KRATOS 68K-759HC User manual

12/10/2020 PK
SERVICE, INSTALLATION AND INSTRUCTION MANUAL
68K-759HC, 68K-773HC
69K-887HC, 69K-888HC
REACH-IN REFRIGERATOR
PLEASE READ CAREFULLY

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TABLE of CONTENTS
INTRODUCTION .......................................................................................................................................................................... 3
SERIAL NUMBER INFORMATION ............................................................................................................................................. 3
RECEIVING AND INSPECTING THE EQUIPMENT ................................................................................................................. 4
APPLIANCE SAFETY .................................................................................................................................................................... 4
IMPORTANT SAFEGUARDS ........................................................................................................................................................ 5
Electrical Connection ................................................................................................................................................................... 6
Refrigerant Disposal .................................................................................................................................................................... 6
Appliance Disposal ...................................................................................................................................................................... 6
APPLIANCE INSTALLATION ...................................................................................................................................................... 7
Remove Packaging Materials ....................................................................................................................................................... 7
Location Requirements ................................................................................................................................................................ 7
Inside cabinet: .............................................................................................................................................................................. 7
Outside cabinet: ............................................................................................................................................................................ 7
Installation Clearance ................................................................................................................................................................... 8
Leveling ....................................................................................................................................................................................... 8
Stabilizing .................................................................................................................................................................................... 8
Electrical Connection ................................................................................................................................................................... 8
OPERATION ................................................................................................................................................................................... 9
Refrigerated cycle ........................................................................................................................................................................ 9
Power Switch: .............................................................................................................................................................................. 9
SOLID-STATE THERMOSTAT DE SC RI PT IO NS ......................................................................................................................... 9
1. FRONT PANEL COMMANDS. .............................................................................................................................................. 9
2. MAIN FUNCTIONS .............................................................................................................................................................. 10
3. ALARM SIGNALLING ........................................................................................................................................................ 10
TIPS FOR PROPER OPERATION, CLEANING AND MAINTENANCE ................................................................................. 11
CLEANING AND MAINTENANCE ........................................................................................................................................... 12
Exterior and Interior Cleaning of Appliances ............................................................................................................................ 12
Cleaning the Condenser Coil ..................................................................................................................................................... 12
Stainless Steel Care and Cleaning .............................................................................................................................................. 13
Gasket Maintenance ................................................................................................................................................................... 13
Doors/Hinges ............................................................................................................................................................................. 13
Drain Maintenance ..................................................................................................................................................................... 13
TROUBLESHOOTING GUIDE ................................................................................................................................................. 14
TROUBLESHOOTING CHART .................................................................................................................................................. 14
SERVICE AND TROUBLESHOOTING TIPS ............................................................................................................................. 15
DIMENSIONS AND TECHNICAL INFORMATION .................................................................................................................. 16
COMPONENT INFORMATION ................................................................................................................................................ 17
REFRIGERATION DIAGRAM .................................................................................................................................................... 17
WIRING DIAGRAMS .................................................................................................................................................................. 18
PARTS ............................................................................................................................................................................................ 19

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READ THIS MANUAL IN ITS ENTIRETY
TO HELP FAMILIARIZE YOURSELF WITH YOUR NEW EQUIPMENT BEFORE PROCEEDING.
We have provided many important safety messages in this manual.
Always read and obey all safety messages.
Understanding of safety messages will assist in alerting you to potential hazards, as well as tell you
how to reduce the chance of injury. Follow the instructions as outlined in this manual.
INTRODUCTION
This user’s manual is intended for installing, using and servicing your Argus appliance. It is recommended that this
manual be kept in an accessible place. Every Argus machine is designed and manufactured according to the highest
standards of safety and performance. It meets or exceeds UL 471 safety standards and sanitation standard NSF 7.
Argus assumes no liability or responsibility of any kind for products manufactured by Argus that have been altered in any
way, including the use of any parts and/or other components not specifically approved by Argus.
Argus reserves the right to make design changes and/or improvements at any time. Specifications and designs are
subject to change without notice.
SERIAL NUMBER INFORMATION
l The serial number of all self-contained freezers is located inside the unit on the left hand side near the top on the wall.
l Always have the serial number of your unit available when calling for parts or service.
Due to periodic changes in designs, methods, procedures, policies and regulations, the contents of this manual are subject
to change without notice. While we exercise good faith efforts to provide information that is accurate, we are not responsible
for errors or omissions in information provided or conclusions reached as a result of using this reference manual. By using
the information provided rather than simply using it for reference purposes, the user assumes all risks in connection with
such use.

