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Troubleshooting
Should there be any malfunctions in the system, please attempt to answer the
following questions before notifying maintenance or calling a Haier Equipment &
Instrument Service Center. Please do not dismantle the freezer yourself.
Malfunction phenomenon
Is the power supply normal? Has the main power switch been
turned on yet?
Freezer does not start up
Is the voltage supply too low?
Is there any voltage input from the outside?
Is the ambient temperature too high?
Are the inner doors and outer doors closed properly? (Has any
ice or frost damaged the seals between the door and the frame?)
Is the condenser fi lter clogged?
Is the temperature setting correct?
Poor refrigeration eff ect
Is the freezer being kept away from direct exposure to sunlight?
Is the freezer near any heat source?
Is the porthole plug installed in the porthole with proper insulation
materials?
Has the freezer been loaded with too many non-frozen samples
within the last few hours?
Is the unit set on a fi rm and level fl oor?
The unit is noisy
Is the exterior of the unit touching any objects?
Is the freezer unit leveled with the leveling legs?
Malfunction checks and resolutions
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Usage Precautions
• 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.
• 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 of the unit
capacity so that the temperature does not rise while samples are being loaded.
• 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.
• 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 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.
• 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.
• 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.
Meaning of crossed –out wheeled dustbin:
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 landfi lls or dumps, hazardous substances can leak into the groundwater
and get into the food chain, damaging your health and well-being.
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