Manuals / Hoshizaki / Kitchen Appliance / Dishwasher

Hoshizaki JWE-24000CUA-L-25B service manual Dishes Not Clean, Dish Rack Dishes Continue, Prewash

Models: JWE-2400CUA-R-25B JWE-24000CUA-L-25B

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2. Dishes Not Clean

Dishes not clean

Problem

Low Wash Pump

Output

Wash Spray Arms

Filter

Dish Rack

Dishes

Continue

Possible Cause

Clogged with foreign matter.

Voltage drop.

Vapor lock due to clogged tank filter.

Vapor lock due to use of neutral cleaner.

Wash pump defective.

Clogged.

Out of position.

Low pump output.

Out of position.

Clogged

Improperly loaded.

Excessively dirty.

Remedy

Clean.

Remove cause.

Clean tank filter.

Stop using neutral cleaner.

Replace.

Clean.

Set in position.

See “Low Wash Pump Output”.

Place in position.

Clean.

Load correctly.

Prewash.

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Hoshizaki JWE-24000CUA-L-25B Dishes Not Clean, Dishes not clean Problem Low Wash Pump Output Wash Spray Arms Filter

Contents

NO. J002-794 ISSUED APR. 1 REVISED SEP MODEL JWE-2400CUA-L-25B JWE-2400CUA-R-25BDISHWASHER HOSHIZAKIComplete and detailed explanation of the problem HOSHIZAKI AMERICA, INC 618 Highway 74 South Peachtree City, GAAttn Hoshizaki Technical Support Department Phone 1-800-233-1940 Technical Support 770 487-2331 FaxCONTENTS III. Service Diagnosis A. Diagnostic ProcedureB. Error Codes Error Code TableImportant Safety Information Indicates a hazardous situation which could result in death orserious injury Indicates a situation which could result in damage to the unit orNUMBER OF LARGE DISHES / RACK Thermistor Control 182ºF83ºC-185ºF 85ºCThermistor Control 163ºF73㩷C - 168㩷㪝76C DISHWASHER SIDE B. Nameplate Rating For certiﬁcation marks, see the nameplate on the dishwasherC. Dimensions/Connections 1. JWE-2400CUA-L-25B2. JWE-2400CUA-R-25B Units mm inII. General Information A. Construction 1. DishwasherWash Spray Arm stationary Wash Start Switch Service Panel Switch Vertically Sliding Service Panel Rack Flow Water Level Sensor2. Booster Tank Water Level Float Switch FS1 downward endBackup Water Level Float Switch FS2 upward end Water Level Safety Float Switch FS3 downward end Thermistor TH2X11 Service Panel Switch X12 Phase Reversal RelayX14 Conveyor Drive Signal Voltage Tap SwitchB. Functions C. Sequence of Operation1. Increasing Rinse Water Flow Rate 1. Auto Fill Cycle2. Ready Cycle Unit Inactive READY lamp and RINSE TEMP. or WASH TEMP. lamp on3. Wash Cycle/Rinse Cycle WASH lamp and RINSE TEMP. or WASH TEMP. lamp on4. Table Limit Switch 5. Emergency Stop Button6. Drain Flow Chart Dishwasher Sequence Flow Chart JWE-2400CUA-25BD. Sequence of Operation Cycle StepsChart E. Timing1. Auto Fill Cycle2. Wash Cycle/Rinse Cycle Delay Time 0.5 secExtended Wash Cycle Time *30 sec Extended Rinse Cycle Time *15 secF. Control Board and Operation Board 1. Control Board Location2. Control Board Layout 3. Control Board Diagram 200VAC from Transformer5. Features b Service Menu and Error Logc Error Codes 6. Controls, Adjustments, and Lampsi Conveyor Speed Switch 7. Service Menu and Error Loga Service Menu Access c READY Lampb Service Menu Chart Setting RangeItem and Details Display8. Temperature Display 9. Error Codes10. Buzzer b Low Water Temperature Lock Function 11. Operation Time Display12. Special Modes a Continuous Wash ModeAlert Function Setting Flow Service Menufactory default Set service menus 17 toIII. Service Diagnosis A. Diagnostic ProcedureSwitch Open/Closed Display Mode 1 Use the “ON/OFF” button on the operation panel to turn off the unit 2 Pull out the overﬂow pipe to drain the wash tank3 Drain the