Hoshizaki American, Inc. RFH3-SSB-J-2 User manual

Brand: Hoshizaki American, Inc.

Model: RFH3-SSB-J-2

Type: User manual

INSTRUCTION MANUAL

MARCH 4, 1999

ISSUED:

HOSHIZAKI

TempGuard

and SafeTemp

MARCH 13, 2003

REVISED:

REACH-INS

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: (770) 487-3360

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

information:

• Model Number

• Serial Number

• Complete and detailed explanation of the problem

Only qualified service technicians should attempt to install, service or maintain this

unit. No installation, service or maintenance should be undertaken until the

technician has thoroughly read this Instruction Manual. Likewise, the owner/manager

should not proceed to operate the unit until the installer has instructed them on its

proper operation.

HOSHIZAKI provides this manual primarily to assist qualified service technicians in the

installation, maintenance and service 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.

IMPORTANT

• Please review this manual. It should be read carefully before the unit is installed and

operated. Only qualified service technicians should install, service and maintain the

unit. This manual should be made available to the technician prior to installation,

maintenance or service.

• Keep this manual with the unit for later reference.

I. INSTALLATION AND OPERATING INSTRUCTIONS .............................. 13

CHECKS BEFORE INSTALLATION............................................. 13

2. HOW TO REMOVE FRONT PANEL ........................................... 14

[a] -SSB MODELS ...................................................................... 14

[b] -AAC MODELS ...................................................................... 14

3. LOCATION .................................................................................. 15

4. SET UP ....................................................................................... 15

5. ELECTRICAL CONNECTION ...................................................... 16

6. OVERFLOW PAN ....................................................................... 16

7. DRAIN CONNECTION ................................................................. 16

8. ELECTRICALLY HEATED CONDENSATE PAN (RFH1-SSB-HD) 16

FINAL CHECK LIST.................................................................... 17

10. START-UP................................................................................... 18

[a] -SSB MODELS...................................................................... 18

[b] -AAC MODELS...................................................................... 18

11. ELECTRONIC CONTROL OPERATION (-SSB MODELS) ......... 19

12. ELECTRONIC CONTROL OPERATION (-AAC MODELS) ......... 27

13. DOOR REVERSING ................................................................... 29

II. CLEANING AND MAINTENANCE INSTRUCTIONS .............................. 30

1. CLEANING................................................................................... 30

2. MAINTENANCE .......................................................................... 31

PAGE

CONTENTS

II. INSTALLATION AND OPERATING INSTRUCTIONS

1. CHECKS BEFORE INSTALLATION

IMPORTANT

Refer to the NAMEPLATE for electrical specifications. The NAMEPLATE is located

on the RIGHT side wall of the cabinet interior. We reserve the right to make specifi-

cation and design changes without prior notice.

1) All tape, packing material and shipping cartons should be removed from the machine

prior to installation. The equipment should be inspected for any damage which may

have occurred during shipment. Concealed damage claims must be filed with the carrier.

a) Visually check that the refrigerant lines do not rub or touch other lines or surfaces

and that the fan blades turn freely.

b) Check that the compressor is snug on all mounting pads.

WARNING

The compressor bolts on FH3-SSB(-HD) models have been torqued down to

completely compress the springs during shipping.

Before turning the unit on, back the bolts off of the fastening points until no spring

compression is present. This will allow the compressor to float freely.

2) Remove all accessory containers before discarding the packing materials. Dispose of all

packing materials in a proper and environmentally responsible manner.

3) To remove the unit from the skid:

a) Move as close to the final location as possible.

b) Remove the four 5/8 in. bolts that secure the cabinet to the skid.

c) Block the cabinet securely, at a height of 8 inches (203 mm.) off the floor.

d) Attach the adjustable legs (or optional casters) to the bottom of the cabinet.

2.HOW TO REMOVE FRONT PANEL

[a] TempGuard MODELS with “Lift-Up” style Front Panel

• Lift the panel UP approximately 1/2 inch (13 mm.) and then pull it FORWARD.

[b] TempGuard with “Hinged” style Front Panel and all SafeTemp MODELS

1. Push the Front Panel UP approximately 1/2 inch (13 mm.) until it is disengaged from

the locking collars and stops.

