OKI ES9431 Error Codes list and solutions

OKI ES9431 Error Codes list and solutions

– Compatible Printer model: OKI ES9431
– OKI ES9431 Error Code description:

• Code: 001
• Display: Service Call 001:Error
• Description: Machine Check Exception hardware problem was detected (PCB failure or insufficient power capacity). (PDL only) When CE1 was not detected, SC001 occurs.
• Troubleshooting Guides: Replace the printer control PCB.

• Code: 002, 003, 005
• Display: Power Off/On 002:Error 003:Error 005:Error
• Description: CPU unexpected exception
• Troubleshooting Guides: Does this error message reappear? Yes Power OFF/ON. Replace the printer control PCB.

• Code: 012
• Display: Power Off/On 012:Error
• Description: A watchdog timeout occurred due to no system timer interrupt for unknown reasons.
• Troubleshooting Guides: Does this error message reappear? Yes Power OFF/ON. Replace the printer control PCB.

• Code: 020
• Display: Service Call 020:Error
• Description: The CU FW in Nand FLASH has not been detected, or a check SUM error has occurred.
• Troubleshooting Guides: Does this error message reappear? Yes Power OFF/ON. Replace the printer control PCB.

• Code: 024
• Display: Service Call 024:Error
• Description: CU Font ROM Hash Error
• Troubleshooting Guides: Does this error message reappear? Yes Power OFF/ON. Replace the printer control PCB.

• Code: 030
• Display: Service Call 030:Error
• Description: CU RAM Check Error
• Troubleshooting Guides: Does this error message reappear? Yes Power OFF/ON. Replace the printer control PCB.

• Code: 040
• Display: Service Call 040:Error
• Description: CU EEPROM Error
• Troubleshooting Guides: Does this error message reappear? Yes Power OFF/ON. Replace the printer control PCB.

• Code: 042, 043, 045
• Display: Service Call 042:Error 043:Error 045:Error
• Description: Flash File System Error
• Troubleshooting Guides: Failed to access to the Flash ROM that is mounted directly on the CU PCB. Format the Flash forcibly. (This requires caution as it erases NIC-F/W. The NIC-F/W must be written with the maintenance utility after formatting.) If the error remains, replace the printer control PCB.

• Code: 051
• Display: Service Call 051:Error
• Description: CU Fan Error Abnormal condition of the CPU cooling fan on the CU PCB
• Troubleshooting Guides: Is the CPU Fan connected properly? No Yes Connect it properly. Replace the fan. Does it recover from the error by replacing the fan? No Replace the printer control PCB.

• Code: 052
• Display: Power Off/On 052:Error
• Description: DMA Abort Error was detected with Image Processor.
• Troubleshooting Guides: Does this error message reappear? Yes Power OFF/ON. Replace the printer control PCB.

• Code: 067
• Display: Service Call 067:Error
• Description: A communication error was detected during communication with the Sleep Mode interface monitoring program.
• Troubleshooting Guides: A communication error was detected during communication with the Sleep Mode interface monitoring program. If power cycling does not solve the problem, maintenance by a service engineer is required.

• Code: 069
• Display: Service Call 069:Error
• Description: Malfunction of the NIC chip was detected.
• Troubleshooting Guides: Does this error recur? Yes Power OFF/ON. Replace the printer control PCB.

Solve OKI ES9431 Error codes

• Code: 070
• Display: Power Off/On 070:Error
• Description: Detection of abnormal condition of the PostScript firmware
• Troubleshooting Guides: Does this error recur? Yes Power OFF/ON. Replace the printer control PCB.

• Code: 072
• Display: Power Off/On 072:Error
• Description: I/F error between PU and CU
• Troubleshooting Guides: Does this error recur? Yes Power OFF/ON. Replace the printer control PCB.

• Code: 073
• Display: Power Off/On 073:Error xxxxxxxx
• Description: Detection of abnormal condition during image data expansion
• Troubleshooting Guides: Does this error recur? Yes Power OFF/ON. Replace the printer control PCB.

