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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
If nothing operates even
when switched on
□ The unit is not connected to the power supply.
□ There is a power failure.
□ The fuse is blown or the circuit breaker is activated.
An alarm system works
Check the following when a buzzer sounds or when the alarm lamp
lights.
● When use starts.
□ Is the chamber temperature is equal to the set value?
● During operation
□ A little before, has the value of the chamber temperature been
changed significantly?
□ Had the outer door been left open for a long time?
□ Did not you put some warm sample into the chamber?
In the above cases, the alarm is canceled with no operation.
“---” flashes in the display
of current value
□ After turning off (“O”) the battery switch and power switch, turn on (“I”)
power switch, battery switch in this order.
The cooling is poor
□ The environmental temperature is too high.
□ The latch of inner door is not closed completely. The outer door
is not closed firmly. (The frost or ice between the cabinet and door
gasket possibly prevents door seal.)
□ The air intake vent is blocked.
□ The door is not shut tightly.
□ The inner lid is not installed correctly.
□ The set temperature is not set properly.
□ The grille is blocked out.
□ The freezer is in the direct sunlight.
□ There is any heating source near the freezer.
□ A rubber cap and insulation for the access port are not set
correctly.
□ You put too many unfrozen articles into the freezer compartment.
The exterior 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.
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