Hoshizaki HUR40A(-D), HWR40A(-D), HUR96A(-D), HUR68A(-D), HWR68A(-D) service manual Contents

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Please review this manual. It should be read carefully before the unit is serviced or maintenance operations are performed. Only qualified service technicians should service and maintain the unit. This manual should be made available to the technician prior to service or maintenance.

	CONTENTS
I. Specifications		5
A. Nameplate Ratings		5
B. Dimensions		5
1. HUR40A, HUF40A		6
1a. HUR40A-D, HUF40A-D		6
2. HWR40A, HWF40A		7
2a. HWR40A-D, HWF40A-D		7
3. HUR68A, HUF68A		8
3a. HUR68A-D, HUF68A-D		8
4. HWR68A, HWF68A		9
4a. HWR68A-D, HWF68A-D		9
5. HUR96A		10
5a. HUR96A-D		10
6. HWR96A		11
6a. HWR96A-D		11
II. General Information		12
A. Construction		12
B. Sequence of Operation and Timing Charts		13
1.	Refrigerators – Continuous Operating Mode	13
2.	Freezers – Continuous Operating Mode	15
3.	Refrigerators – Energy Saving Operating Mode	17
4.	Freezers – Energy Saving Operating Mode	19
C. Control Board		21
1.	Start-Up Delay	21
2.	Control Board Layout	22
D. Settings and Diagnostics		23
1.	Gaining Access to Settings and Diagnostics	23
2.	Temperature Display	24
	a) Switching the Display Between Fahrenheit and Celsius (F5)	24
	b) Adjusting the Setpoint Temperature	24
	c) Cabinet Temperature Correction (calibration factor)	25
3.	Settings and Diagnostics Menu	26
	a) Defrost Interval (F0)	27
	b) Defrost Termination Temperature (F1)	27
	c) Setpoint Temperature Differential (F2)	28
	d) High Temperature Alarm Delay Time (F3)	29
	e) Low Temperature Alarm Delay Time (F4)	29
	f) Temperature Display Scale (F5)	30
	g) Alarm History (F6)	30
	h) Compressor Run Time (F7)	31

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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