Hoshizaki 73180 service manual Float Switch Check

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D. Float Switch Check and Cleaning (auxiliary codes A-2 and later)

1.Float Switch Check

1)Move the power switch to the "OFF" position, then unplug the unit from the electrical outlet.

2)Remove the upper rear panel. See Fig. 4.

3)Remove the clamp securing the drain plug, then lower the drain hose into a container. Remove the drain plug to drain the water from the evaporator assembly and reservoir.

4)After all of the water has drained, replace the drain hose, drain plug, and drain clamp in their correct positions.

5)Remove the front panel and louver. Remove the screws securing the control box, then gently pull out the control box. Remove the control box cover.

6)At WCR, check continuity between terminal #8 common (BK wire) and terminal #6 UF/S (R wire). Next, check continuity between terminal #8 common (BK wire) and terminal #4 LF/S (BU wire). If both are open, continue to step 7. If either are closed, follow the steps in "IV.D.2. Float Switch Cleaning." After cleaning F/S, check UF/S and LF/S again.

Replace if necessary.

7)Plug the unit into the electrical outlet, then move the power switch to the "ON" position and let the reservoir fill.

8)Once the reservoir is full and GM starts, move the power switch to the "OFF" position.

9)Unplug the unit from the electrical outlet.

10)At WCR, check continuity between terminal #8 common (BK wire) and terminal #6 UF/S (R wire). Next, check continuity between terminal #8 common (BK wire) and terminal #4 LF/S (BU wire). If both are closed, continue to step 11. If either are open, follow the steps in "IV.D.2. Float Switch Cleaning." After cleaning F/S, check UF/S and LF/S again.

Replace if necessary.

11)Make sure F/S wires are properly connected to WCR, then replace the control box cover and control box in their correct positions.

12)Replace the removed parts and panels in the reverse order of which they were removed.

13)Plug the unit into the electrical outlet, then move the power switch to the "ON" position to start the automatic icemaking process.

Legend: GM–gear motor; LF/S–lower float switch; UF/S–upper float switch; WCR–water control relay

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Contents 100BAF-DS 100BAF-AD 100BAF-ADDS Hoshizaki AMERICA, INC Contents Page Important Safety Information Page Specifications 100BAF Auxiliary Codes A-1 and EarlierAuxiliary Codes A-2 and Later 100BAF-DS 100BAF-DS, 2. Auxiliary Codes A-2 and Later 100BAF-AD 100BAF-AD, 2. Auxiliary Codes A-2 and Later 100BAF-ADDS 100BAF-ADDS, 2. Auxiliary Codes A-2 and Later II. General Information Construction FrontAuxiliary Codes Rear Auxiliary CodesIcemaking Unit Sequence of Operation Freeze CycleFill Cycle Auxiliary Codes A-1 and Earlier Auxiliary Codes A-2 and Later Wiring Diagram Auxiliary Codes A-2 and LaterIcemaker with Optional Drain Pump HS-0248 Performance Data 100BAF SeriesDiagnostic Procedure IV. Service DiagnosisIce Production Check Page Auxiliary Codes A-2 and Later Bin Control Check Float Switch Check Float Switch Cleaning Lower Float white Plastic Retainer ClipOverview Optional Drain Pump HS-0248Drain Pump Check Priming Instructions Float Switch Cleaning Diagnostic Charts No Ice Production Possible Cause StartupShutdown Fill Cycle and Refill Cycle Shutdown Service for Refrigerant Lines Removal and Replacement of ComponentsRefrigerant Recovery Brazing Evacuation and Recharge R-134aImportant Notes for Component Replacement ComponentRemoval and Replacement of Evaporator Assembly Components Upper Bearing Wear Check Removal and Replacement of Extruding Head Removal and Replacement of Auger Removal and Replacement of Evaporator Page 5b. Lower Housing Page VI. Maintenance Maintenance Schedule Frequency Area TaskCleaning and Sanitizing Instructions Cleaning SolutionPage Sanitizing Solution Page Cleaning Solution Page Sanitizing Solution Storage Bin Drain Condenser VII. Preparing the Icemaker for Periods of Non-Use Auxiliary Codes A-1 and Earlier Skip to stepVIII. Disposal
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