Hoshizaki Ice Machine KM-1300SRH3 Service Manual

NO:

ISSUED:

73119

Sep. 20, 2004

HOSHIZAKI

STACKABLE CRESCENT CUBER

MODELS

KM-1300SAH
KM-1300SWH
KM-1300SRH
KM-1300SAH3
KM-1300SWH3
KM-1300SRH3

SERVICE MANUAL

IMPORTANT

Only qualified service technicians should attempt to service or maintain this
icemaker. No service or maintenance should be undertaken until the technician
has thoroughly read this Service Manual.

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 or write 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]

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

following information:

• Model Number

• Serial Number

• Complete and detailed explanation of the problem

2

Please review this manual. It should be read carefully before the icemaker is serviced or
maintenance operations are performed. Only qualified service technicians should service and
maintain the icemaker. This manual should be made available to the technician prior to service or
maintenance.

CONTENTS

I. Specifications .................................................................................................................... 5

1. Icemaker ....................................................................................................................... 5

KM-1300SAH ............................................................................................................. 5

KM-1300SWH ............................................................................................................ 6

KM-1300SRH ............................................................................................................. 7

KM-1300SAH3 ........................................................................................................... 8

KM-1300SWH3 .......................................................................................................... 9

KM-1300SRH3 ......................................................................................................... 10

2. Condensing Unit......................................................................................................... 11

URC-12F.................................................................................................................. 11

II. General Information ........................................................................................................ 13

1. Construction ............................................................................................................... 13

[a] KM-1300SAH, KM-1300SAH3 ............................................................................ 13

[b] KM-1300SWH, KM-1300SWH3 .......................................................................... 14

[c] KM-1300SRH, KM-1300SRH3 ............................................................................ 15

2. Controller Board ......................................................................................................... 16

[a] Solid-State Control .............................................................................................. 16

[b] Controller Board .................................................................................................. 16

[c] Sequence ............................................................................................................ 20

[d] Controls and Adjustments ................................................................................... 23

[e] Checking the Controller Board ............................................................................ 26

III. Technical Information ..................................................................................................... 28

1. Water Circuit and Refrigerant Circuit........................................................................... 28

[a] KM-1300SAH, KM-1300SAH3 ............................................................................ 28

[b] KM-1300SWH, KM-1300SWH3 .......................................................................... 29

[c] KM-1300SRH, KM-1300SRH3 ............................................................................ 30

2. Wiring Diagrams ......................................................................................................... 31

[a] KM-1300SAH, KM-1300SWH ............................................................................. 31

[b] KM-1300SRH ...................................................................................................... 32

[c] KM-1300SAH3, KM-1300SWH3.......................................................................... 33

[d] KM-1300SRH3 .................................................................................................... 34

3. Timing Chart ............................................................................................................... 35

4. Performance Data ....................................................................................................... 37

[a] KM-1300SAH ...................................................................................................... 37

[b] KM-1300SWH ..................................................................................................... 38

[c] KM-1300SRH ...................................................................................................... 39

[d] KM-1300SAH3 .................................................................................................... 40

[e] KM-1300SWH3 ................................................................................................... 41

[f] KM-1300SRH3 ..................................................................................................... 42

3

IV. Service Diagnosis .......................................................................................................... 43

1. No Ice Production ....................................................................................................... 43

2. Evaporator is Frozen Up ............................................................................................. 47

3. Low Ice Production ..................................................................................................... 48

4. Abnormal Ice .............................................................................................................. 48

5. Other ........................................................................................................................... 48

V. Removal and Replacement of Components ................................................................... 49

1. Service for Refrigerant Lines ...................................................................................... 49

[a] Refrigerant Recovery........................................................................................... 49

[b] Evacuation and Recharge [R-404A] .................................................................... 49

2. Brazing ....................................................................................................................... 50

