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Troubleshooting
6
Trouble
Cause
Measure
Residual current device
can not be turned on.
Electric leakage occurs.
Excess current occurs.
Mains connector is unplugged.
Or it is not plugged surely.
The electric power is not supplied.
Residual current device is not turned on.
Residual current device is impaired
The power switch is impaired.
The temperature control circuit board has
some trouble.
The refrigeration unit
does not work.
Stop using the product immediately
and call your local dealer or closest
customer service center.
Turn off the power switch and the
residual current device, and plug the
mains connector completely to AC
outlet port.
Turn on the switch board.
Turn on the mains switch.
Stop using the product immediately
and call your local dealer or closest
customer service center.
The chamber is not
cooled down.
The cooling power is
not sufficient.
The refrigeration unit breaks down.
Stop using the product immediately
and call your local dealer or closest
customer service center.
The overload relay holding circuit for
refrigeration unit works. (Refer to P.15,
16.)
See the clause [OLR] (Overload of
refrigeration unit) alarm.
The high pressure switch for refrigeration
unit works. (Refer to P.15, 16.)
See the clause [HP] (High pressure)
alarm.
Reduce the load of refrigeration unit.
Keep the ambient temperature lower
than 35
℃
.
Connect the unit to a proper voltage
AC outlet port.
Reduce the load of refrigeration unit.
Keep the ambient temperature lower
than 35
℃
.
Keep the ambient temperature lower
than 35
℃
.
Check the setting temperature.
The setting temperature is not suitable.
The refrigeration unit does not work.
The refrigeration gas leaks.
The refrigeration fan breaks down.
The chamber circulation fan breaks down.
The refrigeration gas leaks.
The ambient temperature exceeds 35
℃
.
Due to cramped conditions of samples,
the air circulation in the chamber is not
sufficient
Refrigerator has frost formation.
The filter is clogged with dust.
The ventilation port is blocked with
some obstructions.
Reduce the quantity of samples and
vessels.
Monitor the attached frost, and run the
manual (forced) defrost operation on
some regular basis.
Clean the filter.
Keep off obstructions in front of the
ventilation port.
Due to cramped conditions of sample
.
the air circulation in the chamber is not
sufficient
Reduce the quantity of samples and
vessels.
Stop using the product immediately
and call your local dealer or closest customer
service center.
The chamber circulation fan breaks down.
No display is shown on
indicator after turning on
power switch.
Temperature inside
the chamber is not
stable
