21
DEFROSTING
CAUTION
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.
Automatic defrosting
■ Defrosting is carried out in a short period of time by a special heater built into the evaporator.
■ During defrosting, the internal temperature may rise slightly, but this has almost no effect on the
temperature of the stored items, so leave them in the freezer during defrosting. During defrosting, dF
and the current chamber temperature is displayed alternately.
■ Water resulting from defrosting flows through into the evaporating tray, in which the water automatically
evaporates.
Note:
■ Automatic defrosting is carried out with 12-hour cycle. When the defrost key (DEF) for approximately
five seconds to start the defrosting process, the automatic defrosting of 12-hour cycle is started at this
point.
Manual defrosting
In case of manual defrosting, perform key operations as follows:
1. Press the defrost key (DEF) for approximately five seconds to start the defrosting process. During
defrosting, dF and the current chamber temperature is displayed alternately.
2. The unit automatically finishes the defrosting process and returns to normal operation.
Sub-heater switch
This freezer has a sub-heater for defrosting at the cold air outlet. When the sub-heater switch is ON, the
blockage by frost inside the cold air line can be prevented.
Normally, set this switch in ON position.
When this switch is OFF, pay attention to the following:
■ If this switch is OFF, the chamber temperature at the completion of defrosting is lower about 3
o
C than
that when the switch is ON. Therefore, when opening the door is not frequent and the sample is stored
for long period, OFF position is suitable.
■ When opening the door very often or freezing the samples again and again, set this switch in ON
position.
To Next Page
Loading...