Hoshizaki HWF68A-D User manual

Hoshizaki

“A Superior Degree

of Reliability”

www.hoshizaki.com

Models

Refrigerators

HUR40A(-D) HWR40A(-D)

HUR68A(-D) HWR68A(-D)

HUR96A(-D) HWR96A(-D)

Freezers

HUF40A(-D) HWF40A(-D)

HUF68A(-D) HWF68A(-D)

Commercial Refrigerators & Freezers

Undercounter & Worktop Series

Hoshizaki America, Inc.

Number: 73123

Issued: 2-4-2005

Revised: 9-30-2008

SERVICE MANUAL



IMPORTANT

Only qualied service technicians should attempt to service or maintain this

unit. No such service or maintenance should be undertaken until the technician

has thoroughly read this Service Manual.

Hoshizaki provides this manual primarily to assist qualied service technicians in the

service and maintenance of the unit.

Should the reader have any questions or concerns which have not been satisfactorily

addressed, please call, write or send an e-mail message to the Hoshizaki Technical

Support Department for assistance.

HOSHIZAKI AMERICA, INC.

618 Highway 74 South

Peachtree City, GA 3069

Attn: Hoshizaki Technical Support Department

Phone: 1-800-33-1940 Technical Support

(770) 487-331

Fax: 1-800-843-1056

(770) 487-3360

E-mail: [email protected]

Web Site: www.hoshizaki.com

NOTE: To expedite assistance, all correspondence/communication MUST include the

following information:

• Model Number __________________________

• Serial Number __________________________

• Complete and detailed explanation of the problem.

ENERGY STAR

®

Products earning the ENERGY STAR prevent greenhouse gas emissions by meeting strict

energy efciency guidelines set by the U.S. Environmental Protection Agency and the

U.S. Department of Energy. Several models of Hoshizaki undercounters have earned the

ENERGY STAR. To easily determine if your unit has earned the ENERGY STAR, see the

nameplate attached to the right wall on the inside of the cabinet.

3

CONTENTS

I. Specications ..................................................................................................................... 5

A. Nameplate Ratings ....................................................................................................... 5

B. Dimensions ................................................................................................................... 5

1. HUR40A, HUF40A .................................................................................................. 6

1a. HUR40A-D, HUF40A-D ......................................................................................... 6

. HWR40A, HWF40A ................................................................................................. 7

a. HWR40A-D, HWF40A-D ....................................................................................... 7

3. HUR68A, HUF68A .................................................................................................. 8

3a. HUR68A-D, HUF68A-D ......................................................................................... 8

4. HWR68A, HWF68A ................................................................................................. 9

4a. HWR68A-D, HWF68A-D ....................................................................................... 9

5. HUR96A ................................................................................................................ 10

5a. HUR96A-D .......................................................................................................... 10

6. HWR96A ............................................................................................................... 11

6a. HWR96A-D ......................................................................................................... 11

II. General Information ........................................................................................................ 1

A. Construction ................................................................................................................ 1

B. Sequence of Operation and Timing Charts ................................................................ 13

1. Refrigerators – Continuous Operating Mode ........................................................ 13

. Freezers – Continuous Operating Mode ............................................................. 15

3. Refrigerators – Energy Saving Operating Mode .................................................. 17

4. Freezers – Energy Saving Operating Mode ......................................................... 19

C. Control Board ............................................................................................................. 1

1. Start-Up Delay ....................................................................................................... 1

. Control Board Layout ............................................................................................ 

D. Settings and Diagnostics ............................................................................................ 3

1. Gaining Access to Settings and Diagnostics ......................................................... 3

. Temperature Display ............................................................................................. 4

a) Switching the Display Between Fahrenheit and Celsius (F5) .......................... 4

b) Adjusting the Setpoint Temperature ................................................................ 4

c) Cabinet Temperature Correction (calibration factor) ........................................ 5

3. Settings and Diagnostics Menu ............................................................................. 6

a) Defrost Interval (F0) ......................................................................................... 7

b) Defrost Termination Temperature (F1) ............................................................ 7

c) Setpoint Temperature Differential (F) ............................................................ 8

d) High Temperature Alarm Delay Time (F3) ....................................................... 9

e) Low Temperature Alarm Delay Time (F4) ....................................................... 9

f) Temperature Display Scale (F5) ....................................................................... 30

g) Alarm History (F6) ............................................................................................ 30

h) Compressor Run Time (F7) ............................................................................. 31

Please review this manual. It should be read carefully before the unit is serviced or

maintenance operations are performed. Only qualied service technicians should service

and maintain the unit. This manual should be made available to the technician prior to

service or maintenance.

