Behind the interior walls, there are many refrigeration tubes. Do not use a knife, an ice pick, or a
screwdriver to cut ice and frost. This may damage not only the liner but also the refrigeration tubes.
If the freezer is not in use for a long time, please turn off the power and switch off the backup
battery. The power cord should be unplugged.
Two access ports are installed in the back wall of the unit which can be used as the through hole
for the thermocouple wires during testing and validation. After all test wires are let through the
access port, make sure that the gap in the port is sealed properly with insulation materials.
Otherwise, the unit temperature may not come down to the desired temperature. The port ring in
the outer wall can also accumulate frost and ice
When the unit operates normally, the unit frame at the front near the door may be slightly warm.
This phenomenon is normal because hot tubing is embedded there to prevent condensation from
forming on the frame.
The temperature display indicates the temperature where the temperature sensor is mounted
inside the unit chamber, which may vary from the temperature at the center of the freezer, but it
will gradually reach the actual temperature of the freezer over time.
After the freezer runs for some time, a layer of frost usually forms on the interior liner and inner
doors. When this layer of frost get too thick, it can negatively impact the refrigeration performance
of the unit. Energy consumption can increase. If the thickness reaches about 5 mm, please use
the supplied scraper to remove the frost.
Before removing the frost, temporarily transfer the stored samples to another freezer. This is so
that the temperature does not rise in the unit and damage the samples
Usage Precautions
Before samples are loaded into the unit, make sure the unit temperature has reached the set point
then load the samples into the freezer in batches. Each batch should not exceed 1/3 0f the unit
capacity so that the temperature does not rise while samples are being loaded.
When cleaning the unit, mild or neutral detergent solution should be used. Never use a hard wire
brush, acid, gasoline, detergent powder, polishing powder, or hot water to dean the freezer as
these tools and materials can damage the paint coating and plastic components. Particularly,
never use gasoline or a solution with volatile chemicals to clean plastic or rubber parts.
Defrost the interior
Frost and ice can form in between the door gasket and frame to form an air gap, which can
decrease the refrigeration effect of the unit. Please use the provided plastic scraper to defrost the
interior doors.
The following steps are how to defrost:
1. Turn off any backup refrigeration system if there is one.
2. Remove the samples from the unit that needs to be defrosted. Move them to another unit or a
container for temporary storage.
3. Turn off the power supply.
4. Open the outer door and inner doors to let the unit thaw for a period of time.
5. Use a dry doth to soak up and remove any water on the floor of the unit
6. After defrosting the unit and cleaning up the water, restart the unit.
7. Load the samples back into the unit after it reaches the set temperature.
8. Turn on the backup refrigeration system if there is one.
Do not use any sharp tools such as knives or screwdrivers to defrost.
Battery maintenance
When the control panel shows an alarm signal for “Low Battery ”, please make sure the battery
switch is turned on, and the battery will be charged. After about one week of charging, please
recheck the battery capacity. If normal, the battery should be in full capacity. However, if the
capacity is still low. please change the battery.
The battery that supports the power outage alarm is a consumable item. The life expectancy for
the battery is 2 to 3 years. If the battery is more than 3 years old, the battery should be replaced
because the alarm function may not work properly. To do so, please contact an Haier Equipment
and Instrument Service Center.
Disposal of the freezer
If the unit is to be stored unused in an unsupervised area for an extended
period , ensure that children do not have access and that doors are locked
completely with a key.
The disposal of the unit should be accomplished by appropriate personnel .
Remove doors to prevent accidents such as suffocation .
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Do not dispose of electrical appliances as unsorted municipal waste, use separate collection
facilities.Contact you local government for information regarding the collection systems available. If
electrical appliances are disposed of in landfills or dumps, hazardous substances can leak into the
groundwater and get into the food chain, damaging your health and well-being.
Meaning of crossed –out wheeled dustbin:
