Stop controlling before turning the power
switch off. Press [Set] key to cancel the
alarm.
Stop running the product immediately and
call your local agency or closest customer
service center.
-51-
Trouble
Cause of the trouble
Countermeasures
Over load alarm for
refrigeration unit is
activated
Power failure occurred while the unit is
controlled.
Power switch is turned off without stopping
control.
Refrigeration unit or ancillary part is
impaired.
Control gets stopped
without activating alarm.
Display on the indicator is
uncertain.
Power failure alarm is
activated.
Temperature sensor is disconnected.
Temperature controller is not in normal
condition because of noise and etc.
Change the power source. If the alarm
should still activate, stop running the
product immediately and call your local
agency or closest customer service center.
Over heat alarm is
activated.
Setting value for over heat protector is
too low.
Refrigeration unit does
not start up smoothly.
Sensor alarm activated.
Heat load is too heavy.
Ambient temperature is higher than 35℃.
Reduce the load.
Set the room temperature 35℃ or lower.
Stop running the product immediately and
call your local agency or closest customer
service center.
For the settings for over heat protector,
set the tempe10℃ higher than setting
temperature of temperature controller. In case
the setting temperature is too high, set the value
up to 30℃.
Temperature controller or SSR or fan in the air jacket
may be impaired, which makes the temperature higher
than setting value.
Stop running the product immediately and
call your local agency or closest customer
service center.
Under cooling alarm is
activated.
Setting value for under cooling protector is
too high （For details about the setting of
under cooling protector,refer to P.2７).
Temperature controller or SSR or fan in the air jacket
may be impaired, which makes the temperature lower
than setting value.
Stop running the product immediately and
call your local agency or closest customer
service center.
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℃
Protection timer for refrigeration
unit works.
To protect the unit from over load start-
up, the timer starts working
automatically after passing the time as
below after stopping refrigeration unit.
・LTI-400E 210 sec.
・LTI-700E 80 sec.
・LTI-1200E 80 sec.
Temperature can not
be stable.
Room temperature changes
constantly because of the influence
of air conditioner and etc.
Use the unit in a place where the wind of the
air conditioner does not blow directly onto
the unit.
Since the unit is equipped with air jacket
system natural convection flow, it takes a
while before the temperature reaches at the
setting value and maintains the same
temperature. See how it works for about 2
hours.
