I have a sharp copier AR-5127 that stopped working recently. It shows H4-00. How do I clear this indication?

SOURCE: Sharp AR-5127, the error code U2-40

U2-40 is a board error, F1-15 is finisher lift motor error.

To reset: #, interrupt, clear, interrupt. (screen should say service mode), enter 16, print, are you sure? , yes.

For the finisher error, follow above procudure, entering 14 instead of 16. if error returns, disconnect the finisher

SOURCE: Sharp AR-5127 H2-00 code reset

Sharp Fuser
H2-0 Fusing unit temperature error
H4-0 The fusing unit doesn't heat up.
***ALWAYS DISCONNECT POWER WHEN WORKING ON MACHINE***
You have to reset fuser errors with simulation 14. Push P * C * then 14 then Start (the button you use to make copies) and it should reset the code. If not then replace the fuser.
SM 5-1 should turn the lamp on. If lamp blinks on and off it is the thermistor, if it does not it is the lamp, but check the contacts on the lamp/fuser -- they have been known to erode.
Also check thermal fuse, if defective replace.

SOURCE: Manual for Sharp AR-BC 320 All in one copier

also if the machine is networked you can type the ip address in your internet browser and access the manuals on your machines hard drive.

SOURCE: Sharp AR-M160 H4 error code

Clearing a trouble code on a AR-M160 is a little different than the AR160.

Try "#" "interrupt" "clear" "interupt" "1" "4" "start key"

This should clear the error. Even if you replace the fusion unit you will need this code to clear the error

SOURCE: What does the code L1-00 on a Sharp ARBC260 copier

L1-00 means that the scanner unit under the glass was interupted in it travle and didnt return to home position within a specified time. Often you can restart the power to clear this.