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My Xerox Workcentre-5020 machine showing U4 error. How can I solve this problem ?

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@basanta711, Press 0 for 5 seconds then press green (start) then 50, green, 20 green, 0, green then on/Off the printer........... problem is solved

Posted on Nov 07, 2010

  • tbaly Sep 26, 2011

    Thanks jk8400m and thanks basanta711 for your question.

    I have contacted maintenance and they told me the same thing you posted, they called it the "50/20 reset".

    But they also said if the problem persists then the problem is hardware and there is a part that should be changed.

    The reason for such error (at least that was my case) is overwork, the WC5020 is a 5000 papers/month machine that is about 160 papers/day, I overworked it in a couple of hours by printing 50 papers, copying 150 papers and scanning 50 papers, so it overheated.

    Thanks ALLAH, I didn't burn something inside.

    Another possible reason for that (they said) is Electrical Current Fluctuations, if a fluctuation occurs that is more than 10% of your normal alternating current, the machine as a precautionary action will perform the U4 halt, and it is reset in the way you described.

    Note: Press the Green (Start) Button while you are still pressing the "0" button after the 5 seconds

  • manmohan Jan 28, 2013

    i can not solve this problem by this formula


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U4 Error Code Xerox WC5016/5020

Xerox WC5016 U4 Error Code
Follow the Simple Step
1.Switch Off the Machine and Switch On.
2.Press 0 for 4-8 Seconds and Press (Green) Start Button.
3.C_ _ will Appear Enter 50 and Press (Green) Start Button.
4.F_ _ will Appear Enter 20 and Press (Green) Start Button.
5.1-3 will appear on the Screen Enter 0 Press (Green) Start Button.
6. F_ _ will Appear Switch off machine
7. Switch On Machine Problem will get Solve .

Posted on Sep 13, 2017


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