• Code: 074, 075
• Display: Power Off/On 074:Error xxxxxxxx 075:Error xxxxxxxx
• Description: Detection of abnormal condition during image data expansion
• Troubleshooting Guides: Does this error recur? Yes Power OFF/ON. Replace the printer control PCB.

• Code: 077
• Display: Power Off/On 077:Error xx
• Description: Detected of abnormal condition during image data expansion
• Troubleshooting Guides: Does this recur? Yes Power OFF/ON. Replace the printer control PCB

• Code: 081
• Display: Service Call 081:Error
• Description:
• Troubleshooting Guides: Does this error recur? Yes Power OFF/ON. Replace the printer control PCB.

• Code: 104
• Display: Service Call 104:Error
• Description: The engine EEPROM implementation check at power on showed no problem, but after that a read/write error was detected.
• Troubleshooting Guides: Does this error recur? Yes Power OFF/ON. Replace the printer control PCB.

• Code: 106
• Display: Service Call 106:Error
• Description: Abnormal engine control logic
• Troubleshooting Guides: Does this error recur? Yes Power OFF/ON. Replace the printer control PCB.

• Code: 108
• Display: Service Call 108:Error
• Description: 01: Detection of a watchdog timer error 02: Detection of an undefined interruption 03: Runaway of the CPU on the PU due to noise etc. 04: Runaway of the Port CPU due to noise etc. 05: Failure of access to the Dcon circuit of the printer control PCB 09: Detection of an error in clock adjustment to the duplex unit 0B: Detection of an error in clock adjustment to Tray 2 0C: Detection of an error in clock adjustment to Tray 3 0D: Detection of an error in clock adjustment to Tray 4 0E: Detection of an error in clock adjustment to Tray 5 0F: Communication failure with the spot color PCB 10: Runaway of the Driver CPU due to noise etc.
• Troubleshooting Guides: 01: Detection of a watchdog timer error Does this error recur? Yes Power OFF/ON. Replace the printer control PCB.
  02: Detection of an undefined interruption Does this error recur? Yes Power OFF/ON. Replace the printer control PCB.
  03: Runaway of the CPU on the PU due to noise etc. Does this error recur? Yes Power OFF/ON. Replace the printer control PCB.
  04: Runaway of the Port CPU due to noise etc. Does this error recur? Yes Power OFF/ON. Replace the printer control PCB.
  05: Failure of access to the Dcon circuit of the printer control PCB Does this error recur? Yes Power OFF/ON. Replace the printer control PCB.
  09: Detection of an error in clock adjustment to the duplex unit Does this error message reappear after power restoration? Yes Replace the unit concerned. Does this error message reappear after power restoration? Yes Replace the printer control PCB.
  0B: Detection of an error in clock adjustment to Tray 2 Does this error message reappear after power restoration? Yes Replace the unit concerned. Does this error message reappear after power restoration? Yes Replace the printer control PCB.
  0C: Detection of an error in clock adjustment to Tray 3 Does this error message reappear after power restoration? Yes Replace the unit concerned. Does this error message reappear after power restoration? Yes Replace the printer control PCB.
  0D: Detection of an error in clock adjustment to Tray 4 Does this error message reappear after power restoration? Yes Replace the unit concerned. Does this error message reappear after power restoration? Yes Replace the printer control PCB.
  0E: Detection of an error in clock adjustment to Tray 5 Does this error message reappear after power restoration? Yes Replace the unit concerned. Does this error message reappear after power restoration? Yes Replace the printer control PCB.
  0F: Communication failure with the spot color PCB Power OFF/ON. Does this error recur? Yes Replace the spot color PCB. Does this error recur? Yes Replace the printer control PCB.
  10: Runaway of the Driver CPU due to noise etc. Does this error recur? Yes Power OFF/ON. Replace the driver relay PCB. Does this error recur? Yes Replace the printer control PCB.

• Code: 111
• Display: Service Call 111:Error
• Description: A duplex unit for another model was detected.
• Troubleshooting Guides: Is a duplex unit provided for this model installed? Yes Install a correct duplex unit.

