UNCLASSIFIED TECHNICAL MANUAL. Hoshizaki Cubelet Ice Dispenser Model DCM-270BAH. HOSHIZAKI AMERICA, INC. 618Highway74South Peachtree City, GA 30269

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1 S6161-Z8-FSE-010 UNCLASSIFIED TECHNICAL MANUAL Hoshizaki Cubelet Ice Dispenser Model DCM-270BAH HOSHIZAKI AMERICA, INC. 618Highway74South Peachtree City, GA N C-2100 DISTRIBUTION STATEMENT B: DISTRIBUTION AUTHORIZED TO U.S. GOVERNMENT AGENCIES ONLY. PROPRIETARY INFORMATION: 5 OCTOBER OTHER REQUESTS SHALL BE REFERRED TO COMNAVSEASYSCOM PMS 450. NO SECONDARY DISTRIBUTION AUTHORIZED WITHOUT WRITTEN APPROVAL OF THE APPLICABLE NAVSEA PROGRAM MANAGEMENT OFFICE. WARNING- THIS DOCUMENT CONTAINS TECHNICAL DATA WHOSE EXPORT IS RESTRICTED BY THE ARMS EXPORT CONTROL ACT (TITLE 22, U.S.C., SEC 2751, ET SEQ.) OR THE EXPORT ADMINISTRATION ACT OF 1979, AS AMENDED, (TITLE 50, U.S.C., APP ET SEQ.) VIOLATIONS OF THESE EXPORT LAWS ARE SUBJECT TO SEVERE CRIMINAL PENALTIES. DISSEMINATE PER THE PROVISIONS OF OPNAVINST DESTRUCTION NOTICE- DESTROY BY ANY METHOD THAT WILL PREVENT DISCLOSURE OF CONTENTS OR RECONSTRUCTION OF THE DOCUMENT. PUBLISHED BY DIRECTION OF COMMANDER, NAVAL SEA SYSTEMS COMMAND UNCLASSIFIED 23 October 2006

2 UNCLASSIFIED APPROVAL DATA FOR: S6161-Z8-FSE-010 APPROVAL AND PROCUREMENT RECORD TITLE OF MANUAL: Technical Manual, Hoshizaki Cubelet Ice Dispenser Model DCM-270BAH APPROVAL AUTHORITY: Design Yard, Electric Boat Corporation, as indicated by the NAVSEA Technical Manual Certification Sheet dated October 23, 2006 CONTRACT NUMBER SHIP APPLICABILITY QUANTITY OF MANUALS QUANTITY OF EQUIPMENT BUILDING YARD N C-2100 SSN774 Class * 1 EBCorp, Groton, CT * Quantities distributed in accordance with the VIRGINIA Class Index of Technical Publications (ITP). REMARKS : DATE : 23 October 2006 CERTIFICATION: It is hereby certified that S6161-Z8-FSE-010 to be provided under contract N C-2100 has been approved by the approval data shown above. /s/ D. F. Vetelino, Manager Technical Services GENERAL DYNAMICS/Electric Boat Groton, CT UNCLASSIFIED

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4 UNCLASSIFIED Record of Alterations This manual reflects alterations occurring after 23 October 2006 as a result of accomplishment of the following: CHANGE NO. DEFICIENCY DESCRIPTION UNCLASSIFIED

5 UNCLASSIFIED TABLE OF CONTENTS S6161-Z8-FSE-010 Chapter Page 1 GENERAL INFORMATION SAFETY PRECAUTIONS Warning/Caution/Note Usage Warning/Caution/Note Definitions INTRODUCTION EQUIPMENT DESCRIPTION EQUIPMENT, ACCESSORIES AND DOCUMENTS SUPPLIED EQUIPMENT, ACCESSORIES AND DOCUMENTS REQUIRED BUT NOT SUPPLIED APPENDICES FIELD CHANGES AND FACTORY CHANGES OPERATION INTRODUCTION STARTUP SHUT DOWN FUNCTIONAL DESCRIPTION INTRODUCTION SCHEDULED MAINTENANCE INTRODUCTION TROUBLESHOOTING INTRODUCTION CORRECTIVE MAINTENANCE INTRODUCTION PARTS LIST INTRODUCTION INSTALLATION INTRODUCTION LONG TERM STORAGE Appendix 1 Hoshizaki Cubelet Ice Dispenser Model DCM-270BAH, Instruction Manual Appendix 2 Hoshizaki Cubelet Ice Dispenser Model DCM-270BAH, Service Manual Appendix 3 Hoshizaki Cubelet Ice Dispenser Model DCM-270BAH, Parts List UNCLASSIFIED i

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7 UNCLASSIFIED LIST OF TABLES S6161-Z8-FSE-010 Number Title Page 1-1. Equipment, Accessories,andDocumentsSupplied Appendices Hoshizaki Cubelet Ice Dispenser Model DCM-270BAH Field Changes and Factory Changes Hoshizaki Cubelet Ice Dispenser Model DCM-270BAH Scheduled Maintenance Hoshizaki Cubelet Ice Dispenser Model DCM-270BAH Troubleshooting Casualty Symptoms Hoshizaki Cubelet Ice Dispenser Model DCM-270BAH Corrective Maintenance Procedures UNCLASSIFIED iii

