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Hoshizaki America, Inc.
Hoshizaki
Modular Crescent Cuber
Models
KM-650MAH
KM-650MWH
KM-650MRH
SERVICE MANUAL
“A Superior Degree
of Reliability”
www.hoshizaki.com
™
Number: 73147
Issued: 12-12-2006
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IMPORTANT Only qualified service technicians should attempt to service or maintain this unit. No such 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 unit. 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 Tech
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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 ...................................................................................................................... 5 A. Icemaker ............................................
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III. Technical Information ...................................................................................................... 3 A. Water Circuit and Refrigeration Circuit ........................................................................ 3 . KM-650MAH (air-cooled) ....................................................................................... 3 . KM-650MWH (water-cooled) ................................................................................. 4 3. KM-650MRH (
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I. Specifications A. Icemaker SPECIFICATION NO. 06A019 ISSUED: 10/10/2006 ITEM: HOSHIZAKI MODULAR CRESCENT CUBER 1. KM-650MAH (air-cooled) MODEL: KM-650MAH AC SUPPLY VOLTAGE 208-230/60/1 (3 wire with neutral for 115V) AMPERAGE 6.6 A ( 5 Min. Freeze AT 104°F / WT 80°F) MINIMUM CIRCUIT AMPACITY 15 A MAXIMUM FUSE SIZE 15 A APPROXIMATE ICE PRODUCTION Ambient WATER TEMP. (°F) PER 24 HR. Temp.(°F) 50 70 90 lbs./day ( kg/day ) 70 *589 (267) 566 (257) 526 (238) Reference without *marks 80
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SPECIFICATION NO. 06A020 ISSUED: 10/10/2006 ITEM 2. KM-650MWH (water : HOSHIZAKI MODULAR CRESCENT CUBER -cooled) MODEL: KM-650MWH AC SUPPLY VOLTAGE 208-230/60/1 (3 wire with neutral for 115V) AMPERAGE 5.3 A ( 5 Min. Freeze AT 104°F / WT 80°F) MINIMUM CIRCUIT AMPACITY 15 A MAXIMUM FUSE SIZE 15 A APPROXIMATE ICE PRODUCTION Ambient WATER TEMP. (°F) PER 24 HR. Temp.(°F) 50 70 90 lbs./day ( kg/day ) 70 *680 (308) 675 (306) 626 (284) Reference without *marks 80 676 (307) 668 (303) 595 (
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SPECIFICATION DATA NO. 06A021 ISSUED: 10/10/2006 ITEM: HOSHIZAKI MODULAR CRESCENT CUBER 3. KM-650MRH (remote air-cooled) MODEL: KM-650MRH AC SUPPLY VOLTAGE 208-230/60/1 (3 wire with neutral for 115V) AMPERAGE 7.1 A ( 5 Min. Freeze AT 104°F / WT 80°F) MINIMUM CIRCUIT AMPACITY 15 A MAXIMUM FUSE SIZE 15 A APPROXIMATE ICE PRODUCTION Ambient WATER TEMP. (°F) PER 24 HR. Temp.(°F) 50 70 90 lbs./day ( kg/day ) 70 *615 (279) 597 (271) 556 (252) Reference without *marks 80 601 (273) 574 (26
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B. Condensing Unit 1. URC-5F 4" (60 mm.) 3-/3 " (585 mm.) 9-/6" 6/6" x 3/4" ( 0 mm. x 0 mm.) (500 mm.) 4 x (SLOTTED HOLES) 8-/8" (460 mm.) 0-5/3" (50 mm.) -5/6" (557 mm.) 7/8" DIA. HOLE (3 mm. DIA.) 6-5/6" (60 mm.) - 5/ 6" (75 mm.) 8 8-/8" (460 mm.) 4-5/6" 7-7/8" 7-/8" (380 mm.) (454 mm.) (435 mm.) 4-9/6" -/" (370 mm.) (63 mm.) 4-/8" (358 mm.) 4-5/6" (380 mm.) 5-/6" (398 mm.)