• Code: 112
• Display: Service Call 112:Error
• Description: A 2nd Tray for another model was detected.
• Troubleshooting Guides: Is a 2nd Tray provided for this model installed? Yes Install a correct 2nd Tray.

• Code: 113
• Display: Service Call 113:Error
• Description: A 3rd Tray for another model was detected.
• Troubleshooting Guides: Is a 3rd Tray provided for this model installed? Yes Install a correct 3rd Tray.

• Code: 114
• Display: Service Call 114:Error
• Description: A 4th Tray for another model was detected.
• Troubleshooting Guides: Is a 4th Tray provided for this model installed? Yes Install a correct 4th Tray.

• Code: 115
• Display: Service Call 115:Error
• Description: A 5th Tray for another model was detected.
• Troubleshooting Guides: Is a 5th Tray provided for this model installed? Yes Install a correct 5th Tray.

• Code: 121
• Display: Service Call 121:Error
• Description: High voltage power supply interface error
• Troubleshooting Guides: Is the fuse on the printer control PCB blown? Yes Replace the printer control PCB (then check the following).
  Is the cable connecting the printer control PCB to the high voltage power supply unit connected properly? No Re-connect it properly. Yes Check for defective contact points of the high voltage system.
  Is there any defective contact point? No Replace the high voltage power supply unit.

• Code: 123
• Display: Service Call 123:Error
• Description: Abnormal environment humidity or unconnected humidity sensor
• Troubleshooting Guides: Power OFF/ON. Does this error recur? Yes Replace the environmental sensor board and the FFC.
  Does this error recur? Yes Replace the printer control PCB.

• Code: 124
• Display: Service Call 124:Error
• Description: Abnormal environment humidity
• Troubleshooting Guides: Power OFF/ON. Does this error recur? Yes Replace the environmental sensor board and the FFC.
  Does this error recur? Yes Replace the printer control PCB.

• Code: 125
• Display: Service Call 125:Error
• Description: Multi-purpose Tray Home Error
• Troubleshooting Guides: Does the motor un in the motor testing of the PU self-diagnostic mode. Yes Check the sensor cable for a break or short, and the connector semilocking relay PCB and the printer control PCB for abnormal condition. No Check the hopping motor and the gear train for abnormal condition.

• Code: 126
• Display: Power Off and Wait for a while 126:Condensing Error
• Description: Dew condensation in the printer was detected.
• Troubleshooting Guides: This error tends to occur after a printer is carried in from the outsides. Leave the printer for 2 hours to half a day at room temperature, and turn on the power. After leaving the printer at room temperature, turn on the power again. Does this error recur? Yes Replace the environmental sensor board and the FFC. Does this error recur? Yes Replace the printer control PCB.

• Code: 128
• Display: Service Call 128:Error
• Description: 01: Fuser Exhaust Fan 1 02: Low Voltage Fan 03: PU Fan 05: Station 1 ID Intake Fan 09: Second Transfer Adsorption Fan 0A: Fuser Intake Fan 0B: Station 2 ID Intake Fan 0C: Duplex Fan 0D: Fuser Exhaust Fun 2 0E: Station 3 ID Intake Fan 0F: Station 4 ID Intake Fan 10: Station 5 ID Intake Fan
• Troubleshooting Guides: Is the cable to respective fans connected properly? No Re-connect the fan properly. Yes Replace the fan motor. Does this error recur? No Replace the applicable PCB. 01: Driver relay PCB 02: Printer control PCB 03: Printer control PCB 05: Driver relay PCB 09: Rail unit relay PCB 0A: Driver relay PCB 0B: Driver relay PCB 0C: Duplex unit PCB 0D: Driver relay PCB 0E: Driver relay PCB 0F: Driver relay PCB 10: Driver relay PCB