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9 UNCLASSIFIED SAFETY SUMMARY S6161-Z8-FSE-010 GENERAL SAFETY NOTICES The following general safety notices supplement specific warnings and cautions appearing in this manual. General and specific precautions must be understood and applied during use of the Hoshizaki cubelet ice dispenser model DCM-270BAH. Operating personnel must observe safety regulations at all times. The Commanding Officer or other authority will issue orders necessary for situations not covered in these general and specific safety precautions. SAFETY INSTRUCTIONS AND REGULATIONS All electrical components associated with this system equipment shall be installed and grounded according to applicable Navy regulations and approved shipboard practices. All maintenance operations shall comply with Navy Safety Precautions for Forces Afloat, OPNAVINST 5100 series. Precautions for electrical equipment set forth in Naval Ship s Technical Manual (NSTM), Chapters 300, 302, 310, and 320 shall be observed. ENERGIZED EQUIPMENT Do not replace components or make adjustments inside equipment with a high voltage supply turned on. Protect against grounding before making adjustments to electrical equipment. Remove watches, rings, or other items that will conduct electricity. Whenever possible, use only one hand when servicing or adjusting live equipment. Tag-out procedures must be implemented to prevent applying power to equipment when maintenance work is in progress. All circuits not known to be dead must be considered live and dangerous at all times. DO NOT REPAIR OR ADJUST ALONE Do not repair or adjust equipment alone under any circumstances. The immediate presence of someone capable of rendering aid is required. INTERLOCKS Interlocks are provided for safety of personnel and equipment and should be used for the purpose intended. Interlocks should not be battle-shorted or otherwise nullified except by authorized personnel. Do not solely depend upon interlocks for protection. Whenever possible disconnect power at power distribution source. UNAUTHORIZED ALTERATIONS Do not make any unauthorized alterations to equipment or components. TEST EQUIPMENT Make sure test equipment is in good condition. Do not touch live equipment or personnel working on live equipment while holding a test meter. If a test meter must be held, ground the case of the meter before starting measurement. Some types of measuring devices should not be grounded; these devices should not be held when taking measurements. Equipment malfunction may cause high voltages to be present across terminals that are nominally low voltage. Be careful even when measuring low voltages. FIRST AID An injury, no matter how slight, should never go unattended. Always obtain first aid or medical attention immediately. RESUSCITATION Personnel working with or near high voltage shall be familiar with approved resuscitation methods. If someone is injured and stops breathing, initiate resuscitation immediately. A delay could cost the victim s life. Refer to Naval Ship s Technical Manual, Chapter 300. Posters for illustrating the rules for resuscitation by the mouth-to-mouth method may be obtained on request from the Bureau of Medicine. HAZARDOUS MATERIAL HANDLING AND DISPOSAL Observe safety precautions of OPNAVINST 5100 Series. Review requirements for appropriate engineering controls and personnel protective equipment with Industrial Hygiene department for all consumable materials used in performing this maintenance action. Dispose of all non-metallic waste parts and products (e.g. rags contaminated with oil, grease, solvents, or other compounds, the compounds themselves, etc) in accordance with approved maintenance activity requirements and procedures. UNCLASSIFIED SAFETY-1

10 S6161-Z8-FSE-010 UNCLASSIFIED SPECIFIC WARNINGS AND CAUTIONS Specific warnings and cautions applicable to the Hoshizaki cubelet ice dispenser model DCM-270BAH appear throughout the text of this manual. Operators and maintenance personnel must be familiar with these warnings and cautions prior to operating this equipment or performing maintenance on it. SAFETY-2 UNCLASSIFIED

11 UNCLASSIFIED S6161-Z8-FSE-010 CHAPTER 1 GENERAL INFORMATION 1-1 SAFETY PRECAUTIONS. The general safety concepts include the safety of personnel and the prevention of damage to the Hoshizaki cubelet ice dispenser model DCM-270BAH. The responsibility for safety lies with the personnel who operate and maintain the equipment. Personnel should become familiar with this section and must observe the warnings and cautions throughout this manual. Specific precautions should be frequently reviewed to enable maintenance personnel to become familiar with their content and intent Warning/Caution/Note Usage. Warnings and cautions appearing throughout this maintenance manual are of utmost importance to personnel and equipment safety. All warnings and cautions should be thoroughly reviewed and understood before making any attempt to operate, maintain, troubleshoot, or repair any part of the Hoshizaki cubelet ice dispenser model DCM-270BAH. Refer to the Safety Summary, which appears in the front matter of this manual, for a summary of warnings and cautions used throughout this maintenance manual Warning/Caution/Note Definitions. The following paragraphs define warnings, cautions, and notes as they are used in this manual. WARNING Warnings identify an operating or maintenance procedure, practice, condition, or statement, which if not strictly followed, could result in death or injury to personnel. CAUTION Cautions identify an operating or maintenance procedure, practice, or condition, or statement, which, if not strictly followed, could result in equipment damage or serious impairment of system operation. NOTE Notes are used to highlight certain operating or maintenance conditions or statements that are essential but not of known hazardous nature as indicated by warnings and cautions. 1-2 INTRODUCTION. This manual applies to the Hoshizaki cubelet ice dispenser model DCM-270BAH manufactured by Hoshizaki America, Inc. This manual has been provided for use by qualified personnel in the operation, maintenance, and repair of the Hoshizaki cubelet ice dispenser model DCM-270BAH. It provides guidance for Hoshizaki cubelet ice dispenser model DCM-270BAH operation, troubleshooting, maintenance, and installation. To avoid repetition, references are made to appendices to this manual which contain required information. A listing of the appendices can be found in Table 1-2. Further information on the Hoshizaki cubelet ice dispenser model DCM-270BAH can be found in Appendix 1, Appendix 2 and Appendix EQUIPMENT DESCRIPTION. The Hoshizaki cubelet ice dispenser model DCM-270BAH includes water supply, freezer, condensing, storage, dispensing, and control assemblies. The ice maker can produce up to 282 pounds of ice every 24 hours. The 9-lb. capacity storage bin, timer agitator, and compressor are located in the upper half of the control box assembly. The fan, condenser, gear motor, and louver and air filter are located in the lower half of the control box assembly. The ice maker stands on adjustable legs. The minimum and maximum heights for the adjustable legs are 4 inches and 5.3 inches, respectively. For more detailed description of the Hoshizaki cubelet ice dispenser model DCM-270BAH, see Appendix 1, Section II, Paragraph 1. and Appendix 2, Section I, Paragraph 1. and Section II, Paragraph 1. UNCLASSIFIED 1-1

12 S6161-Z8-FSE-010 UNCLASSIFIED 1-4 EQUIPMENT, ACCESSORIES AND DOCUMENTS SUPPLIED. Table 1-1 lists the equipment, accessories and documents supplied with the Hoshizaki cubelet ice dispenser model DCM-270BAH. Table 1-1. Equipment, Accessories, and Documents Supplied Overall Dimensions (Inches) Qty Item Name and Nomenclature RIC No. Height Width Depth 1 Hoshizaki Cubelet Ice Dispenser Model DCM-270BAH 1 Technical Manual Description, Operation, Maintenance, and Installation Instructions Hoshizaki Cubelet Ice Dispenser Model DCM-270BAH Weight (lbs.) (RESERVED) 31-7/8 16-9/ / N/A EQUIPMENT, ACCESSORIES AND DOCUMENTS REQUIRED BUT NOT SUPPLIED. There is no equipment, accessories, or documents required but not supplied for the Hoshizaki cubelet ice dispenser model DCM-270BAH. 1-6 APPENDICES. Table 1-2 provides a listing of the appendices referenced within this manual. Table 1-2. Appendices Appendix Number Document Title Document Number/Date 1 Hoshizaki Cubelet Ice Dispenser Model DCM-270BAH, Instruction Manual 2 Hoshizaki Cubelet Ice Dispenser Model DCM-270BAH, Service Manual 3 Hoshizaki Cubelet Ice Dispenser Model DCM-270BAH, Parts List N/A Revised 12 December Revised 15 December Revised 7 January FIELD CHANGES AND FACTORY CHANGES. Table 1-3 is provided to record field changes and factory changes that have been incorporated into the Hoshizaki cubelet ice dispenser model DCM-270BAH or this technical manual. Table 1-3. Hoshizaki Cubelet Ice Dispenser Model DCM-270BAH Field Changes and Factory Changes Change No. Nomenclature Description 1-2 UNCLASSIFIED

