Hoshizaki KM-1601SRH-3, KM-1601SAH-3, KM-1601SWH-3 User Manual

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

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: [e-mail]

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.

2

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

3

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

4

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.

5

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.

6

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.

7

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.

8

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.

9

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

- 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 specications and design without prior

notice.

10

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

- 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 specications and design without prior

notice.

11

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

- 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-22F
EVAPORATOR Vertical type, Stainless Steel and Copper
REFRIGERANT CONTROL Thermostatic Expansion Valve

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.

12

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

- 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 specications and design without prior

notice.

13

9. KM-1601SRH3 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 208-230/60/3
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

- 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 specications and design without prior

notice.

14

10. KM-1601SRH3 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 208-230/60/3
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

- 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-22F
EVAPORATOR Vertical type, Stainless Steel and Copper
REFRIGERANT CONTROL Thermostatic Expansion Valve

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.

15

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.

16

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.

17

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

18

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)

19

Control Switch

Capacitor Box
(KM-1601SWH)

Transformer Box
(KM-1601SWH3)

Control Box

Drier

Liquid Line Valve
(LLV)

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)

20

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

21

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

22

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)."

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