Hoshizaki F-300BAF Service Manual
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Hoshizaki F-300BAF Service Manual

Hoshizaki F-300BAF Service Manual

Self-contained flaker
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Hoshizaki
Hoshizaki America, Inc.
"A Superior Degree
of Reliability"
www.hoshizaki.com
Self-Contained Flaker
Model
F-300BAF
SERVICE MANUAL
Number: 73072
Issued: 3-2-1999
Revised: 01-25-2007

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Summary of Contents for Hoshizaki F-300BAF

  • Page 1 Hoshizaki America, Inc. “A Superior Degree of Reliability” www.hoshizaki.com Self-Contained Flaker Model F-300BAF SERVICE MANUAL Number: 73072 Issued: 3-2-1999 Revised: 01-25-2007...
  • Page 2 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.

  • Page 3: Table Of Contents

    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.
  • Page 4 V. Removal and Replacement of Components ... 33 A. Service for Refrigerant Lines ... 33 1. Refrigerant Recovery ... 33 2. Evacuation and Recharge [R-404A] ... 33 B. Brazing ... 34 C. Removal and Replacement of Compressor ... 35 D. Removal and Replacement of Drier ... 36 E.

  • Page 5: Specifications

    I. Specifications A. Icemaker 1. F-300BAF AC SUPPLY VOLTAGE AMPERAGE MINIMUM CIRCUIT AMPACITY MAXIMUM FUSE SIZE APPROXIMATE ICE PRODUCTION PER 24 HR. lbs./day ( kg/day ) Reference without *marks SHAPE OF ICE ICE QUALITY APPROXIMATE STORAGE CAPACITY ELECTRIC & WATER CONSUMPTION ELECTRIC W (kWH/100 lbs.)

  • Page 6: General Information

    II. General Information A. Construction 1. F-300BAF Bin Control * Spout Evaporator Gear Motor Compressor *The switch actuator is located in the ice storage bin. Ice Storage Bin Sliding Door Control Water Valve Reservoir Expansion Valve Control Box Air-cooled Condenser...

  • Page 7: Ice Making Unit

    B. Ice Making Unit...

  • Page 8: Control Box Layout

    C. Control Box Layout 1. F-300BAF a) Auxiliary Code K-1 and Earlier FLUSH SWITCH POWER SWITCH CONTROL BOARD FUSE (1A) CIRCUIT BREAKER GEAR MOTOR b) Auxiliary Code K-2 and L-0 GEAR MOTOR PROTECT RELAY CONTROL TIMER FLUSH SWITCH POWER SWITCH...

  • Page 9: C) Auxiliary Code L-1 And M-0

    c) Auxiliary Code L-1 and M-0 CONTROL TIMER FLUSH SWITCH POWER SWITCH CONTROL BOARD FUSE (1A) GEAR MOTOR FUSE (1.5A) TRANSFORMER d) Auxiliary Code M-1 and Later CONTROL TIMER FLUSH SWITCH POWER SWITCH CONTROL BOARD FUSE (1A) GEAR MOTOR FUSE (1.5A) BIN CONTROL SAFETY SWITCH LAMP...

  • Page 10: Timer Board

    D. Timer Board 1. Solid-State Timer Board Control • A HOSHIZAKI exclusive solid-state sequence timer board is employed in Hoshizaki self- contained flaker icemakers. • All models are pre-tested and factory-adjusted. 1. Fragile, handle very carefully. 2. The timer board contains CMOS (Complementary Metal-Oxide Semiconductor) integrated circuits, which are susceptible to failure due to static discharge.

  • Page 11: Sequence Of Operation

    E. Sequence of Operation Hoshizaki utilizes a solid state timer board to switch the components on and off as needed. The sequence is as follows: 1. Startup Flush switch in "ICE" position, power switch in "ON" position. FR energizes. 2. Fill Cycle WV opens and the reservoir fills with water until UF/S closes.

  • Page 13: Technical Information

    III. Technical Information A. Water Circuit and Refrigeration Circuit F-300BAF...

  • Page 14: Wiring Diagram

    B. Wiring Diagram 1. Auxiliary Code K-1 and Earlier F-300BAF...

  • Page 15: Auxiliary Code K-2 And L-0

    2. Auxiliary Code K-2 and L-0 F-300BAF...

  • Page 16: Auxiliary Code L-1 And M-0

    3. Auxiliary Code L-1 and M-0 F-300BAF...

  • Page 17: Auxiliary Code M-1 And Later

    4. Auxiliary Code M-1 and Later F-300BAF...

  • Page 18: Sequence Of Electrical Circuit

    C. Sequence of Electrical Circuit 1. Fill Cycle When power switch is moved to "ON" position, water is supplied to reservoir. F-300BAF...

