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25
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Trouble
Cause of trouble
Countermeasure
Hose is crushed.
Stretch the hose.
Set the selector switch to the sensor to be
used.
Confirm that the sensor connector is
correctly connected.
Turn OFF the unit power switch, then turn it
ON again to cancel alarm.
Stop operation and contact your local
dealer or closest customer service center.
Circulation volume is small.
・
Temperature setting
cannot be made.
・
Abnormal indication
・
Temperature controller is in abnormal
status because of noise and etc.
・
Ambient temperature exceeds 35
℃
.
Change the power supply and operate the
unit.
If alarm continues, stop operation and
contact your local dealer or closest
customer service center.
Air included
If the cooling liquid is high-viscosity
antifreeze, water it down or change the
liquid to the one that has low viscosity.
Cool water does not circulate.
Thermal protector of circulation pump
works.
Dirt adheres to the strainer of
low temperature circulation bath.
Remove the dirt.
Bath internals is frozen at
＋
5
℃
or higher.
Poor circulation and bath is not stirred
sufficiently because of pressure loss of
piping and etc.
・
Open the valve for adjusting discharge
volume
・
Use antifreeze.
Sensor connector not connected or
connector dislodged
Remove the drain plug and confirm that
cooling water flow out through the drain
port. Then, attach the drain plug and turn
ON/OFF the pump switch two to three
times to purge air.
Valve for adjusting discharge volume
is closed.
Open the valve for adjusting discharge
volume.
External
temperature
sensor (option)
used
Alarm for refrigeration unit is
activated.
・
ALARM LED illuminates
・
”A14” blinks.
High-pressure switch for refrigeration unit or
over load relay holding circuit for
refrigeration unit works.
・
Set the ambient temperature at 35
℃
or
lower.
・
If the heat load is out of cooling capability,
reduce the load.
・
Check the fan for refrigeration unit.
・
Check the power and voltage.
Alarm for sensor is activated.
・
Alarm LED illuminates
・
”F01” illuminates
The temperature sensor is either
disconnected or short-circuited.
Selector switch of external sensor
not set correctly:
・
IN : Internal sensor control
・
OUT: External temperature sensor
control
Upper temperature limit
alarm happens.
・
Alarm LED illuminates
・
”
A0H
” and measured temp.
displayed alternately.
Measured temperature exceeds
the upper limit.
After confirming that the bath
temperature falls below the measurable
range, press the [Set] key to clear the
alarm.
Lower temperature limit
alarm happens.
・
Alarm LED illuminates
・
”
A0L
” and measured temp.
displayed alternately.
Measured temperature exceeds
the lower limit.
When temperature rises above the
measurable range, press the [Set] key to
clear the alarm.
Power failure recovery alarm
issued
・
Alarm LED ON
・
“A-4” and measured temp.
displayed alternately.
The power was off during the
temperature control under setting the
power recovery function, [on] or [oFF]
and power switch was on.
[Press the [Set] key. Alarm can be
canceled.
Refer to the manual, P.21 and set up
necessary functions.
