Hoshizaki HUR68A(-D), HWR40A(-D), HUR96A(-D) Perimeter Frame Heater, Continuous, Energy Saving

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a)Continuous

The evaporator fan runs constantly (except in defrost). The frame heaters are on continuously.

b)Energy Saving

The evaporator fan runs when the compressor is on, but only intermittently when the compressor is off. The frame heaters cycle on and off with the evaporator fan for refrigerators auxiliary code Q6 and later, but are on continuously for refrigerators auxiliary code Q5 and earlier and all freezers. Intermittent fan operation saves energy by reducing heat leak, especially around the gasket, and by extending compressor off time. Fan on/off time is dependent on the setpoint temperature.

			Off Time	On Time
	Model	Setpoint Temperature	(seconds)	(seconds)
		23 to 30°F	90	15
		(-5 to -1°C)	90	15
	Refrigerator	(-5 to -1°C)
	Refrigerator	32 to 52°F	150	15
		32 to 52°F
		(0 to 11°C)
		(0 to 11°C)
	Freezer	-13 to +19°F	30	30
	Freezer	(-25 to -7°C)	30	30
		(-25 to -7°C)

c) Automatic Corrections Made During Energy Saving Operating Mode

(1) Temperature Display Correction

When the unit is in energy saving mode and the evaporator fan shuts off, the temperature at the cabinet thermistor drops due to its close proximity to the evaporator. Therefore, the temperature at the cabinet thermistor does not accurately reflect the true cabinet temperature. To compensate for this, the cabinet temperature registered at compressor shutoff is displayed for 120 seconds after shutoff when in energy saving mode. After 120 seconds, the cabinet temperature plus 1.8°F (1°C) will be displayed. Once the compressor turns back on, the display will return to the normal display.

(2) Temperature Differential Correction

During energy saving mode, the cabinet temperature tends to be higher than during normal operation because the evaporator fan operates only intermittently when the compressor is off. The upper setpoint differential for turning the compressor on is automatically adjusted to compensate.

E. Perimeter Frame Heater

This unit is equipped with a perimeter frame heater. This prevents the formation of condensate on the front frame of the unit under high humidity conditions.

Note: On refrigerators with auxiliary code Q6 and later, perimeter frame heater(s) operate together with the evaporator fan(s).

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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