Hoshizaki Temp Guard PTR1SSB01-10 Bedienungsanleitung

ISSUED: 73102

SEPT. 24, 2002

NUMBER:

HOSHIZAKI

TempGuardTM PASS THROUGH

MODEL

PTR1SSB01-XX

SERVICE MANUAL

with

REVISED: JUNE9,2004

Only qualified service technicians should attempt to service or maintain this unit. No

service or maintenance should be undertaken until the technician has thoroughly read

this Service Manual.

HOSHIZAKI AMERICA, INC.

618Highway74South

PeachtreeCity,GA 30269

Attn: HOSHIZAKITechnicalSupportDepartment

Phone: 1-800-233-1940TechnicalService

(770)487-2331

Fax: (770)487-3360

NOTE: Toexpediteassistance,allcorrespondence/communicationMUST includethefollowing

information:

•ModelNumber

•SerialNumber

•

Completeanddetailedexplanationoftheproblem

IMPORTANT

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 or write to the HOSHIZAKI Technical Support Department for

assistance.

Pleasereviewthismanual. Itshouldbereadcarefullybeforetheunitisservicedormain-

tenanceoperationsareperformed.Onlyqualifiedservicetechniciansshouldserviceand

maintaintheunit. Thismanualshouldbemadeavailabletothetechnicianpriortoservice

ormaintenance.

CONTENTS

PAGE

I. ELECTRONICCONTROLOPERATION .................................................................. 4

1. NORMAL ELECTRONIC CONTROL PROCESS

FLOW......................................

OPERATION FOR REFRIGERATOR.............................................................. 4

2. TIME - TEMPERATURE CONTROL CHART FOR REFRIGERATOR............... 5

3. DISPLAY BOARD.............................................................................................. 6

4. ALARM / ALERT SIGNALS ............................................................................... 8

5. DEFROST........................................................................................................ 12

6. START-UP DELAY .......................................................................................... 13

7. PERIMETER FRAME HEATER....................................................................... 13

8. GLASS DOOR HEATER ................................................................................. 13

DIAGNOSTIC MENU ....................................................................................... 14

10. CONTROL BOARD.......................................................................................... 17

II.

SERVICE DIAGNOSIS ........................................................................................ 19

III. REMOVAL AND REPLACEMENT OF COMPONENTS........................................ 23

1. SERVICE FOR REFRIGERANT LINES.......................................................... 23

2. BRAZING......................................................................................................... 24

3. REMOVAL AND REPLACEMENT OF COMPRESSOR................................... 25

4. REMOVAL AND REPLACEMENT OF DRIER ................................................. 26

5. REMOVAL AND REPLACEMENT OF EXPANSION VALVE ........................... 27

6. REMOVAL AND REPLACEMENT OF EVAPORATOR.................................... 28

7. REMOVAL AND REPLACEMENT OF DOOR GASKET .................................. 28

8. REMOVAL AND REPLACEMENT OF DOOR CLOSURE SPRING................. 29

9. REMOVAL AND REPLACEMENT OF CONTROL BOARD.............................. 30

10.

DOOR RE-HINGING........................................................................................ 31

IV. CLEANING INSTRUCTIONS................................................................................ 32

V. WIRING DIAGRAM ............................................................................................. 33

Note:

1) Cut-on / Cut-off / and Cabinet Temperature are read by the same sensor, called “cabinet

thermistor.

2) Defrost Thermistor reads Evaporator temperature.

I. ELECTRONIC CONTROL OPERATION

1. NORMAL ELECTRONIC CONTROL PROCESS FLOW OPERATION FOR REFRIGERATOR

POWER ON

Board Self Check

Display Read R##

(## is chip revision)

1) Frame heaters on

2) Evaporator fan on

2.5 minute delay

1. Compressor start-up

2. Condenser Fan start-up

Cycle Off (Cut-out

Temperature reached)

[Minimum2.5 minutes]

1) Compressor off

2) Condenser Fan off

(Normal Cycling)

Cycle On (Cut-on

Temperature reached)

[Minimum2.5 minutes]

1. Compressor on

2. Condenser Fan on

(Normal Cycling)

If evaporator temperature

reaches 10°F, unit initiates

defrost.

Compressor off

(Note: Condenser Fan and

Evaporator Fan are on.)

Evaporator temperature

reaches 40°F, defrost

terminated

Compressor on

Condenser Fan on

Continues as

Normal Cycling

Continuesas

normalcycling

2. TIME - TEMPERATURE CONTROL CHART FOR REFRIGERATOR

3. DISPLAY BOARD

The Display Board is located on the right hand side of the painted 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. From the Display Board various electronic controls and functions can also be adjusted.

Removing the Front Panel by lifting the panel up approximately one-half inch, then pulling it forward,

permits access to the Error Code Label, the Control Box and the Control Panel.

When unit is turned on, first display is “R##”, where “##” indicates chip revision level.

1) TEMPERATURE DISPLAY

• The cabinet temperature is displayed (factory set is °F, but can be changed to read °C).

• The cabinet temperature is updated every 20 seconds.

2) GUARDED ACCESS MENU

Three settings can be viewed and changed from this menu:

1. TheTemperature Setpoint. This setpoint is the value for the average cabinet

temperature.

