Hoshizaki HWR68A(-D), HWR40A(-D), HUR96A(-D), HUR68A(-D), HUR40A(-D) Problem Possible Cause Remedy

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Problem	Possible Cause		Remedy
[9] Defrost cycle	a)Defrost Thermistor	1. Defective.	1. Replace.
lasts too long.	b)Control Board	1. Defective.	1. Replace.
	c) Defrost	1. Not enough defrosts	1. Factory default is once every
		occurring per day.	6 hours. If coil is frosting too
		Operation in humid	much, can shorten defrost
		conditions.	interval.
	d)Defrost Heater	1. Defective.	1. Replace heaters.
	e)Safety Defrost	1. Defective, turning off	1. Replace safety defrost
	Thermostat	heaters prematurely,	thermostat.
		or fused open.
[10]Condensate	a)Cabinet Contents	1. Loading of large	1. Cover product with plastic
water overflow.		volumes of warm,	wrap.
		moist, uncovered
		product.
	b)Location of Unit	1. Unit located near high	1. Relocate.
		humidity source such
		as fryer, steamer, etc.
	c) Seals	1. Poor sealing around	1. Adjust or replace.
		evaporator, door
		gaskets.
	d)Environment	1. Extreme environment	1. Adjust conditions.
		and door-opening
		conditions.
[11]Abnormal Noise	a)Fasteners	1. Loose fasteners allow	1. Tighten fasteners.
		vibration of part.
	b)Compressor	1. Problem with mount.	1. Properly mount compressor.
			Replace any missing
			grommets.
		2. Floodback to	2. Check for signs of floodback
		compressor.	to compressor. Evacuate and
			recharge if necessary.
		3. Defective.	3. Replace.
	c) Fan	1. Fan blade loose.	1. Adjust and tighten.
		2. Defective motor.	2. Replace.
	d) Relay	1. Chattering.	1. Replace.

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Contents Superior Degree Reliability Energy Star Contents Page Undercounter Model Names Specifications Nameplate RatingsDimensions HUR40A, HUF40A Units mm 1a. HUR40A-D, HUF40A-D HWR40A, HWF40A 2a. HWR40A-D, HWF40A-DHUR68A, HUF68A 3a. HUR68A-D, HUF68A-DHWR68A, HWF68A 4a. HWR68A-D, HWF68A-DHUR96A Units mm 5a. HUR96A-D HWR96A Units mm 6a. HWR96A-D II. General Information Construction Evaporator CaseSequence of Operation Sequence of Operation and Timing ChartsRefrigerators Continuous Operating Mode Timing Chart OperatingFreezers Continuous Operating Mode Freezers Continuous Refrigerators Energy Saving Operating Mode Defrost End Defrost thermistor reaches defrostEnergy Freezers Energy Saving Operating Mode Board Self Check Minute DelayFreezers Energy Start-Up Delay Control BoardRelay Wiring Harness K311 Thermistor Wiring Harness K151Rear FrontSettings and Diagnostics Gaining Access to Settings and DiagnosticsAdjusting the Setpoint Temperature Temperature DisplaySwitching the Display Between Fahrenheit and Celsius F5 Cabinet Temperature Correction calibration factor Settings and Diagnostics Menu Later SectionDefrost Termination Temperature F1 Defrost Interval F0Setpoint Temperature Differential F2 High Temperature Alarm Delay Time F3 Low Temperature Alarm Delay Time F4Temperature Display Scale F5 Alarm History F6Compressor Run Time F7 Operating ModesEnergy Saving Perimeter Frame HeaterContinuous III. Service Diagnosis Alarm Codes Alarm Signals Alarm Code ProblemAlarm Display Priority Error Code Priority DescriptionAlarm Details and Countermeasures High Temperature Alarm E1Reset Options Possible CausesLow Temperature Alarm E2 Defrost Alarm E3 High Pressure Alarm E4Clogged Filter Alarm E7 Defrost Temperature Sensor Malfunction Alarm E8 Clogged Filter Sensor Malfunction Alarm E9 Control Board Error Alarms EA and ED Diagnosis Chart Problem Possible Cause RemedyProblem Possible Cause Remedy Problem Possible Cause Remedy Thermistor Check IV. Removal and Replacement of Components Service for Refrigerant LinesRefrigerant Recovery BrazingEvacuation and Recharge Removal and Replacement of Refrigeration Unit Removal and Replacement of CompressorRemoval and Replacement of Evaporator Page Page Removal and Replacement of Thermistors Cabinet ThermistorDefrost Thermistor Clogged Filter Thermistor sensorRemoval and Replacement of Door Gasket Removal and Replacement of Defrost HeaterRemoval and Replacement of Control Board Removal and Replacement of Fan Motors Door Re-Hinging and Drawer ConversionCondenser Fan Motor Evaporator Fan MotorCleaning and Maintenance Instructions CleaningMaintenance Air FilterShelves 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