Hoshizaki F-300BAF service manual Sequence of Operation, Ice Production Check

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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. Note: GM will not start unless UF/S is closed. For details, see "IV. Service Diagnosis".

3. Ice Purge Cycle (60 seconds)

WCR energizes, closing the low water safety circuit and de-energizing WV. GMR energizes (clear relay located on TB). GM starts and GMPR energizes. GM runs for 60 seconds to clear any ice from the evaporator.

Note: Low water safety circuit is terminals 3 and 4 on TB.

4. Freeze Cycle (Ice Making Process)

CR energizes (black relay located on TB). Comp and FMS energize. As the water in the evaporator cools, ice starts forming within 4 to 6 minutes. This time frame depends on the inlet water and ambient temperature conditions.

UF/S and LF/S operate WV as needed to continue the ice making process. This continues until BC shuts the ice maker down or power is turned off to the unit.

5. Shutdown:

BC activates (opens). FR de-energizes, FWV energizes. Approximately 90 seconds after BC activates, Comp and FMS de-energize, one minute later GMPR de-energizes and GM stops.

Legend: BC–bin control; Comp–compressor; CR–compressor relay; FMS–self- contained fan motor; FR–flush relay; FWV–flush water valve; GM–gear motor; GMPR–gear motor protect relay; GMR–gear motor relay; LF/S–lower float switch; TB–timer board; UF/S–upper float switch; WCR–water control relay; WV–inlet water valve.

F. Ice Production Check

To check production, prepare a bucket or pan to catch the ice and a set of scales to weigh the ice. After the unit has operated for 10 to 20 minutes, catch the ice production for 10 minutes. Weigh the ice to establish the batch weight. Multiply the batch weight by 144 for the total production in 24 hours.

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Contents Self-Contained Flaker Model 300BAF Hoshizaki AMERICA, INC Contents Upper Bearing Wear Check 300BAF Specifications IcemakerII. General Information Construction Ice Making Unit Auxiliary Code K-2 and L-0 Control Box LayoutAuxiliary Code M-1 and Later Auxiliary Code L-1 and M-0Solid-State Timer Board Control Timer BoardIce Production Check Sequence of Operation300BAF, F-500BAF Sequence Flow Chart and Component Operation 300BAF Auxiliary Code K-1 and Earlier Wiring DiagramAuxiliary 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 ICE Production Performance DataIV. Service Diagnosis Diagnostic Procedure Page No Ice Production Diagnostic ChartsProblem Possible Cause Remedy Low Ice Production Other Evacuation and Recharge R-404A Removal and Replacement of ComponentsService for Refrigerant Lines Refrigerant RecoveryBrazing Removal and Replacement of Compressor Removal and Replacement of Expansion Valve Removal and Replacement of DrierPage Removal and Replacement of Evaporator Assembly Components Upper Bearing Wear Check Removal and Replacement of CutterRemoval and Replacement of Evaporator Removal and Replacement of Extruding HeadRemoval and Replacement of Auger Page Removal and Replacement of Gear Motor 6b. Lower HousingRemoval and Replacement of Flush Water Valve Removal and Replacement of Fan MotorRemoval and Replacement of Inlet Water Valve Page Cleaning Procedure VI. Cleaning and MaintenanceCleaning and Sanitizing Instructions Cleaning SolutionSanitizing Solution Sanitizing Procedure Final Sanitizing Procedure InitialPage Air Filter MaintenanceStainless Steel Exterior Storage Bin and ScoopPreparing the Icemaker for Long Storage
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