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Hoshizaki America, Inc.
Hoshizaki
Modular Flaker
Models
F-450MAH(-C)
SERVICE MANUAL
“A Superior Degree
of Reliability”
www.hoshizaki.com
®
Number: 73112
Issued: 8-21-2009
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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
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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 .................................................
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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 36
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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 (14
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II. General Information 1. Construction Water Supply Control Water Valve Inlet Bin Control Junction Box Ice Chute Condenser Evaporator Fan Motor Flush Water Valve Compressor Control Box Drier Gear Motor 6
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2. Control Box Layout Note: The above component names are identical with the wiring label, but not with the parts list. 7
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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 Semicon- ductor) integrated circuits, which are susceptible to failure due to static
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Fig. 1 [c] Sequence Fig. 2 9
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P1 ART CODE 437305-0 M1 ODEL H2AA144C0 Rz ATING 24 VAC 50/60H T. 1 60±15 sec T. 2 90±22 sec T. 3 150±45 sec Ts 4 1 sec. or les T% 5 6.7 sec. ± 70 T% 6 6.7 sec. ± 70 Fig. 3 10
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Functions of Terminals 1) Terminals 1, 2 Power supply AC 24V. 2) Terminals 3, 4 1 (GM) and X2 (CM) Relays. Control X When closed, energize X1 (GM) in 1 sec. and X2 (CM) in 60 sec. When opened, de-energize X1 (GM) in 150 sec. and X2 (CM) in 90 sec. 3) Terminals 5, 6 Control X1 (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 m
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III. Technical Information 1. Water Circuit and Refrigeration Circuit 12
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2. Wiring Diagram [a] F-450MAH 13
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[b] F-450MAH-C 14
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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. 15
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[b] When reservoir has been filled, gear motor starts immediately. 16
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[c] Compressor starts about 60 sec. after gear motor starts. 17
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[d] Bin control operates, and about 6 sec. later, compressor and gear motor stop simultaneously. 18
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[e] Low water (except water-cooled model). 19
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[f] When flush switch is moved to “FLUSH” position, flush water valve opens and flushes reservoir and evaporator. 20
