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TROUBLESHOOTING
If the unit malfunctions, check out the following before calling for service.
<Attention>
If the malfunction is not resolved after checking the following items or if the malfunction is not shown in
the table below, contact our sales representative or agent.
Malfunction Check/Remedy
Nothing operates even
when the power supply
plug is plugged in
□ The unit is not connected to the power supply properly.
□ The capacity and voltage of power supply is not sufficient.
□ There is a power failure.
□ The circuit breaker on the supply circuit is activated.
□ The fuse on the supply circuit is blown.
The alarm is activated
during operation
□ The unit is not connected to the power supply properly.
□ The capacity and voltage of power supply is not sufficient.
□ There is a power failure.
□ The circuit breaker on the supply circuit is activated.
□ The fuse on the supply circuit is blown.
□ The chamber temperature setting has been changed.
□ The door has been kept open for a long time.
□ Containers with a high temperature (load) have been put in the
chamber.
□ The door is open.
No key operation is
available
□ The key lock is set in ON (L 1).
→ Set the key lock in OFF (L 0).
During setting mode, the
mode returns to
temperature display mode
The unit will return from setting mode to temperature display mode
automatically after 90 seconds if no key is operated (auto-return
function).
Excessive noise □ The floor is not stable.
□ The installation site is not level.
□ The freezer is tilted.
□ The cabinet is touching the surrounding wall.
The chamber does not
get cold enough
□ Warm material has been put in the chamber.
□ The door is frequently opened.
□ The chamber temperature setting is too high.
□ The unit is in direct sunlight.
□ The unit is not installed in suitable location as specified in these
operating instructions.
□ The ventilation around the unit is blocked.
□ There is a nearby heat source.
□ The ambient temperature is too high.
→ The allowable ambient temperature is between 5
o
C and 30
o
C.
□ There are too many items stored inside the chamber.
□ The access port is not covered.
→ The access port should be covered with insulation and rubber caps
when not in use.
□ The door seal is damaged.
→ If it is damaged, contact our sales representative or agent for
replacement.
□ Any foreign substance is located between door gaskets.
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