Hoshizaki KM-1301SWH-E, KM-1301SRH-E, KM-1301SAH-E service manual Float Switch Cleaning

Page 44

2. Float Switch Cleaning

Depending on local water conditions, scale may build up on the float switch. Scale on the switch can cause the float to stick. In this case, the float switch should be cleaned.

1)Turn off the power supply.

2)Remove the front panel, then move the control switch to the "OFF" position.

3)Remove the insulation panel, then remove the drain plug located on the lower front part of the ice chute. See Fig. 3. Allow the water tank to drain.

4)Replace the drain plug in its correct position. Be careful not to cross thread it.

5)Disconnect the vent tube and the flush tube from the top of the float switch, then remove the float switch assembly from the mounting bracket and remove the rubber boot from the bottom of the float switch assembly. See Fig. 4.

6)Remove the retainer rod from the bottom of the float switch assembly, then remove the float. Be careful not to bend the retainer rod excessively when removing it.

7)Wipe down the float switch assembly's housing, shaft, float, and retainer rod with a mixture of 1 part Hoshizaki "Scale Away" and 25 parts warm water. Clean the inside of the rubber boot and hose with cleaning solution. Rinse the parts thoroughly with clean water.

8)Reassemble the float switch assembly and replace it and the rubber boot in their correct positions. Reconnect the vent tube and the flush tube.

9)Move the control switch to the "ICE" position.

10)Replace the insulation panel and front panel in their correct positions.

11)Turn on the power supply to start the automatic icemaking process.

 

Vent

 

Flush

 

Shaft

Fig. 4

Float Switch

 

Housing

Float

Retainer Rod

Rubber Boot

and Hose

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Contents Superior Degree Reliability Hoshizaki AMERICA, INC Contents Page Important Safety Information Serious injuryIndicates important information about the use and care UnitSpecifications Icemaker KM-1301SAH-E air-cooledKM-1301SWH-E water-cooled KM-1301SRH-E remote air-cooled Condenser Unit URC-14FESpecifications II. General Information Construction KM-1301SWH-E water-cooled Separators Sequence of Operation Sequence Cycles and ShutdownMinute Fill Cycle Initial Harvest CycleS4 Dip Switch Setting Pump-Out 1st Pump-Out Frequency Freeze CyclePump-Out Cycle Harvest CycleMechanical Bin Control KM-1301SWH-E, KM-1301SRH-E Cycle at Shutdown Mechanical Bin Control ActivationSequence Flow Chart Cycle Steps Minute Fill Harvest CyclePump-Out Cycle Mechanical BC Bin Full Shutdown and RestartControl Board Control Board Layout Control BoardLED Lights and Audible Alarm Safeties No. of Beeps Type of Alarm Every 3 secSequence Step Time LEDs are OnHarvest Timer S4 dip switch 1 Controls and AdjustmentsDefault Dip Switch Settings Time seconds Inlet Pump-Out Timer S4 dip switch 3Pump-Out Frequency Control S4 dip switch 5 Harvest Pump Timer S4 dip switch Factory Use S4 dip switchFreeze Timer S4 dip switch 9 S4 Dip Switch Setting Pump Motor Time secondsRefill Counter S5 dip switch 2 through Control SwitchFloat Switch Control S5 dip switch Tank Water Tank Headmaster Service Drier Valve Thermistor Wiring Diagrams Auxiliary Code T-0, U-0KM-1301SAH-E air-cooled U-0 Auxiliary CodeAuxiliary Code U-1 and Later PressureSwitch KM-1301SRH-E remote air-cooled Performance Data 1330 12401780 13351270 11421950 2070IV. Service Diagnosis Diagnostic ProcedurePage S4 Dip Switch Setting Pump-Out 1st Pump-Out Frequency Shutdown Thermostatic Bin Control KM-1301SAH-E Mechanical Bin Control KM-1301SWH-E, KM-1301SRH-EControl Board Check Mechanical Bin Control Check Bin Control CheckThermostatic Bin Control Check KM-1301SAH-E Single Unit Connection Detail Stacked Unit Connection DetailMechanical Bin Control Cleaning Float Switch Check and Cleaning Float Switch CheckFloat Switch Cleaning Adjustment of Water Regulating Valve water-cooled model Thermistor CheckNo Ice Production Possible Cause Diagnostic ChartsNo Ice Production No Ice Production Possible Cause Freeze Up Freeze Up Possible Cause Harvest CycleFreeze Up Possible Cause Freeze Cycle Long Freeze Cycle Low Ice ProductionLow Ice Production Possible Cause Long Harvest Cycle Refrigerant Recovery Replacement of ComponentsService for Refrigerant Lines Brazing Evacuation and Recharge R-404APage Important Notes for Component Replacement ComponentVI. Cleaning and Maintenance Cleaning ProcedureIce Chute Float Switch Assembly Drain Plug Sanitizing Procedure Following Cleaning Procedure Maintenance Remove the water from the icemaker water supply lineDrain the water tank