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TROUBLESHOOTING
If the unit malfunctions, check out the following before calling for service.
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 door is not installed correctly.
□ The set temperature in the controller is not set properly.
□ The grille is blocked out.
□ The ultra-low temperature 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 ultra-low temperature
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.
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.
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