32
TROUBLESHOOTING
If the unit malfunctions, check out the following before calling for service.
<Attention>
If the malfunction is not eliminated after checking the following items or the malfunction is not shown in
the table below, contact our sales representative or agent.
Malfunction Check/Remedy
If nothing operates even
when 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.
→ 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 status is kept until the chamber temperature reaches the
set temperature.
The alarm buzzer recovers after 30 minutes even if the alarm buzzer
is silenced 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 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 was kept opened for a long time.
□ The outer door is opened.
□ An error code is displayed on the temperature display. [page 26]
→ Contact our sales representative or agent.
Noisy □ The floor is not sturdy.
□ The installation site is not level.
□ The blood bank refrigerator is tilted.
□ The cabinet contacts the surrounding wall.
When 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.
□ The storage items are too much.
□ The air exhaust vent is blocked up with storage items.
□ The access port is not covered.
→ The access port should be covered with the insulation and rubber
caps when no use.
□ The door gasket is damaged.
→ If it is damaged, contact our sales representative or agent for
replacement.
□ Any foreign substance is located between door gaskets.
The displayed temperature
is not 4
o
C
The displayed temperature between 3
o
C and 5
o
C (depending on the
ambient temperature) is not a malfunction
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