Hoshizaki HUR68A(-D), HWR40A(-D), HUR96A(-D), HUR40A(-D) Maintenance, Air Filter, Shelves, Drawers

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5. Air Filter

As the air filter becomes clogged with dirt or dust, the unit’s performance will be reduced. Do not operate the unit with the air filter removed. This will accelerate clogging of the condenser and result in failure. Check the filter at least twice each month. If it is dirty, use warm water and a neutral cleaner to wash the filter. To avoid damaging the air filter, do not use water hotter than 104°F (40°C). The filter is located behind the front panel. This filter can be removed by opening the front panel and lifting the filter away from the condenser. Reinstall the filter after cleaning.

6. Shelves

Remove and clean regularly.

7. Drawers

On units with drawers, the drawers can be removed for cleaning either individually or as an entire assembly.

•To remove an individual drawer, first remove all food product from the drawer. Pull the drawer out to its fully extended position and lift up on the handle to disengage the drawer. Before removing the drawer, carefully support the rear and front of the drawer and then slowly remove it from the cabinet.

•To remove the drawer frame assembly, first remove the drawers and then remove the fasteners in the thermal break and in the rear of the cabinet. Carefully slide the frame out of the cabinet, making sure not to damage the thermal break. Reinstall in the reverse order, making sure not to overtighten the screws in the thermal break.

•To remove the drawer slide (center slide containing rollers) for cleaning, rotate the top

of the slide away from the frame while the slide is completely inside the cabinet. Drawer slides do not require lubrication, but slides should be kept clean and free of food.

Note: Drawer slides are dishwasher safe.

B. Maintenance

1. Air Filter

The air filter promotes clean condenser surfaces and efficient unit operation by removing dirt and grease from circulating air. The filter should be checked monthly and cleaned when necessary—as described in "A.5. Air Filter".

All other maintenance or service on this unit should be performed in accordance with the Hoshizaki Service Manual by a qualified service technician.

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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 DelayThermistor Wiring Harness K151 Relay Wiring Harness K311Rear FrontGaining 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 PriorityHigh Temperature Alarm E1 Alarm Details and CountermeasuresReset Options Possible CausesLow 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 Service for Refrigerant Lines IV. Removal and Replacement of ComponentsRefrigerant Recovery BrazingEvacuation and Recharge Removal and Replacement of Compressor Removal and Replacement of Refrigeration UnitRemoval and Replacement of Evaporator Page Page Cabinet Thermistor Removal and Replacement of ThermistorsDefrost Thermistor Clogged Filter Thermistor sensorRemoval and Replacement of Defrost Heater Removal and Replacement of Door GasketRemoval and Replacement of Control Board Door Re-Hinging and Drawer Conversion Removal and Replacement of Fan MotorsCondenser Fan Motor Evaporator Fan MotorCleaning Cleaning and Maintenance InstructionsAir Filter MaintenanceShelves Drawers115/60/1 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