY VOLTAGE 208-230/60/1 (3 wire with netrual for 115V)
AMPERAGE 11.6A ( 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 *889 (403) 859 (389) 803 (364)
Reference without *marks 80 866 (393) 818 (371) 755 (343)
90 859 (389) *785 (356) 724 (328)
100 843 (382) 771 (350) 668 (303)
SHAPE OF ICE Crescent Cube
ICE PRODUCTION PER CYCLE 13.5 lbs. (6.1 kg) 720pcs.
APPROXIMATE STORAGE CAPACITY N/A
ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F
ELECTRIC W (kWH/100 lbs.) 1770(5.4) 1590(4.3)
WATER gal./24HR (gal./100 lbs.) 152(19.3) 246(27.7)
EXTERIOR DIMENSIONS (WxDxH) 30" x 27-3/8" x 37-7/16" (762 x 695 x 950 mm)
EXTERIOR FINISH Stainless Steel, Galvanized Steel (Rear)
WEIGHT Net 189 lbs. (86 kg), Shipping 249 lbs. (113 kg)
CONNECTIONS - ELECTRIC Permanent - Connection
- WATER SUPPLY Inlet 1/2" FPT
- DRAIN Outlet 3/4" 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 N/A
BIN CONTROL SYSTEM Thermostat
COMPRESSOR Hermetic, Model CS12K6E-PFV-279
CONDENSER Air-Cooled Remote, Condenser Unit URC-9F
EVAPORATOR Vertical type, Stainless Steel and Copper
REFRIGERANT CONTROL Thermostatic Expansion Valve
Condensing Pressure Regulator on URC-9F
REFRIGERANT CHARGE R404A, 9 lbs. 4 oz. (4200g)
(Icemaker 5 lbs. 5 oz. Cond. Unit 3 lbs. 15 oz.)
DESIGN PRESSURE High 467PSIG, Low 230PSIG
P.C. BOARD CIRCUIT PROTECTION High Voltage Cut-out ( Internal )
COMPRESSOR PROTECTION Auto-reset Overload Protector ( Internal )
REFRIGERANT CIRCUIT PROTECTION Auto-reset High Pressure Control Switch
LOW WATER PROTECTION Float Switch
ACCESSORIES -SUPPLIED N/A
-REQUIRED Ice Storage Bin, Remote Condenser Unit
OPERATING CONDITIONS VOLTAGE RANGE 187 - 253 V
AMBIENT TEMP. 45 -100° F
WATER SUPPLY TEMP. 45 - 90° F
WATER SUPPLY PRESSURE 10 - 113 PSIG
ENG.F-011.1.0205

12
3b. KM-901MRH (remote air-cooled) Auxiliary Code U-1 and Later
AC SUPPLY VOLTAGE 208-230/60/1 (3 wire with netrual for 115V)
AMPERAGE 11.6A ( 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 *889 (403) 859 (389) 803 (364)
Reference without *marks 80 866 (393) 818 (371) 755 (343)
90 859 (389) *785 (356) 724 (328)
100 843 (382) 771 (350) 668 (303)
SHAPE OF ICE Crescent Cube
ICE PRODUCTION PER CYCLE 13.5 lbs. (6.1 kg) 720pcs.
APPROXIMATE STORAGE CAPACITY N/A
ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F
ELECTRIC W (kWH/100 lbs.) 1770(5.4) 1590(4.3)
WATER gal./24HR (gal./100 lbs.) 152(19.3) 246(27.7)
EXTERIOR DIMENSIONS (WxDxH) 30" x 27-3/8" x 37-7/16" (762 x 695 x 950 mm)
EXTERIOR FINISH Stainless Steel, Galvanized Steel (Rear)
WEIGHT Net 189 lbs. (86 kg), Shipping 249 lbs. (113 kg)
CONNECTIONS - ELECTRIC Permanent - Connection
- WATER SUPPLY Inlet 1/2" FPT
- DRAIN Outlet 3/4" 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 N/A
BIN CONTROL SYSTEM Mechanical Switch
COMPRESSOR Hermetic, Model CS12K6E-PFV-279
CONDENSER Air-Cooled Remote, Condenser Unit URC-9F
EVAPORATOR Vertical type, Stainless Steel and Copper
REFRIGERANT CONTROL Thermostatic Expansion Valve
Condensing Pressure Regulator on URC-9F
REFRIGERANT CHARGE R404A, 9 lbs. 4 oz. (4200g)
(Icemaker 5 lbs. 5 oz. Cond. Unit 3 lbs. 15 oz.)
DESIGN PRESSURE High 467PSIG, Low 230PSIG
P.C. BOARD CIRCUIT PROTECTION High Voltage Cut-out ( Internal )
COMPRESSOR PROTECTION Auto-reset Overload Protector ( Internal )
REFRIGERANT CIRCUIT PROTECTION Auto-reset High Pressure Control Switch
LOW WATER PROTECTION Float Switch
ACCESSORIES -SUPPLIED N/A
-REQUIRED Ice Storage Bin, Remote Condenser Unit
OPERATING CONDITIONS VOLTAGE RANGE 187 - 253 V
AMBIENT TEMP. 45 -100° F
WATER SUPPLY TEMP. 45 - 90° F
WATER SUPPLY PRESSURE 10 - 113 PSIG
ENG.F-011.1.0205
Note: We reserve the right to make changes in specications and design without prior
notice.