2. Rotate the panel UP and AWAY from the face of the unit until it stops once more.

3. Pull the Front Panel FORWARD until the hinge assembly is in the LOCKED

position.

3. LOCATION

CAUTION

This unit is not intended for outdoor installation. The air temperature should

be within a 45° F to 100° F range. Extended periods of operation at temperatures

exceeding these limitations may cause unsatisfactory results.

For best operating results:

• The machine should be on a flat, level and solid (firm) foundation.

• The unit should not be located in a corrosive environment.

• The air temperature range at the location should be between 45° F and 100° F.

• The unit should not be near ovens, grills or other high heat producing equipment.

• The unit should be a minimum of 4 inches (102 mm.) from all walls.

• If the unit is flush against a wall, a minimum of 10 inches (254 mm.) overhead clearance

for proper ventilation should be provided.

4. SET UP

1) Position the unit in the selected location. Level the unit in both the front-to-back and

side-to-side directions. The feet are provided with hex flats in order to facilitate

adjustment. Turn clockwise to lower each leg, and counterclockwise to raise each

leg.

2) Install the optional shelves using the shelf support clips provided in the accessory pack.

Indexing holes are provided every five positions to assist you in locating the support

clips. Two and three section units may be equipped with center shelves which should

be installed after the main shelves are in place. The center shelf kit contains additional

clip(s) which support the center shelf when the main shelves on one side of the cabinet

are not aligned with the main shelves of the other side of the cabinet.* See the

diagrams below.

CAUTION

*Without this additional support, under adverse loading conditions, the shelf assembly

could tip.

5. ELECTRICAL CONNECTION

1) Cord-connected units should only be plugged into a 115 volt ±10%, 60 Hz. circuit with a

national and local electrical code approved, grounded wall receptacle. A separate

circuit with its own circuit breaker (HACR type) or fuse (LP-CC type) should be

provided. Refer to the NAMEPLATE for the proper electrical specifications.

2) Hardwired units should only be wired into the proper conduit, with its own circuit

breaker (HACR type) or fuse (LP-CC type). Refer to the NAMEPLATE for the proper

electrical specifications.

WARNING

Failure to use a proper breaker or fuse can result in tripped breaker, blown fuses or

damage to existing wiring.

6.OVERFLOW PAN (if applicable)

Note: For units with an

electrically heated

condensate pan, see section “8.”)

1) Assemble the overflow pan's brackets by

engaging the tab on the bracket through

the hole in the unit bottom and securing

with the four mounting screws provided.

2) Slide the plastic pan into place under the

vinyl hose on the back of

cabinet.

7.DRAIN CONNECTION (if applicable)

1) This unit is provided with an energy efficient automatic condensate water disposal

system and normally requires no drain connection.

2) High relative humidity and frequent door openings for long periods of time could cause

excessive condensate water to form.

3) If this occurs, condensate water will drain out through the overflow drain tube located

inside the back wall of the cabinet and into the Overflow Pan.

4) In the unlikely event that water is found in the Overflow Pan, call your HOSHIZAKI

Service Representative for assistance.

OVERFLOW

BRACKET

TAB

8. ELECTRICALLY HEATED CONDENSATE PAN (if applicable)

WARNING

Verify that power to unit is disconnected before installing pan.

1) Remove the panel that covers the recess in the back of the unit.

2) Route the wire found in the recess in the back of the unit through the wire cover and

install the wire cover to the unit.

3) Plug the cord (wire) routed in Step 2) into the female plug of the Condensate Pan.

4) Replace the panel to cover the recess

in the back of the unit.

5) Clip the heated pan onto the

mounting plate and attach to

the panel that covers the recess

in the back of the unit using the

four screws provided.

6) Install the Plug Cover to

the rear of the unit.

9. FINAL CHECK LIST

1) Is the unit level?

2) Is the unit located in a site where the ambient temperature will be within the

+45° F to +100° F range—year round?

3) Is there at least 10 inches (254 mm.) overhead clearance for proper ventilation?

4) Have all shipping cartons, tapes and packing materials been removed from the unit?

5) Has the power supply been checked or tested against the nameplate rating?

6) Has the unit been checked for shipping damage?

7) Has the Owner's Warranty Registration been filled out and forwarded to the factory?

