Service Mode Tests
(t12) Restore EEPROM Values:
If the start button is pressed the default EEPROM values will be
restored except; Heater Type Mode and User Interface Type Mode
which will remain unchanged.
If restored properly then "EP" will be displayed on the seven-segment
display. (PASS)
If there was an error then "EF" will be displayed. (FAIL)
Until default EEPROM values are restored any user input including
control knob change and Power key will be locked out.
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