OKI Pro9431 ERROR CODES

OKI Pro8432WT error codes Troubleshooting fatal errors and service call code errors

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Full list of error codes and resolutions

OKI PRO PRINTERS FATAL ERROR and SERVICE CALL CODES

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OKI Pro8432WT: Ideal for many types of transfer printing, offering A3 print with white toner capability.
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COMMON OKI PRO 8432WT PRINTER FATAL errors AND SERVICE CALL codes and ERRORS

OKI PRO8432WT Fatal Errors & Service Call Codes

What is a Service Call / Fatal Error?
Service call and fatal error codes on the OKI PRO8432WT indicate serious hardware or firmware issues.
They often require power-cycle procedures, component replacement, or professional servicing.
These codes appear as “Service call xxx: Error” or “Power off/on xxx: Error” on the printer display.

Common Fatal Error Codes & Solutions

Error Code	Display	Cause / Description	Recommended Remedy
001	Service call 001: Error	Machine Check Exception (board/power fault)	Replace CU/PU main board
002–007, 009–011	Power off/on xxx: Error	CPU unexpected exception	Power-cycle; if recurring, replace CU/PU board
020, 023, 030, 042, 043, 045	Service call xxx: Error	CU program/ROM/Flash hash or access error	Power-cycle; replace CU/PU board
049	Service call 049: Error	CU and engine head resolution mismatch	Replace appropriate CU board or printhead
052, 067, 069, 070, 072–077	Various Errors	Image processor, NIC, Sleep-interface, or engine I/F faults	Power-cycle; if persistent, replace CU/PU board
081, 104, 106	Service call xxx: Error	EEPROM read/write failure	Power-cycle; replace CU/PU board
111–114	Service call xxx: Error	Incorrect option unit (duplex/trays) installed	Install correct optional unit
121, 122	Service call 121/122: Error	High/low-voltage PSU or fan malfunction	Check connections; replace PSU or fan unit
123, 124	Service call 123/124: Error	Humidity sensor fault	Replace control-panel (PCQ) board
126, 127, 128	Service call xxx: Error	Condensation or fan errors (fuser, belt, ID)	Warm to room temp; power-cycle; replace fan or board
131–134	Service call xxx: Error	LED-head detection/fuse fault	Reseat/replace LED head and fuse; replace unit
142	Service call 142: Error	Image drum position detection	Reseat drum; check cables/clutch; replace board if needed
154, 155	Service call 154/155: Error	Belt or fuser fuse blown	Reseat, power-cycle; replace CU/PU board if needed
160–163	Service call xxx: Error	Toner sensor cartridge errors	Reseat cartridge; replace sensor assembly if recurring
166–177	Service call xxx: Error	Fuser/power supply thermistor faults	Power-cycle; replace PSU, fuser or CU/PU board
181–184	Service call xxx: Error	Option-unit I/F interface errors	Reseat/replace optional units (duplex/trays)
190	Power off/on 190: Error	System RAM overflow	Power-cycle; install additional RAM DIMM
200–202, 203–204, 207–208, 213–214	Various Errors	Firmware download or program errors	Power-cycle; if persists, replace CU/PU board
209	Power off/on 209: Download Error	Custom media-type table download failed	Power-cycle and retry download
230–232	Service call xxx: Error	RFID unit/panel or drum tag misread	Reattach cables; power-cycle; replace RFID or drum units
250, 251, 254, 257	Various Errors	SD card/encryption key initialization errors	Power-cycle; format/replace SD card or regenerate key
901–904	Power off/on xxx: Error	Belt thermistor short, open, extreme temp	Reseat cable; power-cycle; replace belt thermistor
918	Power off/on 918: Error	Duplex unit fan failure	Check install; replace duplex fan unit
923	Power off/on 923: Error	Image drum ID motor fault	Reseat drum; replace drum or ID motor
928	Power off/on 928: Error	Fuser motor fault	Reseat fuser; replace motor/unit
931–935	Power off/on xxx: Error	Option-unit CPU clock errors	Replace faulty unit or CU/PU board
941–945	Power off/on xxx: Error	Watch-dog, interrupts, SDRAM/PU CPU errors	Power-cycle; replace CU/PU board
980	Power off/on 980: Error	Fuser unit abnormal temperature	Power-cycle; replace fuser
982–987	Service call xxx: Error	Excess trays or cartridge tag mismatch	Remove extra trays; replace cards/drums or CU board
999, F0C, F0D, FFE, FFF	Various Errors	CU/PU firmware or program critical fault	Power-cycle; replace CU/PU board and reflash firmware

OKI PRO8432WT Error Code FAQ

What should I do when my OKI PRO8432WT displays “Service call xxx: Error”?

First, power the printer off and back on. If the error reappears, check the code in the table above to identify the issue. Some errors require professional repair or part replacement.

Can I clear a fatal error myself?

Some errors caused by temporary glitches can be cleared by restarting the printer. Persistent errors usually require part replacement, such as a fuser, CU board, or PSU, and should be handled by a qualified technician.

What does “Power off/on xxx: Error” mean?

It means the printer has encountered a serious fault and requires a restart. If restarting does not fix the problem, refer to the error table above for solutions.

How can I prevent service call errors?

Keep the printer in a clean, dry, and temperature-controlled environment. Perform regular maintenance, use correct consumables, and update firmware as needed.

Where can I find parts for the OKI PRO8432WT?

Replacement parts can be obtained through authorised OKI dealers or certified service partners. This includes fusers, belts, LED heads, control boards, and sensors.

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