13
4a. KM-901MRH3 (remote air-cooled) Auxiliary Code T-0, U-0
Note: We reserve the right to make changes in specications and design without prior
notice.
AC SUPPLY VOLTAGE 208-230/60/3
AMPERAGE 7.0A ( 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 *899 (408) 874 (397) 817 (371)
Reference without *marks 80 880 (399) 842 (382) 772 (350)
90 874 (397) *815 (370) 749 (340)
100 855 (388) 800 (363) 689 (313)
SHAPE OF ICE Crescent Cube
ICE PRODUCTION PER CYCLE 14.2 lbs. (6.4 kg) 720pcs.
APPROXIMATE STORAGE CAPACITY N/A
ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F
ELECTRIC W (kWH/100 lbs.) 1830(5.4) 1670(4.5)
WATER gal./24HR (gal./100 lbs.) 147(18.0) 254(28.2)
EXTERIOR DIMENSIONS (WxDxH) 30" x 27-3/8" x 37-7/16" (762 x 695 x 950 mm)
EXTERIOR FINISH Stainless Steel, Galvanized Steel (Rear)
WEIGHT Net 198 lbs. (90 kg), Shipping 258 lbs. (117 kg)
CONNECTIONS - ELECTRIC Permanent - Connection
- WATER SUPPLY Inlet 1/2" FPT
- DRAIN Outlet 3/4" 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 N/A
BIN CONTROL SYSTEM Thermostat
COMPRESSOR Hermetic, Model CS12K6E-TF5-279
CONDENSER Air-Cooled Remote, Condenser Unit URC-9F
EVAPORATOR Vertical type, Stainless Steel and Copper
REFRIGERANT CONTROL Thermostatic Expansion Valve
Condensing Pressure Regulator on URC-9F
REFRIGERANT CHARGE R404A, 9 lbs. 4 oz. (4200g)
(Icemaker 5 lbs. 5 oz. Cond. Unit 3 lbs. 15 oz.)
DESIGN PRESSURE High 467PSIG, Low 230PSIG
P.C. BOARD CIRCUIT PROTECTION High Voltage Cut-out ( Internal )
COMPRESSOR PROTECTION Auto-reset Overload Protector ( Internal )
REFRIGERANT CIRCUIT PROTECTION Auto-reset High Pressure Control Switch
LOW WATER PROTECTION Float Switch
ACCESSORIES -SUPPLIED N/A
-REQUIRED Ice Storage Bin, Remote Condenser Unit
OPERATING CONDITIONS VOLTAGE RANGE 187 - 253 V
AMBIENT TEMP. 45 -100° F
WATER SUPPLY TEMP. 45 - 90° F
WATER SUPPLY PRESSURE 10 - 113 PSIG
ENG.F-011.1.0205

14
4b. KM-901MRH (remote air-cooled) Auxiliary Code U-1 and Later
AC SUPPLY VOLTAGE 208-230/60/3
AMPERAGE 7.0A ( 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 *899 (408) 874 (397) 817 (371)
Reference without *marks 80 880 (399) 842 (382) 772 (350)
90 874 (397) *815 (370) 749 (340)
100 855 (388) 800 (363) 689 (313)
SHAPE OF ICE Crescent Cube
ICE PRODUCTION PER CYCLE 14.2 lbs. (6.4 kg) 720pcs.
APPROXIMATE STORAGE CAPACITY N/A
ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F
ELECTRIC W (kWH/100 lbs.) 1830(5.4) 1670(4.5)
WATER gal./24HR (gal./100 lbs.) 147(18.0) 254(28.2)
EXTERIOR DIMENSIONS (WxDxH) 30" x 27-3/8" x 37-7/16" (762 x 695 x 950 mm)
EXTERIOR FINISH Stainless Steel, Galvanized Steel (Rear)
WEIGHT Net 198 lbs. (90 kg), Shipping 258 lbs. (117 kg)
CONNECTIONS - ELECTRIC Permanent - Connection
- WATER SUPPLY Inlet 1/2" FPT
- DRAIN Outlet 3/4" 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 N/A
BIN CONTROL SYSTEM Mechanical Switch
COMPRESSOR Hermetic, Model CS12K6E-TF5-279
CONDENSER Air-Cooled Remote, Condenser Unit URC-9F
EVAPORATOR Vertical type, Stainless Steel and Copper
REFRIGERANT CONTROL Thermostatic Expansion Valve
Condensing Pressure Regulator on URC-9F
REFRIGERANT CHARGE R404A, 9 lbs. 4 oz. (4200g)
(Icemaker 5 lbs. 5 oz. Cond. Unit 3 lbs. 15 oz.)
DESIGN PRESSURE High 467PSIG, Low 230PSIG
P.C. BOARD CIRCUIT PROTECTION High Voltage Cut-out ( Internal )
COMPRESSOR PROTECTION Auto-reset Overload Protector ( Internal )
REFRIGERANT CIRCUIT PROTECTION Auto-reset High Pressure Control Switch
LOW WATER PROTECTION Float Switch
ACCESSORIES -SUPPLIED N/A
-REQUIRED Ice Storage Bin, Remote Condenser Unit
OPERATING CONDITIONS VOLTAGE RANGE 187 - 253 V
AMBIENT TEMP. 45 -100° F
WATER SUPPLY TEMP. 45 - 90° F
WATER SUPPLY PRESSURE 10 - 113 PSIG
ENG.F-011.1.0205
Note: We reserve the right to make changes in specications and design without prior
notice.

