Hoshizaki America TempGuard Service Manual

Hoshizaki

“A Superior Degree

of Reliability”

www.hoshizaki.com

Models TempGuard

Commercial Refrigerators & Freezers

Hoshizaki America, Inc.

Number: 73077 Issued: 3-8-1999 Revised: 2-21-2007

SERVICE MANUAL

IMPORTANT

Only qualiﬁed 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 qualiﬁed 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 30269

Attn: HOSHIZAKI Technical Support Department

Phone: 1-800-233-1940 Technical Service (770) 487-2331 Fax: 1-800-843-1056 (770) 487-3360 E-mail: techsupport@hoshizaki.com

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

Please review this manual. It should be read carefully before the unit is serviced or maintenance operations are performed. Only qualiﬁed service technicians should service and maintain the unit. This manual should be made available to the technician prior to service or maintenance.

CONTENTS

I. Speciﬁcations ...................................................................................................................... 5

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

B. Dimensions ................................................................................................................... 6

1. Notes for All Units .................................................................................................... 6

2. RH1-SSB(-HD), FH1-SSB(-HD), RFH1-SSB-HD, RH1-SSB-GD ............................ 7

3. RH2-SSB(-HD), FH2-SSB(-HD), RFH2-SSB(-HD), RH2-SSB-GD ......................... 8

4. RH3-SSB(-HD), FH3-SSB(-HD), RFH3-SSB(-HD), RH3-SSB-GD ......................... 9

5. PTR1SSB-xxxx, PTR1-SSB01-10 ......................................................................... 10

II. General Information ......................................................................................................... 11

A. Sequence of Operation and Timing Charts ................................................................. 11

1. Refrigerator and Refrigerator Side of Dual Temp Models ...................................... 11

2. Freezer (except freezer side of RFH1-SSB-HD) auxiliary code P5 and earlier .....

3. Freezer (except freezer side of RFH1-SSB-HD) auxiliary code P6 and later ........ 15

4. Freezer Side of RFH1-SSB-HD ............................................................................. 17

B. Display Board .............................................................................................................. 19

C. Control Board .............................................................................................................. 20

1. Location ................................................................................................................. 20

2. Control Board Layout .............................................................................................

D. Settings and Diagnostics ............................................................................................. 22

1. Guarded Access Menu ......................................................................................... 22

a) Temperature Setpoint ...................................................................................... 22

b) Defrost Frequency ......................................................................................... 22

c) Temperature Display Scale (°F or °C) .............................................................. 23

2. Diagnostics Menu ................................................................................................. 24

E. Alarm Signals and Countermeasures ......................................................................... 25

F. Compressor Protector .................................................................................................. 26

G. Perimeter Frame Heater ............................................................................................. 26

H. Glass Door Heater ...................................................................................................... 26

III. Service Diagnosis ........................................................................................................... 27

A. Diagnosis Chart .......................................................................................................... 27

B. Thermistor Check ........................................................................................................ 30

IV. Removal and Replacement of Components ................................................................... 31

A. Service for Refrigerant Lines ...................................................................................... 31

1. Refrigerant Recovery ............................................................................................. 31

2. Brazing .................................................................................................................. 31

3. Evacuation and Recharge ..................................................................................... 32

B. Removal and Replacement of Compressor ................................................................ 33

C. Removal and Replacement of Expansion Valve ......................................................... 34

D. Removal and Replacement of Evaporator .................................................................. 35

E. Removal and Replacement of Evaporator Fan Shroud Assembly .............................. 36

F. Removal and Replacement of Heat Shield on FH2-SSB(-HD) .................................... 37

G. Removal and Replacement of Door Gasket ............................................................... 37

H. Removal and Replacement of Door Closure Spring ................................................... 38

I. Removal and Replacement of Control Board ............................................................... 39

J. Door Re-Hinging (except glass doors) ......................................................................... 40

V. Cleaning Instructions ....................................................................................................... 41

VI. Wiring Diagrams ............................................................................................................. 42

A1. RH1-SSB(-HD) (auxiliary code L5 and earlier) ......................................................... 42

A2. RH1-SSB(-HD) (auxiliary code M5 and later) ...........................................................

