Hoshizaki F-450MAH User Manual

Hoshizaki America, Inc.

Hoshizaki

Modular Flaker

“A Superior Degree

of Reliability”

www.hoshizaki.com

Models F-450MAH(-C)

SERVICE MANUAL

Issued: 8-25-2009

IMPORTANT

Only qualified 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 qualified service technicians in the service and maintenance of the icemaker.

Should the reader have any questions or concerns which have not been satisfactorily addressed, please call, write, or send an e-mail message to the Hoshizaki Technical Support Department for assistance.

HOSHIZAKI AMERICA, INC.

618 Highway 74 South Peachtree City, GA 30269

Attn: Hoshizaki Technical Support Department

Phone: 1-800-233-1940 Technical Support

(770) 487-2331

Fax: 1-800-843-1056

(770) 487-3360

E-mail: techsupport@hoshizaki.com

Web Site: www.hoshizaki.com

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

following information:

• Model Number

• Serial Number

• Complete and detailed explanation of the problem.

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 .................................................................................................................... 4

1. F-450MAH .................................................................................................................... 4

2. F-450MAH-C ................................................................................................................ 5

II. General Information .......................................................................................................... 6

1. Construction .................................................................................................................6

2. Control Box Layout ....................................................................................................... 7

3. Timer Board ..................................................................................................................8

[a] Solid-State Control ................................................................................................ 8

[b] Timer Board ........................................................................................................... 8

[c] Sequence .............................................................................................................. 9

III. Technical Information ..................................................................................................... 12

1. Water Circuit and Refrigeration Circuit........................................................................ 12

2. Wiring Diagram ........................................................................................................... 13

[a] F-450MAH ........................................................................................................... 13

[b] F-450MAH-C ....................................................................................................... 14

3. Sequence of Electrical Circuit .................................................................................... 15

4. Timing Chart ............................................................................................................... 25

5. Performance Data ....................................................................................................... 28

[a] F-450MAH ........................................................................................................... 28

[b] F-450MAH-C ....................................................................................................... 29

IV. Service Diagnosis.......................................................................................................... 30

1. No Ice Production ....................................................................................................... 30

2. Low Ice Production ..................................................................................................... 33

3. Other ........................................................................................................................... 34

V. Removal and Replacement of Components ................................................................... 35

1. Service for Refrigerant Lines ...................................................................................... 35

[a] Refrigerant Recovery........................................................................................... 35

[b] Evacuation and Recharge [R-404A] .................................................................... 35

2. Brazing ....................................................................................................................... 36

3. Removal and Replacement of Compressor ................................................................ 37

4. Removal and Replacement of Drier ........................................................................... 38

5. Removal and Replacement of Expansion Valve......................................................... 39

6. Removal and Replacement of Evaporator Assembly ................................................ 40

7. Removal and Replacement of Fan Motor ................................................................... 42

8. Removal and Replacement of Control Water Valve .................................................... 42

9. Removal and Replacement of Flush Water Valve ....................................................... 43

VI. Cleaning and Maintenance ........................................................................................... 44

1. Preparing the Icemaker for Long Storage ................................................................... 44

2. Cleaning and Sanitizing Instructions .......................................................................... 45

[a] Cleaning Solution ................................................................................................ 45

[b] Cleaning Procedure ............................................................................................ 46

[c] Sanitizing Solution............................................................................................... 47

[d] Sanitizing Procedure - Initial................................................................................ 47

[e] Sanitizing Procedure - Final ................................................................................ 48

3. Maintenance Instructions ............................................................................................ 50

I. Specifications

1. F-450MAH

AC SUPPLY VOLTAGE 115/60/1 COMPRESSOR 120 V 8.5 RLA 51 LRA GEAR MOTOR 120 V 1.6 FLA 1/6 HP FAN MOTOR 115 V 0.85FLA 50W OTHER 120 V 0.03A MAXIMUM FUSE SIZE 20 A MAX. HACR BREAKER (USA ONLY) 20 A MAX. CIRC. BREAKER (CANADA ONLY) 20 A MINIMUM CIRCUIT AMPACITY 20 A APPROXIMATE ICE PRODUCTION Ambient WATER TEMP. (°F) PER 24 HR. Temp.(°F) 50 70 90 lbs./day ( kg/day ) 70 *476 (216) 456 (207) 435 (197) Reference without *marks 80 416 (189) 397 (180) 379 (172)

