6
-49-
T
roubleshooting
Stop running the product immediately and
call your local agency or closest customer
service center.
Turn off the residual current device and
power switch, then connect the plug to the
outlet.
Turn the device on.
Stop running the product immediately and
call your local agency or closest customer
service center.
Reduce the load.
Set the room temperature at 35℃ or
lower.
Over load start-up happened because of
sudden running of refrigeration unit right
after operating the under cooling protector.
Turn the power off and reboot the unit after
approx. 5 minutes.
Check the setting temperature.
Stop running the product immediately and
call your local agency or closest customer
service center.
I
f the ambient temperature is too high, set
the value at30℃（LTI-400E) or lower than 35℃.
Reduce the number of sample and vessel.
Check the condition of frost formation and
execute manual forced Defrosting.
Set the unit in an appropriate installation
site (refer to P. 18).
Reduce the number of sample and vessel.
Set the temperature higher than 5℃
when the ambient temperature is too low.
Trouble
Cause of the trouble
Countermeasures
Residual current device
can not be turned on.
Electric leakage occurs.
Excess current flows.
No display is shown
on the indicator when
turning on power switch.
Power plug is disconnected or not connected
to the outlet completely.
Power is not supplied.
Turn on the breaker of distribution board.
Residual current device is not turned on.
Residual current device is impaired.
Power switch is impaired.
Temperature controller is impaired.
Refrigeration unit does
not work properly.
Refrigeration unit is impaired.
Over load relay protection circuit of
refrigeration unit works（refer to P.15 and
17）
（Over load alarm for refrigeration unit
occurs.）
Unit can not be cooled
down.
Setting temperature is not appropriate.
Refrigeration unit does not work.
Gas is leaking.
Under cooling protector works.
（Under cooling alarm is activated.）
（For details about under cooling protector, refer
to page P.2７）
For the settings for under cooling protector,
set the temperature -10℃ lower than setting
temperature of temperature controller. In case the
setting temperature is too high, set the value up to
40℃.
Unit can is poorly cooled
down
Gas is leaking.
Ambient temperature is 30℃（LTI-400E) or
higher than 35℃.
Too many samples and vessels in the
chamber prevents convection flow of heat.
Refrigeration unit is frosted.
There's some obstacles on the side of
condenser (heat exchanger) and prevents exhaust
heat.
Temperature does not
rise up to the setting
value.
Too many samples and vessels in the
chamber prevents the convection flow of the heat.
Over heat protector works.
（Over heat alarm occurs.）
For the settings for under cooling protector,
set the temperature 10℃ higher than setting
temperature of temperature controller. In case the
setting temperature is too low, set the value higher
than 30℃.
Ambient temperature is lower than 5℃.
