Temperature Display; Defrost Cycles - Sanyo BLOOD BANK MBR-304DR Instruction Manual

OPERATING INSTRUCTIONS

Temperature display

The unit is set at the factory to obtain the proper temperature automatically (4
need to set the temperature.
Table 1. Temperature display
Operation
Plug-in the power
1 supply cord and turn on
the power switch.
Press the temperature
2
display key.
Press the temperature
3
display key.
Press the temperature
4
display key.
5 Repeat from step 2.
Note:
The displayed temperature represents the temperature sensed by a thermal sensor attached to the
monitor bottle mounted to the upper and lower portion of the chamber.
The displayed temperature may not always be at 4
of high and low average temperatures within the chamber.

Defrost cycles

There is no need for routine defrosting of the unit as this occurs automatically as follows:
1. Cycle defrost
To keep the chamber temperature stable, the refrigeration compressor is cycled on and off. During "off"
period any frost which has accumulated on the evaporator is melted by energizing a defrost heater. This
will not have any discernible effect on the chamber temperature.
2. Forced defrost
When the ambient humidity is high, or a large amount of damp product is being stored inside the chamber,
there is a possibility that cycle defrost may not be enough to remove all of the frost on the evaporator. In
this case, a forced defrost cycle can be initiated.
When the unit is operating under a forced defrost cycle, the current chamber temperature and "dF" is
displayed alternately on the digital temperature display.
Once the forced defrost cycle is completed, normal operation resumes.
The temperature of blood bag (400mL) in the chamber rises by approximately 1 to 2
defrosting.
●: Lamp ON ○: Lamp OFF
Key operated
Average monitor bottle
-----
temperature
Upper monitor bottle
UPPER
LOWER temperature
Lower monitor bottle
UPPER
temperature
LOWER
Average monitor bottle
UPPER
temperature
LOWER
o
C. Because the chamber probes are representative
17
o o
C±1 C). There is no
Display
● UPPER
● LOWER
● UPPER
○ LOWER
○ UPPER
● LOWER
● UPPER
● LOWER
o
C during the
Display mode
Average temperature
Upper temperature
Lower temperature
Average temperature