Operation
Temperature Recorder (optional)
The blood bank refrigerator is equipped with a
1.Installation and Operation
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.
9 volt battery
Chart Adjustment Buttons
Imprinting Stylus
Date Reference Mark
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| (Figure 6) Chart Adjustment Buttons | |
Center Nut and Chain |
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Chart Paper | ||||
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(Figure 5)
2.Power Supply
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.
Replacement of Recorder Battery
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
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Table 1, Temperature Indication
| Operation | Push Button | Display | Definition | ||
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| Plug in the unit, power is on |
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| Average Temperature in | Average |
1 |
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| Sensor Bottle | ||
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| Temperature | |||
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| Push temperature display |
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| Upper sensor bottle | Upper sensor |
2 |
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| temperature | bottle | |
button |
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| temperature | |
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| Push temperature display |
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| Lower sensor bottle | Lower Sensor |
3 |
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| temperature | bottle | |
button |
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| temperature | |
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| Push temperature display |
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| Average Temperature in | Average |
4 |
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| Sensor Bottle | ||
button |
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| Temperature | ||
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5 | Repeat Step 2 |
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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.
1)Cycle defrost
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.
2)Forced defrost cycle
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 
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