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