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TROUBLE SHOOTING
If the unit malfunctions, check out the following before calling for service, after transferring all the contents
to another freezer
No refrigeration
￭ The voltage is too low. (In this case, call an electrician.)
￭ The breaker is free.
￭ The fuse is blown.
Sometimes the freezer is not cooled at all for about 5 minutes after starting-up.
Poor refrigeration
￭ The ambient temperature is too high.
￭ The door is not shut tightly.
￭ The inner lid is not installed correctly.
￭ The set temperature in the controller is not set properly.
￭ The grille is blocked out.
￭ The filter is clogged. Clean the filter when the filter check lamp lights.
￭ The freezer is in the direct sunlight.
￭ There is any heating source near the freezer.
￭ A rubber cap and insulation for the access port are not set correctly.
￭ You put too many unfrozen articles into the freezer compartment.
￭ Too much frost is accumulated in the chamber.
Noise
￭ The freezer is not installed on the sturdy floor.
￭ There is anything touching the frame.
￭ The freezer is not leveled with the leveling feet.
￭ It is the immediately after starting of refrigeration.
The freezer causes larger noise when the chamber temperature is high because of large load. The
noise gets smaller along with chamber temperature.
Alarm test key cannot actuate the alarm function
￭ The alarm test key does not function when the power switch of the freezer is OFF.
￭ When only the buzzer or only the alarm is actuated by the alarm test key, the unactuated part is out of
order, and must be replaced.
Recorder does not operate normally (AT type only)
￭ If the chart is not advanced, examine the dry cell. Replace the cell for recorder every 1 year.
￭ If the temperature is not recorded, examine the recording pen. The pen should be our specified one.
Back-up test switch does not operate normally (AT type only)
￭ The liquid CO
2
cylinder is empty.
￭ The valve of the liquid CO
2
cylinder is not opened.
￭ The ambient temperature is too high. In this case, move the liquid CO
2
cylinder to a cool location.
Inquire at liquid CO
2
suppliers about cylinder check, adjustment, installation, or move.