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4.6. Interface Board (LCD Display)
The Interface board has the function of interacting with the user, indicating the product functions/programming
and operation (see use characteristics item) always put in operation by the electronic control.
5. TESTS
Two automatic test routines are available in these refrigerators in order to prove the main components of the
product: one executed automatically by the software of the electronic control, when the product is plugged on
the power supply and other handled by the own technician, which are described as follows:
5.1. Initial Test Routine (factory routine)
This refrigerator has an Automatic Testx Routine (works automatically, without manual operation) that is always
executed when the product is energized to the power supply, in order to verify the functioning of the main
components of the product. This routine operates as follow:
# Turn off the product from the wall socket, wait 10 seconds and turn it on again.
Note: At this moment, an inner temperature check will occur in the evaporator, through the Defrost Sensor, and
then the Routine will start automatically.
-
The Defrost Heater is energized for 6 seconds
-
Freezer Fan Motor is energized for 6 seconds
-
Refrigerator Fan Motor is energized for 6 seconds
After 18 seconds, from the result (temperature) gained from the Defrost Sensor, the Electronic Control will
manage the activation of the compressor and fan motors, as follow:
# If the Defrost Sensor is warm (temperature > 0o C)
-
Compressor and fans will be energized / turned on.
# If the Defrost Sensor is cold (temperature < 0o C)
-
Compressor and fans will not be energized / (will keep off).
After 328 seconds (5.5 minutes) the product is energized, an automatic check will occur for all the Sensors
(Refrigerator, Freezer & Defrost)
# If any of the sensors present failure (open or in short circuit);
-
The Automatic Routine will be aborted (348 seconds/ 5.8 minutes); then, after 2 minutes (468
seconds/ 7.8 minutes) the Alarm Code will be shown on the display and the operation proceedings will
follow as described in item – Alarm System.
# In case of no failure is detected
-
Product will abort the Automatic Routine (348 seconds/ 5.8 minutes) and starts working in normal
activity, switching on the components due to the necessity (display temperature).