• Code: 134
• Display: Service Call 134:Error
• Description: LED head detection error (01=K, 02=C, 03=M, 04=Y, 05=W/CL)
• Troubleshooting Guides: Is the fuse blown? 134-05: Spot color PCB 134-01 to 04: Printer control PCB Yes Replace the PCB. Correct the FFC connection condition between the LED head and the PCB. No Correct the FFC connection condition. Does this error recur? Yes Replace the LED head unit. Does this error recur? Yes Replace either applicable PCB. 134-01 to 04: Printer control PCB 134-05: Spot color PCB

• Code: 135
• Display: Service Call 135:Error
• Description: 01: Tray1 Lift-up Motor Error 02: Tray2 Lift-up Motor Error 03: Tray3 Lift-up Motor Error 04: Tray4 Lift-up Motor Error 05: Tray5 Lift-up Motor Error
  07: Belt Motor Lock Error
  09:Fuser Motor Lock Error
  11:Station1 ID Motor Lock Error 12:Station2 ID Motor Lock Error 13:Station3 ID Motor Lock Error 14:Station4 ID Motor Lock Error 15:Station5 ID Motor Lock Error
• Troubleshooting Guides: Remove the paper cassette. Does the motor run in motor testing? Yes Replace the paper cassette. No Do the following check on motors and PCBs. Is the fuse on the PCB blown? Yes Replace the PCB. Is the motor resistant value abnormal, or is the motor wire disconnected or shorted? Yes Replace the motor. No Replace the PCB. 01: Printer control PCB 02 to 05: Option tray PCB
  Remove the belt unit. Does the motor run in motor testing? Yes Replace the belt. No Do the following check on motors and PCBs. Is there any abnormality with the mechanism, such as a blown motor fuse, a disconnected or shorted motor wire, and a broken gear? Yes Replace the motor, cable, and belt motor driving mechanism. No Replace the printer control PCB.
  Remove the fuser. Does the motor run in motor testing? Yes Replace the fuser. No Do the following check on motors and PCBs. Is there any abnormality with the mechanism, such as a blown motor fuse, a disconnected or shorted motor wire, and a broken gear? Yes Replace the motor, cable, fuser motor driving mechanism. No Replace the printer control PCB.
  Remove the ID unit. Does the motor run in motor testing? Yes Replace the ID unit. No Do the following check on motors and PCBs. Is the motor fuse blown? Yes Replace the motor. Is the motor wire broken or shorted? Yes Replace the cable. No Replace the driver relay PCB. Does the error recur? Yes Replace the ID motor driving mechanism.

• Code: 143
• Display: Service Call 143:Error
• Description: Image drum Up/ Down position detection error (01=K, 02=C, 03=M, 04=Y, 05=W/CL)
• Troubleshooting Guides: Reinstall the ID unit and the belt unit and then power off/on. Does the error recur? Yes Inspect the following. Detach the ID unit. Remove the rear cover and inspect the initial movement. Is there any abnormality with up/down movement? No Replace the ID unit. Yes Inspect the driver replay PCB, ID up/down sensor, ID motor driving mechanism.

• Code: 147
• Display: Service Call 147:Error
• Description: Toner supply motor error (01=K, 02=C, 03=M, 04=Y, 05=W/CL)
• Troubleshooting Guides: Remove the toner cartridge. Does the motor run in motor testing? Yes Replace the toner cartridge. No Do the following check on motors and PCBs. Is the motor resistant value abnormal, the motor wire disconnected or shorted? Yes Replace the motor. No Replace the driver relay PCB. Does the error recur? Yes Replace the toner supply mechanism.

• Code: 163
• Display: Service Call 163:Error
• Description: Toner sensor detection error (01=K, 02=C, 03=M, 04=Y, 05 =W/CL) This error does not occur with the factory default settings.
• Troubleshooting Guides: Is the stopper (orange) removed? No Remove the stopper. Is the ID unit prism soiled? Yes Clean it. No Replace the ID unit. Does this error recur? Yes Replace the driver relay PCB. Does this error recur? Yes Replace the toner low sensor board and the cable.

