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SHARP AL-1644 H2 Error Code - Our usual maintenance Engineer has replaced the Fuser unit, but the H2 code is still flashing - Is anyone able to suggest the next step please? Thanks Adrian
To enter the serviceman simulation mode, press the keys as follows: Clear → Density select → Clear→ Density select To cancel the simulation mode, press the clear key. Then enter code 14 then hit start.
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H2 deals with the fixing unit.... You need to fix the problem before it can be rest. It may just be the fuser lamp is blown. You have to take it out and if it looks like a candy cane that is the problem. Good Luck
The H4 code indicates the fuser may have blown the thermistor. It also could be a false error code. Try this series to clear the error and if it returns, then you'll know for sure the fuser is the culprit.
To reset press the following buttons:
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.
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. 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.
The error code happens because the fusing temperature isn't getting to the right setting in time. No reset code is available for the fuser unit. It could be the thermistor that has gone bad with it but usually on this machine it's better to get the whole fuser assembly replaced.
Usually CH indicates that one of the doors on the copier is not closed properly, if it is a flashing CH then there is no toner cartridge in the copier or the cartridge is of the wrong type for this machine. A lot of toners for this machine look alike but are not the same for the machine.
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