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Hoshizaki America, Inc.
Hoshizaki
Stackable Crescent Cuber
Models
KM-2500SWH3
KM-2500SRH3
SERVICE MANUAL
“A Superior Degree
of Reliability”
www.hoshizaki.com
™
Number: 73164
Issued: 6-10-2010
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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. Sh
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IMPORTANT This manual should be read carefully before the icemaker is serviced or maintenance operations are performed. Only qualified 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 ....................................................................
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D. Bin Control .................................................................................................................. 22 E. Float Switch ................................................................................................................. 22 F. Thermistor .................................................................................................................... 22 G. Control Switch ..................................................................................
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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 e
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I. Specifications A. Icemaker 1. KM-2500SWH3 (water-cooled) AC SUPPLY VOLTAGE 208-230/60/3 AMPERAGE 14.2 A ( 5 Min. Freeze AT 104°F / WT 80°F) MINIMUM CIRCUIT AMPACITY 30 A MAXIMUM FUSE SIZE 30 A APPROXIMATE ICE PRODUCTION Ambient WATER TEMP. (°F) PER 24 HR. Temp.(°F) 50 70 90 lbs./day ( kg/day ) 70 *2408 (1092) 2395 (1087) 2256 (1024) Reference without *marks 80 2398 (1088) 2379 (1079) 2172 (985) 90 2395 (1087) *2365 (1073) 2184 (991) 100 2327 (1055) 2323 (1054) 2018 (915) SHAPE OF IC
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2. KM-2500SRH3 (remote air-cooled) AC SUPPLY VOLTAGE 208-230/60/3 AMPERAGE 17.7 A ( 5 Min. Freeze AT 104°F / WT 80°F) MINIMUM CIRCUIT AMPACITY 30 A MAXIMUM FUSE SIZE 30 A APPROXIMATE ICE PRODUCTION Ambient WATER TEMP. (°F) PER 24 HR. Temp.(°F) 50 70 90 lbs./day ( kg/day ) 70 *2424 (1100) 2373 (1076) 2196 (996) Reference without *marks 80 2385 (1082) 2306 (1046) 2069 (939) 90 2373 (1076) *2250 (1021) 2035 (923) 100 2301 (1044) 2200 (998) 1837 (833) SHAPE OF ICE Crescent Cube ICE PRODUCTI
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B. Condenser Unit 1. URC-23F Note: We reserve the right to make changes in specifications and design without prior notice. 8 Unit: mm (inches)
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SPECIFICATIONS MODEL: URC-23F 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 Fitt
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II. General Information A. Construction 1. KM-2500SWH3 (water-cooled) Spray Tubes Inlet Water Valve Water Supply Inlet Expansion Valves Evaporator Assembly Check Valves (Refrigeration Circuit) Junction Box Hot Gas Valve Strainer Water Regulating Valve Check Valve (water) Control Box Service Valves Condenser Drier Water Pump Float Switch Liquid Line Valve Cleaning Valve Compressor Main Transformer Box Bin Control Thermostat Control Switch Bin Control Bulb Holder Bin Control Thermostat Brack
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2. KM-2500SRH3 (remote air-cooled) Spray Tubes Inlet Water Valve Water Supply Inlet Expansion Valves Evaporator Assembly Check Valves (Refrigeration Circuit) Junction Boxes Hot Gas Valve Strainer Headmaster (C.P.R.) Shut-Off Valve (Factory Use Only) Check Valve (water) Control Box Service Valves Receiver Tank Drier Water Pump Float Switch Liquid Line Valve Cleaning Valve Compressor Main Transformer Box Bin Control Thermostat Control Switch Bin Control Bulb Holder Bin Control Thermostat Brac
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B. Sequence of Operation 1. Sequence Cycles and Shutdown The steps in the sequence are as outlined below. When power is supplied and BC is closed, CB red "POWER OK" LED comes on. There is a 5-second delay before startup. Note that the order of the LEDs from the outer edge of CB is 1, 4, 3, 2. a) 1-Minute Fill Cycle LED 4 is on. WV energizes and the 1-minute fill cycle begins. After 1 minute, CB checks for a closed F/S. If F/S is closed, the harvest cycle begins. If not, WV remains energized
