Stop running the product immediately and
call your local agency or closest customer
service center.
Reduce the number of sample or vessel.
Reduce the number of sample or vessel.
Check the condition through the observation
window and execute manual forced Defrosting
regularly.
Refer to the related trouble of refrigeration
unit in the previous page.
Set the higher setting value for the upper
temperature limit alarm depending on the
situation.
Reduce the number of sample or vessel.
Stop running the product immediately and
call your local agency or closest customer
service center.
Set the higher setting value for the upper
temperature limit alarm depending on the
situation.
Close the door completely.
Stop running the product immediately and
call your local agency or closest customer
service center.
Check whether the door is opened or not.
If the door is closed, press [Set] key to cancel
the alarm and restart the operation.If the alarm
should activate again, stop running the product
immediately and call your local agency or closest
customer service center.
-50-
Trouble
Cause of the trouble
Countermeasures
There's a difference between
displayed temperature and
actual temperature.
Heater is disconnected.
Refrigeration unit is impaired.
It happened because of the different
accuracy of temperature controller and
sensor.
Set the setting for calibrating displayed
temperature （refer to P.41）.
Too many samples and vessels in the
chamber prevents the convection flow of the heat.
Temperature can not be measured precisely
because of too many samples or vessels around
the temperature sensor
Dew condensation is built up
on the wall of the chamber
Temperature does not
rise up to the setting value.
Unit can not be
temperature controlled.
SSR is impaired.
Temperature controller is impaired.
It may happen depending on the setting, ambient
temperature or humidity in the chamber
Wipe the dew off with soft cloth.
Upper temperature
limit alarm is activated.
Too many samples and vessels in the
chamber prevents the convection flow of the heat.
Refrigeration unit is frosted.
Refrigeration unit is poorly cooled.
The alarm is activated because the temperature
rises up to setting tempsetting value for
the alarm temporally, or the setting value for the
alarm is too low.
Lower temperature
limit alarm is activated.
Too many samples and vessels in the
chamber prevents the convection flow of the heat.
Heater is disconnected.
Refrigeration unit can not be stopped.
The alarm is activated because the temperature
rises up to setting temperature-setting value for
the alarm temporally, or the setting value for the
alarm is too low.
Door alarm is activated.
Door is not closed completely.
Door switch is impaired.
Temperature control
failure alarm is activated.
・Though displayed temperature rises up to setting
value, the temperature keeps on rising higher for
longer than 10 minutes.
・Though displayed temperature rises up to setting
value, the temperature does not rise higher for
longer than 10 minutes.
Though the displayed temperature is higher
than setting value, the temperature does not
rise for longer than 10 min.
It may happen because of the operation of
over heat protector or heating thermostat.
Check the setting for over heat protector.If
the setting is appropriate,
stop running the
product immediately and call your local agency
or closest customer service center.
。
