Manuals / Hoshizaki / Kitchen Appliance / Freezer

Hoshizaki HUR68A(-D) Rear, Front, Relay Wiring Harness K311, Thermistor Wiring Harness K151

Models: HWR68A(-D) HUR40A(-D) HUR68A(-D) HUR96A(-D) HWR40A(-D)

1 64

Download 64 pages 59.88 Kb

Page 22

2. Control Board Layout

2. Control Board Layout

Rear

K311 (6 pin)

Relay Wiring Board Part

Harness Number

Board Part

Number

Chip Revision

K251 (5 pin) (not used)

K101 (3 pin)

Transformer

K151 (10 pin)

Thermistor

Wiring

Harness

F101	K361 (9 pin)
3 Amp Fuse	(not used)
(not used)

Front

SW 135 SW 134

Display Raise

Setpoint Setpoint

LED 123

Lit for

Negative

Values

LED 124

Temperature

and Alarm

Display

Relays (not used)

SW 133

Lower

Setpoint

SW 132

Manual

Defrost

SW 131

Energy

Saving/

Service

Button

Note: Fuse at position F101 on board is not currently used. The board can function without this fuse.

Relay Wiring Harness (K311)

(brown) Compressor Relay

(red) Evaporator Fan Relay

(orange) Defrost Heater Relay

Thermistor Wiring Harness (K151)

(gray) Clogged Filter Sensor

(orange) Defrost Thermistor

(black) Cabinet Thermistor

(white) Jumper Wire (limits access to settings and diagnostics menu - not present on all units)

(light blue) High Pressure Switch

22

Image 22

Hoshizaki HUR68A(-D) Rear, Front, Relay Wiring Harness K311, Thermistor Wiring Harness K151, Control Board Layout

Contents

Commercial Refrigerators & Freezers Undercounter & Worktop Series SERVICE MANUALModels HoshizakiHoshizaki America, IncENERGY STAR CONTENTS 1. Alarm Display Priority III. Service DiagnosisA. Alarm Codes 2. Alarm Details and CountermeasuresUndercounter Model Names I. Specifications A. Nameplate RatingsB. Dimensions HUR96A-D, HWR96A-D1. HUR40A, HUF40A Units mm in 1a. HUR40A-D, HUF40A-D 2a. HWR40A-D, HWF40A-D 2. HWR40A, HWF40AUnits mm in 3a. HUR68A-D, HUF68A-D 3. HUR68A, HUF68AUnits mm in 4a. HWR68A-D, HWF68A-D 4. HWR68A, HWF68AUnits mm in 5a. HUR96A-D 5. HUR96A Units mm in6. HWR96A Units mm in 6a. HWR96A-D II. General Information A. Construction Evaporator Casea Sequence of Operation B. Sequence of Operation and Timing Charts1. Refrigerators - Continuous Operating Mode POWER ON Board Self CheckPower ON Timing ChartDefrost Indicator Time2. Freezers - Continuous Operating Mode a Sequence of OperationPower ON Timing ChartDefrost Indicator Time2-minute Delay 3. Refrigerators - Energy Saving Operating ModePOWER ON Board Self Check a Sequence of OperationPower ON Timing ChartDefrost Indicator Defrost Thermistor2-minute Delay 4. Freezers - Energy Saving Operating ModePOWER ON a Sequence of OperationPower ON Timing ChartDefrost Indicator Defrost Thermistor1. Start-Up Delay C. Control BoardRear Relay Wiring Harness K311Thermistor Wiring Harness K151 FrontD. Settings and Diagnostics 1. Gaining Access to Settings and Diagnosticsa Switching the Display Between Fahrenheit and Celsius F5 2. Temperature Displayb Adjusting the Setpoint Temperature c Cabinet Temperature Correction calibration factor Freezer 3. Settings and Diagnostics Menuearlier b Defrost Termination Temperature F1 a Defrost Interval F0c Setpoint Temperature Differential F2 e Low Temperature Alarm Delay Time F4 d High Temperature Alarm Delay Time F3Detection Time Alarm Code f Temperature Display Scale F5g Alarm History F6 Descriptionh Compressor Run Time F7 4. Operating Modesb Energy Saving E. Perimeter Frame Heatera Continuous c Automatic Corrections Made During Energy Saving Operating ModeIII. Service Diagnosis A. Alarm Codes 1. Alarm Display Priority Reset Options 2. Alarm Details and Countermeasuresa. High Temperature Alarm E1 Possible CausesReset Options b. Low Temperature Alarm E2Possible Causes Reset Options c. Defrost Alarm E3d. High Pressure Alarm E4 Reset OptionsReset Options e. Clogged Filter Alarm E7Possible Causes Reset Options f. Defrost Temperature Sensor Malfunction Alarm E8Possible Causes Reset Options g. Clogged Filter Sensor Malfunction Alarm E9Possible Causes h. Control Board Error Alarms EA and ED Reset OptionsPossible Cause B. Diagnosis ChartProblem RemedyPossible Cause ProblemRemedy Possible Cause ProblemRemedy C. Thermistor Check 1. Refrigerant Recovery IV. Removal and Replacement of ComponentsA. Service for Refrigerant Lines 2. Brazing3. Evacuation and Recharge B. Removal and Replacement of Refrigeration Unit C. Removal and Replacement of CompressorD. Removal and Replacement of Evaporator 10 Remove the evaporator and drier 5 Recover the refrigerant and store it in an approved container17 Plug in the unit, and turn on the power supply 11 Place the new evaporator and new drier in positionE. Removal and Replacement of Capillary Tube / Suction Line Assembly Defrost Thermistor F. Removal and Replacement of ThermistorsCabinet Thermistor Clogged Filter Thermistor sensorG. Removal and Replacement of Door Gasket H. Removal and Replacement of Defrost HeaterI. Removal and Replacement of Control Board Condenser Fan Motor J. Removal and Replacement of Fan MotorsK. Door Re-Hinging and Drawer Conversion Evaporator Fan Motor1. Stainless Steel Exterior V. Cleaning and Maintenance InstructionsA. Cleaning 2. Stainless Steel Interior6. Shelves B. Maintenance5. Air Filter 7. DrawersVI. Wiring Diagrams A1. HUR40A, HWR40A auxiliary code Q5 and earlier A2. HUR40A-D, HWR40A-D auxiliary code Q6 and later B. HUF40A-D, HWF40A-D C1. HUR68A, HWR68A auxiliary code Q5 and earlier C2. HUR68A-D, HWR68A-D auxiliary code Q6 and later D. HUF68A-D, HWF68A-D E. HUR96A-D, HWR96A-D