4

4. Operating Modes ................................................................................................... 31

a) Continuous ....................................................................................................... 3

b) Energy Saving ................................................................................................. 3

c) Automatic Corrections Made During Energy Saving Operating Mode ............. 3

E. Perimeter Frame Heater ............................................................................................. 3

III. Service Diagnosis ........................................................................................................... 33

A. Alarm Codes ............................................................................................................... 33

1. Alarm Display Priority ............................................................................................ 34

. Alarm Details and Countermeasures .................................................................... 35

a. High Temperature Alarm (E1) .......................................................................... 35

b. Low Temperature Alarm (E) ........................................................................... 36

c. Defrost Alarm (E3) ........................................................................................... 37

d. High Pressure Alarm (E4) ................................................................................ 37

e. Clogged Filter Alarm (E7) ................................................................................ 38

f. Defrost Temperature Sensor Malfunction Alarm (E8) ....................................... 39

g. Clogged Filter Sensor Malfunction Alarm (E9) ................................................. 40

h. Control Board Error Alarms (EA and ED) ........................................................ 41

B. Diagnosis Chart .......................................................................................................... 4

C. Thermistor Check ....................................................................................................... 45

IV. Removal and Replacement of Components .................................................................. 46

A. Service for Refrigerant Lines ...................................................................................... 46

1. Refrigerant Recovery ............................................................................................ 46

. Brazing .................................................................................................................. 46

3. Evacuation and Recharge .................................................................................... 47

B. Removal and Replacement of Refrigeration Unit........................................................ 48

C. Removal and Replacement of Compressor ................................................................ 48

D. Removal and Replacement of Evaporator .................................................................. 49

E. Removal and Replacement of Capillary Tube / Suction Line Assembly ..................... 51

F. Removal and Replacement of Thermistors ................................................................. 5

G. Removal and Replacement of Door Gasket ............................................................... 53

H. Removal and Replacement of Defrost Heater ............................................................ 53

I. Removal and Replacement of Control Board ............................................................... 54

J. Removal and Replacement of Fan Motors .................................................................. 55

K. Door Re-Hinging and Drawer Conversion .................................................................. 55

V. Cleaning and Maintenance Instructions .......................................................................... 56

A. Cleaning ...................................................................................................................... 56

B. Maintenance ............................................................................................................... 57

VI. Wiring Diagrams ............................................................................................................ 58

A1. HUR40A, HWR40A (auxiliary code Q5 and earlier).................................................. 58

A. HUR40A(-D), HWR40A(-D) (auxiliary code Q6 and later) ....................................... 59

B. HUF40A(-D), HWF40A(-D) ......................................................................................... 60

C1. HUR68A, HWR68A (auxiliary code Q5 and earlier) ................................................. 61

C. HUR68A(-D), HWR68A(-D) (auxiliary code Q6 and later) ........................................ 6

D. HUF68A(-D), HWF68A(-D) ......................................................................................... 63

E. HUR96A(-D), HWR96A(-D) ........................................................................................ 64

5

Undercounter Model Names

The undercounter models covered in this service manual initially had different model

names. If you have a unit with an auxiliary code of N-6 and a serial number ending in "H",

refer to the table below.

Model Name on

Nameplate

Current

Name

UR1-SSB HUR40A

UR-SSB

HUR68A

UF1-SSB HUF40A

UF-SSB

HUF68A

I. Specications

A. Nameplate Ratings

Design Pressure

(PSIG)

Refrigerant

(oz.)

Model AC Supply Voltage Amperes HI LO 404A 134a

HUR40A(-D), HWR40A(-D) 115/60/1 5.0 40 10 15.

HUR68A(-D), HWR68A(-D) 115/60/1 5.0 40 10 15.

HUR96A(-D), HWR96A(-D) 115/60/1 6.0 40 10 15.

HUF40A(-D), HWF40A(-D) 115/60/1 5.5 450 50 14.1

HUF68A(-D), HWF68A(-D) 115/60/1 10.0 450 50 13.0

Model

Door Opening mm Total Refrigerated

Volume ft

3

Total Shelf

Space ft

2

Hotel Pan

Capacity (-D)

Width Height

HUR40A(-D), HWR40A(-D),

HUF40A(-D), HWF40A(-D)

570. 616.

