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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 eff ect 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 fl oor 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.
Caution
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 ,
Warning
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 suff ocation .
24
Initially Powering Up
When the unit is started for the fi rst time, please follow the procedures below.
① While keeping the unit empty, plug in the power
cord to a dedicated power socket that meets all
requirements.
② Please connect the freezer to the power supply,
turn on the power switch located on the right of the
freezer (as in the illustration on the right), and then
turn on the battery switch.
③ If the unit has a backup cooling system (optional),
turn off the backup system.
④ Set the unit to a desired temperature: Do not load the unit with any samples. Power up the
unit to let it run down to -60℃ . Let it run at -60℃ for 8 hours then lower it to -80℃ . Observe the
unit performance for 24 hours for normal cycling to ensure that it is working properly.
⑤ Once the unit is confi rmed to be operating properly, it is ready to be loaded with samples.
In principle, the freezer unit should be set at about 3℃ above the desired temperature. For
example, if the storage temperature is -60℃ ,set the unit at -57℃ . Load the unit with samples
in batches of less than 1/3 of the unit's capacity .Make sure that the unit is capable of cycling for
more than 8 hours.
⑥ If the unit has a backup cooling system (optional), turn it on.
Optional
REMOTE ALARM
MAX DC30V 2A
Battery Switch
POWER
SWITCH
on
on
off
off
9
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