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NO.: 73082
ISSUED: MAR. 19, 1999
REVISED:
DEC. 15, 2003
HOSHIZAKI
MODULAR CRESCENT CUBER
MODEL
KM-630MAF
KM-630MWF
KM-630MRF
SERVICE MANUAL
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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 fo
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• Please review this manual. It should be read carefully before the icemaker is serviced or maintenance operations 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 PAGE I. SPECIFICATIONS .................................................................................................... 5 1. KM-630MAF (Air-cooled) ..................................
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V. REMOVAL AND REPLACEMENT OF COMPONENTS .......................................... 40 1. SERVICE FOR REFRIGERANT LINES............................................................... 40 [a] REFRIGERANT RECOVERY ........................................................................ 40 [b] EVACUATION AND RECHARGE .................................................................. 40 2. BRAZING .....................................................................................................
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I. SPECIFICATIONS 1. KM-630MAF * We reserve the right to make changes in specifications and design without prior notice. 5
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2. KM-630MWF * We reserve the right to make changes in specifications and design without prior notice. 6
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3. KM-630MRF * We reserve the right to make changes in specifications and design without prior notice. 7
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4. CONDENSER UNIT URC-6F 24" (610 mm.) 23-1/32" (585 mm.) 19-11/16" 6/16" x 3/4" (10 mm. x 20 mm.) (500 mm.) 4 x 2 (SLOTTED HOLES) 18-1/8" (460 mm.) 20-15/32" (520 mm.) 21-15/16" (557 mm.) 7/8" DIA. HOLE (23 mm. DIA.) 6-5/16" (160 mm.) 2-15/16" (75 mm.) 8 18-1/8" (460 mm.) 14-15/16" 17-7/8" 17-1/8" (380 mm.) (454 mm.) (435 mm.) 14-9/16" 2-1/2" (370 mm.) (63 mm.) 14-1/8" (358 mm.) 14-15/16" (380 mm.) 15-11/16" (398 mm.)
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SPECIFICATIONS MODEL: URC-6F EXTERIOR Galvanized Steel DIMENSIONS (W x D x H) 21-15/16" x 15-11/16" x 17-7/8" (557 x 398 x 453.8 mm.) REFRIGERANT CHARGE R404A 1 lb. 14 oz. (850 g) WEIGHT Net 61 lbs. (28 kg) Shipping 68 lbs. (31 kg) CONNECTIONS REFRIGERANT One Shot Couplings (Aeroquip) ELECTRICAL Permanent Connection CONDENSER Air-cooled HEAD PRESSURE CONTROL Condensing Pressure Regulator AMBIENT CONDITION Min. -20°F - Max. +122°F (-29°C to +50°C) Outdoor use 9
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II. GENERAL INFORMATION 1. CONSTRUCTION [a] KM-630MAF Water Supply Spray Tubes Inlet Junction Box Control Box Condenser Control Switch Bin Control Fan Motor Strainer Expansion Valve Compressor Float Switch Drier Water Pump 10
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[b] KM-630MWF 11
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[c] KM-630MRF 12
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2. CONTROLLER BOARD [a] SOLID-STATE CONTROL 1) A HOSHIZAKI exclusive solid-state control is employed in KM-630MAF, KM630MWF, and KM-630MRF Modular 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 dischar
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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. 3) High Temperature Safety - 127 ± 7°F The temperature of the suction line in the refrigerant circuit is limited by the High Tem- perature Safety. D
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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. 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
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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 ener- gized with the control switch OFF or the unit will not start. 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) 16
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[c] SEQUENCE 1st Cycle 1. Unit energized and Control Switch to “ICE” 3. Thermistor reads 48° F. position. Water supply cycle starts. Defrost Timer starts counting. 2. After 1 minute, Defrost cycle starts. IMPORTANT Water Valve opening is limited to 6 minutes. & 4. Defrost Timer stops counting. 5. After the first 5 minutes in freeze cycle. Defrost cycle is completed and freeze cycle Ready to complete freeze cycle when Float starts. Switch circuit opens. IMPORTANT IMPOR
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2nd Cycle and after with pump drain IMPORTANT Freeze cycle time is limited to 60 minutes even if Float Switch does not open. 2. Drain timer stops counting. 1. Float Switch opens and signals to complete Pump drain is completed freeze cycle. Drain timer starts counting. 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. 4. Defrost Timer stops counting. Ready to comp
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2nd Cycle and after with no pump drain IMPORTANT Freeze cycle time is limited to 60 minutes even if Float Switch does not open. 2. Thermistor reads 48° F. 1. Float Switch opens and signals to complete Defrost Timer starts counting. freeze cycle. IMPORTANT Water Valve opening is limited to 6 minutes. & 3. Defrost Timer stops counting. 4. After the first 5 minutes in freeze cycle. Defrost cycle is completed and freeze cycle Ready to complete freeze cycle when Float starts.
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[d] CONTROLS AND ADJUSTMENTS The Dip Switch is factory-adjusted to the following positions: DIP SWITCH NO. 1 2 3 4 5 6 7 8 9 10 KM-630MWF OFF OFF OFF OFF ON ON OFF OFF OFF OFF KM-630MAF, OFF OFF OFF OFF ON ON OFF OFF ON OFF KM-630MRF Switch Nos. 1 and 2: Used for adjustment of the Defrost Timer. The Defrost Timer starts counting when the Thermistor reads a certain temperature at the Evap