90 362 (164) *355 (161) 330 (150)

100 315 (143) 301 (137) *282 (128) SHAPE OF ICE Flake ICE QUALITY Approx. 70%, Ice (90/70°F, Conductivity 200 µs/cm) APPROXIMATE STORAGE CAPACITY N/A ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 915 (6.2) 858 (4.3) POTABLE WATER 43 (12) 57 (12) gal./24HR (gal./100 lbs.) EXTERIOR DIMENSIONS (WxDxH) 21"-7/8" x 27-3/8" x 21-61/64" (556 x 696 x 557.7mm) EXTERIOR FINISH Stainless Steel, Galvanized Steel (Rear) WEIGHT Net 150 lbs. ( 68 kg ), Shipping 175 lbs. ( 80 kg ) CONNECTIONS - ELECTRIC Permanent - Connection

- WATER SUPPLY Inlet 1/2" FPT

- DRAIN Outlet 3/4" FPT ICE MAKING SYSTEM Auger type HARVESTING SYSTEM Direct Driven Auger ( 1/6 HP Gear Motor ) ICE MAKING WATER CONTROL Float Switch COOLING WATER CONTROL N/A BIN CONTROL SYSTEM Mechanical Bin Control ( Proximity Sw. ) COMPRESSOR Hermetic, Model RS43C1E-CAA-219 CONDENSER Air-cooled, Fin and tube type EVAPORATOR Copper Tube on Cylinder REFRIGERANT CONTROL Thermostatic Expansion Valve REFRIGERANT CHARGE R-404A, 1 lb. (455 g) DESIGN PRESSURE High 427 PSIG, Low 230 PSIG P.C. BOARD CIRCUIT PROTECTION High Voltage Cut-off Relay COMPRESSOR PROTECTION Internal Protector GEAR MOTOR PROTECTION Manual reset Circuit Breaker or Fuse REFRIGERANT CIRCUIT PROTECTION Auto-reset High Pressure Control Switch LOW WATER PROTECTION Float Switch and Timer ACCESSORIES - REQUIRED Ice Storage Bin OPERATING CONDITIONS VOLTAGE RANGE 104 - 127 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.

2. F-450MAH-C

AC SUPPLY VOLTAGE 115/60/1 COMPRESSOR 120 V 8.5 RLA 51 LRA GEAR MOTOR 120 V 1.6 FLA 1/6 HP FAN MOTOR 115 V 0.85FLA 50W OTHER 120 V 0.03A MAXIMUM FUSE SIZE 20 A MAX. HACR BREAKER (USA ONLY) 20 A MAX. CIRC. BREAKER (CANADA ONLY) 20 A MINIMUM CIRCUIT AMPACITY 20 A APPROXIMATE ICE PRODUCTION Ambient WATER TEMP. (°F) PER 24 HR. Temp.(°F) 50 70 90 lbs./day ( kg/day ) 70 *426 (193) 407 (185) 387 (176) Reference without *marks 80 368 (167) 350 (159) 333 (151)

90 317 (144) *310 (141) 287 (130)

100 273 (124) 260 (118) *244 (111) SHAPE OF ICE Cubelet ICE QUALITY Approx. 80%, Ice (90/70°F, Conductivity 200 µs/cm) APPROXIMATE STORAGE CAPACITY N/A ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 956 (7.4) 880 (5.0) POTABLE WATER 37 (12) 51 (12) gal./24HR (gal./100 lbs.) EXTERIOR DIMENSIONS (WxDxH) 21"-7/8" x 27-3/8" x 21-61/64" (556 x 696 x 557.7mm) EXTERIOR FINISH Stainless Steel, Galvanized Steel (Rear) WEIGHT Net 150 lbs. ( 68 kg ), Shipping 175 lbs. ( 80 kg ) CONNECTIONS - ELECTRIC Permanent - Connection

