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