  • Page 19: Ice Purge Cycle

    2. Ice Purge Cycle When reservoir has filled, gear motor starts. F-300BAF...

  • Page 20: Freeze Cycle

    3. Freeze Cycle Compressor and condenser fan motor start about 60 sec. after gear motor starts. F-300BAF...

  • Page 21: Shutdown

    4. Shutdown Compressor and condenser fan motor stop about 90 sec. after bin control operates, gear motor stops about 60 sec. later. Flush water valve then operates. F-300BAF...

  • Page 22: Cleaning - Flush Switch

    5. Cleaning - Flush Switch Compressor and condenser fan motor stop about 90 sec. after manually moving flush switch to FLUSH position. Gear motor stops about 60 sec. later. Flush water valve then operates. F-300BAF...

  • Page 23: Low Water Safety

    6. Low Water Safety If upper float switch fails to close, water valve remains open until upper float switch closes and water control relay energizes. F-300BAF...

  • Page 24: Spout Safety Switch

    7. Spout Safety Switch When saftey switch is activated, the safety switch relay operates, and the icemaker does not run. F-300BAF...

  • Page 25: High Pressure Switch

    8. High Pressure Switch In case of high pressure, pressure switch shuts down unit. F-300BAF...

  • Page 26: Performance Data

    D. Performance Data 1. F-300BAF APPROXIMATE ICE PRODUCTION PER 24 HR. lbs./day (kg/day) APPROXIMATE ELECTRIC CONSUMPTION watts APPROXIMATE WATER CONSUMPTION PER 24 HR. gal./day (l/day) EVAPORATOR OUTLET TEMP. °F (°C) HEAD PRESSURE PSIG (kg/cm²G) SUCTION PRESSURE PSIG ( kg/cm²G ) TOTAL HEAT OF REJECTION Note: The data without *marks should be used for reference.

  • Page 27: Service Diagnosis

    IV. Service Diagnosis A. Diagnostic Procedure This diagnostic procedure is a sequence check that allows you to diagnose the electrical system and components under normal operating conditions of 70°F or warmer air and 50°F or warmer water temperatures. Before proceeding, check for correct installation, proper voltage per unit nameplate and adequate water supply.
  • Page 28 5) Refill/Low Water Safety Cycle – As ice is produced, the water level in the reservoir drops. As it drops, the upper float switch and lower float switch open. The upper float switch opens first. Nothing occurs at this time. When the lower float switch opens, the refill begins.

  • Page 29: Diagnostic Charts

    B. Diagnostic Charts 1. No Ice Production Problem Possible Cause [1] The icemaker will not a) Power Supply start. (fill cycle, water valve) b) Power Switch (Control Box) c) High Pressure Switch d) Transformer e) Spout Safety Switch and Relay f) Fuse (Control Box) g) Bin Control h) Flush Switch...
  • Page 30 Problem Possible Cause j) Water Control Relay k) Water Valve l) Shut-off Valve m)Plug and Receptacle (Control Box) [2] Water does not stop, a) Float Switch and the gear motor will not start. b) Water Control Relay c) Flush Water Valve d) Hoses [3] Water has been a) Bin Control...

  • Page 31: Low Ice Production

    Problem Possible Cause e) Compressor f) Power Supply [5] Gear motor and a) Refrigerant Line compressor start, but no ice is produced. 2. Low Ice Production Problem Possible Cause [1] Low ice production. a)Refrigerant Line b)High-Side Pressure Too High c) Expansion Valve (not adjustable) Remedy 1.

  • Page 32: Other

    3. Other Problem Possible Cause [1] Abnormal noise a)Fan Motor b)Compressor c) Refrigerant Lines d)Gear Motor e)Evaporator [2] Overflow from a)Water Supply reservoir (water does not stop). b)Water Valve c) Float Switch d)Water Control Relay [3] Gear motor protector a)Power Supply Voltage operates frequently or fuse blows frequently.

  • Page 33: Removal And Replacement Of Components

    5) Disconnect the vacuum pump, and attach a refrigerant service cylinder to the high- side line. Remember to loosen the connection, and purge the air from the hose. See the nameplate for the required refrigerant charge. Hoshizaki recommends only virgin refrigerant or reclaimed refrigerant which meets ARI Standard No. 700-88 be used.

  • Page 34: Brazing

    8) If necessary, add any remaining charge to the system through the low-side. Use a throttling valve or liquid dispensing device to add the remaining liquid charge through the low-side access port with the unit running. 9) Close the two refrigerant access valves, and disconnect the service manifold hoses. 10) Cap the access valves to prevent a possible leak.

  • Page 35: Removal And Replacement Of Compressor

    C. Removal and Replacement of Compressor Always install a new drier every time the sealed refrigeration system is opened. Do not replace the drier until after all other repair or replacement has been made. Note: When replacing a compressor with a defective winding, be sure to install the new start capacitor and start relay supplied with the replacement compressor.

