Hoshizaki JWE-620UA-6B service manual Phase Reversal Error H7

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j) Phase Reversal Error (H7)

•If a phase reversal error is detected, the unit shuts down, "H7" appears in the display, and the buzzer sounds.

•After correcting the connection, the alarm resets.

•See the chart below for possible causes and remedies.

Code

H 7

Error

Power supply phase is reversed.

Item

Electrical Connection

Possible Case

Connected in wrong positions.

Operation

Unit stops.

Remedy

Swap two of three wires at power switch (GFCI) connection.

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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 Auto Fill Cycle Sequence of OperationAuto 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 BuzzerConsecutive Rinse Mode Continuous Wash ModeAlert Function Auxiliary Code A-1 and Later OFF Diagnostic Procedure III. Service DiagnosisSwitch 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 Float Switch Check and CleaningFloat Switch Cleaning Thermistor Check Accessing the Control Box IV. Removal and Replacement of ComponentsRemoval 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 Control Board Removal and Replacement of Control Board or Operation 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