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ROUTINE MAINTENANCE
Defrosting of chamber
After long term use of this unit, the frost is built on the inside wall of the chamber and inner lid. The
excessive frost possibly make some gap between the cabinet and door gasket, which may cause poor
cooling. Remove the frost.
●
For defrosting a light frost around the inner lid.
Remove the frost on the inner door with a scraper enclosed with the unit.
Note:
For removing the frost, do not use a tool with sharp edge such as a knife or a screw driver.
●
For defrosting a heavy frost.
1.
(When an optional backup cooling kit MDF-UB5 is installed) Turn OFF the backup power switch.
2.
Turn OFF the battery switch for power failure alarm.
3.
Take out and transfer all the contents to another freezer or a container which is refrigerated by liquid
carbon dioxide or dry ice.
4.
Turn OFF the power switch of the unit.
5.
Remove the inner lids, and leave the unit as it is.
6.
The water accumulated on the bottom of the chamber should be wiped up with a dry cloth.
7.
After cleaning the chamber, start up the unit according to the procedure on page 16.
8.
Turn ON the battery switch for power failure alarm.
9.
Make sure that the chamber is sufficiently cooled. After that, put back the contents to cryopreserve into
the chamber.
10.
(When an optional backup cooling kit MDF-UB5 is installed) Turn ON the backup power switch.
CALIBRATION
During running operation, the following service works must be performed;
･
Perform temperature calibration at least once a year.
For the temperature calibration, contact our sales representative or agent.
