Hoshizaki JWE-620UA-6B service manual Repair or replace Replace

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e)Internal Booster Tank Water Level Error 2 (Internal Booster Tank Water Level Float Switch Open) (o2)

•If the internal booster tank water level ﬂoat switch is open and the internal booster tank backup water level ﬂoat switch has remained closed for 1 minute, the internal booster tank heaters de-energize, "o2" appears in the display, and the buzzer sounds.

•The error resets if the internal booster tank backup water level ﬂoat switch opens or when the "ON/OFF" button is used to turn the unit off and then back on.

•See the chart below for possible causes and remedies.

Code

o 2

Error

Internal booster tank water level float switch is open and internal booster tank backup water level switch has remained closed for 1 minute.

Operation

Continues (internal

booster tank heater off).

Item

Internal Booster Tank

Water Level Float

Switch

Internal Booster Tank

Backup Water Level

Float Switch

Possible Cause

Sticking.

Open circuit.

Defective.

Sticking.

Remedy

Check and clean. See “III.D. Float Switch Check and Cleaning.”

Repair or replace.

Replace.

Check and clean. See “III.D. Float Switch Check and Cleaning.”

Defective.

Replace.

Control Board

Connector not properly connected.

Reconnect.

Defective.

Replace.

Note: See “III.D. Float Switch Check and Cleaning.”

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Contents Model JWE-620UA-6B Hoshizaki AMERICA, INC Contents Page Important Safety Information Display Speciﬁcations Speciﬁcation SheetNameplate Rating Dimensions/Connections Dishwasher II. General Information A. ConstructionInternal Booster Tank Auxiliary Code U-1, U-2, U-3, V-0, A-0 Control BoxAuxiliary Code A-1 and Later Sequence of Operation Auto Fill CycleAuto Fill lamp ﬂashing and RINSE, STANDARD, or Long lamp on Wash Cycle Rinse Cycle STANDBY/CLEANING Button StartDrain Rinse lamp ﬂashingSequence of Operation Flow Chart Auxiliary Code A-1 and Later Control Board Location Control Board and Operation BoardCN5 Control Board LayoutCN9 Control Board DiagramX10 Auto Fill Lamp Error CodesMode Lamps Ready LampStandby Lamp Mode ButtonSTANDBY/CLEANING Button Service Menu AccessDefault Service Menu Chart Auxiliary Code U-1, U-2, U-3, V-0, A-0Service Menu Chart Auxiliary Code A-1 and Later Temperature Display Special Modes Error CodesInternal Booster Tank Energy Saving Mode BuzzerContinuous Wash Mode Consecutive Rinse ModeAlert Function Auxiliary Code A-1 and Later OFF III. Service Diagnosis Diagnostic ProcedureSwitch Open/Closed Display Mode Page Error Code Table Error CodesError Code Log Auto Fill Error A1 Error Code DetailsInternal Booster Tank Auto Fill Error A2 Wash Tank Water Level Error A3 Defective Replace Control Board Repair or replace Replace Wash Tank Thermistor Error H1, H2 Internal Booster Tank Thermistor Error H3, H4 Eeprom Error H6 ROM/RAM Error H5Phase Reversal Error H7 Unit Will Not Start Service Flow ChartsPage Dishes Not Clean Page Inadequate Rinse Dishwasher Will Not Start When Door Closed Wash Tank Water Boils No or Inadequate Detergent/Rinse Aid SupplyWash Tank Water Not Draining Float Switch Check and Cleaning Float Switch CheckFloat Switch Cleaning Thermistor Check IV. Removal and Replacement of Components Accessing the Control BoxRemoval of Panels Page Removal and Replacement of Internal Booster Tank Removal and Replacement of Wash Pump Motor Removal and Replacement of Rinse Pump Motor Removal and Replacement of Handle Removal and Replacement of Door Removal and Replacement of Spring Removal and Replacement of Spring UnitAdjustment of Door Opening/Closing Force Removal and Replacement of Flush Pipe Packing Installation Instructions Removal and Replacement of Thermistor Removal and Replacement of Control Board or Operation Board Control BoardOperation Board Page Cleaning and Maintenance Instructions Daily Maintenance Pump Filter Water Level Sensor Location Front Self-Cleaning Monthly Inspection Weekly MaintenanceDescaling As Required Shutdown Long Storage, Relocation, Disposal, Transfer VI. Operating Instructions VII. Technical Information Water Circuit Auxiliary Code U-1, U-2, U-3, V-0, A-0 Wiring DiagramAuxiliary Code A-1 and Later