EYELA NTT-2100 Instruction Manual page 33

Trouble
No function on a stirring
pump.
Reduced amount of
circulation
Output of sensor alarm as
[SnS].
Output of uncontrollable
temperature alarm as
[cont]
Output of power failure
alarm [PoFF]
Output of level alarm [LEvL]
Output of upper limit
temperature alarm as
[AL-H]
Output of lower limit
temperature alarm as
[AL-L]
Control operation stop with
no alarm output.
<<Uncertain display mode
on a PC screen>>
Caus
e
Contaminated or clogged
casing.
No rotation in the pump's
motor.
Closed valve for external
circulation.
Bent / deformed hose.
Excessive / huge pressure
loss in the circulation.
Disconnection of temperature
sensor.
It is detected when the temperature keeps
rising for 10 minutes or longer even though
the measured temperature is higher than the
set temperature.
Or the temperature does not rise for 10
minutes or longer even though the measured
temperature is lower than the set temperature.
Sensing power failure while
controlling, or turning off the main
power without finishing the control
mode.
Extremely low level of in-bath
liquid.
Sensing at momentarily
exceeding preset temp. +
upper limit temp. alarm preset
value
Sensing at momentarily
exceeding preset temp. -
lower limit temp. alarm preset
value.
Malfunction on temperature
controller caused by some
noise.
Ambient temperature over
35°C.
Remed
y
Refer to [7. Maintenance and
checkup for cleaning.
Stop operation immediately,and
contact your local dealer or
closest customer service center.
Open the valve.
Straighten / fix the form of it.
Shorten the circulation line.
Stop operation immediately,and
contact your local dealer or
closest customer service center.
Stop operation
immediately,and contact your
local dealer or closest
customer service center.
Stop the control operation
first, and turn off the main
power.
Refill the liquid.
Review the alarm value.
* The pre-shipment value is
5°C.
Refer to [5-4-2. How to set
upper limit temp. alarm].
Review the alarm value.
* The pre-shipment value is 5°C.
Refer to [5-4-3. How to set
lower limit temp. alarm].
Try any other power outlet.
Set the ambient temperature
to 35°C or lower.
In addition, even by doing so
but still alarming, please
stop the operation
immediately and contact our
sales office or service center
near you.