Hoshizaki JWE-620UA-6B service manual Contents

Page 3

IMPORTANT

This manual should be read carefully before the unit is serviced or maintenance operations are performed. Only qualified service technicians should install, service, and maintain the unit. Read the warnings contained in this booklet carefully as they give important information regarding safety. Please retain this booklet for any further reference that may be necessary.

 

CONTENTS

 

I. Specifications ------------------------------------------------------------------------------------------------

1

A. Specification Sheet -------------------------------------------------------------------------------------

1

B. Nameplate Rating ---------------------------------------------------------------------------------------

2

C. Dimensions/Connections------------------------------------------------------------------------------

3

II. General Information----------------------------------------------------------------------------------------

4

A. Construction ----------------------------------------------------------------------------------------------

4

1.

Dishwasher --------------------------------------------------------------------------------------------

4

2.

Internal Booster Tank -------------------------------------------------------------------------------

5

3.

Control Box --------------------------------------------------------------------------------------------

6

B. Sequence of Operation --------------------------------------------------------------------------------

8

1. Auto Fill Cycle-----------------------------------------------------------------------------------------

8

2.

Ready Cycle (Unit Inactive) -----------------------------------------------------------------------

9

3.

Wash Cycle--------------------------------------------------------------------------------------------

9

4.

Rinse Cycle-------------------------------------------------------------------------------------------

10

5.

Drain----------------------------------------------------------------------------------------------------

11

C. Sequence of Operation Flow Chart----------------------------------------------------------------

12

D. Control Board and Operation Board---------------------------------------------------------------

14

1.

Control Board Location ----------------------------------------------------------------------------

14

2.

Control Board Layout ------------------------------------------------------------------------------

15

3.

Control Board Diagram ----------------------------------------------------------------------------

16

4.

Operation Panel Layout ---------------------------------------------------------------------------

18

5.

Features-----------------------------------------------------------------------------------------------

18

6.

Controls, Adjustments, and Lamps -------------------------------------------------------------

18

7.

Service Menu and Error Log ---------------------------------------------------------------------

19

8.

Temperature Display -------------------------------------------------------------------------------

22

9.

Error Codes ------------------------------------------------------------------------------------------

23

10.

Buzzer -------------------------------------------------------------------------------------------------

23

11. Special Modes ---------------------------------------------------------------------------------------

23

III. Service Diagnosis ----------------------------------------------------------------------------------------

26

A. Diagnostic Procedure ---------------------------------------------------------------------------------

26

B. Error Codes----------------------------------------------------------------------------------------------

28

1.

Error Code Table ------------------------------------------------------------------------------------

28

2.

Error Code Log --------------------------------------------------------------------------------------

29

3.

Error Code Details ----------------------------------------------------------------------------------

30

C. Service Flow Charts -----------------------------------------------------------------------------------

39

1.

Unit Will Not Start -----------------------------------------------------------------------------------

39

2.

Dishes Not Clean -----------------------------------------------------------------------------------

41

 

i

 

Page 2 Page 4
Image 3
Page 2 Page 4
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
Top Page Image Contents