10. START UP

[a] -SSB MODELS

This unit is equipped with an electronic control which has been preset at the factory to

maintain an average cabinet storage temperature of -3° F for Freezers and 36° F for

Refrigerators. Remove the Front Panel for access to the power switch—located on the

control box front—and turn the switch on.

IMPORTANT

There is a 2 1/2 minute normal delay before the refrigeration system starts.

Allow the unit to pull down and start cycling on the controller prior to loading it with food

products.

[b] -AAC MODELS

This unit is equipped with an electronic control which has been preset at the factory to

maintain an average cabinet storage temperature of -3° F for Freezers and 36° F for

Refrigerators. Remove the Front Panel for access to the power switch—located on the

control box front—and turn the switch on.

IMPORTANT

For Refrigerators, there is a 5 minute normal delay before the refrigeration system

starts. For Freezers, Defrost is initiated when the power supply is turned on.

Allow the unit to pull down and start cycling on the controller prior to loading it with food

products.

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.

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.

• During unit defrost (Freezer only) , the cabinet temperature is not displayed, “dEF” is displayed

in its place.

2) GUARDED ACCESS MENU

Three settings can be viewed and changed from this menu:

1. Temperature Setpoint - This setpoint is the value for the average cabinet temperature.

i.e., set point = 36°F, compressor on at 39°F, compressor off at 33°F.

2. Defrost Frequency - Ex. “dF 4” = 4 defrost cycles per day. This display has no

meaning for the refrigerator; see Note under “4) DEFROST”.

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

To enter this menu, press and hold the up/down arrows simultaneously 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.

IMPORTANT NOTE: For change to take effect, must cycle through all three menus, and press

“ENTER” to return to standard display.

11. ELECTRONIC CONTROL OPERATION (TempGuard MODELS)

ALARM

3 beeps

every ten

seconds

4 beeps

every 10

seconds

[FREEZER

ONLY]

5 beeps

every 10

seconds

PROBLEM

[FREEZERS WITH BOARD

REVISION LEVEL 10 OR

BELOW AND ALL

REFRIGERATORS]

Cabinet temp. has

exceeded set temp. by

10°F for more than 2

hours.

[FREEZERS WITH BOARD

REVISION LEVEL 11 AND

ABOVE]

Cabinet temp. has

exceeded set temp. by

25°F for more than 4

hours.

(BOARD REVISION

LEVEL CAN BE SEEN ON

DISPLAY AT POWER UP)

Cabinet temp. has

remained below setpoint

by 8°F for more than 1

hour.

Defrost has taken longer

than 1 hour. Control

Board has terminated

defrost.

ERROR

MESSAGE

“E1” every 2

seconds,

alternating

with cabinet

temp. readout

“E2” every 2

seconds,

alternating

with cabinet

temp. readout

“E3” every 2

seconds,

alternating

with “dEF” or

cabinet temp.

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,

“RESET” 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,

“RESET” will silence the alarm for

5 minutes. “E2” will continue to

flash.

Press “RESET.” Alarm will stop and

“E3” will clear.

If 4 consecutive defrosts take

more than 1 hour, a qualified

service technician must be

called.

3) ALARM / ALERT SIGNALS (*EXCLUDING GLASS DOOR MODELS)

RESET OPTIONS

Press “RESET.” Alarm will stop

and “E4” will clear when pressure

switch closes.

If switch trips 5 times in 1 hour

compressor will be stopped, and

a service technician must be

called.

Alarm automatically resets when

acceptable voltage is detected.

Press “RESET” to silence alarm for

5 minutes.

Alarm automatically resets when

acceptable voltage is detected.

Press “RESET” to silence alarm for

5 minutes.

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, it

is recommended that a qualified

service technician be called.

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

Compressor

discharge pressure

is outside normal

operating range.

Pressure switch

has been triggered

3 or more times in

1 hour.

Line voltage is too

high.

Line voltage is too

low.

Condenser filter

needs cleaning.

Cabinet temp. sensor

has failed.

Defrost temp. sensor

has failed.

ALARM

6 beeps

every 10

seconds

8 beeps

every 10

seconds

9 beeps

every 10

seconds

1 beep

every 10

seconds

Continuous

buzzer

Continuous

buzzer

ERROR MESSAGE

“E4” every 2 seconds,

alternating with

cabinet temp.

