Commercial Refrigerators & Freezers Undercounter & Worktop Series
SERVICE MANUAL
Models
HoshizakiHoshizaki America, Inc
ENERGY STAR
CONTENTS
1. Alarm Display Priority
III. Service Diagnosis
A. Alarm Codes
2. Alarm Details and Countermeasures
Undercounter Model Names
I. Specifications A. Nameplate Ratings
B. Dimensions
HUR96A-D, HWR96A-D
1. HUR40A, HUF40A Units mm in 1a. HUR40A-D, HUF40A-D
Units mm in
2. HWR40A, HWF40A
2a. HWR40A-D, HWF40A-D
Units mm in
3. HUR68A, HUF68A
3a. HUR68A-D, HUF68A-D
Units mm in
4. HWR68A, HWF68A
4a. HWR68A-D, HWF68A-D
5a. HUR96A-D
5. HUR96A Units mm in
6. HWR96A Units mm in 6a. HWR96A-D
II. General Information A. Construction
Evaporator Case
a Sequence of Operation
B. Sequence of Operation and Timing Charts
1. Refrigerators - Continuous Operating Mode
POWER ON Board Self Check
Power ON
Timing Chart
Defrost Indicator
Time
2. Freezers - Continuous Operating Mode
a Sequence of Operation
Power ON
Timing Chart
Defrost Indicator
Time
2-minute Delay
3. Refrigerators - Energy Saving Operating Mode
POWER ON Board Self Check
a Sequence of Operation
Power ON
Timing Chart
Defrost Indicator
Defrost Thermistor
2-minute Delay
4. Freezers - Energy Saving Operating Mode
POWER ON
a Sequence of Operation
Power ON
Timing Chart
Defrost Indicator
Defrost Thermistor
1. Start-Up Delay
C. Control Board
Rear
Relay Wiring Harness K311
Thermistor Wiring Harness K151
Front
D. Settings and Diagnostics
1. Gaining Access to Settings and Diagnostics
b Adjusting the Setpoint Temperature
2. Temperature Display
a Switching the Display Between Fahrenheit and Celsius F5
c Cabinet Temperature Correction calibration factor
earlier
3. Settings and Diagnostics Menu
Freezer
b Defrost Termination Temperature F1
a Defrost Interval F0
c Setpoint Temperature Differential F2
Detection Time
d High Temperature Alarm Delay Time F3
e Low Temperature Alarm Delay Time F4
Alarm Code
f Temperature Display Scale F5
g Alarm History F6
Description
h Compressor Run Time F7
4. Operating Modes
b Energy Saving
E. Perimeter Frame Heater
a Continuous
c Automatic Corrections Made During Energy Saving Operating Mode
III. Service Diagnosis A. Alarm Codes
1. Alarm Display Priority
Reset Options
2. Alarm Details and Countermeasures
a. High Temperature Alarm E1
Possible Causes
Possible Causes
b. Low Temperature Alarm E2
Reset Options
Reset Options
c. Defrost Alarm E3
d. High Pressure Alarm E4
Reset Options
Possible Causes
e. Clogged Filter Alarm E7
Reset Options
Possible Causes
f. Defrost Temperature Sensor Malfunction Alarm E8
Reset Options
Possible Causes
g. Clogged Filter Sensor Malfunction Alarm E9
Reset Options
h. Control Board Error Alarms EA and ED
Reset Options
Possible Cause
B. Diagnosis Chart
Problem
Remedy
Remedy
Problem
Possible Cause
Remedy
Problem
Possible Cause
C. Thermistor Check
1. Refrigerant Recovery
IV. Removal and Replacement of Components
A. Service for Refrigerant Lines
2. Brazing
3. Evacuation and Recharge
B. Removal and Replacement of Refrigeration Unit
C. Removal and Replacement of Compressor
D. Removal and Replacement of Evaporator
10 Remove the evaporator and drier
5 Recover the refrigerant and store it in an approved container
17 Plug in the unit, and turn on the power supply
11 Place the new evaporator and new drier in position
E. Removal and Replacement of Capillary Tube / Suction Line Assembly
Defrost Thermistor
F. Removal and Replacement of Thermistors
Cabinet Thermistor
Clogged Filter Thermistor sensor
G. Removal and Replacement of Door Gasket
H. Removal and Replacement of Defrost Heater
I. Removal and Replacement of Control Board
Condenser Fan Motor
J. Removal and Replacement of Fan Motors
K. Door Re-Hinging and Drawer Conversion
Evaporator Fan Motor
1. Stainless Steel Exterior
V. Cleaning and Maintenance Instructions
A. Cleaning
2. Stainless Steel Interior
6. Shelves
B. Maintenance
5. Air Filter
7. Drawers
VI. 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