13 UNCLASSIFIED S6161-Z8-FSE-010 CHAPTER 2 OPERATION 2-1 INTRODUCTION. The operation of the Hoshizaki cubelet ice dispenser model DCM-270BAH is limited to startup and shut down of the unit. 2-2 STARTUP. For startup operating procedures for the Hoshizaki cubelet ice dispenser model DCM-270BAH, see Appendix 1, Section III, Paragraph 7. For information concerning the efficient operation of the Hoshizaki cubelet ice dispenser model DCM-270BAH, see Appendix 1,SectionIV,Paragraph SHUT DOWN. To shut down the Hoshizaki cubelet ice dispenser model DCM-270BAH, reverse the procedure provided in Appendix 1, Section III, Paragraph 7. UNCLASSIFIED 2-1

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15 UNCLASSIFIED S6161-Z8-FSE-010 CHAPTER 3 FUNCTIONAL DESCRIPTION 3-1 INTRODUCTION. The function of the Hoshizaki cubelet ice dispenser model DCM-270BAH is to continuously produce ice cubelets from fresh water. Water flows from the ships potable water system through the water supply line shut-off valve, enters at the water inlet fitting, and flows into the water reservoir. The water reservoir maintains a constant water level inside the freezer assembly. From the water reservoir, water enters at the bottom of the freezer, where the refrigeration process forms ice. A stainless steel, rotating auger located inside the freezer is driven by an 80-watt gear motor. The rotating motion of the auger carries the ice in the freezer assembly upward to the end of the auger, where excess water is pressed out of the ice, the ice is extruded, broken into cubelet (compressed) ice, and pushed out of the freezer assembly into the ice storage bin. When the ice storage bin is filled with ice, the bin control switch shuts off the ice-making process. As the ice is removed from the storage bin, the bin control switch resets automatically and restarts the ice-making process. An agitator located in the storage bin prevents the ice from clustering so that it can move easily through a spout. For more information on the Hoshizaki cubelet ice dispenser model DCM-270BAH, see Appendix 1, Section II, Paragraph 2 and Appendix 2, Section II, Paragraph 2 and Section III,Paragraph1andParagraph2. UNCLASSIFIED 3-1

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17 UNCLASSIFIED S6161-Z8-FSE-010 CHAPTER 4 SCHEDULED MAINTENANCE 4-1 INTRODUCTION. This chapter contains the information required to perform Organizational (O)-level scheduled maintenance on the Hoshizaki cubelet ice dispenser model DCM-270BAH. Table 4-1 lists the O-level maintenance procedures with periodicity and the appendix section and paragraph that contains the procedure. Planned Maintenance to be conducted by Organizational ("O-Level") personnel (Ships Force) will be scheduled and performed in accordance with the Planned Maintenance System (PMS). Planned Maintenance beyond Organizational level capability will be performed by either an Intermediate Maintenance Activity (IMA "I-Level") or a Depot ("D-Level") activity and will be scheduled and performed in accordance with the Class Maintenance Plan for this component/system. When conflicts occur between the information provided here and the PMS documentation, PMS documentation will take precedence. Table 4-1. Hoshizaki Cubelet Ice Dispenser Model DCM-270BAH Scheduled Maintenance Periodicity Maintenance Procedure See Appendix/ Section/Paragraph Weekly Clean stainless steel exterior. Appendix 1, Section IV, Paragraph 3.1) and Appendix 2, Section IV, Second Paragraph 2.1) Bi-weekly Clean air filter. Appendix 1, Section IV, Paragraph 3.2) and Appendix 2, Section IV, Second Paragraph 2.2) Annually Clean condenser. Appendix 1, Section IV, Paragraph 3.3) and Appendix 2, Section IV, Second Paragraph 2.3) Semi-annually Clean and sanitize the cubelet ice dispenser. Appendix 1,SectionIV,Paragraph1. and Appendix 2, Section IV, First Paragraph 2. UNCLASSIFIED 4-1

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19 UNCLASSIFIED S6161-Z8-FSE-010 CHAPTER 5 TROUBLESHOOTING 5-1 INTRODUCTION. This chapter contains the information required to troubleshoot the Hoshizaki cubelet ice dispenser model DCM-270BAH. Table 5-1 lists casualty symptoms with the Appendix, Section and Paragraph number for the required troubleshooting information. Table 5-1. Hoshizaki Cubelet Ice Dispenser Model DCM-270BAH Troubleshooting Casualty Symptoms Casualty Symptom See Appendix/Section/Paragraph No Ice Production Appendix 2, Section IV, Paragraph 1. Low Ice Production Appendix 2, Section IV, Paragraph 2. Faulty Dispenser Appendix 2, Section IV, Paragraph 3. Other Problems Appendix 2, Section IV, Paragraph 4. Whenever troubleshooting the Hoshizaki cubelet ice dispenser model DCM-270BAH, refer to Appendix 2, Section III, Paragraphs 1., 2., 3., and 4. UNCLASSIFIED 5-1

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21 UNCLASSIFIED S6161-Z8-FSE-010 CHAPTER 6 CORRECTIVE MAINTENANCE 6-1 INTRODUCTION. This chapter contains the information required to perform corrective maintenance on the Hoshizaki cubelet ice dispenser model DCM-270BAH. Table 6-1 lists the corrective maintenance procedures with the Appendix, Section and Paragraph number that contains the procedure. Table 6-1. Hoshizaki Cubelet Ice Dispenser Model DCM-270BAH Corrective Maintenance Procedures Maintenance Procedure See Appendix/Section/Paragraph Service for Refrigerant Lines Appendix 2, Section V, Paragraph 1. Brazing Appendix 2, Section V, Paragraph 2. Removal and Replacement of Compressor Appendix 2, Section V, Paragraph 3. Removal and Replacement of Drier Appendix 2, Section V, Paragraph 4. Removal and Replacement of Thermostatic Expansion Valve Appendix 2, Section V, Paragraph 5. Removal and Replacement of Pressure Switch Appendix 2, Section V, Paragraph 6. Removal and Replacement of Control Water Valve Appendix 2, Section V, Paragraph 7. Removal and Replacement of Flush Water Valve Appendix 2, Section V, Paragraph 8. Removal and Replacement of Float Switch Appendix 2, Section V, Paragraph 9. Removal and Replacement of Bin Control Switch Assembly Appendix 2, Section V, Paragraph 10. Removal and Replacement of Storage Bin Assembly Appendix 2, Section V, Paragraph 11. Removal and Replacement of Agitator and Drip Ring Appendix 2, Section V, Paragraph 12. Removal and Replacement of Evaporator Assembly Appendix 2, Section V, Paragraph 13. UNCLASSIFIED 6-1