“E6” every 2 seconds,

alternating with

cabinet temp.

“E7” every 2 seconds,

alternating with

cabinet temp.

“CF” every 2

seconds, alternating

with cabinet temp.;

“CLEAN FILTER”

LED lights.

“E8” every 2 seconds

“E9” every 2 seconds,

alternating with the

cabinet temp.

ERROR MESSAGE

*“door” every 2

seconds, alternating

with the cabinet

temp.

*“E10” every 2

seconds,

alternating with

cabinet temp.

*EXCLUDING GLASS DOOR MODELS

RESET OPTIONS

*Close door. During alarm, press

“RESET” to silence buzzer for 3

minutes.

*Call qualified service technician.

*During alarm, press “RESET” to

silence buzzer for 18 hours.

PROBLEM

*Display: Door open

Display and sound:

Door open longer than

3 minutes.

*Freezer and

Refrigerator boards

not communicating

properly to control

compressor delay

(RFH only).

ALARM

*2 beeps

every ten

seconds

*10 beeps

every 10

seconds

a) HIGH TEMPERATURE ALARM FUNCTION

When the cabinet temperature has exceeded the set temperature by 10°F 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.

Note: Refrigerator, 10°F for more than 2 hours.

Freezer R10 and below, 10°F for more than 2 hours.

Freezer R11 and above, 25°F for more than 4 hours.

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.

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.

c) DEFROST ERROR ALERT FUNCTION (FREEZER ONLY)

If, for any reason, the defrost takes longer than 1 hour, the alarm buzzer will sound 5 beeps

every 10 seconds, and “E3” will flash every 2 seconds, alternating with either “dEF” or the

cabinet temperature. If this alarm activates, the control board will automatically terminate the

defrost.

Reset options:

Pressing “RESET” on the Display Board will reset the buzzer and clear the “E3” from the

display.

IMPORTANT

If 4 consecutive defrosts take more than 1 hour, pressing “RESET” will only silence the buzzer

until the next defrost that lasts more than 1 hour. A qualified service technician must be called.

d) HIGH PRESSURE ALERT FUNCTION

In order to protect the compressor if the discharge pressure reaches a preset value (outside the

normal operating range), a switch will temporarily stop the compressor. At another preset

pressure, the compressor will attempt to restart. If the switch is triggered 3 times in 1 hour, the

buzzer will sound 6 beeps every 10 seconds, and “E4” will flash every 2 seconds, alternating

with the cabinet temperature. The same sequence will occur if the switch trips the fourth time in

1 hour.

Reset Options:

During the third and fourth trip alarm, the buzzer can be silenced by pressing “RESET” on the

Display Board.

The buzzer and display will automatically reset when the pressure switch closes after the 3rd

and 4th reset.

IMPORTANT

If the switch trips 5 times in 1 hour, the compressor will be stopped, and a service technician

must be called.

After the 5th pressure trip, the buzzer can be silenced for 1 hour by pressing “RESET” on the

Display Board.

e) HIGH VOLTAGE ALERT FUNCTION

When the unit detects the line voltage is above a preset value for 10 seconds, to protect the

compressor, the compressor will shut down. The buzzer will sound 8 beeps every 10 seconds.

“E6” will flash every 2 seconds, alternating with the cabinet temperature.

Reset Options:

This alarm automatically resets when an acceptable voltage is detected.

The buzzer can be silenced for 5 minutes while in alarm by pressing “RESET” on the Display

Board.

f) LOW VOLTAGE ALERT FUNCTION

When the unit detects the line voltage is below a preset value for 10 seconds, to protect the

compressor, the compressor will shut down. The buzzer will sound 9 beeps every 10 seconds.

“E7” will flash every 2 seconds, alternating with cabinet temperature.

Reset Options:

This alarm automatically resets when an acceptable voltage is detected.

The buzzer can be silenced for 5 minutes while in alarm by pressing “RESET” on the Display

Board.

g) CLEAN FILTER ALERT FUNCTION

The unit is equipped with a filter for protecting the condenser from dirt, oils, grease, etc. The

unit is also equipped with a sensor to determine if this filter needs cleaning. If the unit detects

that the condenser filter needs cleaning, it will flash “CF” every 2 seconds, alternating with the

cabinet temperature. The “CLEAN FILTER” LED will light up and the alarm buzzer will sound

1 beep every 10 seconds.