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RECEIVING AND INSPECTING THE EQUIPMENT
Even though most equipment is shipped crated, care should be taken during unloading so the equipment is not damaged
while being moved into the building.
1. Visually inspect the exterior of the package and skid or container. Any damage should be noted and reported to the
delivering carrier immediately.
2. If the damage appears minor, open and inspect the contents with the carrier. Ta ke pho tog ra p hs of th e p ac k ag ing be for e i ts
opened. If the carrier is impatient & won’t wait, return the goods if the damage appears to be anything more substantial then
superficial harming of the external protective packing layers.
3. In the event that the exterior is not damaged, yet upon opening, there is concealed damage to the equipment, notify the
carrier. Notification should be made verbally as well as in written form.
4. Request an inspection by the shipping company of the damaged equipment. This should be done within 10 days from
receipt of the equipment.
5. Be certain to check the compressor compartment housing and visually inspect the refrigeration package. Be sure lines are
secure and base is still intact.
6. Freight carriers can supply the necessary damage forms upon request.
7. Retain all crating material until an inspection has been made or waived.
APPLIANCE SAFETY
Always read and obey all safety messages.
This is the Safety Alert Symbol. This symbol alerts you to potential hazards that can injure or kill you
and others. All safety messages will follow the Safety Alert Symbol and either the words “DANGER”,
“WARNING” OR “CAUTION”.
DANGER
DANGER means that failure to heed this safety statement may result in Death or Severe Personnel Injury.
WARNING
WARNING means that failure to heed this safety statement may result in extensive product damage, serious
personal injury, or death.
CAUTION
CAUTION means that failure to heed this safety statement may result in minor or moderate personal injury, or
property or equipment damage.
All safety messages will alert you to what the potential hazard is, tell you how to reduce the chance of injury, and let you
know what can happen if the instructions are not followed.
NOTE: IMPORTANT SAFETY INSTRUCTIONS
WARNING
To reduce the risk of fire, electric shock or injury, when using your appliance, follow these basic precautions:
l Plug into grounded 3-prong outlet.
l Do not remove grounding prong.
l Do not use an adapter.
l Do not use an extension cord.
l Disconnect power before cleaning.
l Disconnect power before servicing.
l Use 2 or more people to move and install appliance.
SAVE THESE INSTRUCTIONS

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IMPORTANT SAFEGUARDS
Before the appliance is used, it must be properly positioned and installed as described
in this manual, so read the manual carefully. We strongly recommend that you have a
professional install your new machine. The warranty may be affected or voided by
an incorrect installation. To reduce the risk of fire, electrical shock or injury when
using the appliance , follow basic precautions, including the following:
DANGER
• It is recommended that a separate circuit, serving only your appliance, be provided. Use receptacles that cannot
be turned off by a switch or pull chain.
• Please ensure that the required voltage is being supplied at all times.
• The unit should be plugged into a grounded and properly-sized electrical outlet with appropriate over-current
protection.
• Ensure unit is not resting on or against the electrical cord.
• Do not connect or disconnect the electric plug when your hands are wet.
• Never unplug the appliance by pulling on the power cord. Always grip the plug firmly and pull straight out from the
outlet.
• Never clean appliance parts with flammable fluids. Do not store or use gasoline or other flammable vapors and
liquids in the vicinity of this or any other appliance. The fumes can create a fire hazard or explosion.
• Before proceeding with cleaning and maintenance operations, make sure the power line of the unit is disconnected.
• Unplug the appliance or disconnect power before cleaning or servicing. Failure to do so can result in electrical
shock or death.
• If the unit is not in use for a long period of time, best to unplug the unit from the outlet.
• After unplugging or a power outage to the unit, wait at least 10 minutes before plugging it back in. Failure to do so
could cause damage to the compressor.
• Do not operate the appliance with a frayed or crimped power cord.
• Do not attempt to repair or replace any part of your appliance unless it is specifically recommended in this manual. A
qualified technician should do all other servicing or repairs.
WARNING
• Use two or more people to move and install appliance. Failure to do so can result in back or other injury.
• This appliance must be properly installed and located in accordance with the Installation Instructions before it is used.
• Do not touch the cold surfaces in the appliance compartment when hands are damp or wet. Skin may stick to these
extremely cold surfaces.
• Setting temperature controls to the ZERO (0) position does not remove power from the appliance, it must be turned
off at the unit appliance circuit breaker or by unplugging it.
• To ensure proper ventilation for your appliance, choose a well-ventilated area with temperatures above 50ºF
(10ºC) and below 86ºF (30ºC). If in an environment with a temperature between 86 and 104ºF (30 to 40ºC) use of
a fan blowing into the utility compartment or similar auxiliary cooling of that area is required. This unit MUST be
installed in an area protected from the elements, such as wind, rain, water spray or drips.
• The appliance should not be located next to ovens, grills or other sources of high heat.
• It is important for the appliance to be level for proper operation. You may need to make adjustments to level it.
• Remove the packing materials & be sure to discard them as the work area is policed. Clean the appliance before using.
• Do not use this apparatus for other than its intended purpose.
• Only trained, qualified personnel should attend to & monitor the appliance’s performance and upkeep.
• Do not attempt to use the shelving as a ladder.