3. Removal and Replacement of Compressor ................................................................ 51

4. Removal and Replacement of Drier ........................................................................... 52

5. Removal and Replacement of Expansion Valve......................................................... 53

6. Removal and Replacement of Hot Gas Valve and Line Valve .................................... 54

7. Removal and Replacement of Evaporator .................................................................. 55

8. Removal and Replacement of Water Regulating Valve - Water-Cooled Model Only... 56

9. Adjustment of Water Regulating Valve - Water-Cooled Model Only ............................ 57

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

Remote Air-Cooled Model Only ................................................................................ 58

11. Removal and Replacement of Thermistor ................................................................ 59

12. Removal and Replacement of Fan Motor ................................................................. 60

13. Removal and Replacement of Water Valve............................................................... 61

14. Removal and Replacement of Pump Motor .............................................................. 61

15. Removal and Replacement of Spray Tubes.............................................................. 62

VI. Maintenance and Cleaning Instructions ........................................................................ 63

1. Preparing the Icemaker for Long Storage ................................................................... 63

2. Cleaning and Sanitizing Procedures .......................................................................... 65

[a] Cleaning Procedure ............................................................................................ 66

[b] Sanitizing Procedure - Following Cleaning Procedure ....................................... 68

3. Maintenance ............................................................................................................... 69

4

I. Specifications

1. Icemaker

KM-1300SAH

AC SUPPLY VOLTAGE 208-230/60/1 (3 wire with neutral for 115V)
AMPERAGE 12.6 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 *1283 (582) 1242 (563) 1135 (515)
Reference without *marks 80 1252 (568) 1188 (539) 1053 (478)

90 1242 (563) *1143 (518) 1017 (461)

100 1203 (546) 1114 (505) 902 (409)
SHAPE OF ICE Crescent Cube
ICE PRODUCTION PER CYCLE 30.1 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.) 2334 (4.9) 2180 (0.0)
WATER gal./24HR (gal./100 lbs.) 327 (28.6) 697 (54.3)
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 315 lbs. ( 143 kg )
CONNECTIONS - ELECTRIC Permanent - Connection

- WATER SUPPLY Inlet 1/2" FPT

- DRAIN Outlet 3/4" FPT

- CONDENSATE DRAIN 3/8" OD Pipe
CUBE CONTROL SY STEM 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 SY STEM Thermos t at
COMPRESSOR Hermetic, Model CS14K6E-PFV-237
CONDENSER Air-cooled, Fin and Tube Type
EVAPORATOR Vertical type, Stainless Steel and Copper
REFRIGERANT CONTROL Thermostatic Expansion Valve
REFRIGERANT CHARGE R-404A, 3 lb. 14 oz. ( 1750 g )
DESIGN PRESSURE High 467 PSIG, Low 230 PSIG
P. C. BOARD CIRCUIT PROTECTION High Volt age Cut-out ( Internal )
COMPRESSOR PROTECTION Auto-reset Overload Protector ( Internal )
REFRIGERANT CIRCUIT PROTECTION Auto-reset High Pressure Control Switc h
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

We reserve the right to make changes in specifications and design without prior notice.

5

KM-1300SWH

AC SUPPLY VOLTAGE 208-230/60/1 (3 wire with neutral for 115V)
AMPERAGE 9.7 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 *1284 (582) 1282 (582) 1208 (548)
Reference without *marks 80 1283 (582) 1280 (581) 1166 (529)

90 1282 (582) *1278 (580) 1180 (535)

100 1243 (564) 1255 (569) 1089 (494)
SHAPE OF ICE Crescent Cube
ICE PRODUCTION PER CYCLE 30.1 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.) 2130 (4.0) 2033 (3.8)
POTABLE WATER 282 (22.1) 512 (39.9)
WATER COOLED CONDENSER 920 (72) 668 (52)
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 265 lbs. ( 120 kg ), Shipping 315 lbs. (143 kg)
CONNECTIONS - ELECTRIC Permanent - Connection