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23 UNCLASSIFIED S6161-Z8-FSE-010 CHAPTER 7 PARTS LIST 7-1 INTRODUCTION. See Appendix 3 for the complete illustrated parts list for the Hoshizaki cubelet ice dispenser model DCM-270BAH. UNCLASSIFIED 7-1

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25 UNCLASSIFIED S6161-Z8-FSE-010 CHAPTER 8 INSTALLATION 8-1 INTRODUCTION. Installation instructions for the Hoshizaki cubelet ice dispenser model DCM-270BAH are contained in Appendix 1, Section III, Paragraphs 1., 2., 3., 4., 5., 6., and LONG TERM STORAGE. Instructions for preparing the Hoshizaki cubelet ice dispenser model DCM-270BAH for long term storage are contained in Appendix 1, Section III, Paragraph 8. UNCLASSIFIED 8-1

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27 S6161-Z8-FSE-010 APPENDIX 1 Hoshizaki Cubelet Ice Dispenser Model DCM-270BAH, Instruction Manual Appendix 1 has been supplied as a separate PDF file. To view Appendix 1 click on the ICON below. 1-1

28 Reliability is a beautiful thing TM CUBELET ICE DISPENSER DCM-270BAH INSTRUCTION MANUAL ISSUED: NOV. 29, 2000 REVISED: DEC. 12, 2003

29 IMPORTANT Only qualified service technicians should attempt to install, service or maintain this ice dispenser. No installation, service or maintenance should be undertaken until the technician has thoroughly read this Instruction Manual. Likewise, the owner/manager should not proceed to operate the ice dispenser until the installer has instructed them on its proper operation. HOSHIZAKI provides this manual primarily to assist qualified service technicians in the installation, maintenance and service of the ice dispenser. Should the reader have any questions or concerns which have not been satisfactorily addressed, please call or write to the HOSHIZAKI Technical Support Department for assistance. HOSHIZAKI AMERICA, INC. 618 Highway 74 South Peachtree City, GA Attn: HOSHIZAKI Technical Support Department Phone: Technical Service (770) Fax: (770) NOTE: To expedite assistance, all correspondence/communication MUST include the following information: Model Number Serial Number Complete and detailed explanation of the problem 2

30 Please review this manual. It should be read carefully before the ice dispenser is installed and operated. Only qualified service technicians should install, service and maintain the ice dispenser. This manual should be made available to the technician prior to installation, maintenance or service. Keep this manual with the ice dispenser for later reference. CONTENTS PAGE I. SPECIFICATIONS NAMEPLATE RATING DIMENSIONS/CONNECTIONS... 5 II. GENERAL INFORMATION CONSTRUCTION OPERATION - How it works... 7 III. INSTALLATION AND OPERATING INSTRUCTIONS CHECKS BEFORE INSTALLATION HOW TO REMOVE PANELS LOCATION ELECTRICAL CONNECTION WATER SUPPLY AND DRAIN CONNECTIONS FINAL CHECK LIST START UP PREPARING THE ICE DISPENSER FOR LONG STORAGE IV. CLEANING AND MAINTENANCE INSTRUCTIONS CLEANING INSTRUCTIONS [a] CLEANING PROCEDURE [b] SANITIZING PROCEDURE EFFICIENT USE OF CUBELET ICE MAINTENANCE

31 I. SPECIFICATIONS 1. NAMEPLATE RATING MODEL NUMBER DCM-270BAH AC SUPPLY VOLTAGE 115/60/1 AMPERES 8.5 AMPS DESIGN PRESSURE HI-427PSI LO-230PSI REFRIGERANT 404A 14.8 oz. MOTOR-COMPRESSOR THERMALLY PROTECTED SERIAL NUMBER See the Nameplate for electrical and refrigeration specifications. This Nameplate is located on the upper left hand side of the Rear Panel. We reserve the right to make changes in specifications and design without prior notice. 4

32 2. DIMENSIONS/CONNECTIONS Unit: inch (mm) 5

33 II. GENERAL INFORMATION 1. CONSTRUCTION The Hoshizaki Cubelet Ice Dispenser, model DCM-270BAH includes Water Supply, Freezer, Condensing, Storage, Dispensing and Control Assemblies. Fig. 1 Note: *Adjustable Legs Minimum height - 4" Maximum height - 5.3" Do not adjust exceeding the above recommendation. 6

34 2. OPERATION - How it works Water flows from the potable water source through the Water Supply Line Shut-off Valve, enters at the Water Inlet fitting and into the Water Reservoir. The Water Reservoir functions to maintain a constant water level inside the Freezer Assembly. Water from the Water Reservoir enters at the bottom of the Freezer. Heat is removed by the refrigeration process and ice forms inside the Freezer. A stainless steel Auger, located inside the Freezer, is direct-driven by the Gear Motor, and the rotating Auger carries the ice upward to the end of the Auger, where excess water is pressed out of the ice, as the ice is extruded and broken into cubelet ice (compressed ice) and then pushed out into the Storage Bin. Moving the Power Switch on the bottom left of the Middle Front Panel, to the ON position starts the automatic and continuous icemaking process. When the Ice Storage Bin is filled with ice, the Bin Control Switch will shut off the icemaking process. As the ice is removed from the Storage Bin, the Bin Control Switch resets automatically and restarts the icemaking process. The Agitator in the Storage Bin keeps the ice from clustering so that the ice can move easily through the Spout. 7

35 III. INSTALLATION AND OPERATING INSTRUCTIONS 1. CHECKS BEFORE INSTALLATION IMPORTANT 1. Remove shipping carton, tape(s) and packing. If packing material is left in the ice dispenser, it will not work properly. 2. Ensure all components, fasteners and thumbscrews are securely in place. 1) Be careful not to damage the panels when installing the ice dispenser. 2) Remove the package containing accessories. 3) Check that a 1A spare fuse for the Transformer is provided in the small vinyl bag. 4) Check that refrigerant lines do not rub or touch lines or other surfaces, and that the fan blade moves freely. 5) Check that the compressor is snug on all mounting pads. 6) See the Nameplate on the upper left hand side of the Rear Main Panel, and check that your voltage supplied corresponds with the voltage specified on the Nameplate. 2. HOW TO REMOVE PANELS - See Fig. 2 a) Top Panel... Remove the two screws. Lift up and off. b) Upper Front Panel... Remove the inside screw attaching the panel to the Middle Front (black) Panel. Lift up and pull toward you. c) Side Panels... Remove two screws and pull off. d) Apron Panel... Remove four screws and pull off. Fig. 2 8