B1. RH2-SSB(-HD) (auxiliary code L5 and earlier) .........................................................

B2. RH2-SSB(-HD) (auxiliary code M5 and later) ........................................................... 45

C1. RH3-SSB(-HD) (auxiliary code L5 and earlier) ......................................................... 46

C2. RH3-SSB(-HD) (auxiliary code M5 and later) ........................................................... 47

D1. RH1-SSB-GD (auxiliary code N6 and earlier) ........................................................... 48

D2. RH1-SSB-GD (auxiliary code P5 and later) ..............................................................

E1. RH2-SSB-GD (auxiliary code N6 and earlier) ........................................................... 50

E2. RH2-SSB-GD (auxiliary code P5 and later) .............................................................. 51

F1. RH3-SSB-GD (auxiliary code K0) ............................................................................. 52

F2. RH3-SSB-GD (auxiliary code N6 and later) .............................................................. 53

G1. FH1-SSB(-HD) (auxiliary code P5 and earlier) ......................................................... 54

G2. FH1-SSB(-HD) (auxiliary code P6 and later) ............................................................ 55

H1. FH2-SSB(-HD) (auxiliary code P5 and earlier) ......................................................... 56

H2. FH2-SSB(-HD) (auxiliary code P6 and later) ............................................................ 57

I. RFH1-SSB-HD ............................................................................................................. 58

1. Refrigerator ........................................................................................................... 58

2a. Freezer (auxiliary code P5 and earlier) ............................................................... 59

2b. Freezer (auxiliary code Q5 and later) .................................................................. 60

J. RFH2-SSB(-HD) .......................................................................................................... 61

K. RFH3-SSB(-HD).......................................................................................................... 61

L. RIR2-SSB51-02 ........................................................................................................... 62

M. PTR1SSB-xxxx, PTR1-SSB01-10 .............................................................................. 63

43 44

I. Speciﬁcations

A. Nameplate Ratings

Design Pressure (PSIG) Refrigerant

AC Supply Voltage Amperes HI LO R-404A

RH1-SSB / RH1-SSB-HD 115/60/1 7.0 450 200 12.2 OZ

RH1-SSB-GD 115/60/1 10.7 450 200 16.1 OZ

FH1-SSB / FH1-SSB-HD 115/60/1 12.0 450 250 15.2 OZ

RH2-SSB / RH2-SSB-HD

RH2-SSB-GD

FH2-SSB / FH2-SSB-HD

RH3-SSB / RH3-SSB-HD 115/60/1 13.0 450 200 23.2 OZ

RH3-SSB-GD 115/60/1 15.5 450 250 31.4 OZ

RIR2-SSB51-02

PTR1SSB-xxxx / PTR1-SSB01-10 115/60/1 12.0 450 250 15.5 OZ

AC Supply

Voltage Amperes

RFH2-SSB / RFH2-SSB-HD

RFH3-SSB / RFH3-SSB-HD 115/60/1 22 450 200 450 250 18.2 OZ 15.2 OZ

RFH1-SSB-HD 115/60/1 16.0 450 250 450 250 9.5 OZ 12.0 OZ

115/60/1 19 450 200 450 250 12.2 OZ 15.2 OZ

115/60/1 10.0 450 200 18.2 OZ

115/60/1 11.8 400 200 21.5 OZ

115/60/1 15.5 450 250 20.1 OZ

115/60/1 11.0 450 200 18.2 OZ

Design Pressure (PSIG) Refrigerant

Refrigerator Freezer R-404A

HI LO HI LO Refrigerator Freezer

See the nameplate for electrical and refrigeration speciﬁcations. The nameplate is located on the right side wall of the cabinet interior.

Note: We reserve the right to make changes in speciﬁcations and design without prior

notice.

B. Dimensions

1. Notes for All Units

a) Units: mm (in.) b) Legs have 25.4 mm (1 in.) height adjustment

Door Opening Total Refrigerated

Width

mm (in.)