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IMPORTANT SAFEGUARDS (cont.)
Electrical Connection
Do not, under any circumstances, cut or remove the third (ground) prong from the power cord. For personal safety,
this appliance must be properly grounded. The power cord of this appliance is equipped with a 3-prong grounding
plug that mates with a standard 3-prong grounding wall outlet to minimize the possibility of electric shock hazard from
the appliance. Have the wall outlet and circuit checked by a qualified electrician to make sure the outlet is properly
grounded. The appliance should always be plugged into its own individual electrical outlet which has a voltage rating
that matches the rating label on the appliance. This provides the best performance and also prevents overloading
house wiring circuits which could cause a fire hazard from overheated wires. Repair or replace immediately all power
cords that have become frayed or otherwise damaged. Do not use a cord that has been crimped, shows cracks or has
frayed insulation abrasion damage along its length or at either end. When moving the appliance, be careful not to
damage the power cord.
Power Surges
Connecting the unit to the incorrect voltage or oversized circuit protection (i.e. a breaker rated for over 20 amps) is not
covered by the appliance warranty. Neither is a damaged power cord, using unauthorized electrical components and/or
modifying the units wiring.
It is recommended that the appliance circuit doesn’t incorporate either a GFI breaker or outlet.
Any complications created by use of a GFI are not covered by the unit’s warranty as they are prone to inadvertently tripping
off to often.
Refrigerant Disposal
If you are throwing away your old appliance it may have a cooling system that uses “Ozone Depleting” chemicals. Make
sure the refrigerant is removed for proper disposal by a qualified service technician.
Appliance Disposal
Follow and comply with all applicable codes and ordinances, cut the plug off the electrical power cord, remove the
door(s) and discard the shelving. This prevents misuse of the unit after its been scrapped.

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APPLIANCE INSTALLATION
Remove Packaging Materials
IMPORTANT:
Do not remove any permanent instruction labels or the data label on your appliance.
• Remove tape and glue from your appliance before using.
• To remove any remaining tape or glue, rub the area briskly with your thumb. Tape or glue residue can also be
easily removed by rubbing a small amount of liquid dish soap over the adhesive with your fingers. Wipe with
warm water and dry with a soft cloth.
• Do not use sharp instruments, rubbing alcohol, flammable fluids, or abrasive cleaners to remove tape or glue.
These products can damage the surface of your appliance.
NOTICE:
LOSS OR SPOILAGE OF PRODUCTS IN YOUR APPLIANCE IS NOT COVERED BY WARRANTY. IN ADDITION TO
FOLLOWING RECOMMENDED INSTALLATION PROCEDURES AFTER ITS BEEN SET IN PLACE, DON’T RUN THE
APPLIANCE 24 HOURS TO LET OIL IN THE REFRIGERANT LINE TO RE-EQUILIBRATE. (DON’T LOAD WITH
PRODUCT UNTIL THE UNIT TEMPERATURE HAS REACHED ITS SET POINT.)
Location Requirements
• Appliances represented in this manual are intended for indoor use only.
• Be sure the location chosen has a floor strong enough to support the total weight of the cabinet and contents as a
fully loaded unit can weigh as much as 1500 pounds.
• Reinforce the floor as necessary to provide for maximum loading.
• For the most efficient refrigeration, be sure to provide good air circulation inside and out.
Inside cabinet:
Do not pack the units so full that air cannot circulate. The refrigerated air is discharged at the top rear of the unit. It is
important to allow for proper air flow from the top rear to the bottom of the unit. Obstructions to this air flow can cause
evaporator coil freeze ups and loss of temperature or overflow of water from the evaporator drain pan. The shelves have
a rear turn up on them to prevent this. However, bags and other items can still be located to the far rear of the cabinet. Air
is brought into the evaporator coil with fans mounted to the front of the coil.
Outside cabinet:
Be sure that the unit has access to ample air. Avoid hot corners and locations near stoves and ovens.
It is recommended that the unit be installed no closer than 2" (51mm) from any wall, a max door swing clearance of 60.5
in. (1537mm) and with at least a 12" (305mm) of clear space above the unit. Adequate air flow (≤86º F) into the utility
compartment is needed to deliver proper performance and extend the appliance life.
WARNING
Excessive Weight Hazard
Use two or more persons to move and install appliances.
Failure to do so may result in back or other injury.

