27
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 the 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 the 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 equipment is not installed in the appropriate place described in
this instruction manual
□ The ventilation around the unit is blocked.
□ There is a nearby heat source.
□ The ambient temperature is too high.
□ 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.
□ A foreign substance is located between door gaskets.