2. Defrost Frequency.

Automatic defrost. “df X” has no effect.

3. Units of Display. F = Fahrenheit, C = Celsius

To enter this menu, press and hold the up/down arrows together for 3 seconds. The

Temperature Setpoint will be displayed first. To change a value, push the up/down arrows until

the desired value is displayed. Then push “ENTER” to set the value and view the next setting.

If no change in the value is desired, press “ENTER”, and the next setting will be displayed.

At the end of the sequence, press “ENTER” and the unit will return to normal display mode.

Note: End sequence and press “ENTER” for changes to take effect. If sequence is

not ended by pressing “ENTER,” display will return to normal temperature

display and no changes will take effect.

ALARM

3 beeps

every ten

seconds

4 beeps

every10

seconds

6 beeps

every10

seconds

RESET OPTIONS

Press “RESET.” If temp. has

returned to setpoint range, alarm

will stop and “E1” will clear.

If temp. is not back in range, “RE-

SET” will silence the alarm for 5

minutes. “E1” will continue to flash.

Press “RESET.” If temp. has

returned to setpoint range, alarm

will stop and “E2” will clear.

If temp. is not back in range, “RE-

SET” will silence the alarm for 5

minutes. “E2” will continue to

flash.

Press “RESET.” If pressure

switch resets automatically, alarm

will stop and “E4” will clear when

pressure switch closes.

If switch trips 5 times in 1

hour compressor will be

stopped, and not re-start. A

service technician must be

called.

For the Service Tech to reset this

alarm, press “RESET” on the

Control Board itself.

PROBLEM

Cabinet temp. has

exceeded set temp. by

10°F for more than 2

hours.

Cabinet temp. has

remained below setpoint

by 8°F for more than 1

hour.

Compressor discharge

pressure is outside

normal operating range.

Pressure switch has

been triggered 3 or

more times in 1 hour.

ERROR

MESSAGE

“E1” every 2

seconds,

alternating

with cabinet

temp.readout

“E2” every 2

seconds,

alternating

with cabinet

temp. readout

“E4” every 2

seconds,

alternating

with cabinet

temp.

4. ALARM / ALERT SIGNALS (*EXCLUDING GLASS DOOR MODELS)

RESET OPTIONS

Alarm automatically resets when

acceptable voltage is detected.

Press “RESET” to silence alarm for

5minutes.

Alarm automatically resets when

acceptable voltage is detected.

Press “RESET” to silence alarm for

5minutes.

Clean filter. Allow time for sensor

to react, then press “RESET.”

During alarm, press “RESET” to

silence alarm for 2 hours.

If this alarm occurs frequently,

discharge temperature is consis-

tently too high.

Replace sensor.Alarm will reset.

During alarm press “RESET” to

silence buzzer for 5 minutes.

Replace sensor.Alarm will reset.

During alarm press “RESET” to

silence buzzer for 5 minutes.

PROBLEM

Line voltage is too

high.

Line voltage is too

low.

Condenser filter

needs cleaning.

Cabinettemp.sensor

has failed.

Defrost temp. sensor

has failed.

ALARM

8 beeps

every 10

seconds

9 beeps

every 10

seconds

1 beep

every 10

seconds

Continuous

buzzer

Continuous

buzzer

ERROR MESSAGE

“E6” every 2 sec-

onds, alternating with

cabinettemp.

“E7” every 2 sec-

onds, alternating with

cabinettemp.

“CF” every 2 sec-

onds, alternating with

cabinettemp.;

“CLEAN FILTER”

LED lights.

“E8” every 2 seconds

“E9” every 2 sec-

onds, alternating with

thecabinettemp.

a) HIGH TEMPERATURE ALARM FUNCTION

When cabinet temp. has exceeded set temp. by 10°F or more for more than 2 hours,

an alarm buzzer sounds 3 beeps every 10 seconds, and an error message “E1” flashes

every 2 seconds, alternating with the cabinet temperature readout.

Reset Options:

If temperature has returned to setpoint range, pressing “RESET” on the Display Board will stop

the buzzer and clear the “E1” message.

If temperature is not back in range, pressing “RESET” on the display board will silence the

buzzer for 5 minutes. The “E1” message will continue to flash.

Note: Setting DIAGNOSTIC MENU item 3 to ON resets all alarms regardles of whether or not

setpoints are reached. This is a complete clearing of all alarms. See DIAGNOSTIC

MENU for details.

b) LOW TEMPERATURE ALARM FUNCTION

When the cabinet temperature has been below the setpoint by 8°F for more than 1 hour, the

buzzer will sound 4 beeps every 10 seconds, and “E2” will flash every 2 seconds, alternating

with the cabinet temperature readout.

Reset Options:

If temperature has returned to setpoint range, pressing “RESET” on the Display Board will stop

the buzzer and clear the “E2” message.

If temperature is not back in range, pressing “RESET” on the Display Board will silence the

buzzer for 5 minutes. The “E2” message will continue to flash.

Note: Setting DIAGNOSTIC MENU item 3 to ON resets all alarms regardles of whether or not

setpoints are reached. This is a complete clearing of all alarms. See DIAGNOSTIC

MENU for details.

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