After cleaning the filter, allow time for the sensor to react, then press “RESET” on the Display

Board to reset the alarm.

During the alarm, pressing “RESET” on the Display Board will silence the alarm buzzer for

2 hours.

IMPORTANT

If this alarm occurs frequently even though the filter has been cleaned and reinstalled, it is

recommended that a service technician be called.

h) SENSOR ERROR

This unit uses two sensors to monitor internal temperatures:

Sensor #1: Cabinet Temperature Sensor. If this sensor fails, a continuous buzzer sounds

and “E8” will flash every 2 seconds, alternating with the sensor’s interpretation of cabinet

temperature.

Sensor #2: Defrost Temperature Sensor. If this sensor fails, a continuous buzzer sounds

and “E9” will flash every 2 seconds, alternating with the cabinet temperature.

These alarms automatically reset when a functioning sensor is installed.

During the alarm, pressing “RESET” on the display board will silence the buzzer for 5 minutes.

i) DOOR AJAR (EXCLUDING GLASS DOOR MODELS)

Immediately upon door opening, unit displays “door” alternating with cabinet temperature every 2

seconds. After 3 minutes with door open, displays “door” alternating with cabinet temperature

every 2 seconds, and 2 beeps every 10 seconds. During the alarm, pressing “RESET” on the

display board will silence the buzzer for 3 minutes. To reset the alarm, close the door.

j) COMMUNICATIONS ERROR (DUAL TEMPERATURE UNITS ONLY)

Dual temperature unit fails to communicate with other board. Refrigerator board and freezer

board are not communicating properly to delay the compressor interval at start-up of one unit

to another.

Display: “E10” is displayed and alternates every two seconds with cabinet temperature.

Buzzer: Buzzer sounds 10 beeps every 10 seconds.

Reset: Resets automatically if communication is restored.

Silence: Press “RESET” on display to silence buzzer for 18 hours.

4) DEFROST

a) FOR FREEZERS

This unit is preset at the factory to defrost 4 times per day for general conditions. However, if it

is determined that this interval does not suit the actual conditions the unit is exposed to, the

interval can be altered. To make a change of this sort, enter the GUARDED ACCESS MENU

[See “2)”], press “ENTER” one time. Now “dF #” is displayed (where “#” is the number of

defrosts the unit will activate in a 24 hour period) . Use the up/down arrows to change the

number of defrosts to the desired value. The minimum number of defrosts is 1 in a 24 hour

period, the maximum number of defrosts is 8 in a 24 hour period. Please note that the defrost

is a heated defrost, and therefore will have a tendency to raise the cabinet temperature.

Cabinet temperature is not displayed during defrost; “dEF” is displayed in its place.

Note: The change in the defrost setting will take effect after the next defrost based

on the previous setting. If it is desired that this change in interval timing take

effect immediately, turn the unit off and back on. The next defrost will take

effect "x" hours after power is resupplied. For example, if set df 4, x=6, the

next defrost will take place 6 hours from the time that power is applied.

b) FOR REFRIGERATORS

This unit uses an off-cycle defrost. A sensor in the evaporator coil determines the need for a

defrost. When the sensor reaches the initiation setpoint, the unit enters defrost. When the unit

reaches the termination setpoint, the unit ends defrost. The off-cycle defrost requires no

programming; it automatically initiates and terminates.

Note: In the program menu (#1=T set, #2=dF set, #3=° F or °C set), dF=x has

no effect. This is displayed because the same board is used for freezer units,

which require a time-initiated defrost.

5) START-UP DELAY

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.

Note: On Dual Temp units, there will be approximately 10 seconds delay between one

compressor start (i.e. Freezer) and the next compressor start (i.e. Refrigerator).

6) PERIMETER FRAME HEATER

This unit is equipped with a perimeter frame heater. This prevents the formation of condensate

on the front frame of the unit under high humidity conditions. If operating the unit under

conditions where condensate will not form, these heaters may be turned off using the switch

on the Control Box.