15
B. Condenser Unit
1. URC-9F
Unit: mm [in.]

16
Specications
MODEL: URC-9F
Note: We reserve the right to make changes in specications and design without prior
notice.
AC SUPPLY VOLTAGE 115/60/1 (Connection to Icemaker)
FAN MOTOR 115 V Total 1.3FLA 65W
EXTERIOR DIMENSIONS (WxDxH) 32-3/16" x 15-11/16" x 21-15/16" (817 x 398 x 558 mm)
DIMENSIONS INCLUDING LEGS (WxDxH) 34-5/16" x 18-1/8" x 36-15/16" (871 x 460 x 938 mm)
EXTERIOR FINISH Galvanized Steel
WEIGHT Net 81 lbs. ( 37 kg ) Shipping 92 lbs. ( 42 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 3 lbs. 14.8 oz. (1780g)
DESIGN PRESSURE High 467 PSIG
OPERATING CONDITIONS VOLTAGE RANGE 104 ~ 127 V
AMBIENT TEMP. -20 ~ 122 °F
ACCESSORIES -SUPPLIED Leg 2 pcs
Hex. Head Bolt w/Washer 8 x 16 8 pcs
Hex. Nut 8 8 pcs

17
II. General Information
A. Construction
1. KM-901MAH (air-cooled)
Thermostatic Bin Control
Auxiliary Code T-0, U-0
Water Supply Inlet
Condenser
Drier
Control Box
Spray Tubes
Control Switch
Water Pump
Float Switch
Compressor
Expansion Valves
Fan Motor
Hot Gas Valve
Thermostatic Bin Control
Bracket & Bulb Holder
Auxiliary Code T-0, U-0
Cleaning Valve Junction Box
Mechanical Bin Control and Bracket
Auxiliary Code U-1 and later

18
2. KM-901MWH (water-cooled)
Water Supply Inlet
Condenser
Drier
Control Box
Spray Tubes
Control Switch
Water Pump
Float Switch
Compressor
Expansion Valves Water Regulating
Valve
Hot Gas Valve
Junction
Box
Cleaning Valve
Thermostatic Bin Control
Auxiliary Code T-0, U-0
Thermostatic Bin Control
Bracket & Bulb Holder
Auxiliary Code T-0, U-0
Mechanical Bin Control and Bracket
Auxiliary Code U-1 and later

19
3. KM-901MRH/3 (remote air-cooled)
Receiver Tank
Water Supply Inlet
Junction Boxes
Drier
Control Box
Spray Tubes
Control Switch
Water Pump
Float Switch
Compressor
Expansion Valves
Hot Gas Valve
Liquid Line Valve
Cleaning Valve
Thermostatic Bin Control
Auxiliary Code T-0, U-0
Thermostatic Bin Control
Bracket & Bulb Holder
Auxiliary Code T-0, U-0
Mechanical Bin Control and Bracket
Auxiliary Code U-1 and later

20
B. Sequence of Operation
1. Sequence Cycles and Shutdown
a) "E" Control Board: Auxiliary Code T-0, U-0
The steps in the sequence are as outlined below. When power is supplied, CB red
"POWER OK" LED comes 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 not, WV remains
energized through additional 1-minute ll cycles until water lls the tank and closes
F/S. This serves as a low water safety to protect PM.
(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 goes off when WV de-energizes. When the harvest timer expires, the harvest
cycle is complete. CB checks the position of F/S and proceeds to the next cycle if it
is closed or calls for a 1-minute ll cycle if it is open. The minimum total time allowed
by CB for a complete harvest cycle is 2 minutes.
(3) Freeze Cycle
LED 1 is on. Comp and FMR remain energized, PM, FM, and LLV energize, HGV
and WV de-energize. For the rst 5 minutes, CB will not accept a signal from F/S.
This minimum 5-minute freeze time is short cycle protection for Comp. At the end of
5 minutes, F/S assumes control. As ice builds on the evaporator, the water level in
the tank lowers. The freeze cycle continues until F/S opens and terminates the cycle.
(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. Comp and FMR remain energized. HGV energizes. WV energizes if S4 dip
switch 3 off and 4 on. LLV and FM de-energize. PM stops for 2 seconds then
reverses, taking water from the bottom of the tank and forcing pressure against the
check valve seat allowing water to go through the check valve and down the drain.
At the same time, water ows through the small tube to power ush F/S. When the
pump-out timer expires, the pump-out is complete.
The rst pump-out occurs after the 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)."