Xerox 4050 NPS, 4090 NPS, 4890 NPS, 4850 NPS manual 48-31

				PRINTER CONTROLLER MESSAGES
Message			Explanation/action
H311	Black developer housing		A black developer housing fault has been detected.
	fault.	1.		Press the Continue button.
		2.		If problem persists, notify your service representative.
H312	Color developer housing		A color developer housing fault has been detected.
	fault.	1.		Press the Continue button.
		2.		If problem persists, notify your service representative.
H313	Extended run without		Unable to restore the black toner patch voltage to the
	TAC control (black toner		correct value.
	patch)	1.		Press the Continue button.
		2.		If problem persists, notify your service representative.
H314	Extended run without		Unable to restore the color toner patch voltage to the
	TAC control (color toner		correct value.
	patch)	1.		Press the Continue button.
		2.		If problem persists, notify your service representative.
H318	Light black patches		The xerographic system is unable to retone the black
	(check black dry ink		developer housing in the allotted amount of time.
	supply).	1.		Check the black dry ink supply.
		2.		Press the Continue button.
		3.		If problem persists, notify your service representative.
H319	Light color patches		The xerographic system is unable to retone the color
	(check color dry ink		developer housing in the allotted amount of time.
	supply).	1.		Check the color dry ink supply.
		2.		Press the Continue button.
		3.		If problem persists, notify your service representative.
H321	Unable to complete a		The xerographic system is unable to complete a toner
	toner concentration		concentration adjustment in the allotted amount of time.
	adjustment in time.	1.		Press the Continue button.
		2.		If problem persists, notify your service representative.
H324	Failure of TAC sensor.
H333	Failure of control patch		The patch generator or the connection between the patch
	generator.		generator and the printer has failed.
		1.		Press the Continue button.
		2.		If problem persists, notify your service representative.
H335	Failure of ESV1.		Contact your service representative immediately.
H336	Failure of ESV2.		Contact your service representative immediately.
H337	Charge system fault.		A fault in the charge system has been detected.
		1.		Press the Continue button.
		2.		If problem persists, notify your service representative.

XEROX DOCUPRINT 4050/4090/4850/4890/92C NPS MESSAGES GUIDE 48-31