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e) Harvest Cycle Same as the initial harvest cycle. See "II.B.1.b) Initial Harvest Cycle." Note: Unit continues to cycle until BC is satisfied or power is turned off. The unit always restarts at the 1-minute fill cycle. f) Shutdown When ice contacts the thermostatic bulb (BC switch open), BC shuts down the unit within 10 seconds. BC is factory set, and generally no adjustment is required. However, adjustment may be needed in some conditions, particularly at higher altitude locations. CAUTIO
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2. Sequence Flow Chart 14 "E" Control Board Sequence Flow Chart KM-2500SWH3, KM-2500SRH3 4. Pump-Out Cycle 2. Harvest Cycle 3. Freeze Cycle 1. 1-Minute Fill Cycle Steps • Factory set for every • WV time: 6 min. or the length of harvest, • Minimum freeze time: 5 min. Cycle cycle (S4 dip switch whichever is shorter. • Maximum freeze time: freeze timer setting 5 & 6) • Maximum harvest time: 20 min. (S4 dip switch 9 & 10 • Pump motor stops for 2 sec., then reverses for 10/20 sec. (S4 dip Star
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C. Control Board • A Hoshizaki exclusive control board is employed in KM-2500SWH3 and KM-2500SRH3 Stackable Crescent Cubers. • All models are pretested and factory-adjusted. • For a control board check procedure, see "IV.B. Control Board Check." CAUTION 1. The control board is fragile; handle very carefully. 2. The 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 before handling
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1. Control Board Layout "E" Control Board • "ALARM RESET" Button • S4 Dip Switch • "OUTPUT TEST" Button (used to test relays on control board) • "F TIMER" • WHITE K3 Connector Freeze Timer LED Harvest Control (thermistor) • "H TIMER" • RED K4 Connector Harvest Backup Open (not connected) Timer LED • Alarm Buzzer • "Power OK" LED • Microprocessor (red) (lights when (control board power is supplied to revision level the control board) i
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2. Features a) Maximum Water Supply Period – 6 minutes The inlet water valve remains energized during harvest for 6 minutes or the length of harvest whichever is shorter. 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 20 minutes to complete. The control board signals with the "H Timer" LED and 2 beeps every 3 seconds. The freeze timer shuts down the icemaker if, for two cycles in a row, t
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3. LED Lights and Audible Alarm Safeties At startup, a 5-second delay occurs while the control board conducts an internal timer check. A beep occurs when power is turned off. The red LED indicates proper control voltage and remains on unless a control voltage problem occurs. The green LEDs 1 through 4 energize and sequence from startup as listed in the table below. Note that the order of the LEDs from the outer edge of the control board is 1, 4, 3, 2. For more information, see "II.B. Sequen
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4. Controls and Adjustments CAUTION Dip switches are factory set. Failure to maintain factory settings may adversely affect performance and warranty coverage. For more information, contact Hoshizaki Technical Support at 1-800-233-1940. a) Default Dip Switch Settings The dip switches are factory-adjusted to the following positions: S4 Dip Switch S4 Dip Switch No. 1 2 3 4 5 6 7 8 9 10 KM-2500SWH3 OFF OFF OFF OFF OFF OFF OFF OFF OFF ON KM-2500SRH3 OFF OFF OFF OFF OFF OFF OFF OFF OFF ON Freeze Time
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c) Pump-Out Timer (S4 dip switch 3 & 4) When a pump-out is called for, the pump motor stops after the preceding freeze cycle. The pump motor energizes 2 seconds later in the reverse direction, taking water from the bottom of the tank and forcing pressure against the check valve seat allowing water to go through the check valve and down the drain. At the same time, water flows through the small float switch tube to power flush the float switch. The pump motor drains the water tank for the ti