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

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

3/8" OD Pipe
CUBE CONTROL SY STEM Float Switch
HARVESTING CONTROL SYSTEM Hot Gas and Water, Thermistor and Timer
ICE MAKING WATER CONTROL Timer Controlled. Overflow Pipe
COOLING WATER CONTROL Water Regulator
BIN CONTROL SY STEM Thermos t at
COMPRESSOR Hermetic, Model CS14K6E-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, 2 lb. 2 oz. ( 950 g )
DESIGN PRESSURE High 427 PSIG, Low 230 PSIG
P. C. BOARD CIRCUIT PROTECTION High Voltage Cut-out ( Internal )
COMPRESSOR PROTECTION Auto-reset Overload Protector ( Internal )
REFRIGERANT CIRCUIT PROTECTION Auto-res et High Pressure Control Switc h
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

We reserve the right to make changes in specifications and design without prior notice.

6

KM-1300SRH

AC SUPPLY VOLTAGE 208-230/60/1 (3 wire with neutral for 115V)
AMPERAGE 14.5 A ( 5 Min. Freeze AT 104°F / WT 80°F)
MINIMUM CIRCUIT AMPACITY 20 A
MAXIMUM FUSE SIZE 20 A
APPROXIMATE ICE PRODUCTION Ambient WATER TEMP. (°F)
PER 24 HR. Temp.(°F) 50 70 90
lbs./day ( kg/day ) 70 *1296 (588) 1257 (570) 1173 (532)
Reference without *marks 80 1266 (574) 1206 (547) 1105 (501)

90 1257 (570) *1163 (528) 1068 (484)

100 1230 (558) 1141 (517) 980 (445)
SHAPE OF ICE Crescent Cube
ICE PRODUCTION PER CYCLE 30.1 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.) 2326 (4.8) 2300 (0.0)
WATER gal./24HR (gal./100 lbs.) 355 (30.5) 772 (59.6)
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 255 lbs. ( 116 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 Pipe
CUBE CONTROL SY STEM 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 SY STEM Thermos t at
COMPRESSOR Hermetic, Model CS14K6E-PFV-279
CONDENSER Air-cooled remote, Condenser Unit URC-12F

recommended
EVAPORATOR Vertical type, Stainless Steel and Copper
REFRIGERANT CONTROL Thermostatic Expansion Valve

Condensing Pressure Regulator on URC-12F
REFRIGERANT CHARGE R-404A, 11 lbs. 7 oz. ( 5200 g )

( Icemaker 7 lbs.; Cond. Unit 4 lbs. 7 oz. )
DESIGN PRESSURE High 467 PSIG, Low 230 PSIG
P. C. BOARD CIRCUIT PROTECTION High Volt age Cut-out ( Internal )
COMPRESSOR PROTECTION Auto-reset Overload Protector ( Internal )
REFRIGERANT CIRCUIT PROTECTION Auto-reset High Pressure Control Swit c h
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

We reserve the right to make changes in specifications and design without prior notice.

7

KM-1300SAH3

AC SUPPLY VOLTAGE 208-230/60/3
AMPERAGE 7.8 A ( 5 Min. Freeze AT 104°F / WT 80°F)
MINIMUM CIRCUIT AMPA CITY 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 *1320 (599) 1265 (574) 1153 (523)
Reference without *marks 80 1278 (580) 1192 (541) 1060 (481)

90 1265 (574) *1132 (513) 1006 (456)

100 1230 (558) 1102 (500) 890 (404)
SHAPE OF ICE Crescent Cube
ICE PRODUCTION PER CYCLE 30.1 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.) 2311 (4.9) 2150 (0.0)
WATER gal./24HR (gal./100 lbs.) 267 (23.6) 632 (47.9)
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 Pipe
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 SY STEM Thermos tat
COMPRESSOR Hermetic, Model CS14K6E-TF5-237
CONDENSER Air-cooled, Fin and Tube Type
EVAPORATOR Vertical type, Stainless Steel and Copper
REFRIGERANT CONTROL Thermostatic Expansion Valve
REFRIGERANT CHARGE R-404A, 3 lb. 14 oz. ( 1750 g )
DESIGN PRESSURE High 467 PSIG, Low 230 PSIG
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

We reserve the right to make changes in specifications and design without prior notice.

