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Section 9 - Trouble Shooting
Problem Cause Solution
Temperature sensor
failure alarm.
Equipment has
stopped and
is displayed and
LED is on.
Temperature sensor is disconnected or
broken.
Stop operation and contact a local service
representative.
Refrigeration unit
overload relay alarm.
Equipment has
stopped and
is displayed and
LED is on.
Ambient temperature has exceeded 35ºC.
Set the ambient temperature at 35ºC or
lower*.
The thermal load has exceeded the cooling
capacity.
Keep the thermal load within the specication range*.
Air lter is dusty Clean the air lter*.
Refrigerator fan is not operating. Check the refrigerator fan*.
Low supply voltage Check the power and voltage*.
Refrigerator start up failure Start refrigerator in 10 minutes*.
*Press set to cancel alarm. The overload relay will be ready to use in approx 10 minutes.
Temperature upper
limit alarm.
Equipment has
stopped and
is displayed and
LED is on.
The temperature around the sensor exceeds
the lower limit.
Press Set to cancel alarm. If necessary adjust
temperature upper limit alarm to suit.
Temperature lower
limit alarm.
Equipment has
stopped and
is displayed and
LED is on.
The temperature around the sensor exceeds
the lower limit.
Press Set to cancel alarm. If necessary adjust
temperature lower limit alarm to suit.
Power outage recovery
alarm.
Equipment is still
operating. is
displayed and
LED is on.
Power has been interrupted and then
restored during operation.
Press Set to cancel alarm.
Power outage recovery
alarm.
Equipment has
stopped and
is displayed and
LED is on.
Power has been interrupted and then
restored during operation.
Press Set to cancel alarm. Equipment will
need to be re-started.
Equipment has
stopped, no alarm is
present and there is
nothing on the display
Self-diagnosis has detected a power supply
problem.
Change the power supply and start
equipment again. If problem persists,
Stop operation and contact a local service
representative.