Sharp Z-830 light blinking H 4

1. Find the pink Clear button on the Control Panel of the WorkCentre.
2. Find the button below the word Auto.
3. Press these buttons in the following sequence: [Clear], [Auto], [Clear], [Auto] NOTE: All of the lights on the Control Panel should go out and the LED Display should go blank. If the lights do not go out, then repeat step 3 until they do. It may be necessary to increase or decrease the pace of the [Clear], [Auto], [Clear], [Auto] sequence.
   
4. Press the [10's] key one time and the [1's] key four times to enter '14' in the LED Display, as if you were to make 14 copies.
5. Press the green [Start] button.
6. Press the pink [Clear] button two times.
7. The WorkCentre should now warm up and come to ready.
8. If the above steps do not clear the error code, repeat steps 3 to 6 a second time.

H4 can occur when the copier is turned on in area thats below 65 degrees. If the copier does not warm up to the preset temperature fast enough, then a H4 code appears and disables the copier until its reset using code 14 while in the diagnostics mode. The older Sharp copiers used this sequence of pushing these following keys. "C, "0", "0," "C" to get into diagnostics. When done correctly the machine will flash a "1" in the display window, and by typing in 14 and then pushing the green print key it will reset the code and the machine will immediatley begin running and retry warming up again. Also Sharp used "C', "interupt, "0", interupt. It always took 4 keys to get into the diagnostic mode, with 14 restting the codes. .

H4 indicates fuser not reaching temp, heater lamp, thermal fuse or thermister stuffed all parts of the fuser, you will need to have fuser replaces, not a operator repair job call a tec