8.5 7.6 4

HUR68A(-D), HWR68A(-D),

HUF68A(-D), HWF68A(-D)

18.8 17.1 8

HUR96A(-D), HWR96A(-D) 9.1 6.6 1

B. Dimensions

6

Units: mm (in.)

1a. HUR40A-D, HUF40A-D

1. HUR40A, HUF40A

7

2. HWR40A, HWF40A

Units: mm (in.)

2a. HWR40A-D, HWF40A-D

8

3. HUR68A, HUF68A

Units: mm (in.)

3a. HUR68A-D, HUF68A-D

9

4. HWR68A, HWF68A

Units: mm (in.)

4a. HWR68A-D, HWF68A-D

10

5. HUR96A

5a. HUR96A-D

Units: mm (in.)

11

6a. HWR96A-D

6. HWR96A

Units: mm (in.)

1

Compressor Base

Condenser Fan Motor

Front Panel

Evaporator Case Cover

Control Box

Compressor

Side Panel

Evaporator Case

Capillary Tube/Suction

Line Assembly

Condenser

Evaporator Assembly

Access Valve (Low-Side)

Cabinet Thermistor

Thermal Fuse

Evaporator Case Cover

Evaporator Fan Motor

Evaporator

Defrost Heater

Defrost Thermistor

Evaporator Shroud

Defrost Thermostat

Evaporator Case

II. General Information

A. Construction

Hoshizaki undercounters feature a cartridge-type refrigeration unit that can be removed

without taking off the top and side panels.

13

Note:

1) Cut-on, cut-off, and cabinet temperature are read by the same sensor, called the

"cabinet thermistor."

) The defrost thermistor reads the evaporator temperature.

3) There is a ve second evaporator fan startup delay when the compressor and

fan would otherwise start together.

B. Sequence of Operation and Timing Charts

For details on operating modes, see "II.D.4. Operating Modes."

1. Refrigerators – Continuous Operating Mode

a) Sequence of Operation

Five minutes after

defrost heater off

1. Compressor on

. Condenser fan on

Five minutes after

compressor start-up

1. Evaporator fan(s) on

. Frame heater(s) on

(Q6 and later)

One minute after evaporator

fan start-up "dF" no

longer displayed, cabinet

temperature displayed

Board Self Check

1. Frame heater(s) on

. Evaporator fan(s) on

POWER ON

2-minute Delay

1. Compressor start-up

. Condenser fan start-up

Cycle Off (Cut-out

temperature reached)

[Minimum  minutes]

1. Compressor off

. Condenser fan off

Continue as

normal cycling

Cycle On (Cut-on

temperature reached)

[Minimum  minutes]

1. Compressor start-up

. Condenser fan start-up

Defrost End

Defrost thermistor

reaches defrost

termination temperature,

or defrost timer reaches

1 hour

Defrost heater off

Defrost Start

Preprogrammed time interval

1. Compressor off

. Evaporator fan(s) off

3. Frame heater(s) off (Q6 and later)

4. Condenser fan off

5. Defrost heater on

6. "dF" displayed

14

b) Timing Chart

Refrigerators – Continuous Operating Mode

N

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NO

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TIME-TEMPERATURE CONTROL CHART ENERGY SAVING MODE

REFRIGERATORS

1AND,ATER

1AND%ARLIER

Frame Heater(s)

15

2. Freezers – Continuous Operating Mode

a) Sequence of Operation

Note:

1) Cut-on, cut-off, and cabinet temperature are read by the same sensor, called the

"cabinet thermistor."

) The defrost thermistor reads the evaporator temperature.

3) There is a ve second evaporator fan startup delay when the compressor and

fan would otherwise start together.

Five minutes after

defrost heater off

1. Compressor on

. Condenser fan on

Five minutes after

compressor start-up

1. Evaporator fan(s) on

Eight minutes after evaporator

fan start-up "dF" no longer

displayed, cabinet temperature

displayed

Board Self Check

1. Frame heater(s) on

. Evaporator fan(s) on

POWER ON

2 minute delay

1. Compressor start-up

. Condenser fan start-up

Cycle Off (Cut-out

temperature reached)

[Minimum  minutes]

1. Compressor off

. Condenser fan off

Continue as

normal cycling

Cycle On (Cut-on

temperature reached)

[Minimum  minutes]

