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Error 4F unable to print is message related to the print head, and specifically means that your print head has either an electrical fault or that it has a temperature error.
You need to do the following. Enter maintenance mode by pressing Menu * 2864 in less than 2 seconds. Press Stop and retry if you dont see the lights blinking. Then press, 80, 2864, 4460, 99. It should work, otherwise its a fault service station pump
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