Samsung RF18A Series Service Manual page 68

CHECK THE INSTALLATION STATUS
2) Self-diagnostic function during normal operation
In that case, you may take your fingers off both buttons and press the '>' button to enter the Engineer Mode.
After entering Engineer Mode, press the '<' or '>' key to make the number '3' blinks.
2-1) If '<' + '>' are pressed simultaneously for 6 seconds during normal operation, the temperature setting display will
operate for 4 seconds (ON/OFF 0.5sec each).
In that case, you may take your fingers off both buttons and press the '>' button to enter the Engineer Mode. After
entering Engineer Mode, press the '<' or '>' key to make the number '3' blinks. Then, press the 'O' button to enter the self-
diagnosis function..
2-2) At this moment, self-diagnostic function will be returned with buzzer sound 'ding-dong'.
If there is an error, display of error will be operated for 30 seconds and then return to normal condition whether
problem is corrected or not.
(Refer to self-diagnosis CHECK LIST)
2-3) Input by button is not accepted during self-diagnostic function.
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①
②
② '<'+ '>' Key are pressed simultaneously for 6 seconds.
And the Control Display will blink with 0.5 second interval for 4 seconds.
Then, press the 'O' button to enter the self-diagnosis function.
Enter the
Engineer Mode
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