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manual abstract
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 Technical Support Department for assistance. HOSHIZAKI AMERICA, INC. 618 Highway 74 South Peachtree City, GA 30269 Attn: HOSHIZAKI Technical Support Department Phone: 1-800-233-1940 Technical Service (770) 487-2331 Fax: 1-800-843-1056 (770) 487-3360 E-mail: techsupport@hoshizaki.com Web Site: NOTE: To expedite assistance, all correspondence/communication MUST include the following information: • Model Number • Serial Number • Complete and detailed explanation of the problem 2 Please review this manual. It should be read carefully before the unit is serviced or maintenance operations are performed. Only qualified service technicians should service and maintain the unit. This manual should be made available to the technician prior to service or maintenance. CONTENTS I. Specifications...................................................................................................................... 5 II. General Information ........................................................................................................... 6 A. Construction.................................................................................................................. 6 B. Sequence of Operation ................................................................................................. 7 1. One Minute Fill Cycle .............................................................................................. 7 2. Initial Harvest Cycle ................................................................................................ 7 3. Freeze Cycle ........................................................................................................... 7 4. Pump-Out Cycle ..................................................................................................... 7 5. Normal Harvest Cycle ............................................................................................ 7 C. Control Board................................................................................................................ 9 1. Control Board Layout............................................................................................. 10 2. Features ................................................................................................................ 11 a) Maximum Water Supply Period – 6 minutes...................................................... 11 b) Harvest Backup Timer and Freeze Timer.......................................................... 11 c) High Temperature Safety ................................................................................... 11 d) Low Water Safety .............................................................................................. 11 e) High Voltage and Low Voltage Cut-outs ............................................................ 11 f) LED Lights and Audible Alarm Safeties.............................................................. 12 3. Controls and Adjustments ..................................................................................... 13 a) Default Dip Switch Settings ............................................................................... 13 b) Harvest Control – Thermistor ............................................................................ 13 c) Harvest Timer (dip switch 1 & 2)........................................................................ 14 d) Pump-Out Timer (dip switch 3 & 4) ................................................................... 14 e) Pump-Out Frequency Control (dip switch 5 & 6) ............................................... 15 f) Freeze Timer (dip switch 9 & 10)........................................................................ 15 g) Bin Control ........................................................................................................ 15 4. Bin Control Troubleshooting................................................................................... 16 a) Machine Will Not Start....................................................................................... 16 b) Machine Will Not Shut Off ................................................................................. 16 5. Control Board Check Procedure............................................................................ 16 6. Control Board Replacement .................................................................................. 17 D. Switches...................................................................................................................... 17 1. Control Switch ...........................