16
OPERATING INSTRUCTIONS
Control panel
(Model MDF-U4086S, U5086W)
Functions of the controller at the control panel are as follows :
1. 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 2, 3, 4, key. Initial setting temperature is -86
o
C
NOTE
After power failure, setting temperature will be reset to the initial setting temperature -86
o
C . Set to the
initial setting temperature -86
o
C
2. Digit shift key (
):
The digit of the figure displayed for temperature.
3. Figure shift key ( ):
The figure that is displayed digitally can be changed by pressing this key.
4. Enter key (ENT):
When the desired temperature is reached, press this key. Operation commences
toward this new point.
5. Alarm test key (ALARM):
Check that the alarm lamp and the buzzer functional when the freezer is
operating well.
6. Buzzer key (BUZZER): To stop the alarm from sounding, press this key. Should a further
abnormality occur, the buzzer will sound automatically.
7. Alarm lamp (ALARM) and Buzzer:
They operate in the following cases:
a) Break down or power failure at the power supply.
Alarm lamp flickering , buzzer (sounds)
b) Temperature rises about 10
o
C higher than the setting temperature.
Alarm lamp flickering, buzzer (sounds about 10 minutes later)
c) The door is open.
Alarm lamp lighting, buzzer (sounds about 30 seconds later)
8. Filter check lamp (FILTER CHECK):
This lamp lights when the condenser filter is clogged. Clean
the condenser filter according to “MAINTENANCE”. (P. 22)
9. C
O2 Back up Lamp (CO2 BACK UP) : This lamp lights when CO2 back up switch is closed.
BUZZER
ALARM
PV/SV
ENT
ALARM
FILTER CHECK
TEMPERATURE(
o
C)
CO
2
BACK UP
9
7
1
2
3
4
5
6
8
