Hoshizaki JWE-620UA-6B service manual Error Codes, Error Code Table

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B. Error Codes

In the event of operation outside of normal parameters, the control board identiﬁes the issue with an error code. For further service information, see "III.C. Service Flow Charts."

1. Error Code Table

Error	Problem	Operation	Reset
Code	Problem	Operation	Reset
	Wash Tank Auto Fill Error	Unit stops	Use "ON/OFF" button to turn the unit
A1	Water level in wash tank does not reach		off and then back on.
A1	Water level in wash tank does not reach
	water level sensor after rinse pump has
	run preset number of cycles.
	Internal Booster Tank Auto Fill Error	Whole unit	Use "ON/OFF" button to turn the unit
	In auto ﬁll cycle, internal booster tank	stops	off and then back on.
A2	In auto ﬁll cycle, internal booster tank
A2	water level ﬂoat switch does not close
	water level ﬂoat switch does not close
	within 10 minutes after inlet water valve is
	opened.
	Wash Tank Water Level Error	Auto ﬁll cycle	After auto ﬁll cycle ends, alarm resets.
A3	Water level in wash tank goes below	starts
A3	Water level in wash tank goes below
	water level sensor in "READY" mode or in
	"STANDBY."
	Internal Booster Tank Water Level Error 1	Normal	Use "ON/OFF" button to turn the unit
	(Internal Booster Tank Water Level Float	(internal	off and then back on.
	Switch Closed)	booster tank
o1	Both internal booster tank water level ﬂoat	heaters off)
o1

	switch and internal booster tank backup
	water level ﬂoat switch have remained
	closed for 1 minute.
	Internal Booster Tank Water Level Error 2	Normal	Use "ON/OFF" button to turn the unit
	(Internal Booster Tank Water Level Float	(internal	off and then back on.
	Switch Open)	booster tank
o2	Internal booster tank water level ﬂoat	heaters off)
o2

	switch is open and internal booster
	tank backup water level ﬂoat switch has
	remained closed for 1 minute.
	Wash Tank Thermistor Error (short)	Normal	After replacing failed component,
H1		(wash tank	alarm resets.
H1	Thermistor senses abnormal temperature	heaters off)
	Thermistor senses abnormal temperature	heaters off)
	(at or above 231°F (110°C)).
	Wash Tank Thermistor Error (open)	Normal	After replacing failed component,
H2		(wash tank	alarm resets.
H2	Thermistor senses abnormal temperature	heaters off)
	Thermistor senses abnormal temperature	heaters off)
	(at or below -6°F (-21°C)).
	Internal Booster Tank Thermistor Error	Normal	After replacing failed component,
	(short)	(internal	alarm resets.
H3		booster tank
	Thermistor senses abnormal temperature	heaters off)
	(at or above 231°F (110°C)).

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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 Mode Lamps Error CodesReady Lamp Auto Fill LampSTANDBY/CLEANING Button Mode ButtonService Menu Access Standby LampDefault 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 Internal Booster Tank Energy Saving Mode Error CodesBuzzer Special ModesContinuous 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