36 3. LOCATION WARNING This ice dispenser is not intended for outdoor use. Normal operating ambient temperature should be within +45 F to +100 F; normal operating water temperature should be within +45 F to +90 F. Operation of the ice dispenser, for extended periods, outside of these normal temperature ranges may affect production capacity. For best operating results: Ice dispenser should not be located next to ovens, grills or other high heat producing equipment. Location should provide a firm foundation for the equipment. Level the ice dispenser from side-to-side and front-to-rear Allow 6" clearance at rear and left side, 10" at right side and 20" at top for proper air circulation and ease of maintenance and/or service should they be required. Avoid a site where dripping is not allowed. 4. ELECTRICAL CONNECTION This ice dispenser must have a separate power supply or receptacle of proper capacity. See the Nameplate. 9

37 5. WATER SUPPLY AND DRAIN CONNECTIONS - See Fig. 3 When the water supply is off, or if the pressure is below 10 PSIG, the protection circuit stops the operation of the ice dispenser. Wait until the proper water pressure is reached. Water supply inlet is 1/2" female pipe thread (FPT). A water supply line shut-off valve and drain valve should be installed. Water supply pressure should be a minimum of 10 PSIG and a maximum of 113 PSIG. If the pressure exceeds 113 PSIG, use a pressure reducing valve. Drain outlet is 3/4" male pipe thread (MPT). The drains must have 1/4" fall per foot on horizontal runs to get a good flow. Keep more than a 2" air gap between drain pipe ends or hose ends and a sink or the like. A plumbing permit and services of a licensed plumber may be required in some areas. Fig. 3 10

38 6. FINAL CHECK LIST 1) Is the ice dispenser level? 2) Is the ice dispenser in a site where the ambient temperature is within +45 F to +100 F all year around? 3) Is there at least 6" clearance at rear and left side, 10" at right side and 20" at top for maintenance or service? 4) Have all shipping carton, tapes and packing been removed from the ice dispenser? 5) Are all components, fasteners and thumbscrews securely in place? 6) Have all electrical and piping connections been made? 7) Has the power supply voltage been checked or tested against the nameplate rating? 8) Are the Water Supply Line Shut-off Valve and Drain Valve installed? Has the water supply pressure been checked to ensure a minimum of 10 PSIG and a maximum of 113 PSIG? 9) Have the compressor hold-down bolts and refrigerant lines been checked against vibration and possible failure? 10) Has the Bin Control Switch been checked for correct operation? Lift the disk on the bottom of the Storage Bin Cover. The Compressor should stop 90 sec. later, and the Gear Motor 150 sec. later. 11) Has the end user been given the instruction manual, and instructed on how to operate the ice dispenser and the importance of the recommended periodic maintenance? 12) Has the end user been given the name and telephone number of an authorized service agent? 13) Has the warranty tag been filled out and forwarded to the factory for warranty registration? 11

39 7. START UP WARNING 1. All parts are factory-adjusted. Improper adjustments may result in failure. 2. If the unit is turned off, wait for at least 3 minutes before restarting the ice dispenser to prevent damage to the Compressor. 1) Clean the Storage Bin. 2) Open the Water Supply Line Shut-off Valve. 3) Plug in and move the Power Switch, located on the left bottom of the Middle Front Panel, to the ON position. 4) Move the Ice Making Switch, located on the Control Box, to the ON position. 5) Check that water flows into the Reservoir and the Freezer Assembly: Water flows into the Reservoir through the Water Valve. Water flows into the Freezer bottom through the Feeder Tubing. The Float Switch trips to close the Water Valve. 6) Check the water supply and drain connections for water leaks. 7) After the Water Valve closed, the Gear Motor starts first, and then the Compressor starts in approximately 60 sec. An automatic and continuous icemaking process starts. 8) In a few minutes, cubelet ice is extruded into the Storage Bin. 9) Check if there is any abnormal noise from the Compressor, the Fan Motor or the Gear Motor after 30 minutes of running. 10) Press the push button labelled ICE and the Solenoid Shutter Valve opens to dispense ice. 12

40 8. PREPARING THE ICE DISPENSER FOR LONG STORAGE IMPORTANT When shutting off the ice dispenser for an extended time, drain out all water from the water line and remove the ice from the Storage Bin. The Storage Bin should be cleaned and dried. Drain the ice dispenser to prevent damage to the water supply line at sub-freezing temperatures, using air or carbon dioxide. Shut off the ice dispenser until the proper ambient temperature is resumed. 1) Close the Water Supply Line Shut-off Valve. 2) Move the Ice Making Switch, located on the Control Box, to the FLUSH position. 3) Press the Push Button for ice dispensing, and remove all ice from the Storage Bin. 4) Wait until all water is drained out into Drain Pan and then turn Power Switch to the OFF Position. 5) Unplug the ice dispenser. 13

41 IMPORTANT Before operating the dispenser next time, check that the Drain Valve is closed, and open the Water Supply Line Shut-off Valve. Note: When shutting off the ice dispenser at sub-freezing temperatures, run the ice dispenser, with the Water Supply Line Shut-off Valve closed, and blow out the water inlet line, by using air pressure. See Fig. 4. Fig. 4 14

42 IV. CLEANING AND MAINTENANCE INSTRUCTIONS IMPORTANT Ensure all components, fasteners and thumbscrews are securely in place after any maintenance or cleaning is done to the equipment. 1. CLEANING INSTRUCTIONS WARNING 1. HOSHIZAKI recommends cleaning this unit at least twice a year. More frequent cleaning, however, may be required in some existing water conditions. 2. To prevent injury to individuals and damage to the ice dispenser, do not use ammonia type cleaners. 3. Always wear liquid-proof gloves for safe handling of the cleaning and sanitizing solutions. This will prevent irritation from the solution contacting the skin. [a] CLEANING PROCEDURE 1) Close the Water Supply Line Shut-off Valve. 2) Dilute approximately 6 fl. oz. of the recommended cleaner Hoshizaki Scale Away or LIME-A-WAY, (Economics Laboratory, Inc.) with 1 gal. of water. 3) Move the Ice Making Switch, located on the Control Box, to the FLUSH position. 4) Press the Ice Push Button and remove all ice from the Storage Bin. 5) After all water has drained out of Drain Pan, turn Power Switch to the OFF position. 6) Remove the Spouts (A) and (B) by removing the Thumbscrew, sliding the Spouts backward and then pulling them down. See Fig. 5. 7) Pull out Spout (A) from Spout (B). 8) Remove the Top Panel and Storage Bin Cover. See Fig. 6. 9) Remove the Agitator and Drip Ring. Wipe, using a clean cloth containing the cleaning solution. See Fig