• Code: 166
• Display: Service Call 166:Error
• Description: An abnormality was detected with the power supply temperature thermistor. 01: The power supply thermistor is detected as shorted. 02: The power supply thermistor is detected as open. 03: The power supply thermistor indicates high temperature error. 04 : The power supply thermistor indicates low temperature error.
• Troubleshooting Guides: Does this error recur? Yes Power OFF/ON. Replace the printer control PCB.

• Code: 167
• Display: Service Call 167:Error
• Description: Thermistor slope error
• Troubleshooting Guides: Is the error message displayed? Yes Restore the power. Does this error recur? Yes After leaving the printer for 30 minutes, turn on the power again.

• Code: 168
• Display: Service Call 168:Error
• Description: 01: thermistor is detected as shorted 02: thermistor is detected as open 03: thermistor indicates high temperature error 04: thermistor indicates low temperature error
• Troubleshooting Guides: Is the error message displayed? Yes Restore the power. Does this error recur? Yes After leaving the printer for 30 minutes, turn on the power again. When the power is restored for the 168-03 error, the display changes to Service Call 994: Error.

• Code: 169
• Display: Service Call 169:Error
• Description: 01: thermistor is detected as shorted 02: thermistor is detected as open 03: thermistor indicates high temperature error 04: thermistor indicates low temperature error
• Troubleshooting Guides: Is the error message displayed? Yes Restore the power. Does this error recur? Yes After leaving the printer for 30 minutes, turn on the power again

• Code: 170, 171
• Display: Service Call 170:Error 171:Error
• Description: Short circuit (170) or open circuit (171) of the fuser thermistor was detected.
• Troubleshooting Guides: Does this error recur? Yes Restore the power. Replace the fuser unit.

• Code: 172, 173
• Display: Service Call 172:Error 173:Error
• Description: An abnormal (172: high or 173: low) temperature of the fuser thermistor was detected.
• Troubleshooting Guides: Does this error recur? Yes Restore the power. Replace the fuser unit. When the power is restored, the display may change to Service Call 994: Error in some cases.

• Code: 181 … 185
• Display: Service Call 181:Error 182:Error 183:Error 184:Error 185:Error
• Description: Option unit I/F error (181 = Duplex Unit, 182, 183, 184, 185 = Optional Tray)
• Troubleshooting Guides: Does this error recur? Yes Restore the power. Check to make sure the contact points of the connector and replace the optional unit.

• Code: 188
• Display: Service Call 188:Error
• Description: 01: Error in communication with Port CPU.
  02: Error in communication with Driver CPU
• Troubleshooting Guides: 01: Error in communication with Port CPU Power OFF/ON. Does this error recur? Yes Replace the printer control PCB.
  02: Error in communication with Driver CPU Does this error recur? Yes Replace the Driver PCB.

• Code: 190
• Display: Power Off/On 190:Error
• Description: System memory overflow
• Troubleshooting Guides: Power OFF/ON. Does this error recur? Yes Replace the printer control PCB.

• Code: 203, 204
• Display: Power Off/On 203:Error 204:Error
• Description: CU program error (not occur in normal operation)
• Troubleshooting Guides: Power OFF/ON. Does this error recur? Yes Replace the printer control PCB.

• Code: 207, 208
• Display: Power Off/On 207:Error 208:Error
• Description: CU program error (not occur in normal operation)
• Troubleshooting Guides: Power OFF/ON. Does this error recur? Yes Replace the printer control PCB.

• Code: 213, 214
• Display: Power Off/On 213:Error 214:Error
• Description: CU program error (not occur in normal operation)
• Troubleshooting Guides: Power OFF/ON. Does this error recur? Yes Replace the printer control PCB.

• Code: 230
• Display: Service Call 230:Error
• Description: Tag Reader Missing
• Troubleshooting Guides: Power OFF/ON. Does this error recur? Yes Replace the tag reader/writer PCB and the FFC. Does this error recur? Yes Replace the printer control PCB.

• Code: 231
• Display: Service Call 231:Error
• Description: 01: PU-Tag Reader Interface Error 02: Tag Reader circuit abnormality 03: Tag Interface Error
• Troubleshooting Guides: Power OFF/ON. Does this error recur? Yes Replace the tag reader/writer PCB and the FFC. Does this error recur? Yes Replace the printer control PCB.

