54
TROUBLESHOOTING
If the unit malfunctions, check out the following before calling for service.
Malfunction Check/Remedy
The unit does not operate
at all when turning ON the
power switch.
￭
The unit is not connected to the power supply.
￭
During a power failure.
￭
The circuit breaker is activated.
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.
An alarm is activated.
￭
A little before, the value of the chamber temperature has been
changed significantly.
￭
The door had been left open for a long time.
￭
Some warm contents are put into the chamber.
*In the above cases, the alarm is canceled with no operation.
The cooling is poor.
￭
A large amount of warm contents are put into the chamber.
￭
A large amount of frost is built on the inside wall of the chamber.
￭
The door is often opened.
￭
The set value of the chamber temperature is lower than -86
o
C. The
temperature settable range is between -50
o
C
～
-90
o
C. However, the
temperature control range is between -50
o
C
～
-86
o
C.
￭
The ambient temperature is higher than 30
o
C. The allowable ambient
temperature is between 5
o
C
～
30
o
C.
￭
The unit is in the direct sunlight.
￭
There is no more than 10 cm clearance around the unit.
￭
The grille or the exhaust air bent is blocked by something.
￭
The unit is not installed horizontally.
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:
・
If the malfunction is not eliminated after checking the above items, or the malfunction is not shown in the
above table, contact our sales representative or agent.
・
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.
