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Operation
Temperature Recorder (optional)
The blood bank refrigerator is equipped with a 6-inch temperature recorder for the chamber
temperature. When the unit is powered up, the recorder starts working.
For proper operation of the temperature recorder, please follow the procedures below.
a)Open the recorder door to access the recorder.
b)Plug in the 9 volt battery located on the upper right corner of the recorder. This battery is a
standby power.
c)Install a new chart by following the diagram below.
1.Installation and Operation
(Figure 6) Chart Adjustment Buttons
9 volt battery
Chart Adjustment Buttons
Imprinting Stylus
Date Reference Mark
Center Nut and Chain
Chart Paper
(Figure 5)
2.Power Supply
Replacement of Recorder Battery
The recorder normally uses AC power supply as the refrigerator operates. If the AC power supply
malfunctions, the LED indicator flashes to alert a power supply failure. The recorder continues to
operate on its standby battery to track the refrigerator temperature. The typical battery can sustain the
chart operation for about 30 hours. Please be aware that a weak battery should be replaced to avoid
corrosion in the connector buttons. The battery power can be saved by disconnecting the connector
button when the unit is not in service. During normal usage, make sure that the battery is plugged in to
power the recorder in case of an AC power outage. The LED indicator glows continuously until the main
power supply is on and the standby battery is replaced. When the battery is low, the LED indicator
flashes to indicate that the battery needs to be replaced.
When the green LED on the recorder flashes, there are two ways to inspect the unit.
Operation
Control Panel
1)Temperature Indicator
This refrigerator is factory preset to run at 5 . The high temperature alarm is set at 10 , the low
temperature alarm is set at 2 .
1
2
3
4
5
Operation
Push Button Display
Definition
of display
Plug in the unit, power is on
Push temperature display
button
Push temperature display
button
Push temperature display
button
Repeat Step 2
Average Temperature in
Sensor Bottle
Upper sensor bottle
temperature
Lower sensor bottle
temperature
Average Temperature in
Sensor Bottle
Average
Temperature
Upper sensor
bottle
temperature
Lower Sensor
bottle
temperature
Average
Temperature
Note: The digital display indicates either the upper bottle temperature or the lower bottle temperature
respectively. The displayed temperature does not always stay at 5 . The temperature sensor
represents the average temperature inside the refrigerator.
Defrost Cycle
This blood bank refrigerator has two automatic defrost cycles.
To maintain a constant temperature inside the blood bank, the refrigeration system cycles on and off
according to the temperature demand. When the refrigeration compressor cycles off, a small electric
heater is energized to thaw the frost off the evaporator surface. The function does not have an obvious
impact to the chamber temperature.
When the environmental humidity is too high or the products loaded into the refrigerator emit much
moisture, cycle defrost will not be sufficient to remove all frost and ice accumulated on the evaporator
surface. The equipment will start the forced defrost cycle. Once the frost is thawed, the refrigerator will
resume normal operation. During the defrost process, the temperature of a 200-ml blood bag would
probably rise by 1~ 2 .
1)Cycle defrost
2)Forced defrost cycle
Table 1, Temperature Indication