43 Thumbscrew Fig. 5 Fig. 6 16

44 10) Pour the cleaning solution carefully into the Reservoir through the opening in the center of the Storage Bin up to the overflow level. (Overflowed solution can be seen in the Drain Pan.) 11) While waiting for 10 minutes to start icemaking process, wipe the Bin Liner and the Drip Plate using a clean cloth containing the cleaning solution. 12) Replace the Drip Ring and Agitator in their correct positions. 13) Move the Ice Making Switch and the Power Switch to the ON position. Place the Storage Bin Cover in position, and start the automatic icemaking process. Run the ice dispenser until it stops automatically. 14) Move the Ice Making Switch to the FLUSH position and wait for the flush process to begin (60 seconds). 15) Pour clean warm water carefully onto the Bin Liner, Agitator, Drip Ring and into the Reservoir through the opening in the center of the Storage Bin to melt the ice and rinse out the cleaning solution. 16) After water has drained out of Drain Pan, turn Power Switch to the OFF position. 17) Wipe the Storage Bin Cover and Spouts (A) and (B) using a clean cloth containing the cleaning solution. 18) Rinse the wiped parts with water. Be careful not to wet the Bin Control Switch on the Storage Bin Cover. CAUTION Do not use ice produced with cleaning or sanitizing solutions. Be sure none remains in the Storage Bin. [b] SANITIZING PROCEDURE - Following Cleaning Procedure 1) Dilute approximately 1.5 fl. oz. of a 5.25% Sodium Hypochlorite solution (chlorine bleach) with 3 gal. of water. 2) Pour the sanitizing solution carefully into the Reservoir through the opening in the center of the Storage Bin up to the overflow level. 3) Wait for 10 minutes to start icemaking process. Move the Ice Making Switch to the ON position, and start automatic icemaking process. Run the ice dispenser until it stops automatically. 17

45 4) Move the Ice Making Switch to the FLUSH position. 5) Wipe the Bin Liner and the Drip Plate using a clean cloth containing the sanitizing solution. 6) Pour clean warm water carefully onto the Bin Liner and into the Reservoir through the opening in the center of the Storage Bin to melt the ice and rinse out the sanitizing solution. Be careful not to wet the Bin Control Switch on the Storage Bin Cover. 7) Remove the Bin Control Switch from the Storage Bin Cover and immerse the Storage Bin Cover, Agitator, Drip Ring and Spouts (A) and (B) in the sanitizing solution. 8) Rinse the sanitized parts with water. 9) Place the rinsed parts in position. Re-attach the Bin Control Switch to the Storage Bin Cover. 10) Move the Ice Making Switch to the ON position, open the Water Supply Line Shut-off Valve and start the icemaking process. Run the ice dispenser for about 30 minutes. 11) Move the Ice Making Switch to the FLUSH position and let all water drain out through the Drain Pan. 12) Press the Ice Push Button, and remove all ice from the Storage Bin. 13) Place the Top Panel in position. 14) Move the Ice Making Switch to the ON position. 2. EFFICIENT USE OF CUBELET ICE 1) When soggy ice is produced, keep removing it until good ice is produced. When the ice in the Storage Bin is not used for a long time it may melt in the bin, becoming somewhat soggy. 2) The agitator will turn slightly every 90 minutes to keep ice from melting together. 3) Within 50 to 60 minutes after the Ice Making Switch is turned on, the Storage Bin will be filled with ice and peak performance will be reached. 18

46 3. MAINTENANCE IMPORTANT This ice dispenser must be maintained individually, referring to the instruction manual and labels provided with the ice dispenser. 1) Stainless Steel Exterior To prevent corrosion, wipe the exterior occasionally with a clean and soft cloth. Use a damp cloth containing a neutral cleaner to wipe off oil or dirt build up. 2) Air Filter - See Fig. 7 A plastic mesh air filter removes dirt or dust from the air, and keeps the Condenser from getting clogged. As the filter gets clogged, the ice dispenser s performance will be reduced. Check the filter at least twice a month. When clogged, use warm water and a neutral cleaner to wash the filter. 3) Condenser Check the Condenser once a year, and clean if required by using a brush or vacuum cleaner. More frequent cleaning may be required depending on the location of the ice dispenser. Fig. 7 19

47 HOSHIZAKI HOSHIZAKI AMERICA, INC. 618 HIGHWAY 74 SOUTH PEACHTREE CITY, GA U.S.A. PHONE: A23B10B

48 S6161-Z8-FSE-010 APPENDIX 2 Hoshizaki Cubelet Ice Dispenser Model DCM-270BAH, Service Manual Appendix 2 has been supplied as a separate PDF file. To view Appendix 2 click on the ICON below. 2-1

49 Reliability is a beautiful thing TM CUBELET ICE DISPENSER DCM-270BAH SERVICE MANUAL NUMBER: ISSUED: APRIL 30, 2002 REVISED: DEC. 15, 2003

50 IMPORTANT Only qualified service technicians should attempt to service or maintain this ice dispenser. 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 dispenser. Should the reader have any questions or concerns which have not been satisfactorily addressed, please call or write to the HOSHIZAKI Technical Support Department for assistance. HOSHIZAKI AMERICA, INC. 618 Highway 74 South Peachtree City, GA Attn: HOSHIZAKI Technical Support Department Phone: Technical Service (770) Fax: (770) NOTE: To expedite assistance, all correspondence/communication MUST include the following information: Model Number Serial Number Complete and detailed explanation of the problem 2