8

KM-1300SWH3

AC SUPPLY VOLTAGE 208-230/60/3
AMPERAGE 6.9 A ( 5 Min. Freeze AT 104°F / WT 80°F)
MINIMUM CIRCUIT AMPA CITY 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 *1254 (569) 1264 (573) 1191 (540)
Reference without *marks 80 1261 (572) 1276 (579) 1157 (525)

90 1264 (573) *1287 (584) 1186 (538)

100 1220 (554) 1263 (573) 1093 (496)
SHAPE OF ICE Crescent Cube
ICE PRODUCTION PER CYCLE 30.1 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.) 2091 (3.9) 2090 (4.0)
POTABLE WATER 292 (22.7) 576 (45.9)
WATER COOLED CONDENSER 927 (72) 640 (51)
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 265 lbs. ( 120 kg ), Shipping 315 lbs. (143 kg)
CONNECTIONS - ELECTRIC Permanent - Connection

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

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

3/8" OD Pipe
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 Regulat or
BIN CONTROL SY STEM Thermos tat
COMPRESSOR Hermetic, Model CS14K6E-TF5-237
CONDENSER Water-cooled, Tube in tube type
EVAPORATOR Vertical type, Stainless Steel and Copper
REFRIGERANT CONTROL Thermostatic Ex pansion Valve
REFRIGERANT CHARGE R-404A, 2 lb. 2 oz. ( 950 g )
DESIGN PRESSURE High 427 PSIG, Low 230 PSIG
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

We reserve the right to make changes in specifications and design without prior notice.

9

KM-1300SRH3

AC SUPPLY VOLTAGE 208-230/60/3
AMPERAGE 10.8 A ( 5 Min. Freeze AT 104°F / WT 80°F)
MINIMUM CIRCUIT AMPA CITY 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 *1308 (593) 1296 (588) 1203 (546)
Reference without *marks 80 1299 (589) 1279 (580) 1145 (520)

90 1296 (588) *1266 (574) 1148 (521)

100 1252 (568) 1238 (562) 1039 (471)
SHAPE OF ICE Crescent Cube
ICE PRODUCTION PER CYCLE 30.1 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.) 2321 (4.4) 2270 (4.2)
WATER gal./24HR (gal./100 lbs.) 251 (19.8) 706 (54.0)
EXTERIOR DIMENSIONS (WxDxH) 48" x 27 3/8" x 27 3/8" (1219 x 695 x 695 mm)
EXTERIOR FINISH Stainless Steel, Galvanized Steel (Rear)
WEIGHT Net 255 lbs. ( 116 kg ), Shipping 315 lbs. ( 143 kg )
CONNECTIONS - ELECTRIC Permanent - Connection

- WATER SUPPLY Inlet 1/2" FPT

- DRAIN Outlet 3/4" FPT

- CONDENSATE DRAIN 3/8" OD Pipe
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 SY STEM Thermos tat
COMPRESSOR Hermetic, Model CS14K6E-TF5-279
CONDENSER Air-cooled remote, Condenser Unit URC-12F

recommended
EVAPORATOR Vertical type, Stainless Steel and Copper
REFRIGERANT CONTROL Thermostatic Expansion Valve

Condensing Pressure Regulator on URC-12F
REFRIGERANT CHARGE R-404A, 11 lbs. 7 oz. ( 5200 g )

( Icemaker 7 lbs.; Cond. Unit 4 lbs. 7 oz. )
DESIGN PRESSURE High 467 PSIG, Low 230 PSIG
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

We reserve the right to make changes in specifications and design without prior notice.

