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10
FREEZER COMPONENTS
Control panel
1. Power switch (POWER): Power all functions except remote alarm and back-up system (Option).
2. Battery switch: It is the switch of the battery for the power failure alarm. Turn it on usually. Turn
it off when you do not drive for a long time. (More than 1 month)MDF-793C is not equipped.
3. Temperature setting key. (PV/SV): This key has functions.
PV: Present freezer compartment temperature is displayed.
SV: Setting temperature is displayed. When the desired temperature is set, this key should be
pressed (SV side). The temperature setting can be done by using (4),(5),(6), keys, initial setting
temperature is -80
o
C.
4. Digit shift key ( ): The digit of the figure displayed for temperature adjustment can be shifted
using this key.
5. Numerical value shift key ( ): The figure that is displayed digitally can be changed by pressing
this key.
6. Enter key (ENT): When the desired temperature is reached, press this key. Operation will
commence toward this new point.
7. Alarm test key (ALARM): Check that the alarm lamp and the buzzer are functional when the
freezer is operating well.
8. Alarm buzzer stop key (BUZZER): To stop the alarm from sounding, press this key. Should a
further abnormality occur, the buzzer will sound automatically.
9. Alarm lamp (ALARM) and buzzer: they operate in the following cases:
a) Break down or power failure at the power supply.
- Alarm lamp blinks, buzzer sounds.
b) Temperature rises about 10
o
C higher than the setting temperature.
- Alarm lamp blinks, buzzer sounds about 12 minutes later.
10. Filter check lamp (FILTER CHECK): This lamp blinks and buzzer sounds when the condenser
filter is clogged. Clean the condenser filter according to page 18 “Cleaning of condenser filter”.
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