28
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.
→ A breaker of 15 A or more is recommended.
□ The fuse on the supply circuit is blown.
The alarm is activated at
start-up
The alarm mode continues until the chamber temperature reaches
the set temperature.
The alarm buzzer recovers after 30 minutes even if the alarm buzzer
is stopped by pressing the alarm buzzer stop key (BUZZER).
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.
→ A breaker of 15 A or more is recommended.
□ The fuse on the supply circuit is blown.
□ The outer door has been kept open for a long time.
□ The outer door is open.
□ An error code is displayed on the temperature display. [page 24]
→ Contact our sales representative or agent.
There is excessive noise
during operation
□ The floor is not sturdy.
□ The installation site is not level.
□ The blood bank refrigerator is tilted.
□ The cabinet is touching the surrounding wall.
The chamber does not
get cold enough
□ The outer door is frequently opened.
□ The inner door is open.
□ 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.
→ The allowable ambient temperature is between 5
o
C and 35
o
C.
□ There are too many items stored inside the chamber.
□ The air exhaust vent is blocked by stored items.
□ The access port is not covered.
→ The access port should be covered with insulation and rubber caps
when not in use.
□ The door gasket is damaged.
→ If it is damaged, contact our sales representative or agent for
replacement.
□ A foreign substance is located between door gaskets.
The displayed temperature
is not 4
o
C
A displayed temperature between 3
o
C and 5
o
C (depending on the
ambient temperature) is not a malfunction.
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