Hoshizaki HUR68A(-D), HWR40A(-D) Defrost Interval F0, Defrost Termination Temperature F1

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a)Defrost Interval (F0)

This unit is preset at the factory to defrost once every 6 hours for general conditions. However, if it is determined that this interval does not suit actual conditions, the interval can be changed. To change the defrost interval, follow the steps below.

1)Make sure the jumper is removed between connector K151 pins 7 and 8 on the control board. Otherwise you will not be able to access this setting. For details, see "D.1. Gaining Access to Settings and Diagnostics."

2)Press and hold both the button and the unmarked, blank button for 5 seconds. If "F0" is not displayed, press the MANUAL DEFROST button until "F0" appears in the display window.

3)Press the unmarked, blank button to display the current setting (default: "6"). Press

the up or down button to increase or decrease the number of hours between each defrost. The interval can be from 1 to 12 hours in increments of 1 hour.

4)Press the unmarked, blank button to save the setting.

5)Press the MANUAL DEFROST button to return to the menu screen. Press and hold

both the button and the unmarked, blank button for 5 seconds to exit the setting mode and return to the temperature display.

6)If a jumper was present between connector K151 pins 7 and 8 , reconnect it after all setting and diagnostic work is complete.

Note:

•The defrost is a heated defrost, and therefore has a tendency to raise cabinet temperature.

•When the unit goes into defrost during energy saving mode, evaporator fan(s) and/or perimeter frame heaters will turn off.

•Cabinet temperature is not displayed during defrost; "dF" is displayed in its place.

•The change in the defrost setting will take effect immediately. The next defrost will take place after the newly set time interval has elapsed.

•Initiating a manual defrost will restart the defrost timer.

•The evaporator temperature must be below the defrost completion temperature for any defrost (manual or auto) to be initiated.

b)Defrost Termination Temperature (F1)

To change the defrost termination temperature, follow the steps below.

1)Make sure the jumper is removed between connector K151 pins 7 and 8 on the control board. Otherwise you will not be able to access this setting. For details, see "D.1. Gaining Access to Settings and Diagnostics."

2)Press and hold both the button and the unmarked, blank button for 5 seconds. "F0" should appear in the display window. Press the MANUAL DEFROST button until "F1" appears in the display window.

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Contents Superior Degree Reliability Energy Star Contents Page Specifications Nameplate Ratings DimensionsUndercounter Model Names HUR40A, HUF40A Units mm 1a. HUR40A-D, HUF40A-D 2a. HWR40A-D, HWF40A-D HWR40A, HWF40A3a. HUR68A-D, HUF68A-D HUR68A, HUF68A4a. HWR68A-D, HWF68A-D HWR68A, HWF68AHUR96A Units mm 5a. HUR96A-D HWR96A Units mm 6a. HWR96A-D Evaporator Case II. General Information ConstructionSequence of Operation and Timing Charts Refrigerators Continuous Operating ModeSequence of Operation Operating Timing ChartFreezers Continuous Operating Mode Freezers Continuous Defrost End Defrost thermistor reaches defrost Refrigerators Energy Saving Operating ModeEnergy Board Self Check Minute Delay Freezers Energy Saving Operating ModeFreezers Energy Control Board Start-Up DelayFront Relay Wiring Harness K311Thermistor Wiring Harness K151 RearGaining Access to Settings and Diagnostics Settings and DiagnosticsTemperature Display Switching the Display Between Fahrenheit and Celsius F5Adjusting the Setpoint Temperature Cabinet Temperature Correction calibration factor Later Section Settings and Diagnostics MenuDefrost Interval F0 Defrost Termination Temperature F1Setpoint Temperature Differential F2 Low Temperature Alarm Delay Time F4 High Temperature Alarm Delay Time F3Alarm History F6 Temperature Display Scale F5Operating Modes Compressor Run Time F7Perimeter Frame Heater ContinuousEnergy Saving Alarm Signals Alarm Code Problem III. Service Diagnosis Alarm CodesError Code Priority Description Alarm Display PriorityPossible Causes Alarm Details and CountermeasuresHigh Temperature Alarm E1 Reset OptionsLow Temperature Alarm E2 High Pressure Alarm E4 Defrost Alarm E3Clogged Filter Alarm E7 Defrost Temperature Sensor Malfunction Alarm E8 Clogged Filter Sensor Malfunction Alarm E9 Control Board Error Alarms EA and ED Problem Possible Cause Remedy Diagnosis ChartProblem Possible Cause Remedy Problem Possible Cause Remedy Thermistor Check Brazing IV. Removal and Replacement of ComponentsService for Refrigerant Lines Refrigerant RecoveryEvacuation and Recharge Removal and Replacement of Compressor Removal and Replacement of Refrigeration UnitRemoval and Replacement of Evaporator Page Page Clogged Filter Thermistor sensor Removal and Replacement of ThermistorsCabinet Thermistor Defrost ThermistorRemoval and Replacement of Defrost Heater Removal and Replacement of Door GasketRemoval and Replacement of Control Board Evaporator Fan Motor Removal and Replacement of Fan MotorsDoor Re-Hinging and Drawer Conversion Condenser Fan MotorCleaning Cleaning and Maintenance InstructionsDrawers MaintenanceAir Filter Shelves115/60/1 A2. HUR40A-D, HWR40A-D auxiliary code Q6 and later HUF40A-D, HWF40A-D C1. HUR68A, HWR68A auxiliary code Q5 and earlier C2. HUR68A-D, HWR68A-D auxiliary code Q6 and later HUF68A-D, HWF68A-D HUR96A-D, HWR96A-D