51 Please review this manual. It should be read carefully before the ice dispenser is serviced or maintenance operations performed. Only qualified service technicians should service and maintain the dispenser. This manual should be made available to the technician prior to service or maintenance. CONTENTS PAGE I. SPECIFICATIONS DCM-270BAH (Air-cooled)... 4 II. GENERAL INFORMATION CONSTRUCTION OPERATION - How it works... 6 III. TECHNICAL INFORMATION WATER CIRCUIT AND REFRIGERANT CIRCUIT PERFORMANCE DATA WIRING DIAGRAM SEQUENCE OF ELECTRICAL CIRCUIT IV. SERVICE DIAGNOSIS NO ICE PRODUCTION LOW ICE PRODUCTION FAULTY DISPENSER OTHERS V. REMOVAL AND REPLACEMENT OF COMPONENTS SERVICE FOR REFRIGERANT LINES [a] REFRIGERANT RECOVERY [b] EVACUATION AND RECHARGE [R-404A] BRAZING REMOVAL AND REPLACEMENT OF COMPRESSOR REMOVAL AND REPLACEMENT OF DRIER REMOVAL AND REPLACEMENT OF THERMOSTATIC EXPANSION VALVE REMOVAL AND REPLACEMENT OF PRESSURE SWITCH REMOVAL AND REPLACEMENT OF CONTROL WATER VALVE REMOVAL AND REPLACEMENT OF FLUSH WATER VALVE REMOVAL AND REPLACEMENT OF FLOAT SWITCH REMOVAL AND REPLACEMENT OF BIN CONTROL SWITCH ASSEMBLY REMOVAL AND REPLACEMENT OF STORAGE BIN ASSEMBLY REMOVAL AND REPLACEMENT AGITATOR AND DRIP RING REMOVAL AND REPLACEMENT OF EVAPORATOR ASSEMBLY VI. CLEANING AND MAINTENANCE INSTRUCTIONS PREPARING THE ICE DISPENSER FOR LONG STORAGE CLEANING INSTRUCTIONS [a] CLEANING PROCEDURE [b] SANITIZING PROCEDURE MAINTENANCE INSTRUCTIONS

52 I. SPECIFICATIONS 1. DCM-270BAH (Air-cooled) AC SUPPLY VOLTAGE 115/60/1 AMPERAGE 8.5 A [AT 104 F(40 C)/WT 80 F(27 C)] MINIMUM CIRCUIT AMPACITY N/A MAXIMUM FUSE SIZE N/A APPROXIMATE ICE PRODUCTION Ambient WATER TEMP. ( F) PER 24 HR. Temp.( F) lbs./day ( kg/day ) 70 *282 (128) 271 (123) 259 (118) Reference without *marks (113) 238 (108) 228 (103) (99) *215 (98) 201 (91) (87) 184 (84) *172 (78) SHAPE OF ICE Cubelet (compressed flake ice) ICE QUALITY Approx. 90%, Ice (90/70 F, Conductivity 200 µs/cm) APPROXIMATE STORAGE CAPACITY 8.8 lbs ELECTRIC & WATER CONSUMPTION 90/70 F 70/50 F ELECTRIC W (kwh/100 lbs.) 686 (7.6) 641 (5.5) POTABLE WATER 25.6 (12) 32.8 (12) gal./24hr (gal./100 lbs.) EXTERIOR DIMENSIONS (WxDxH) 16-9/16" x 24-3/16" x 31-7/8" (420 x 615 x 809mm) EXTERIOR FINISH Stainless Steel, plastic top WEIGHT Net 152 lbs. ( 69 kg ), Shipping 170 lbs. ( 77 kg ) CONNECTIONS - ELECTRIC Cord Connection - WATER SUPPLY Inlet 1/2" FPT - DRAIN Outlet 3/4" MPT ICE MAKING SYSTEM Auger type HARVESTING SYSTEM Direct Driven Auger ( 80 W Gear Motor ) ICE MAKING WATER CONTROL Float Switch COOLING WATER CONTROL N/A BIN CONTROL SYSTEM Mechanical Bin Control ( micro switch ) COMPRESSOR Hermetic, Model ASE24C3E-IAA-252 CONDENSER Air-cooled, Fin and tube type EVAPORATOR Copper Tube on Cylinder REFRIGERANT CONTROL Thermostatic Expansion Valve REFRIGERANT CHARGE R-404A 14.8 oz. (420g) DESIGN PRESSURE High 427 PSIG, Low 230 PSIG COMPRESSOR PROTECTION Auto-Reset Overload Protector GEAR MOTOR PROTECTION Manual Reset Circuit Breaker REFRIGERANT CIRCUIT PROTECTION Auto-reset High Pressure Control Switch LOW WATER PROTECTION Float Switch and Timer ACCESSORIES -SUPPLIED N/A OPERATING CONDITIONS VOLTAGE RANGE V AMBIENT TEMP F WATER SUPPLY TEMP F WATER SUPPLY PRESSURE PSIG We reserve the right to make changes in specifications and design without prior notice. 4

53 II. GENERAL INFORMATION 1. CONSTRUCTION The Hoshizaki Cubelet Ice Dispenser, model DCM-270BAH includes Water Supply, Freezer, Condensing, Storage, Dispensing and Control Assemblies. Fig. 1 Note: *Adjustable Legs Minimum height - 4" Maximum height - 5.3" Do not adjust exceeding the above recommendation. 5

54 2. OPERATION - How it works Water flows from the potable water source through the Water Supply Line Shut-off Valve, enters at the Water Inlet fitting and into the Water Reservoir. The Water Reservoir functions to maintain a constant water level inside the Freezer Assembly. Water from the Water Reservoir enters at the bottom of the Freezer. Heat is removed by the refrigeration process and ice forms inside the Freezer. A stainless steel Auger, located inside the Freezer, is direct-driven by the Gear Motor, and the rotating Auger carries the ice upward to the end of the Auger, where excess water is pressed out of the ice, as the ice is extruded and broken into cubelet ice (compressed ice) and then pushed out into the Storage Bin. Moving the Power Switch on the bottom left of the Middle Front Panel, to the ON position starts the automatic and continuous icemaking process. When the Ice Storage Bin is filled with ice, the Bin Control Switch will shut off the icemaking process. As the ice is removed from the Storage Bin, the Bin Control Switch resets automatically and restarts the icemaking process. The Agitator in the Storage Bin keeps the ice from clustering so that the ice can move easily through the Spout. Fig. 2 6