RH1-SSB / FH1-SSB 554.8 (21.8) 1507(59.3) 22.3 11.5

RH1-SSB-GD 554.8 (21.8) 1507(59.3) 22.3

RH1-SSB-HD / FH1-SSB-HD 554.8 (21.8) 681.7(26.8) 22.3

RH2-SSB / FH2-SSB 554.8 (21.8)

RH2-SSB-GD / RIR2-SSB51-02 554.8 (21.8)

RH2-SSB-HD / FH2-SSB-HD 554.8 (21.8) 681.7(26.8)

RH3-SSB / FH3-SSB 554.8 (21.8) 1507(59.3) 73.7 39

RH3-SSB-GD 554.8 (21.8) 1507(59.3) 73.7

RH3-SSB-HD / FH3-SSB-HD 554.8 (21.8) 681.7(26.8) 73.7

RFH2-SSB 554.8 (21.8)

RFH2-SSB-HD 554.8 (21.8) 681.7(26.8) 22.3 22.3

RFH3-SSB 554.8 (21.8) 1507(59.3) 48.3 22.3 25.3 11.5

RFH3-SSB-HD 554.8 (21.8) 681.7(26.8) 48.3 22.3 25.3 11.5

RFH1-SSB-HD 554.8 (21.8) 681.7 (26.8) 9.1 10.5 11.5 (total)

Height

mm (in.)

1507(59.3) 48.3 25.3

1507(59.3) 48.3

1507(59.3) 22.3 22.3 11.5 11.5

Volume ft

Refrigerator Freezer Refrigerator Freezer

48.3

Total Shelf Space ft

11.5 11.5

Depth with

Doors Open

PTR1SSB-FSFS 2,177 (85.9) 554.8 (21.8) 1507(59.3) 23.8 13.6

PTR1SSB-FGFG 2,146.2 (84.7)

PTR1SSB-HSHS 2,177 (85.9) 554.8 (21.8) 681.7 (26.8)

PTR1SSB-HGHG 2,146.2 (84.7)

PTR1SSB-HGHS / PTR1-SSB01-10 (Half glass and half solid door combo)

2,161.6 (85.3)

Door Opening Total Refrigerated

Width

mm (in.)

Height

mm (in.)

Volume ft

Total Shelf Space ft

See the nameplate for electrical and refrigeration speciﬁcations. The nameplate is located on the right side wall of the cabinet interior.

Note: We reserve the right to make changes in speciﬁcations and design without prior

notice.

2. RH1-SSB(-HD), FH1-SSB(-HD), RFH1-SSB-HD, RH1-SSB-GD

mm (in.)

3. RH2-SSB(-HD), FH2-SSB(-HD), RFH2-SSB(-HD), RH2-SSB-GD

mm (in.)

4. RH3-SSB(-HD), FH3-SSB(-HD), RFH3-SSB(-HD), RH3-SSB-GD

mm (in.)

5. PTR1SSB-xxxx, PTR1-SSB01-10

mm (in.)

II. General Information

A. Sequence of Operation and Timing Charts

1. Refrigerator and Refrigerator Side of Dual Temp Models

a) Sequence of Operation

POWER ON

Board Self Check

Display reads "r_##" (## is board revision)

1. Frame heaters on

2. Evaporator fan on

Cycle On (Cut-on temperature reached) [Minimum 2.5 minutes]

1. Compressor on

2. Condenser fan on

2.5 minute delay

1. Compressor start-up

2. Condenser fan start-up

If evaporator temperature reaches 13°F (8°F for Pass Thru), unit initiates defrost.

1. Compressor off (Note: Condenser fan and evaporator fan are on.)

Cycle Off (Cut-out temperature reached) [Minimum 2.5 minutes]

1. Compressor off

2. Condenser fan off

Evaporator temperature reaches 40°F, defrost terminated

1. Compressor on

2. Condenser fan on

Normal cycling continues

Note: The start circuit of the compressor is timed such that at power-up and during

any compressor off time, there will be at least a 2 1/2 minute delay before the compressor will start. The only exception is when the overload activates and deactivates. The compressor has a 2 1/2 minute minimum run time during every run cycle.

b) Timing Chart

For refrigerator, and refrigerator side of Dual Temp models.

