Hoshizaki F-300BAF service manual Solid-State Timer Board Control

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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.

CAUTION

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. It is especially important to use an anti-static wrist strap when handling or replacing the board.

3.Do not touch the electronic devices on the board or the back of the board to prevent damage to the board.

4.Do not change wiring and connections. Especially, never misconnect terminals.

5.Do not fix the electronic devices or parts on the board in the field. Always replace the whole board assembly if it goes bad.

The timer board provides the following safeguards:

•Provides component protection during low water supply.

•Purges remaining ice in the evaporator.

•Provides short cycle protection for the compressor.

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Contents Self-Contained Flaker Model 300BAF Hoshizaki AMERICA, INC Contents Upper Bearing Wear Check Specifications Icemaker 300BAFII. General Information Construction Ice Making Unit Control Box Layout Auxiliary Code K-2 and L-0Auxiliary Code L-1 and M-0 Auxiliary Code M-1 and LaterTimer Board Solid-State Timer Board ControlSequence of Operation Ice Production Check300BAF, F-500BAF Sequence Flow Chart and Component Operation 300BAF Wiring Diagram Auxiliary Code K-1 and EarlierAuxiliary Code K-2 and L-0 Auxiliary Code L-1 and M-0 Auxiliary Code M-1 and Later Sequence of Electrical Circuit Ice Purge Cycle Freeze Cycle Shutdown Cleaning Flush Switch Low Water Safety Spout Safety Switch High Pressure Switch Performance Data ICE ProductionIV. Service Diagnosis Diagnostic Procedure Page Diagnostic Charts No Ice ProductionProblem Possible Cause Remedy Low Ice Production Other Refrigerant Recovery Removal and Replacement of ComponentsService for Refrigerant Lines Evacuation and Recharge R-404ABrazing Removal and Replacement of Compressor Removal and Replacement of Drier Removal and Replacement of Expansion ValvePage Removal and Replacement of Evaporator Assembly Components Removal and Replacement of Cutter Upper Bearing Wear CheckRemoval and Replacement of Auger Removal and Replacement of Extruding HeadRemoval and Replacement of Evaporator Page 6b. Lower Housing Removal and Replacement of Gear MotorRemoval and Replacement of Inlet Water Valve Removal and Replacement of Fan MotorRemoval and Replacement of Flush Water Valve Page Cleaning Solution VI. Cleaning and MaintenanceCleaning and Sanitizing Instructions Cleaning ProcedureSanitizing Solution Sanitizing Procedure Initial Sanitizing Procedure FinalPage Storage Bin and Scoop MaintenanceStainless Steel Exterior Air FilterPreparing the Icemaker for Long Storage