Hoshizaki “A Superior Degree of Reliability” www.hoshizaki.com Models Refrigerators HUR40A(-D) HWR40A(-D) HUR68A(-D) HWR68A(-D) HUR96A(-D) HWR96A(-D)
105. HUR96A5a. HUR96A-DUnits: mm (in.)
116a. HWR96A-D6. HWR96AUnits: mm (in.)
12Compressor BaseCondenser Fan MotorFront PanelEvaporator Case CoverControl BoxCompressorSide PanelEvaporator CaseCapillary Tube/Suction Line Assembly
13Note: 1) Cut-on, cut-off, and cabinet temperature are read by the same sensor, called the "cabinet thermistor." 2) The defrost thermistor
14b) Timing ChartRefrigerators – Continuous Operating ModeNOFFONOFFOFFONONOFFO)+( laitnereffiD + tniopteS)--( laitnereffiD + tniopteSgninaem oNNOFFONO
152. Freezers – Continuous Operating Mode a) Sequence of OperationNote: 1) Cut-on, cut-off, and cabinet temperature are read by the same sensor, cal
16b) Timing ChartFreezers – Continuous Operating ModeNOFFONOFFO)+( laitnereffiD + tniopteS)--( laitnereffiD + tniopteSgninaem oNFFONONOFFONOFFONOFFOot
173. Refrigerators – Energy Saving Operating Mode a) Sequence of OperationNote: 1) Cut-on, cut-off, and cabinet temperature are read by the same se
18b) Timing ChartRefrigerators – Energy Saving Operating ModeNOFFONOFFO)+( laitnereffiD + tniopteS)--( laitnereffiD + tniopteSgninaem oNFFONONOFFONOFF
194. Freezers – Energy Saving Operating Mode a) Sequence of OperationNote: 1) Cut-on, cut-off, and cabinet temperature are read by the same sensor,
2IMPORTANTOnly qualied service technicians should attempt to service or maintain this unit. No such service or maintenance should be undertaken until
20b) Timing ChartFreezers – Energy Saving Operating Mode nehw yaled pu trats naf rotaropave dnoceseviFNOFFONOFFO)+( laitnereffiD + tniopteS)--( laitne
21C. Control Board•AHoshizakiexclusivesolid-statecontrolboardisemployedinallHoshizakirefrigerators and freezers.•Allmodelsarepretested
222. Control Board LayoutNote: Fuse at position F101 on board is not currently used. The board can function without this fuse.SW 135 Display SetpointS
23D. Settings and DiagnosticsVarious settings and diagnostic information can be controlled via the display panel. The display panel is located behind
242. Temperature Display•Displaysthecabinettemperature.Thefactorysettingis°F.Tochangethedisplaytothe°C scale, see "a) Switching t
25c) Cabinet Temperature Correction (calibration factor)In cases where there is a discrepancy between the actual cabinet center temperature and the di
26Code Item Setting and Display RangeDefaultRefrigerator FreezerAuxiliary Code1section2sectionQ5 andearlierQ6 andlaterF0 Defrost Interval 1 to 12 hour
27a) 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 t
283) Press the unmarked, blank button to display the current setting. Press the up or down button to increase or decrease the defrost termination
29d) High Temperature Alarm Delay Time (F3)To change the high temperature alarm delay time, follow the steps below.1) Make sure the jumper is removed
3CONTENTSI. Specications ... 5A. N
304) 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 b
31h) Compressor Run Time (F7)To display the compressor run time between the two most recent defrosts, follow the steps below.1) Make sure the jumper i
32Model Setpoint TemperatureOff Time (seconds)On Time (seconds) Refrigerator23 to 30°F(-5 to -1°C)90 1532 to 52°F(0 to 11°C)150 15Freezer-13 to +19°F(
33III. Service DiagnosisA. Alarm CodesIf an error occurs, the alarm code and cabinet temperature are displayed in 1-second intervals. See the table be
341. Alarm Display PriorityIf multiple alarms occur simultaneously, only the alarm with the higher priority is displayed.Error Code Priority Descripti
352. Alarm Details and Countermeasuresa. High Temperature Alarm (E1)If the cabinet temperature exceeds the setpoint temperature by 14.4°F (8°C) or mor
36b. Low Temperature Alarm (E2)If the cabinet temperature drops below the setpoint temperature by 9°F (5°C) or more for more than y minutes, "E2&
37c. Defrost Alarm (E3)If the defrost thermistor does not turn off in one hour after defrost begins, "E3" is displayed. When "E3"
38e. Clogged Filter Alarm (E7)The unit is equipped with a lter for protecting the condenser from dirt, oils, grease, etc. The lter promotes clean co
39f. Defrost Temperature Sensor Malfunction Alarm (E8)If input from the defrost thermistor is below the defrost open circuit detection point (equivale
