Hoshizaki 73180 service manual Optional Drain Pump HS-0248, Overview, Drain Pump Check

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E. Optional Drain Pump HS-0248

1. Overview

As ice melts, water drains from the storage bin into DP. When DP's LF/S closes, DP energizes and pumps out the water. If water cannot be pumped out of DP due to a blocked discharge hose, bad check valve, or bad DP motor, the water level rises and UF/S closes. When UF/S closes, DP safety activates and unit shuts down. DP safety interrupts power to icemaker components until UF/S opens. Power is supplied to DP motor as long as LF/S is closed.

For schematics, see "III.B.2. Icemaker with Optional Drain Pump HS-0248."

NOTICE

•If you remove DP from the icemaker and/or remove the reservoir cover, be sure to follow all instructions below. Failure to do so may result in costly water damage.

•DP has an external or internal check valve. If DP contains an internal check valve, do not install an external check valve and vice versa. See Fig. 6.

Legend: DP–drain pump; LF/S–lower float switch; UF/S–upper float switch

External Check Valve

Fig. 6

2. Drain Pump Check

Internal Check Valve

If the optional DP (HS-0248) is installed, test its operation at least twice a year as outlined below. Note that DP has power even when the power switch is in the "OFF" position.

NOTICE

If DP is not primed or is otherwise not operating properly, it will adversely affect performance, component life, and warranty coverage and may result in costly water damage.

1)Move the power switch to the "OFF" position, then unplug the unit from the electrical outlet. WARNING! To reduce the risk of electric shock, do not touch the power switch or plug with damp hands.

2)Remove all ice from the storage bin.

3)Plug the unit back in.

4)Slowly pour 16 to 24 oz. (500 to 750 ml) of water over the storage bin drain hole in the storage bin.

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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 Auxiliary Codes Rear II. General Information ConstructionFront 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 SeriesIV. Service Diagnosis Diagnostic ProcedureIce Production Check Page Auxiliary Codes A-2 and Later Bin Control Check Float Switch Check Float Switch Cleaning Lower Float white Plastic Retainer ClipOptional Drain Pump HS-0248 OverviewDrain Pump Check Priming Instructions Float Switch Cleaning Diagnostic Charts No Ice Production Possible Cause StartupShutdown Fill Cycle and Refill Cycle Shutdown Removal and Replacement of Components Service for Refrigerant LinesRefrigerant 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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