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SPECIFICATION NO. 06A022 ISSUED: 10/12/2006 ITEM: HOSHIZAKI REMOTE CONDENSER UNIT Specifications MODEL URC-5F BEGINNING SERIAL NO. ________________ MODEL: URC-5F ENDING SERIAL NO. ___________________ AC SUPPLY VOLTAGE 115/60/1 (Connection to Icemaker) FAN MOTOR 115 V Total 1.3FLA 65W EXTERIOR DIMENSIONS (WxDxH) 21-15/16" x 15-11/16" x 17-7/8" (557 x 398 x 454 mm) DIMENSIONS INCLUDING LEGS (WxDxH) 24" x 18-1/8" x 32-13/16" (610 x 460 x 834 mm) EXTERIOR FINISH Galvanized Steel WEIGHT Net 61
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II. General Information A. Construction 1. KM-650MAH (air-cooled) Spray Tubes Water Supply Inlet Condenser Control Box Control Switch Bin Control Thermostat Fan Motor Expansion Valve Hot Gas Valve Float Switch Drier Compressor Water Pump 0
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2. KM-650MWH (water-cooled) Spray Tubes Water Supply Inlet Water Regulator Valve Control Switch Bin Control Thermostat Control Box Expansion Valve Condenser Float Switch Water Pump Drier Hot Gas Valve Compressor
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3. KM-650MRH (remote air-cooled) Spray Tubes Water Supply Inlet Junction Box Control Box Control Switch Bin Control Thermostat Receiver Tank Hot Gas Valve Expansion Valve Drier Float Switch Compressor Water Pump Liquid Line Valve
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B. Sequence of Operation The steps in the sequence are as outlined below. When power is supplied, a 5 second delay occurs at startup. Note that the order of the LEDs from the outer edge of the board is , 4, 3, . 1. One Minute Fill Cycle LED 4 is on. WV opens and the fill period begins. After min ute, the board checks for a closed F/S. If F/S is closed, the harvest cycle begins. If not, WV will remain energized through additional minute cycles until water enters the sump and F/S closes
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4 KM-650MAH, KM-650MWH, KM-650MRH Sequence Flow Chart and Component Operation 2. Harvest Cycle 3. Freeze Cycle Cycle Steps 1. One Minute • Maximum inlet water valve time: 6 minutes • Minimum freeze time: 5 minutes 4. Pump-Out • Maximum harvest time: 0 minutes • Maximum freeze time: freeze timer setting Fill Cycle Cycle Thermistor in to 3 minute timer 5 minute timer F/S in in control control in control control Initial startup always begins here F/S closed F/S closed F/S Chec
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C. Control Board • A HOSHIZAKI exclusive solid-state control is employed in KM-650MAH, KM-650MWH and KM-650MRH Modular Crescent Cubers. • All models are pretested and factory-adjusted. CAUTION . Fragile, handle very carefully. . A control 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 ba
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1. Control Board Layout Control Products "E" Control Board Output Test Switch (used to test relays on board) Dip Switch Alarm Reset Switch Backup Freeze Timer LED Connector K3 Harvest Control (thermistor) Backup Harvest Connector K4 Timer LED Open (not connected) Alarm Buzzer Microprocessor Power LED (board revision level (lights when indicated by last power is supplied digits on label) to the board) Relay LEDs (4) Connector K5 (indicate which Float Switch relays are energized Part Num
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2. Features a) Maximum Water Supply Period – 6 minutes Inlet water valve opening, in the harvest cycle, is limited by the harvest timer. The water valve cannot remain open longer than the maximum period. The water valve can close in less than six minutes if the harvest cycle is completed. b) Harvest Backup Timer and Freeze Timer The harvest backup timer shuts down the icemaker if, for two cycles in a row, the harvest cycle takes more than 0 minutes to complete. The control board will signal
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f) 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 OFF. The green LEDs through 4 energize and sequence from initial startup as listed in the table below. Note that the order of the LEDs from the outer edge of the board is , 4, 3, . For more information, see "
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3. Controls and Adjustments a) Default Dip Switch Settings The dip switch is factory-adjusted to the following positions: Dip Switch No. 3 4 5 6 7 8 9 0 KM-650MAH OFF OFF OFF OFF ON ON OFF OFF OFF OFF KM-650MWH OFF OFF OFF OFF ON ON OFF OFF OFF OFF KM-650MRH OFF OFF OFF OFF ON ON OFF OFF ON OFF Freeze Timer (9 & 0) Normally in the OFF position. Pump-Out Frequency Control (5 & 6) Pump-Out Timer (3 & 4) Harvest Timer ( & ) b) Harvest Control – Thermistor A thermistor (semiconductor) is u
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c) Harvest Timer (dip switch 1 & 2) The harvest timer starts counting when the thermistor reads 48°F (9°C) at the evaporator outlet. No adjustment is required under normal use, as the harvest timer is adjusted to the suitable position. However, a setting longer than the factory setting may be advised in cases where the flush provided at harvest needs to be prolonged for extra cleaning. Before changing this setting, call the HOSHIZAKI Technical Support Department at -800-33-940 for recomm
