1. Replace the printhead. 2. Visual check Remove foreign substances from the head management sensor if any. 3. Replace the haed management sensor. 4. Cable continuity check If continuity of the cable between the head management sensor and the main controller PCB is abnormal, replace the cable. 5. Replace the main controller PCB.
Hi Andy, the following is more of an hack than fix but I've used it in the past in order to "get the job done" and I don't know if it causes any more problems in the long run so use it at your own risk
If you load the plotter in service mode it shouldn't show you that error because it bypasses some of the checks.
Once it's loaded in service mode print nozzle check(the plotter will be offline while it is in service mode, so you'll have to do it from the menu) if the print is fine just turn off the printer and after few seconds turn it back on it should start normally (just remember the sequence if you have the same problem again),
if the nozzle check is not fine or it gives some error then run cleaning or google the error (or contact service if you have service guy)
To start in service mode - With power off, hold paper feed (paper select) button and info button while powering on, release after initializing screen (see picture).
service mode.png
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