53
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 compressor does not
operate at all when turning
ON the power switch.
(LCD touch panel is turned
ON)
□ The capacity of power supply is not sufficient. When the capacity of
power supply is not sufficient to start the compressor, compressor may
not start.
The alarm is activated
during operation
□ 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.
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 set value of the chamber temperature is lower than -86
o
C. The
temperature settable range is between -90
o
C~-50
o
C. However, the
temperature control range is between -86
o
C~-50
o
C.
□ The unit is in direct sunlight.
□ 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.
The outside of the unit is
wet with dew.
In case of sultriness or bad location, the exterior of the unit may be wet
with dew. Under a high humidity environment, the cold exterior of the
unit condenses the moisture in the air, so that it is not malfunction. Wipe
the dew with a dry cloth.
Noisy in motor sound or
flowing liquid.
On the characteristics of the cooling circuit, the sound of motor or
flowing refrigerant may be heard during operation. Especially a few
hours after starting operation, the sound of compressor or flowing
refrigerant may be loud, however it is a normal operation.
Note:
• Keep an electric product which emits an electromagnetic wave away from this unit. A noise from an
electromagnetic wave may cause malfunction to this unit.
