Samsung WF220ANW/XAA Training Manual page 47

4. Test Mode & Error Check
4-1-10. Diagnostic Code Check Mode
Board Input Test Mode:
1. Activate the Service Mode first.
2. Press the "Spin key" key to start Diagnostic Code Check Mode with Code "d" flashing.
3. To cycle through the diagnostic codes (d1,d2,d3~d9), turn the Rotary Cycle Selector in one direction
(either Clockwise or Counterclockwise).
4. Now, when turning the Rotary Selector Key in the same direction, it shows diagnostic codes from the
latest (d1).
5. When turning it in the opposite direction, it shows the diagnostic codes in the reverse order. Ex)
When it stops at d5 and turns backward, it shows from d4 down to "d". Refer to Diagnostic Code.