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

Page 43

Problem

Possible Cause

 

Remedy

[5]

Cabinet

a)Setpoint and/or

1. Incorrect.

1. Correct setting(s).

 

temperature too

Differential

 

See sections "II.D.2.b)" and

 

high.

 

 

"II.D.3.c)" for defaults.

 

 

b)Door

1. Not sealing, opened

1. Check for sealing, check for

 

 

 

frequently or open for

door open at time of warm

 

 

 

long intervals.

cabinet temperature.

 

 

c) Defrost

1. Defrost time

1. See "[8] Evaporator does

 

 

 

insufficient to remove

not defrost completely."

 

 

 

frost.

 

 

 

 

Operation in humid

 

 

 

 

conditions.

 

 

 

d)Refrigerant

1. Leak.

1. Repair leak and recharge.

 

 

e)Fan Motor

1. Defective.

1. Check and replace.

 

 

f) Air Filter

1. Clogged.

1. Clean.

 

 

g)Condenser

1. Dirty.

1. Clean.

 

 

h)Thermistor

1. Defective.

1. Check and replace.

 

 

 

 

 

 

 

i) Control Board

1. Defective.

1. Replace.

 

 

j) Outside Heat Source

1. Too close to unit.

1. Separate unit from heat

 

 

 

 

source.

 

 

k) Air Flow

1. Blockage inside

1. Remove blocakge by removing

 

 

 

interior.

or redistributing food product.

 

 

l) Warm Food

1. Warm food recently

1. Allow time for unit to return to

 

 

 

placed in refrigerator.

setpoint temperature.

[6]

Cabinet

a)Power Supply

1. "OFF" position.

1. Move to "ON" position.

 

temperature

 

2. Loose connection(s).

2. Tighten or reconnect.

 

display

 

 

 

 

 

3. Failure or tripped

3. Call electrician and/or reset

 

indicator does

 

 

 

breaker.

breaker.

 

not illuminate

 

 

b)Control Board

1. Defective.

1. Replace.

 

properly.

 

 

 

 

[7]

Cabinet

a)Setpoint and/or

1. Incorrect.

1. Correct setting(s).

 

temperature too

Differential

 

See sections "II.D.2.b)" and

 

low.

 

 

"II.D.3.c)" for defaults.

 

 

b)Frozen Food

1. Frozen food recently

1. Allow time for unit to return to

 

 

 

placed in refrigerator.

setpoint temperature.

 

 

c) Thermistor

1. Defective.

1. Check and replace.

 

 

d)Compressor Relay

1. Defective; contacts

1. Replace.

 

 

 

welded.

 

 

 

e)Control Board

1. Defective.

1. Replace.

[8]

Evaporator does

a)Defrost Thermistor

1. Defective.

1. Check and replace.

 

not defrost

b)Defrost

1. Not enough defrosts

1. Factory default is once every

 

completely.

 

occurring per day.

6 hours. If coil is frosting too

 

 

 

Operation in humid

much, can shorten defrost

 

 

 

conditions.

interval.

 

 

c) Defrost Heaters

1. Defective.

1. Replace heaters.

 

 

d)Safety Defrost

1. Defective, turning off

1. Replace safety defrost

 

 

Thermostat

heaters prematurely,

thermostat.

 

 

 

or fused open.

 

 

 

e)Defrost Heater

1. Blown.

1. Determine why fuse blew.

 

 

Temperature Fuse

 

Replace fuse.

43

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Contents Superior Degree Reliability Energy Star Contents Page Dimensions Specifications Nameplate RatingsUndercounter 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 ConstructionRefrigerators Continuous Operating Mode Sequence of Operation and Timing ChartsSequence 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 DiagnosticsSwitching the Display Between Fahrenheit and Celsius F5 Temperature DisplayAdjusting 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 F7Continuous Perimeter Frame HeaterEnergy 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
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