1. Compressor start-up

. Condenser fan start-up

Defrost end

Defrost thermistor

reaches defrost

termination

temperature, or defrost

timer reaches 1 hour

Defrost heater off

Defrost Start

Preprogrammed time interval

1. Compressor off

. Evaporator fan(s) off

3. Condenser fan off

4. Defrost heater on

5. "dF" displayed

16

b) Timing Chart

Freezers – Continuous Operating Mode

N

O

F

O

N

O

FF

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TIME-TEMPERATURE CONTROL CHART [NOT DURING ENERGY SAVING MODE] FOR

REFRIGERATORS & FREEZERS WITH AUXILIARY CODE _____ AND BEFORE

Frame Heater(s)

17

3. Refrigerators – Energy Saving Operating Mode

a) Sequence of Operation

Note:

1) Cut-on, cut-off, and cabinet temperature are read by the same sensor, called the "cabinet

thermistor."

) The defrost thermistor reads the evaporator temperature.

Defrost End

Defrost thermistor

reaches defrost

termination temperature,

or defrost timer reaches

1 hour

Defrost heater off

Defrost Start

Preprogrammed time interval

1. Compressor off

. Frame heater(s) off (Q6 and later)

3. Evaporator fan(s) off

4. Condenser fan off

5. Defrost heater on

6. "dF" displayed

Five minutes after

defrost heater off

1. Compressor on

. Condenser fan on

Five minutes after

compressor start-up

1. Evaporator fan(s) on

. Frame heater(s)

on (Q6 and later)

Board Self Check

1. Frame heater(s) on continuously

(Q5 and earlier)

Frame heater(s) cycle on and off

(Q6 and later)

. Evaporator fan(s) cycles on and off

POWER ON

2-minute Delay

1. Compressor start-up

. Condenser fan start-up

3. Frame heater(s) on

(continuously)

4. Evaporator fan(s) on

(continuously)

Cycle Off (Cut-out

temperature reached)

[Minimum  minutes]

1. Compressor off

. Condenser fan off

3. Frame heater(s)

cycle on and off

(Q6 and later)

4. Evaporator fan(s)

cycles on and off

Continue as

normal cycling

Cycle On (Cut-on

temperature reached)

[Minimum  minutes]

1. Compressor start-up

. Condenser fan start-up

3. Frame heater(s) on

(continuously)

4. Evaporator fan(s) on

(continuously)

One minute after evaporator

fan start-up "dF" no longer

displayed, cabinet temperature

displayed

18

b) Timing Chart

Refrigerators – Energy Saving Operating Mode

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TIME-TEMPERATURE CONTROL CHART [DURING ENERGY SAVING MODE] FOR

REFRIGERATORS

WITH AUXILIARY CODE _____ AND AFTER

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19

4. Freezers – Energy Saving Operating Mode

a) Sequence of Operation

Note:

1) Cut-on, cut-off, and cabinet temperature are read by the same sensor, called the "cabinet

thermistor."

) The defrost thermistor reads the evaporator temperature.

Five minutes after

defrost heater off

1. Compressor on

. Condenser fan on

Five minutes after

compressor start-up

1. Evaporator fan(s) on

Eight minutes after evaporator

fan start-up "dF" no longer

displayed, cabinet temperature

displayed

Board Self Check

1. Frame heater(s) on

. Evaporator fan(s)

cycles on and off

POWER ON

2-minute Delay

1. Compressor start-up

. Condenser fan start-up

3. Evaporator fan(s) on

(continuously)

Cycle Off (Cut-out

temperature reached)

[Minimum  minutes]

1. Compressor off

. Condenser fan off

3. Evaporator fan(s)

cycles on and off

Continue as

normal cycling

Cycle On (Cut-on

temperature reached)

[Minimum  minutes]

1. Compressor start-up

. Condenser fan start-up

3. Evaporator fan(s) on

(continuously)

Defrost Start

Preprogrammed time interval

1. Compressor off

. Evaporator fan(s) off

3. Condenser fan off

4. Defrost heater on

5. "dF" displayed

Defrost End

Defrost thermistor

reaches defrost

termination temperature,

or defrost timer reaches

1 hour

Defrost heater off

0

b) Timing Chart

Freezers – Energy Saving Operating Mode

nehw

y

ale

d

pu

t

rat

s

naf

rot

a

ro

p

ave

dno

c

es

evi

F

NO

F

O

N

O

F

O

)

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Hoshizaki HWF68A-D User manual

Hoshizaki HWF68A-D User manual

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