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APPLIANCE INSTALLATION (cont.)
Installation Clearance
Leveling
Ensure the floor where the unit is to be located is level. (It is ok to slope down from front to rear by up to 1/4” – it mustn’t
slope from the rear to the front.)
Stabilizing
All models are supplied with casters for your convenience. It is very important, however, that the cabinet be installed in a
stable condition with the front wheels locked while in use. Should it become necessary to lay the unit on its side or back for
any reason, allow at least 24 hours before start-up to allow compressor oil to flow back into place. Failure to meet this
requirement can cause compressor failure and unit damage which isn’t covered by the appliance warranty.
Reversing The Door (Single Door Models Only)
Single door models can be converted from right-hand hinged to left-hand hinged and vice-versa by removing the door
hinges from both the door and unit, reversing their locations and reattaching them, and re-hanging the door upside-down.
NOTICE:
Unit repairs will not be subject to standard unit warranties if due to improper installation procedures or
utilizing an unqualified installer technician to commission the unit.
Electrical Connection
Refer to the amperage data on the Technical Information table, the serial tag, your local code or the National Electrical Code
to be sure that unit is connected to the proper power source.
DANGER
The unit must be turned OFF and disconnected from the power source whenever performing
service, maintenance functions or cleaning the refrigerated area. Failure to comply may
result in Death or Severe Personnel Injury.
12” (305mm) clear space
2”
51mm
Single Door Models
Double Door Models
27 in
686 mm
27 in
686 mm
60.5 in
1537 mm
Max Door Swing
Clearance
60.5 in
1537 mm
Max Door Swing
Clearance

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OPERATION
Refrigerated cycle
Refrigerators: During the refrigeration cycle, the evaporator fans will run continuously even when one or more doors are
open. The door switch will activate the lights when opened on solid door models only. Glass door models lights are turned
on manually using a switch located next to the main power switch.
1. Every 6 hours, the unit will turn off and to allow the evaporator coil to air defrost. The controller now displays defrost
symbol. When the coil temperature reaches 53°F (12°C) or after 30 minutes of defrost, the unit will turn on again.
2. Anti-condensation heaters on door frames work in conjunction with the compressor.
3. Recommended holding temperature range: 34° to 41°F (1° to 5°C).
4. Comes factory set to 37°F (3°C).
Power Switch:
The power switch is located on the front of the bottom panel. When the unit is on, the switch will glow green.
SOLID-STATE THERMOSTAT DESCRIPTIONS
1. FRONT PANEL COMMANDS.
To display target set point; in programming mode it selects a parameter or confirm an operation.
To start a manual defrost.
In programming mode it browses the parameter codes or increases the displayed value.
In programming mode it browses the parameter codes or decreases the displayed value.
KEYS COMBINATION
To lock or unlock the keyboard.
To enter in programming mode.
To return to room temperature display.
1.1 Function of LEDS

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OPERATION (cont.)
2. MAIN FUNCTIONS
2.1 HOW TO SEE THE SET POINT
1. Push and immediately release the SET key, the set point will be showed;
2. Push and immediately release the SET key or wait about 5s to return to normal
visualization.
2.2 HOW TO CHANGE THE SETPOINT
1. Push the SET key for more than 2 seconds to change the Set point value;
2. The value of the set point will be displayed and the “°C” or “°F” LED starts blinking;
3. To change the Set value push the or arrows.
4. To memorize the new set point value push the SET key again or wait 10s.
2.3 HOW TO START A MANUAL DEFFROST
Push the DEF key for more than 2 seconds and a manual defrost will start
2.4 TO LOCK THE KEYBOARD
1. Keep pressed for more than 3s the and keys.
2. The “OF” message will be displayed and the keyboard will be locked. If a key is pressed more
than 3s the “OF” message will be displayed.
2.5 TO UNLOCK THE KEYBOARD
Keep pressed together for more than 3s the and keys till the “on”
message will be displayed.
3. ALARM SIGNALLING
3.1. ALARM RECOVERY
Probe alarms P1” and “P2” start some seconds after the fault in the related probe; they automatically
stop some seconds after the probe restarts normal operation. Check connections before replacing the
probe. Temperature alarms “HA” and “LA” automatically stop as soon as the temperature returns to normal values.
Alarms “EA” and “CA” (with iF=bL) recover as soon as the digital input is disabled.