booster tank through the drain hose 4 Replace the overﬂow pipe and drain hose in their correct positionsB. Error Codes 1. Error Code TableError Problem2. Error Code Log 3. Error Code Details a Auto Fill Error A1Continue Booster Tank Water Level Float Switch Check and clean. See “III.D. Float Switch Check and Cleaning.”Sticking with float in “ON” position Defective with internal contacts in “ON” positionb Booster Tank Auto Fill Error A2 c Wash Tank Water Level Error A3 Page Page f Wash Tank Thermistor Error H1, H2 H 1 / Hg Booster Tank Thermistor Error H3, H4 H 3 / Hh ROM/RAM Error H5 i EEPROM Error H6j Conveyor Overload or Table Limit Error 1 L1 k Conveyor Overload or Table Limit Error 2 L2 l Booster Tank Error b1 m Booster Tank Water Level Safety Error b2 C. Service Flow Charts 1. Unit Will Not StartUnit will not start Problem Main Power Supply Emergency Stop Button ON/OFF Button Power Failure No Water Supply Service PanelContinue Transformer Wiring to Control Board Control Board Open coil winding Loose connections or open In alarm DefectiveSee “III.B. Error Codes.” Replace Replace2. Dishes Not Clean Dishes not clean Problem Low Wash Pump Output Wash Spray Arms FilterRemedy Clean Remove cause Clean tank filter Stop using neutral cleaner Replace Clean Set in positionTemperature too low Temperature will not rise Control output error Refill or adjust detergent feeder Use specified detergent onlyRaise setting or see “Heater Not Energized” Reset overheat thermostat Check input/output and repair or replace Replace Reset manually3. Inadequate Rinse Inadequate rinse Problem Low Rinse Pump Output Rinse Spray ArmsLow pump output Improperly loaded Temperature too low Too short Remedy Clean Clean Remove cause Replace Clean Set in position4. Dishwasher Will Not Start Wash/Rinse Cycle Dishwasher will not start wash/rinse cycle5. No or Inadequate Detergent/Rinse Aid Supply 6. Wash Tank Water BoilsNo or inadequate detergent/rinse aid supply Problem Supply volume too low7. Wash Tank Water Not Draining Wash tank water not draining Problem Drain Hose Drain PipeOverflow Pipe Possible Cause Clogged Pinched Raised CloggedD. Float Switch Check and Cleaning 1. Float Switch Check2. Float Switch Cleaning E. Thermistor Check IV. Removal and Replacement of Components B. Removal and Replacement of Wash Pump MotorsA. Removal of Panels C. Removal and Replacement of Rinse Pump Motor 6 Disconnect the rinse pump motor wiring at the closed end connectors JWE-2400CUA-L-25B View without rinse pump motor BandBooster Tank Discharge PipeD. Removal and Replacement of Gear Motor Bracket Wash Tank Flinger Coupling Hexagon Socket Set Screw NutGear Motor Bracket Bolt E. Removal and Replacement of Conveyor F. Removal and Replacement of Crankshaft G. Removal and Replacement of Control Box H. Removal and Replacement of ThermistorI. Removal and Replacement of Control Board or Operation Board 1. Control Board2. Operation Board Connector Tube B Operation Board Tube AStay - OP Joint - Operation B Operation Panel B Cable - Operation J. Removal and Replacement of Heater K. Removal and Replacement of Float Switch L. Removal and Replacement of Thermostat V. Cleaning and Maintenance Instructions A. Daily Maintenance 7 Remove the separators 14 Replace the separators in their correct positions Hook Rack Rail Ring21 Install the curtain L in the wash compartment B. Weekly Maintenance C. Monthly Inspection1. Heater 2. ExteriorD. Descaling As Required E. Shutdown2 Turn off the water heater 3 Turn off the gas and water supplies F. Long Storage, Relocation, Disposal, Transfer VI. Operating InstructionsVII. Technical Information A. Water Circuit B. Wiring Diagram