- WATER SUPPLY Inlet 1/2" FPT

- DRAIN Outlet 3/4" FPT ICE MAKING SYSTEM Auger type HARVESTING SYSTEM Direct Driven Auger ( 1/6 HP Gear Motor ) ICE MAKING WATER CONTROL Float Switch COOLING WATER CONTROL N/A BIN CONTROL SYSTEM Infrared Sensor COMPRESSOR Hermetic, Model RS43C1E-CAA-219 CONDENSER Air-cooled, Fin and tube type EVAPORATOR Copper Tube on Cylinder REFRIGERANT CONTROL Thermostatic Expansion Valve REFRIGERANT CHARGE R-404A, 1 lb. (455 g) DESIGN PRESSURE High 427 PSIG, Low 230 PSIG P.C. BOARD CIRCUIT PROTECTION High Voltage Cut-off Relay COMPRESSOR PROTECTION Internal Protector GEAR MOTOR PROTECTION Manual reset Circuit Breaker or Fuse REFRIGERANT CIRCUIT PROTECTION Auto-reset High Pressure Control Switch LOW WATER PROTECTION Float Switch and Timer ACCESSORIES - REQUIRED Ice Storage Bin OPERATING CONDITIONS VOLTAGE RANGE 104 - 127 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.

II. General Information

1. Construction

Control Water Valve

Water Supply Inlet

Bin Control

Ice Chute

Evaporator

Flush Water Valve

Control Box

Gear Motor

Junction Box

Condenser

Fan Motor

Compressor

Drier

2. Control Box Layout

Note: The above component names are identical with the wiring label, but not with

the parts list.

3. Timer Board

[a] Solid-State Control

1) A HOSHIZAKI exclusive solid-state control is employed in the self-contained flaker icemakers.

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

3) All models are pre-tested and factory-adjusted.

[b] Timer Board

CAUTION

1. Fragile, handle very carefully.

2. A timer board contains CMOS (Complementary Metal-Oxide Semiconductor) integrated circuits, which are susceptible to failure due to static discharge. It is especially important to use an anti-static wrist strap 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. Especially, never misconnect terminals.

5. Do not fix the electronic devices or parts on the board in the field. Always replace the whole board assembly when it goes bad.

The icemaker is controlled by the timer board for the following purposes:

1) To prevent the gear motor and the compressor from starting or stopping simultaneously.

2) To reduce remaining ice in the refrigeration casing.

3) To protect the unit in case of low water and low water pressure.

4) To protect the unit in case the bin control causes chattering.

[c] Sequence

Fig. 1

Fig. 2

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LEDOM10C441AA2H

GNITARzH06/05CAV42

1T.ces51±06 2T.ces22±09 3T.ces54±051 4Tsselro.ces1 5T%07±.ces7.6 6T%07±.ces7.6

Fig. 3

Functions of Terminals

1) Terminals 1, 2 Power supply AC 24V.

2) Terminals 3, 4 Control X1 (GM) and X2 (CM) Relays. When closed, energize X1 (GM) in 1 sec. and X2 (CM) in 60 sec. When opened, de-energize X

1 (GM) in 150 sec. and X2 (CM) in 90 sec.

3) Terminals 5, 6 Control X

1 (GM) and X2 (CM) Relays.

When opened, de-energize X1 (GM) and X2 (CM) immediately. When closed again, energize X1 (GM) in 1 sec. and X2 (CM) in 60 sec.

4) Terminals 7, 8, 9 X1 (GM) contacts. 8 is a movable contact, 7 is a make contact, and 9 is a break contact.

5) Terminals 10, 11 Control X2 (CM) Relays. When opened, de-energize X2 (CM) immediately. When closed, energize X2 (CM) immediately.

Note: 1. X2 Relay is a single pole, normally open relay, and its terminals are mounted

on the relay itself.

2. The above operation times are median. See Fig. 3 for details.

III. Technical Information

1. Water Circuit and Refrigeration Circuit

2. Wiring Diagram

[a] F-450MAH

[b] F-450MAH-C

3. Sequence of Electrical Circuit

[a] When power switch is moved to “ON” position and flush switch to “ICE” position,

water starts to be supplied to reservoir.

[b] When reservoir has been filled, gear motor starts immediately.

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