Sanyo MDF-593, MDF-793, MDF-593AT, MDF-793AT User Manual

INSTRUCTION MANUAL

MDF-593 MDF-593AT

Ultra Low Temperature Freezer

MDF-793 MDF-793AT

MDF-793AT

MDF-593AT

Note:

1. No part of this manual may be reproduced in any form without the expressed written permission of SANYO.

2. The contents of this manual are subject to change without notice.

3. Please contact SANYO if any point in this manual is unclear or if there are any inaccuracies.

CONTENTS

PRECAUTIONS FOR SAFE OPERATION P. 2

CAUTIONS FOR USAGE P. 7

ENVIRONMENTAL CONDITIONS P. 9

FREEZER COMPONENTS P. 10 INSTALLATION P. 13

START-UP OF UNIT P. 15

OPERATING INSTRUCTIONS P. 16

TEMPERATURE RECORDER P. 21

ROUTINE MAINTENANCE P. 23 TROUBLESHOOTING P. 24 DISPOSAL OF UNIT P. 25 RECYCLE OF NICKEL-CADMIUM BATTERY P. 26 SPECIFICATIONS P. 27

PERFORMANCE P. 27

SAFETY CHECK SHEET P. 28

PRECAUTIONS FOR SAFE OPERATION

It is imperative that the user complies with this manual as it contains important safety advice.

Items and procedures are described so that you can use this unit correctly and safely. If the precautions advised are followed, this will prevent possible injury to the user and any other person.

Precautions are illustrated in the following way:

WARNING

Failure to observe WARNING signs could result in a hazard to personnel possibly resulting in serious injury or death.

CAUTION

Failure to observe CAUTION signs could result in injury to personnel and damage to the unit and associated property.

Symbol shows;

 this symbol means caution.

 this symbol means an action is prohibited.

 this symbol means an instruction must be followed.

Be sure to keep this manual in a place accessible to users of this unit.

< Label on the unit > This mark is labeled on the cover in which the electrical components of high voltage are enclosed to prevent the electric shock.

The cover should be removed by a qualified engineer or a service personnel only.

WARNING

As with any equipment that uses CO equipment. It is important that you assess the work site to ensure there is suitable and sufficient ventilation. If restricted ventilation is suspected, then other methods of ensuring a safe environment must be considered. These may include atmosphere monitoring and warning devices.

gas, there is a likelihood of oxygen depletion in the vicinity of the

PRECAUTIONS FOR SAFE OPERATION

Do not use the unit outdoors. Current leakage or electric shock may result if the unit is exposed to

rain water.

Only qualified engineers or service personnel should install the unit. The installation by unqualified personnel may cause electric shock or fire.

Install the unit on a sturdy floor. If the floor is not strong enough or the installation site is not adequate, this may result in injury from the unit falling or tipping over.

Never install the unit in a humid place or a place where it is likely to be splashed by water. Deterioration of the insulation may result which could cause current leakage or electric shock.

Install a leak breaker on the power supply side when you use the unit in humid or wet situations, as well as installing an earth plate. Consult our shops or an electrician for these installations.

Never install the unit in a flammable or volatile location. This may cause explosion or fire.

Never install the unit where acid or corrosive gases are present as current leakage or electric

shock may result due to corrosion.

Use a dedicated power source is used as indicated on the rating label attached to the unit.

Remove dust from the power supply plug before inserting in a power source. A dusty plug or

improper insertion may cause a hazard.

Use a power supply outlet with ground (earth) to prevent electric shock. If the power supply outlet is not grounded, it will be necessary to install a ground by qualified engineers.

Never ground the unit through a gas pipe, water main, telephone line or lightning rod. Such grounding may cause electric shock in the case of an incomplete circuit.

Never store volatile or flammable substances in this unit. This may cause explosion or fire.

Never store corrosive substances in this unit. This may lead to damage to the inner components

or electric parts.

Disconnect the power supply to the unit prior to any repair or maintenance of the unit in order to prevent electric shock or injury.

WARNING

PRECAUTIONS FOR SAFE OPERATION

Ensure you do not inhale or consume medication or aerosols from around the unit at the time of

maintenance. These may be harmful to your health.

As with any equipment that uses CO vicinity of the equipment. It is important that you assess the work site to ensure there is suitable and sufficient ventilation. If restricted ventilation is suspected, then other methods of ensuring a safe environment must be considered. These may include atmosphere monitoring and warning devices.

Never splash water directly onto the unit as this may cause electric shock or short circuit.

Never disassemble, repair, or modify the unit yourself. Any such work carried out by an

unauthorized person may result in fire or injury due to a malfunction.

Disconnect the power supply plug if there is something wrong with the unit. Continued abnormal operation may cause electric shock or fire.

If the unit is to be stored unused in an unsupervised area for an extended period, ensure that

children do not have access and that doors cannot be closed completely.

The disposal of the unit should be accomplished by appropriate personnel. Always remove doors to prevent accidents such as suffocation.

Connect a carbon dioxide cylinder or a oxygen gas cylinder to this unit correctly. Incorrect

connection may cause explosion or fire.

Ventilate the room air when using the carbon dioxide gas for the back-up system. The CO density level in the air could rise and may be harmful to humans.

Make sure to prepare a safety check sheet when you request any repair or maintenance for the safety of service personnel.

WARNING

gas, there is a likelihood of oxygen depletion in the

PRECAUTIONS FOR SAFE OPERATION

Select a level and sturdy floor for installation. This precaution will prevent the unit from tipping.