10

2. Condensing Unit

URC-12F

11

MODEL: URC-12F

SPECIFICATIONS

EXTERIOR

DIMENSIONS (W x D x H)

REFRIGERANT CHARGE

URC-12F

WEIGHT

CONNECTIONS

REFRIGERANT
ELECTRICAL

CONDENSER

HEAD PRESSURE CONTROL

AMBIENT CONDITION

Galvanized Steel

35 - 11/16” x 15-11/16” x 21-15/16”
(907.2 x 398 x 557.8 mm)

R404A 4 lbs. 7 oz. (2000 g)

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

One Shot Couplings (Aeroquip)
Permanent Connection

Air-cooled

Condensing Pressure Regulator

Min. -20°F - Max. +122°F
(-29°C to +50°C)
Outdoor use

12

II. General Information

1. Construction

[a] KM-1300SAH, KM-1300SAH3

13

[b] KM-1300SWH, KM-1300SWH3

14

[c] KM-1300SRH, KM-1300SRH3

15

2. Controller Board

[a] Solid-State Control

1) A HOSHIZAKI exclusive solid-state control is employed in KM-1300SAH, KM-1300SWH,
KM-1300SRH, KM-1300SAH3, KM-1300SWH3, and KM-1300SRH3 Stackable Crescent
Cubers.

2) A printed circuit board (hereafter called “controller board”) includes a stable and high quality
control system.

3) All models are pretested and factory-adjusted.

[b] Controller Board

CAUTION

1. Fragile, handle very carefully.

2. A controller 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 when
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 when it goes bad.

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

PART NUMBER TYPE

2A1410-01 HOS-001A (Control Products - 10 Pin)

Features of Control Products “E” Controller Board

(1) Maximum Water Supply Period - 6 minutes

Water solenoid valve opening in the defrost (harvest) cycle is limited by the defrost timer. The
water valve cannot remain open longer than the maximum period. The water valve can close in
less than six minutes if the defrost cycle is completed.

(2) Defrost Timer

The defrost cycle starts when the float switch opens and completes the freeze cycle. But the
defrost timer does not start counting until the thermistor senses 48°F at the evaporator outlet.
The period from the end of the freeze cycle up to the point of the thermistor's sensing varies
depending on the ambient and water temperatures.

16

(3) High Temperature Safety - 127 ± 7°F

The temperature of the suction line in the refrigerant circuit is limited by the high temperature
safety. During the defrost cycle the evaporator temperature rises. The thermistor senses 48°F
and starts the defrost timer. After the defrost timer counts down to zero, the normal freeze cycle
begins. If the evaporator temperature continues to rise, the thermistor will sense the rise in
temperature and at 127 ± 7°F the thermistor operates the high temperature safety. This high
temperature safety shuts down the circuit and the icemaker automatically stops. To reset the
safety, turn the power off and back on again. This high temperature safety protects the unit from
excessive temperature. The control board will beep every three seconds. The white reset button
on the control board must be pressed with power on to reset the safety.

(4) Low Water Safety

If the pump motor is operated without water, the mechanical seal can fail. To prevent this type of
failure, the controller 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 defrost cycle.
If the float switch is in the up position (electrical circuit closed), the controller board changes to
the ice making cycle. If the float switch is in the down position (electrical circuit open), the
controller board changes to a one minute water fill cycle before starting the ice making cycle.
This method allows for a low water safety shut down to protect the water pump from mechanical
seal failure. For water-cooled models, if the water is shut off, the unit is protected by the high
pressure switch.

(5) High Voltage Cut-out

The maximum allowable supply voltage of this icemaker is limited by the high voltage cut-out. If
miswiring (especially on single-phase, 3-wire models) causes excessive voltage on the
controller board, the high voltage cut-out shuts down the circuit in 3 seconds and the icemaker
automatically stops. When the proper supply voltage is resumed, the icemaker automatically
starts running again. The control board will signal this problem using 7 beeps every 3 seconds.

6) 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 switch is turned ON or OFF.

17

The green LED’s 1-4 represent the corresponding relays and energize and sequence
5 seconds from initial startup as follows:

Sequence Step LED’s on Length: Min. Max. Avg.