  • Page 36: Removal And Replacement Of Drier

    D. Removal and Replacement of Drier Always install a new drier every time the sealed refrigeration system is opened. Do not replace the drier until after all other repair or replacement has been made. 1) Unplug the unit from the electrical outlet. 2) Remove the panels.
  • Page 37 8) Check for leaks using nitrogen gas (140 PSIG) and soap bubbles. 9) Evacuate the system, and charge it with refrigerant. See the nameplate for the required refrigerant charge. 10) Attach the expansion valve bulb to the suction line in the same location as the previous bulb.

  • Page 38: Removal And Replacement Of Evaporator Assembly Components

    F. Removal and Replacement of Evaporator Assembly Components Make sure that the saftey switch and spout are properly installed after making repairs in the evaporator assembly. Failure to install the safety switch and spout correctly could result in serious damage to the unit. Safety Bracket A Safety Switch Drip Bracket...

  • Page 39: Upper Bearing Wear Check

    1. Upper Bearing Wear Check To ensure that the bearing inside the extruding head does not exceed the wear tolerance of .02", follow the instructions below. 1) Unplug the unit from the electrical outlet. 2) Remove the panels. 3) Remove the thumbscrews and take off the spout from the evaporator.

  • Page 40: Removal And Replacement Of Extruding Head

    3. Removal and Replacement of Extruding Head 1) Unplug the unit from the electrical outlet. 2) Remove the panels. 3) Remove the thumbscrews and take off the spout from the evaporator. 4) Loosen the cutter with a wrench and remove it. 5) Remove the allen head cap screws and lift off the extruding head.

  • Page 41: Removal And Replacement Of Mechanical Seal And Lower Housing

    4) Recover the refrigerant and store it in an approved container. 5) Remove the thumbscrews and take off the spout from the evaporator. 6) Disconnect the water hoses. 7) Remove the allen head cap screws securing the extruding head. Using the cutter, lift out the auger assembly.

  • Page 42: Removal And Replacement Of Gear Motor

    7) Remove the allen head cap screws securing the evaporator to the lower bearing housing. 8) Raise the evaporator up to access the lower housing. 9) Remove the O-ring and mechanical seal from the housing. If only replacing mechanical seal, proceed to step 12). To help prevent water leaks, be careful not to damage the surfaces of the O-ring or mechanical seal.

  • Page 43: Removal And Replacement Of Fan Motor

    10) Replace the panels in their correct positions. 11) Plug the unit back in. G. Removal and Replacement of Fan Motor 1) Unplug the unit from the electrical outlet. 2) Remove the panels. 3) Remove the wire connectors from the fan motor leads. 4) Remove the fan motor bracket and fan motor.
  • Page 44 8) Connect the hose to the water valve and secure it with the clamp. 9) Pour water into the reservoir, and check for water leaks. 10) Open the water supply line shut-off valve. 11) Plug the unit back in. 12) Move the flush switch to the "ICE" position. 13) Check for water leaks.

  • Page 45: Cleaning And Maintenance

    1. Cleaning Solution Dilute 4.8 fl. oz. (142 ml) of Hoshizaki "Scale Away" with 0.8 gallons (3 l) of warm water. This is a minimum amount. Make more solution if necessary. For safety and maximum effectiveness, use the solution immediately after dilution.

  • Page 46: Sanitizing Solution

    8) Remove the thumbscrews attaching spout (A) to the evaporator assembly and lift off spout (A) and spout packing (A). See Fig 4. 9) Pour the cleaning solution over the extruding head until the evaporator assembly and the reservoir are filled and the solution starts to overflow into the drain pan.

  • Page 47: Sanitizing Procedure - Initial

    4. Sanitizing Procedure - Initial 1) Close the water supply line shut-off valve. 2) In the storage bin, remove the thumbscrews attaching spout (B), then remove spout (B) and spout packing (B). 3) Remove the thumbscrews attaching spout (A) to the evaporator assembly and lift off spout (A) and spout packing (A), and the cylinder packing.
  • Page 48 8) Using the thumbscrews, replace spouts (A) and (B) and spout packings (A) and (B) in their correct positions. 9) Allow the icemaker to sit for about 10 minutes before operation. 10) Move the flush switch to the "ICE" position, then turn on the power supply. Replace the top panel and the front panel in their correct positions.

  • Page 49: Maintenance

    Lower Bearing Mechanical Seal Consult with your local distributor about inspection and maintenance service. To obtain the name and phone number of your local distributor, call Hoshizaki Technical Support at 1-800-233-1940. 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.

  • Page 50: Preparing The Icemaker For Long Storage

    C. Preparing the Icemaker for Long Storage When shutting off the icemaker 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 icemaker to prevent damage to the water supply line at sub-freezing temperatures, using air or carbon dioxide.

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