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ROUTINE 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 of cabinet
Ŷ Clean the unit once a month. Regular cleaning keeps the unit looking new.
Ŷ Use a dry cloth to wipe off small amounts of dirt on the outside and inside of the unit and all accessories.
If the outside panels are dirty, clean them with a diluted neutral dishwashing detergent. (Undiluted
detergent can damage the plastic components. For the dilution, refer to the instruction of the detergent.)
After the cleaning with the diluted detergent, always wipe it off with a wet cloth. Then wipe off the
cabinet or accessories with a dry cloth.
Ŷ Never pour water onto or into the unit. Doing so can damage the electric insulation and cause failure.
Ŷ The compressor and other mechanical parts are completely sealed. This unit requires absolutely no
lubrication.
Ŷ Remove the frost on the inner lid once a month.
Ŷ Press the back-up test switch once a month to check the back-up system operation when the back-up
system is installed.
Defrosting
The frost is built on the inside wall of the chamber and inner lid. The excessive frost possibly makes
some gap between the cabinet and door gasket, which may cause poor cooling. Remove the frost with a
scraper enclosed with the unit. Following shows the procedure for removing the heavy frost.
Note: For removing the frost, do not use a tool with sharp edge such as a knife or a screw driver.
1. Move all the contents in the chamber to another low temperature freezer or a tank refrigerated with
liquid N
2
or CO
2
gas (or dry ice).
2. Turn off the remote alarm switch and back-up switch (when installed).
3. Disconnect the power cord from the dedicated outlet.
4. Open the freezer door and remove the inner lid. Keep the freezer as it is until the frost is removed
completely.
5. Wipe out the water that has left in the chamber.
6. Start-up the freezer by following the procedure on page 13 “Start-up the unit”.
7. Once the chamber temperature has dropped to the desired temperature, place the original contents
back in the freezer chamber.