Hoshizaki JWE-620UA-6B No or Inadequate Detergent/Rinse Aid Supply, Wash Tank Water Boils

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5. No or Inadequate Detergent/Rinse Aid Supply

No or inadequate detergent/rinse aid supply

Problem

Detergent/Rinse Aid

Supply Line (Injector,

Vinyl Hose, Strainer)

Detergent Pump

Possible Cause

Empty.

Clogged or kinked.

Air in line.

Supply volume too low.

Remedy

Refill.

Clean or straighten.

Purge air.

Set to proper volume.

Defective.

Replace.

6. Wash Tank Water Boils

Wash tank water boils

Problem

Thermistor

Magnetic Contactor

Heater Control Relay

Control Board

Possible Cause

Out of position.

Disconnected (open).

Defective.

Contact fused.

Bad contacts.

Defective.

Remedy

Set in position.

Reconnect.

See “III.D.2. Thermistor Check.”

Replace.

Check for continuity and replace.

Replace.

Note: See “III.E. Thermistor Check” and “IV.M. Removal and Replacement of Thermistor.”

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Contents Model JWE-620UA-6B Hoshizaki AMERICA, INC Contents Page Important Safety Information Speciﬁcations Speciﬁcation Sheet DisplayNameplate Rating Dimensions/Connections II. General Information A. Construction DishwasherInternal Booster Tank Control Box Auxiliary Code U-1, U-2, U-3, V-0, A-0Auxiliary Code A-1 and Later Auto Fill lamp ﬂashing and RINSE, STANDARD, or Long lamp on Sequence of OperationAuto Fill Cycle Wash Cycle STANDBY/CLEANING Button Start Rinse CycleRinse lamp ﬂashing DrainSequence of Operation Flow Chart Auxiliary Code A-1 and Later Control Board and Operation Board Control Board LocationControl Board Layout CN5Control Board Diagram CN9X10 Ready Lamp Error CodesMode Lamps Auto Fill LampService Menu Access Mode ButtonSTANDBY/CLEANING Button Standby LampService Menu Chart Auxiliary Code U-1, U-2, U-3, V-0, A-0 DefaultService Menu Chart Auxiliary Code A-1 and Later Temperature Display Buzzer Error CodesInternal Booster Tank Energy Saving Mode Special ModesAlert Function Auxiliary Code A-1 and Later Continuous Wash ModeConsecutive Rinse Mode OFF Switch Open/Closed Display Mode III. Service DiagnosisDiagnostic Procedure Page Error Codes Error Code TableError Code Log Error Code Details Auto Fill Error A1Internal 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 ROM/RAM Error H5 Eeprom Error H6Phase Reversal Error H7 Service Flow Charts Unit Will Not StartPage Dishes Not Clean Page Inadequate Rinse Dishwasher Will Not Start When Door Closed No or Inadequate Detergent/Rinse Aid Supply Wash Tank Water BoilsWash Tank Water Not Draining Float Switch Cleaning Float Switch Check and CleaningFloat Switch Check Thermistor Check Removal of Panels IV. Removal and Replacement of ComponentsAccessing the Control Box 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 Unit Removal and Replacement of SpringAdjustment of Door Opening/Closing Force Removal and Replacement of Flush Pipe Packing Installation Instructions Removal and Replacement of Thermistor Operation Board Removal and Replacement of Control Board or Operation BoardControl Board Page Cleaning and Maintenance Instructions Daily Maintenance Pump Filter Water Level Sensor Location Front Self-Cleaning Weekly Maintenance Monthly InspectionDescaling As Required Shutdown Long Storage, Relocation, Disposal, Transfer VI. Operating Instructions VII. Technical Information Water Circuit Wiring Diagram Auxiliary Code U-1, U-2, U-3, V-0, A-0Auxiliary Code A-1 and Later