Hoshizaki HUR40A(-D) User Manual

Hoshizaki“A Superior Degreeof Reliability”www.hoshizaki.comModelsRefrigeratorsHUR40A(-D) HWR40A(-D)HUR68A(-D) HWR68A(-D)HUR96A(-D) HWR96A(-D)FreezersH

105. HUR96A5a. HUR96A-DUnits: mm (in.)

116a. HWR96A-D6. HWR96AUnits: mm (in.)

1Compressor 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." ) 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,

IMPORTANTOnly qualied service technicians should attempt to service or maintain this unit. No such service or maintenance should be undertaken until

0b) Timing ChartFreezers – Energy Saving Operating Mode nehw yaled pu trats naf rotaropave dnoceseviFNOFFONOFFO)+( laitnereffiD + tniopteS)--( laitne

1C. Control Board• A Hoshizaki exclusive solid-state control board is employed in all Hoshizaki refrigerators and freezers.• All models are pretested

2. Control Board LayoutNote: Fuse at position F101 on board is not currently used. The board can function without this fuse.SW 135 Display SetpointS

3D. Settings and DiagnosticsVarious settings and diagnostic information can be controlled via the display panel. The display panel is located behind

42. Temperature Display• Displays the cabinet temperature. The factory setting is °F. To change the display to the °C scale, see "a) Switching t

5c) Cabinet Temperature Correction (calibration factor)In cases where there is a discrepancy between the actual cabinet center temperature and the di

6Code Item Setting and Display RangeDefaultRefrigerator FreezerAuxiliary Code1section2sectionQ5 andearlierQ6 andlaterF0 Defrost Interval 1 to 1 hour

7a) 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

83) Press the unmarked, blank button to display the current setting. Press the up or down button to increase or decrease the defrost termination

9d) 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. Specications ... 5A. Na

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

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

3Model Setpoint TemperatureOff Time (seconds)On Time (seconds) Refrigerator3 to 30°F(-5 to -1°C)90 153 to 5°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, "E&

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

4B. 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.) Remove the front panel, then remove the wire gu

491) Turn off the power supply, and unplug the unit.) 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

5F. Removal and Replacement of Thermistors1) Turn off the power supply, and unplug the unit.) 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.) 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.

6CAUTIONBefore diagnosing and/or servicing the unit, conrm that you have the proper wiring diagram by checking against the diagram located inside th

63CAUTIONBefore diagnosing and/or servicing the unit, conrm that you have the proper wiring diagram by checking against the diagram located inside th

64CAUTIONBefore diagnosing and/or servicing the unit, conrm 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