2. Freezer (except freezer side of RFH1-SSB-HD) auxiliary code P5 and earlier

a) Sequence of Operation

POWER ON

Board Self Check

Display reads "r_##" (## is board revision) Frame heaters on

Cycle On (Cut-on temperature reached) [Minimum 2.5 minutes]

1. Compressor on

2. Condenser on

3. Evaporator on

2.5 minute delay

1. Compressor start-up

2. Condenser fan start-up

3. Evaporator fan start-up

Defrost Start

Preprogrammed time interval

1. Compressor off

2. Evaporator fan off

3. Condenser fan off

4. Defrost heater on

5. "dEF" displayed

Cycle Off (Cut-out temperature reached) [Minimum 2.5 minutes]

1. Compressor off

2. Condenser fan off

3. Evaporator fan off

Defrost End

Defrost thermistor reaches 100°F; Defrost heater off

Five minutes after defrost heater off

1. Compressor on

2. Condenser fan on

Note: The start circuit of the compressor is timed such that at power-up and during

Evaporator temperature reaches below 70°F

1. Evaporator fan on

Cabinet temperature reads a value below 15°F above the setpoint. "dEF" no longer displayed, cabinet temp. displayed.

Normal cycling continues

b) Timing Chart

For freezer (except freezer side of RFH1-SSB-HD) auxiliary code P5 and earlier.

3. Freezer (except freezer side of RFH1-SSB-HD) auxiliary code P6 and later

a) Sequence of Operation

POWER ON

Board Self Check

Display reads "r_##" (## is board revision)

1. Frame heaters on

2. Evaporator fan on

Cycle On (Cut-on temperature reached) [Minimum 2.5 minutes]

1. Compressor on

2. Condenser fan on

2.5 minute delay

1. Compressor start-up

2. Condenser fan start-up

Defrost Start

Preprogrammed time interval

1. Compressor off

2. Evaporator fan off

3. Condenser fan off

4. Defrost heater on

5. "dEF" displayed

Cycle Off (Cut-out temperature reached) [Minimum 2.5 minutes]

1. Compressor off

2. Condenser fan off

Defrost End

Defrost thermistor reaches 100°F; Defrost heater off

Five minutes after defrost heater off

1. Compressor on

2. Condenser fan on

Evaporator temperature reaches below 70°F

1. Evaporator fan on

Normal cycling continues

Cabinet temperature reads a value below 15°F above the setpoint. "dEF" no longer displayed, cabinet temp. displayed.

Note: The start circuit of the compressor is timed such that at power-up and during

b) Timing Chart

For freezer (except freezer side of RFH1-SSB-HD) auxiliary code P6 and later.

4. Freezer Side of RFH1-SSB-HD

a) Sequence of Operation

POWER ON

Board Self Check

Display reads "r_##" (## is board revision); Frame heaters on

Cycle On (Cut-on temperature reached) [Minimum 2.5 minutes]

1. Compressor on

2. Condenser fan on

2.5 minute delay

1. Compressor start-up

2. Condenser fan start-up

3. Evaporator fan start-up

Defrost Start

Preprogrammed time interval

1. Compressor off

2. Evaporator fan off

3. Condenser fan off

4. Defrost heater on

5. "dEF" displayed

Cycle Off (Cut-out temperature reached) [Minimum 2.5 minutes]

1. Compressor off

2. Condenser fan off

Defrost End

Defrost thermistor reaches 100°F; Defrost heater off

Five minutes after defrost heater off

1. Compressor on

2. Condenser fan on

Evaporator temperature reaches below 70°F

1. Evaporator fan on

Cabinet temperature reads a value below 15°F above the setpoint. "dEF" no longer displayed, cabinet temp. displayed.

Normal cycling continues

Note: The start circuit of the compressor is timed such that at power-up and during

b) Timing Chart

For freezer side of RFH1-SSB-HD.

B. Display Board

The display board is located on the right hand side of the control panel between the top of the door and the front panel. From this area, information regarding the functioning of the unit can be obtained. When the unit is turned on, the ﬁrst display reads "r_##", where "##" indicates the board revision level. From the display board, various electronic controls and functions can also be adjusted. See "D. Settings and Diagnostics."

Evercheck Display Board

+ 44 hidden pages