Improper installation may result in water spillage or injury from the unit tipping over.

Connect the unit to a power source as indicated on the rating label attached to the unit. Use of any other voltage or frequency other than that on the rating label may cause fire or electric shock.

When removing the plug from the power supply outlet, grip the power supply plug, not the cord. Pulling the cord may result in electric shock or fire by short circuit.

Never damage or break the power supply plug or cord. Do not use the supply plug if its cord is loose. This may cause fire or electric shock.

Do not touch any electrical parts such as the power supply plug or any switches with a wet hand.

This may cause electric shock.

Do not put a container with water or heavy articles on the unit. It may cause injury if the articles fall. Current leakage or electric shock may be resulted form the deterioration of insulation by spilled water.

Do not climb onto the unit or do not put articles on the unit. This may cause injury by tipping or damage to the unit.

Do not put glass bottles or cans into the compartment since they may be broken by frozen contents and cause injury.

Put on dry gloves when you take out refrigerated articles from the freezer. Handing frozen contents or the inside walls with naked hands may cause frostbite.

Do not defrost inside walls using a knife or ice pick. There are pipelines for cooling behind the walls. Be careful not to damage the lines as this could cause a breakdown. Also, do not make a

hole in the wall for installation of attachments.

Always hold the handle when closing the door. This will reduce the likelihood of a trapped finger.

Check the filter mentioned in this manual and clean it as necessary. A dusty filter may cause

temperature rise or failure.

Check the setting temperature when starting up the operation after the power failure or power off. A change of set temperature may cause damage to contents.

CAUTION

PRECAUTIONS FOR SAFE OPERATION

Do not touch the condenser directly when the filter is removed for cleaning. This may cause injury

by hot surface.

Always disconnect the power supply plug before moving the unit. Take care not to damage the power cord. A damaged cord may cause electric shock or fire.

Be careful not to tip over the unit during movement to prevent damage or injury.

Always disconnect the power plug when the unit is not used for long periods.

Do not put the packing plastic bag within reach of children as suffocation may result

CAUTION

CAUTIONS FOR USAGE

￭ Always use a dedicated power source. The power source of this freezer is single phase and local voltage. The power source should be the dedicated circuit with a dedicated breaker. Do not connect this freezer to the branch circuit for other electric appliances.

￭ For AT type, turn OFF the back-up switch at the time of opening of the freezer door when a liquid CO gas cylinder is connected to the back-up system.

￭ Put on dry gloves when you take out refrigerated articles from the freezer. Handing frozen contents or the inside walls with naked hands may cause frostbite.

￭ For the cleaning of the unit, use a cloth containing diluted neutral dishwashing detergent Undiluted detergent may break the plastic parts. For the dilution, follow the instruction enclosed with the detergent. When a diluted neutral dishwashing detergent is used to clean the unit, wipe the unit thoroughly with a cloth soaked in clean water. Then wipe the unit with a dry cloth to eliminate the moisture.

￭ Do not clean the unit with scrubbing brushes, acid, thinner, solvents powdered soap, cleanser or hot water. These agents can scratch the paint or cause it to peel. Plastic and rubber parts can be easily damaged by these materials. Especially never use any volatile solvent to clean the plastic or rubber parts.

￭ The cooling pipe is routed in the rear of the freezer. Never use a knife or a screw driver, etc. to remove the frost. They may cause damage of chamber wall or improper operation of the unit. And do not make any holes for attaching accessories on the freezer wall.

￭ The digital thermometer of this unit is designed to display the temperature of the center part of the freezing compartment. Although the thermometer sometimes display a temperature about 2 than the actual temperature of the center part, it gradually approaches the real temperature.

￭ Do not put too many warm articles into a freezer compartment before enough operating. Put items in a few at a time after the freezer compartment temperature has cooled enough.

￭ The space near the freezer compartment door, about 10 cm from the inner lid, sometimes shows a higher temperature than the center part. The difference is about 5 long term storage.

￭ Before operating the freezer, an inner lid should be put in to reduce temperature difference between top and bottom of the freezing compartment.

￭ When it is desired to place an instrument requiring measuring cable and power cord in the cabinet, the cable and cord can be led through the access port provided on the left side wall on the cabinet. After installation, replace a rubber cap and insulation as they are. Failure to use a rubber cap or insulation can interfere with the proper lowering of temperature and lead to condensation on the outside of the port.

C higher

C; the lower part may be better for

CAUTIONS FOR USAGE

￭ This unit is provided with the filter check lamp. If the filter check lamp is flashed, clean the condenser filter. Refer to page 23 “Cleaning of condenser filter”. A clogged filter may cause poor cooling and compressor trouble.

￭ When connecting a liquid CO of a neighboring engineering shop of high pressure gas.

￭ Leave the remote alarm switch “OFF” until the inside temperature of the freezer reaches the appropriate level. Leave the back-up system switch “OFF” as well for AT type. After the inside temperature reaches the appropriate level, set the needle for the warning device operation of the temperature recorder.

￭ When the unit is first installed, or re-started after long period of no use, the power failure alarm may not operate, because its Cadnica batteries have completely discharged. This does not denote a malfunction. In this case, continue to operate the unit for about 3 hours. To fully recharge the completely discharged batteries, the unit has to be operated for about 2 days.

￭ Cover the control panel with the control panel cover to avoid the malfunction resulting from an accidental contact with control panel (such as power switch OFF).

cylinder for the back-up system of AT type freezer, consult your dealer

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