The Display Board for SafeTemp models is located on the face of the Refrigeration Circuit, behind

the Front Panel. Upon lifting and positioning the Front Panel in the locked position, the Display

Board can be accessed. From the Display Board, various controls and functions can be adjusted.

1) TEMPERATURE DISPLAY

• The cabinet temperature is displayed in °F only.

• The cabinet temperature is updated every 2 seconds.

• When the Fan, Compressor and Defrost are initiated, the corresponding indicator lights will

switch on.

2) SETTING MENU

1. Press Set

2. Display reads: SP1

3. Press Set

4. Display reads: Current Setpoint

5. Use Up/Down Arrow to change setpoint

6. Press Set to store. If no button is pressed in 15 seconds, display will go to normal, and the

setpoint will remain unchanged.

• Setpoint is the temperature that the compressor will come on.

• For Refrigerators, -5 °F is the temperature differential for the compressor to turn off.

For Freezers, the temperature differential is -6 °F.

• For Refrigerators, the Setpoint is adjustable from 37 °F to 55 °F.

For Freezers, the range is adjustable from -10 °F to 28 °F.

3) ALARM / ALERT SIGNALS

• This unit has no alarm codes.

12. ELECTRONIC CONTROL OPERATION (SafeTemp Models)

4) DEFROST

a) FOR FREEZERS

This unit is preset at the factory to defrost 4 times per day for general conditions. Please note

that the defrost is a heated defrost, and therefore will have a tendency to raise the cabinet

temperature. Cabinet temperature is not displayed during defrost; “dEF” is displayed in its

place.

b) FOR REFRIGERATORS

This unit uses an off-cycle defrost. A sensor in the evaporator coil determines the need for a

defrost. When the sensor reaches the initiation setpoint, the unit enters defrost. When the unit

reaches the termination setpoint, the unit ends defrost. The off-cycle defrost requires no

programming; it automatically initiates and terminates.

5) DEFAULT FACTORY SETTINGS

The SafeTemp Freezer has a default setpoint of 0° F. The Automatic Defrost is Time

initiated every 6 hours and Temperature terminated.

The SafeTemp Refrigerator has a default setpoint of 39° F and an Automatic (Temperature

initiated/terminated) Defrost.

6) START-UP DELAY

For both Refrigerators and Freezers, 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 minute delay before the

compressor will start. In addition, for Freezers, Defrost will be initiated at power-up.

7) COMPRESSOR SHORT CYCLE TIMER

There is a 2 minute minimum off-time and on-time for the compressor.

• Any time the compressor is started, it will keep running for a minimum of 2 minutes.

• Any time the compressor is turned off, it will stay off for a minimum of 2 minutes.

Note: Time may vary with Pressure Switch activation.

13. DOOR REVERSING (EXCLUDING GLASS DOOR MODELS)

This unit is provided with a cabinet design which, after being delivered to the

installation location, permits changing the door swing from left to right or right to left.

To change door swing, special accessories are required. If installed improperly, the

doors will not close and seal correctly. Contact your local HOSHIZAKI distributor if door

reversing is desired.

8) SAFETY DEVICES

a) Pressure Switch

• When pressure on the high-side of the unit is detected to be above a preset limit

(determined by Hoshizaki Specifications), a Pressure Switch will activate causing

power to be interrupted to the compressor relay. This power interruption will shut

down the compressor.

• Pressure Switch will reset automatically.

• When the Pressure Switch resets, power will be resupplied to the compressor.

Note: Time may vary with Pressure Switch activation.

b) Compressor Protector

• When a combined temperature/amperage value is above the limit specified by the

compressor manufacturer, a Protector will operate independently, turning off the

compressor. The compressor will restart when this protector has reset.

• Compressor Protector resets automatically.

• If the Condenser Fan is operating and the compressor is off, it is most likely that the

protector has operated.

c) Defrost Protection

For Freezers, primary Defrost Termination is controlled by the Defrost Thermistor. However, two

additional safeties are also present.

1. Time Termination - 1 hour maximum

2. Temperature Termination - Measured by a separate device that is in-line with the heaters

and independent of the Control Board.

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Hoshizaki American, Inc. RFH3-SSB-J-2 User manual

Hoshizaki American, Inc. RFH3-SSB-J-2 User manual

Hoshizaki American, Inc. RFH3-SSB-J-2 User manual

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