1 Minute Fill Cycle LED4 60 sec.
Harvest Cycle LED1, 4, & 2 2 min. 20 min. 3-5 min. Freeze
Cycle LED1 5 min. 60 min. 30-35 min.
Reverse Pump Out LED1, 3, & 2 10 sec. 20 sec. Factory set.

{LED 1 – Comp; LED 2 - HGV/CFM; LED 3 – PM; LED 4 - WV}

The built in safeties shut down the unit and have alarms as follows:

1 beep every 3 sec. = High Evaporator Temperature >127 ° F.
Check for defrost problem (stuck HGV or relay), hot water entering unit, stuck headmaster, or

shorted thermistor.

2 beeps every 3 sec. = Defrost Back Up Timer. Defrost >20 minutes.
Orange LED marked 20 MIN energizes.
Check for open thermistor, HGV not opening, TXV leaking by, low charge, or inefficient com­pressor.

3 beeps every 3 sec. = Freeze Back Up Timer. Freeze > 60 minutes.
Yellow LED marked 60 MIN energizes.
Check for F/S stuck closed (up), WV leaking by, HGV leaking by, TXV not feeding properly,
low charge, or inefficient compressor.

To manually reset the above safeties, depress white alarm reset button with the power supply
ON.

6 beeps every 3 sec. = Low Voltage. Voltage is 92 Vac or less.

7 beeps every 3 sec. = High Voltage. Control voltage > 147Vac ±5%.

The red LED will de-energize if voltage protection operates.
The voltage safety automatically resets when voltage is corrected.

The Output Test switch “S3” provides a relay sequence test. With power OFF, place S3 ON
and switch power to ICE. The correct lighting sequence should be none, 2, 3, 4, 1, & 4, normal
sequence every 5 seconds. S3 should remain in the “OFF” position for normal operation.

The application switch located between relay X3 & X4 must be set to match the original board
application. Place this switch in the ALP position if there is no white wire supplied to the K1
connector. If there is a white wire, place the switch in the C position. If this switch is placed in
the wrong position either the compressor contactor will remain energized with the control switch
OFF or the unit will not start.

18

The dip switches should be adjusted per the adjustment chart published in the Tech Specs
book. 7 & 8 must remain in the OFF position.

(Control Products HOS-001A Board)

19

[c] Sequence

1st Cycle

1. Unit energized and Control Switch to “ICE”
position. Water supply cycle starts.

2. After 1 minute.
Defrost cycle starts.

3. Thermistor reads 48°F.
Defrost Timer starts counting.

5. After the first 5 minutes in freeze cycle.
Ready to complete freeze cycle when Float
Switch circuit opens.

IMPORTANT

Board never accepts freeze completion signal
within the first 5 minutes in freeze cycle.

IMPORTANT

Water Valve
opening is limited
to 6 minutes.

4. Defrost Timer stops counting.
Defrost cycle is completed and freeze cycle
starts.

IMPORTANT

1. Board never accepts defrost completion signal
within the first 2 minutes in defrost cycle.

2. Defrost cycle time is limited to 20 minutes even
if Defrost Timer does not stop counting.

20

2nd Cycle and after with pump drain

IMPORTANT

Freeze cycle time is limited by the freeze timer
factory setting even if the Float Switch does
not open.

1. Float Switch opens and signals to complete
freeze cycle.
Drain timer starts counting.

&

2. Drain timer stops counting.
Pump drain is completed

3. Thermistor reads 48° F.
Defrost Timer starts
counting.

IMPORTANT

Water Valve
opening is limited to 6
minutes.

5. After the first 5 minutes in freeze cycle.
Ready to complete freeze cycle when Float
Switch circuit opens.

IMPORTANT

Board never accepts freeze completion signal
within the first 5 minutes in freeze cycle.

4. Defrost Timer stops counting.
Defrost cycle is completed and freeze cycle
starts.

IMPORTANT

1. Board never accepts defrost completion
signal within the first 2 minutes in defrost
cycle.

2. Defrost cycle time is limited to 20 minutes
even if Defrost Timer does not stop counting.

21