10
• If the inside temperature arises because of the failure of the freezer, which cannot be solved
within short time, please remove the sample to avoid the potential damage.
• Before putting samples in the freezer to be stored, fi rst check that the freezer's temperature for
the samples conforms with the temperature that is required for the samples, in order to prevent
the samples to be stored from getting damaged or lost due to the freezer not attaining the
temperature required.
• Because it takes time for the refrigeration temperature to reach the stored samples, there
is normally a temperature discrepancy between the actual shown temperature and the set
point. This is a normal phenomenon. The lower the set point is, the smaller this temperature
discrepancy becomes.
•All ultra low temperature storage units are low temperature storage equipment. It is prohibited
to load an excessive amount of samples into the unit at one time. The compressors run
for a long period of time without stopping. The freezer temperature may not decrease, and
the compressors can become overheated. Samples must be loaded in batches, and while
incrementally decreasing the temperature setting. The process should be repeated until the fi nal
temperature is reached.
• Do not use any unauthorized mechanical tools or other means to accelerate the defrosting
process.
• Do not damage the refrigeration circuit.
• Do not use any non manufacturer-approved electrical components in the freezer.
The Haier ULT freezer control setting is stored in its memory system. Should there be a power outage
and recovery, the unit can resume its operation based on the previous settings.
• In the event of a power outage and recovery, be sure to wait for at least 5 minutes
before turning the unit on again to avoid damaging the compressors and refrigeration
system.
• If the unit is not in use for a long period of time, make sure the power cord is
unplugged. Deteriorated insulation of the power cord may lead to electric shock or fi re.
• If the freezer is not in use in an area without any supervision, please make sure
children will not approach the freezer and the doors should not be closed.
Operation after a Power Outage
Caution
23
• To prevent electric shock or injury to operators, the AC power supply to the freezer
must be disconnected completely before any repair and maintenance work is to be
performed.
• During any repair maintenance work, do not inhale medical particles or aerosols near
the equipment as they might be harmful to your health.
Cleaning maintenance
Warning
Cleaning the freezer
• Clean the unit once a month.This can help the exterior look new.
• Use a dry cloth to wipe away loose dust inside and outside of the freezer. If the unit is rather dirty,
use a clean doth soaked with a neutral detergent to clean the unit. Then use a dry cloth to wipe away
any residual detergent solution.
• Never pour water onto or into the unit. Doing so can damage the electric insulation and cause
failure.
• Compressors and other mechanical parts are hermetically sealed. They do not need lubrication.
• The users can easily remove the frost or ice on the chamber and clean the condensaor fi lter as
often as necessary.
Cleaning the freezer
Clean the condensor fi lter when the control panel shows an signal for "Hot Condensor" and the alarm
fl ashes. Even if the light is not on, the condensor fi lter should be checked regularly according to the
suggestion from the distributor.
To clean the fi lter, follow the procedure below.
1. Pull off the front grill cover.
2. Pull out the fi lter screen.
3. Use water to wash the fi lter screen.
4. After the fi lter screen is dry, reinstall it back
in its original position and close the cover.
5. If the “Hot Condenser” light is on before
cleaning, check the light to make sure that it shuts
off after cleaning. If it does not shut off , please
contact after-sales service personnel.
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