44. Operating Modes ... 31a) Continuous ...
40g. Clogged Filter Sensor Malfunction Alarm (E9)If the input from the clogged lter sensor is below the clogged lter sensor open circuit detection p
41h. Control Board Error Alarms (EA and ED)"EA" is displayed when an EEPROM write error is detected. "ED" is displayed when an EEP
42B. Diagnosis ChartProblem Possible Cause Remedy[1] Compressor will not start—no current draw.a)Power Supply 1. "OFF" position. 1. Move to
43Problem Possible Cause Remedy[5] Cabinet temperature too high.a)Setpoint and/or Differential1. Incorrect. 1. Correct setting(s). See sections "
44Problem Possible Cause Remedy[9] Defrost cycle lasts too long. a)Defrost Thermistor 1. Defective. 1. Replace.b)Control Board 1. Defective. 1. Rep
45C. Thermistor CheckA thermistor (semiconductor) is used for the cabinet control sensor and defrost termination sensor. The resistance varies dependi
46IV. Removal and Replacement of ComponentsIMPORTANT1. Ensure all components, fasteners, and thumbscrews are securely in place after the equipment is
471) Always install a new drier every time the sealed refrigeration system is opened. Do not replace the drier until after all other repair or replace
48B. Removal and Replacement of Refrigeration Unit1) Turn off the power supply, and unplug the unit.2) Remove the front panel, then remove the wire gu
491) Turn off the power supply, and unplug the unit.2) Remove the front panel, then remove the wire guard located below the display panel.3) Unhook th
5Undercounter Model NamesThe undercounter models covered in this service manual initially had different model names. If you have a unit with an auxili
504) Very carefully slide out the refrigeration system. Support the evaporator as it clears the evaporator case.5) Recover the refrigerant and store i
51E. Removal and Replacement of Capillary Tube / Suction Line AssemblyIMPORTANTAlways install a new drier every time the sealed refrigeration system i
52F. Removal and Replacement of Thermistors1) Turn off the power supply, and unplug the unit.2) Remove the front panel, then remove the wire guard loc
53G. Removal and Replacement of Door GasketRemove old gasket by pulling it directly out of the vinyl gasket retainer. Thoroughly clean the gasket area
54I. Removal and Replacement of Control BoardIMPORTANTWhen receiving a service call, please ask the customer to turn the power off, then turn it back
55J. Removal and Replacement of Fan Motors1) Turn off the power supply, and unplug the unit.2) Remove the front panel, then remove the wire guard loca
56V. Cleaning and Maintenance InstructionsWARNING1. Do not splash water directly onto the unit. This might cause short circuit, electric shock, corros
575. Air FilterAs the air lter becomes clogged with dirt or dust, the unit’s performance will be reduced. Do not operate the unit with the air lter
58VI. Wiring Diagrams A1. HUR40A, HWR40A (auxiliary code Q5 and earlier)Note: Jumper (color: white) between pins 7 and 8 of connector K151 may not be
59A2. HUR40A(-D), HWR40A(-D) (auxiliary code Q6 and later)Note: Jumper (color: white) between pins 7 and 8 of connector K151 may not be present on al
6Units: mm (in.)1a. HUR40A-D, HUF40A-D1. HUR40A, HUF40A
60B. HUF40A(-D), HWF40A(-D)Note: Jumper (color: white) between pins 7 and 8 of connector K151 may not be present on all units, but this will not adver
61Note: Jumper (color: white) between pins 7 and 8 of connector K151 may not be present on all units, but this will not adversely affect performance.
62CAUTIONBefore diagnosing and/or servicing the unit, conrm that you have the proper wiring diagram by checking against the diagram located inside th
63CAUTIONBefore diagnosing and/or servicing the unit, conrm that you have the proper wiring diagram by checking against the diagram located inside th
64CAUTIONBefore diagnosing and/or servicing the unit, conrm that you have the proper wiring diagram by checking against the diagram located inside th
72. HWR40A, HWF40AUnits: mm (in.) 2a. HWR40A-D, HWF40A-D
83. HUR68A, HUF68AUnits: mm (in.)3a. HUR68A-D, HUF68A-D
94. HWR68A, HWF68AUnits: mm (in.)4a. HWR68A-D, HWF68A-D
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