Hello JS,
This fault means “Printhead reservoir heater took too long to reach setpoint temp”. Unfortunately, there isn't anything that you can do to try and resolve this issue on your own other than turn the power off, wait one minute and then turn the power back on to your machine. If this resolves the issue, then you won't need a service call. If, however, it does not fix the problem, you will need to call the Xerox Customer Technical Support Line at 1.800.835.6100.
John
