Hoshizaki F-300BAF service manual 300BAF, F-500BAF Sequence Flow Chart and Component Operation

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1. Startup

F-300BAF, F-500BAF Sequence Flow Chart and Component Operation

Flush switch in "ICE" Power switch "ON"

1. Fill Cycle 2. Ice Purge Cycle

60 sec. timer

3. Icemaking Cycle

 

 

 

 

 

Refill Cycle

 

 

 

 

 

 

UF/S closes terminating

LF/S opens

 

 

 

90 sec TC.

 

 

 

If refill > 90 sec. TC

initiating refill

 

 

 

 

 

 

 

 

 

 

 

 

 

and 90 sec. TC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4. Low Water Safety

If refill achieved, icemaking cycle starts and timers are reset.

90 sec. timer 60 sec. timer

FR energized WCR de-energized WV energized

Low water safety ciruit closed. (Terminals 3 and 4 on timer board)

 

 

 

UF/S open

LF/S closed

 

 

 

 

 

 

 

 

UF/S open

 

 

 

 

 

Comp energized

 

 

GM de-energized

 

 

LF/S open

UF/S closed

 

 

 

 

90 sec. TC exceeded

 

 

LF/S closed

FMS energized

90 sec. TC started

90 sec. TC ended

Comp de-energized GMPR de-energized

WCR de-energized

UF/S closed

WCR continues

WCR de-energized

WCR energized

WV continues

FMS de-energized

WV continues

FR continues

WCR energized

GM continues

WV energized

WV de-energized

Comp continues

WV continues

 

WV de-energized

GMPR continues

Comp continues

Comp continues

GM continues

GM continues

 

GM energized

FR continues

GM continues

GM continues

FMS continues

GMPR continues

 

GMPR energized

 

FMS continues

FMS continues

GMPR continues

FR continues

 

FR continues

 

GMPR continues

GMPR continues

FR continues

 

 

 

 

 

 

FR continues

FR continues

 

 

 

 

 

 

 

 

 

 

 

2. Shutdown & Restart

1. Bin control proximity switch

2. Compressor and fan motor

opens to stop ice production.

de-energize, gear motor

 

continues running.

3. Gear motor de-energizes and unit is "OFF"

4. Bin control proximity switch closes. Reservoir fills. LF/S and UF/S close. Gear motor starts 6.7 seconds later.

5. Compressor and fan motor energize. Ice production begins in 4

12

Bin control operation

 

 

90 seconds

 

 

 

 

60 seconds

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6.7 sec.

60 seconds

to 6 minutes.

BC open

Comp de-energized

FR de-energized

FMS de-energized

WCR de-energized

GM continues

FWV energized

GMPR continues

Comp continues

FWV continues

FMS continues

 

GM continues

 

GMPR continues

 

GM de-energized GMPR de-energized FWV continues

BC closed

LF/S and UF/S close

Comp energized

FR energized

WCR energized

FMS energized

WV energized

WV de-energized

GM continues

FWV de-energized

GM energized

GMPR continues

 

GMPR energized

WCR continues

 

FR continues

FR continues

Legend:

BC - bin control Comp - compressor

FMS - self-contained fan motor FR - flush relay

FWV - flush water valve GM - gear motor

GMPR - gear motor protect relay LF/S - lower float switch

TC - timer control UF/S - upper float switch WCR - water control relay WV - inlet water valve

Components Energized when the Flush Switch is in the FLUSH Position

The FLUSH position is used when cleaning and sanitizing the machine. When in the FLUSH position, power is supplied to the flush valve. This allows cleaner and sanitizer to drain from the evaporator assembly.

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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 Removal and Replacement of Components Service for Refrigerant LinesRefrigerant Recovery 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 Extruding Head Removal and Replacement of AugerRemoval and Replacement of Evaporator Page 6b. Lower Housing Removal and Replacement of Gear MotorRemoval and Replacement of Fan Motor Removal and Replacement of Inlet Water ValveRemoval and Replacement of Flush Water Valve Page VI. Cleaning and Maintenance Cleaning and Sanitizing InstructionsCleaning Solution Cleaning ProcedureSanitizing Solution Sanitizing Procedure Initial Sanitizing Procedure FinalPage Maintenance Stainless Steel ExteriorStorage Bin and Scoop Air FilterPreparing the Icemaker for Long Storage