55 III. TECHNICAL INFORMATION 1. WATER CIRCUIT AND REFRIGERANT CIRCUIT 7

56 2. PERFORMANCE DATA DCM-270BAH (Air-cooled) APPROXIMATE Ambient Water Temp. (F) ICE PRODUCTION Temp. (F) PER 24 HR (128) 271 (123) 259 (118) (113) 238 (108) 228 (103) (99) 215 (98) 201 (91) lbs./day ( kg/day) (87) 184 (84) 172 (78) APPROXIMATE ELECTRIC CONSUMPTION watts APPROXIMATE WATER (128) 32 (123) 31 (118) CONSUMPTION PER 24 HR (113) 29 (108) 27 (103) (99) 26 (98) 24 (91) gal. / day (l/day) (87) 22 (84) 21 (78) EVAPORATOR OUTLET TEMP (-7) 20 (-7) 20 (-7) F ( C) (-7) 23 (-5) 23 (-5) (-5) 23 (-5) 24 (-4) (-4) 24 (-4) 24 (-4) HEAD PRESSURE (15.2) 217 (15.2) 217 (15.2) (17.6) 251 (17.6) 251 (17.6) (20.0) 285 (20.0) 285 (20.0) PSIG (kg/sq.cmg) (23.0) 327 (23.0) 327 (23.0) SUCTION PRESSURE (2.6) 37 (2.6) 37 (2.6) PSIG (kg/sq.cmg) (2.8) 40 (2.8) 40 (2.8) (3.0) 43 (3.0) 43 (3.0) (3.2) 46 (3.2) 46 (3.2) TOTAL HEAT OF REJECTION 3532 BTU/h (AT 90 F /WT 70 F) Note: Pressure data is recorded first 5 minutes in freezing cycle. The data without *marks should be used for reference. We reserve the right to make changes in specifications and design without prior notice. 8

57 3. WIRING DIAGRAM 9

58 4. SEQUENCE OF ELECTRICAL CIRCUIT 10 A2AAA

59 A2AAA

60 12

61 13

62 14

63 15

64 16

65 17

66 18

67 19

68 20

69 IV. SERVICE DIAGNOSIS 1. NO ICE PRODUCTION PROBLEM POSSIBLE CAUSE REMEDY [1] The ice dispenser will a) Power Supply Cord 1) Broken or loose connection. 1) Check for continuity and replace. not start. 1) OFF position. 1) Move to ON position. [2] Water Valve operates, but no ice is produced. [3] Compressor will not start. [4] Gear Motor will not start. b) Power Switch (on left bottom of Front Panel) c) Fuse 1A (Control Box) a) Water Supply Line b) Water Valve c) Water Control Relay d) Timer a) Compressor b) Timer c) Motor Protector d) Starter e) Starting Capacitor a) Gear Motor b) Timer c) Protect Relay d) Protector e) Capacitor 1) Blown out. 1) Shut-off Valve closed. 2) Water supply OFF 1) Clogged. 1) Bad contacts (Terminal Nos. 4 and 6). 2) Coil winding opened. 3) Loose connections. 1) Bad contacts. 2) Coil winding opened. 3) Loose connections. 4) Defective. 1) Motor winding opened or grounded. 1) Bad contacts (X2 Relay). 2) X2 Relay coil winding opened. 3) Loose connections. 1) Bad contacts. 1) Bad contacts. 1) Defective. 1) Motor winding opened. 1) Bad contacts (X1 Relay). 1) Bad contacts. 2) Coil winding opened. 3) Loose connections. 1) Bad Contact. 1) Defective 1) Check for short-circuit and replace. 1) Open. 2) Check and get recommended pressure. 1) Clean. 1) Check for continuity and replace. 2) Replace. 3) Tighten. 1) Check for continuity and replace. 2) Replace. 3) Tighten. 4) Replace. 1) Replace. 1) Check for continuity and replace. 2) Replace. 3) Tighten. 1) Check for continuity and replace. 1) Check for continuity and replace. 1) Replace. 1) Replace. 1) Check for continuity and replace. 1) Check for continuity and replace. 2) Replace. 3) Tighten. 1) Check for continuity and replace. 1) Replace. 21

70 PROBLEM POSSIBLE CAUSE REMEDY [5] Fan Motor will not start. [6] No water or poor flow. a) Fan Motor b) Timer a) Water supply b) Water Valve c) Float Switch d) Water Control Relay e) Bin Control Switch f) Ice Making Switch 1) Motor winding opened. 2) Bearing worn out. 3) Wiring to Fan Motor. 4) Fan blade bound. 1) Bad contacts (X2 Relay). 2) X2 Relay coil winding opened. 3) Loose connections. 1) Water failure or pressure too low. 2) Shut-off Valve closed or restricted. 1) Clogged filter. 2) Coil winding opened. 1) Contacts fused. 2) Clogged. 1) Bad Contacts (Terminal Nos. 1 and 5). 2) Contacts fused (Terminal Nos. 3 and 5). 1) Bad contacts. 1) OFF position. 2) Bad contacts. 1) Replace. 2) Replace. 3) Check for loose connection or open, and replace. 4) Check and replace. 1) Check for continuity and replace. 2) Replace. 3) Tighten. 1) Wait until water is supplied, or adjust the pressure range within PSIG. 2. Open. 1) Clean. 2) Replace. 1) Replace. 2) Clean. 1) Check for continuity and replace. 1) Replace. 1) Check for continuity and replace. 1) Move to ON position. 2) Check for continuity and replace. [7] Ice dispenser will not stop even if out of water. a) Float Switch b) Water Control Relay 1) Contacts fused. 2) Clogged. 1) Contacts fused (Terminal Nos. 4 and 6). 1) Replace. 2) Clean. 1) Replace. 22

71 2. LOW ICE PRODUCTION PROBLEM [1] Abnormal refrigeration circuit. a) Condenser b) Thermostatic Expansion Valve c) Refrigerant Lines d) Compressor Motor Protector e) Inside wall of Evaporator POSSIBLE CAUSE 1) Dirty Air Filter or Condenser. 2) Bad ventilation. 1) Low-side pressure or temperature exceeding the limit. 1) Gas leaks. 2) Overcharged. 1) Overload Protector stops Compressor intermittently. 1) Scale on inside wall of Freezing Cylinder. REMEDY 1) Clean. 2) Remove anything blocking vents. 1) Secure bulb to low-side line or replace. 1) Check for leaks with a leak detector. Reweld leak, replace drier and charge with refrigerant. The amount of refrigerant is marked on Nameplate. 2) Recharge. 1) Check Condenser and Fan Motor. 1) Remove Auger, use Hoshizaki Scale Away or LIME-A-WAY solution to clean periodically. [2] Condensing temperature too high. [3] Poor water flow. a) Condenser b) Fan Motor a) Water supply 1) Dirty Air Filter or Condenser. 2) Bad ventilation. 3) Ambient temperature too high. 4) Less than 6" clearance at rear, sides and top. 1) Fan revolving too slowly. 1) Water pressure too low. If water is found to surpass the following levels, install a conditioner: Hardness 50 ppm Silica 30 ppm 1) Clean. 2) Remove anything blocking vents. 3) Check ventilation and location, and change as needed. 4) Allow proper clearance for ventilation. 1) See chart 1 - [5] - a). 1) See chart 1 - [6] - a). 23