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MAINTENANCE
WARNING
Always disconnect the power supply to the unit prior to any repair or maintenance of the unit in
order to prevent electric shock or injury.
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.
Cleaning
￭ Clean the unit once a month. Regular cleaning keeps the unit looking new.
￭ Use a dry cloth to wipe off small amounts of dirt on the outside and inside of the unit and all
accessories. If the unit is very dirty, use a neutral detergent.
￭ After cleaning, wipe away the cleaner completely with a cloth washed in clean water.
￭ Never pour water onto or into the unit. Doing so can damage the electric shock or short circuit.
￭ The compressor and other mechanical part are completely sealed. This unit requires absolutely no
lubrication. There is a fan behind the compressor, so be very careful if you stick your hand into this part
of the unit.
￭ For MDF-192AT, press the back-up test switch once a month to check the back-up system operation.
Defrosting
The frost forms on the wall and surrounding of inner lid. Too much frost prevents the door from be
closed tightly and decreases the cooling performance. To avoid such condition, remove the frost as
necessary.
Note: Never use a tool with sharp edge like a knife or screw driver for defrosting.
Defrost the inside wall of the freezer as follows:
Normal defrosting
Remove the frost by the enclosed scraper.
Thorough defrosting
1. Take out and transfer all the contents to another freezer or container which contains liquid CO
N
, or dry ice. Switch off the remote alarm and back-up system (MDF-192AT only). Switch off the
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power supply.
2. Open the door and remove the inner lid. Leave the freezer as it is. The water remaining in the
freezer compartment should be wiped up.
3. After cleaning is completed, restart the operation according to the procedure on page 15.
4. Put back the articles into the sufficiently cooled freezer chamber.
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, liquid
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