• Code: 241 … 245
• Display: Service Call 241:Error ~ 245:Error
• Description: Engine Program Memory Error 241: DUPLEX Flash memory error 242: Option Tray2 243: Option Tray3 244: Option Tray4 245: Option Tray5
• Troubleshooting Guides: Power OFF/ON. Does this error recur? Yes 241: Replace the DUPLEX PCB. 242-5: Replace the option tray PCB.

• Code: 247
• Display: Service Call 247:Error
• Description: Engine PORT CPU Program Memory Error
• Troubleshooting Guides: Power OFF/ON. Does this error recur? Yes Replace the printer control PCB.

• Code: 249
• Display: Service Call 249:Error
• Description: Engine DRIVER CPU Program Memory Error
• Troubleshooting Guides: Power OFF/ON. Does this error recur? Yes Replace the driver relay PCB.

• Code: 250
• Display: Power Off/On 250:Error
• Description: Secure File Erasing Error
• Troubleshooting Guides: An encrypted file erasing error was detected. Did the user accept to execute HDD ERASE? ADMIN MENU HDD ERASE informing the user of the necessity to execute Disk ERASE to delete the encrypted file and restore the HDD defaults.

• Code: 251
• Display: Service Call 251:Error
• Description: Secure Disk Erasing Error
• Troubleshooting Guides: An error was detected during Disk ERASE. Power OFF/ON. Does this error message reappear? Yes Replace the HDD.

• Code: 254
• Display: Service Call 254:Error
• Description: An unexpected error occurred during initialization of the Security mode. Error cause information is displayed after the error code number.
• Troubleshooting Guides: Power OFF/ON. Does this error message reappear? Yes Regenerate an encryption key. If it doesn’t solve the problem, replace the CU PCB.

• Code: 257
• Display: Service Call 257:Error
• Description: An unexpected error occurred during initialization of the HDD. Error cause information is displayed after the error code number.
• Troubleshooting Guides: Power OFF/ON. Does this error message reappear? Yes Format the HDD again. If it does not solve the problem, replace the HDD

• Code: 901, 902
• Display: Power Off/On 901:Error 902:Error
• Description: Short circuit (901) or open circuit (902) with the belt thermistor was detected.
• Troubleshooting Guides: Check the belt thermistor wiring. (Is there any abnormal condition with the belt unit, contact substrate which is the tag terminal PCB of the printer unit, or the cable)? Yes Replace the part or the belt unit. No Replace the driver relay PCB.

• Code: 903, 904
• Display: Power Off/On 903:Error 904:Error
• Description: The belt thermistor detected abnormal temperature. 903:too high 904:too low
• Troubleshooting Guides: Check the belt thermistor wiring. (Is there any abnormal condition with the belt unit, contact substrate which is the tag terminal PCB of the printer unit, or the cable)? Yes Replace the part or the belt unit. No Replace the driver relay PCB.

• Code: 993
• Display: Service Call 993:Error
• Description: An error was detected with the paper thickness sensor power cable
• Troubleshooting Guides: Power OFF/ON. Does this error recur? Yes Replace the paper thickness sensor and the cable. Does this error recur? Yes Replace the printer control PCB.

• Code: 994
• Display: Service Call 994:Error
• Description: A fuser where a high temperature error was detected is installed.
• Troubleshooting Guides: Power OFF/ON. Does this error recur? Yes Replace the fuser unit.

• Code: F0C
• Display: Power Off/On F0C:Error
• Description: CU program error
• Troubleshooting Guides: Power OFF/ON. Does this error recur? Yes Replace the printer control PCB.

• Code: FFF
• Display: Power Off/On FFF:Error
• Description: CU program error
• Troubleshooting Guides: Power OFF/ON. Does this error recur? Yes Replace the printer control PCB.

– Get more information about Epson XP 15000 troubleshooting, click here

– Get more error code list with quick guide to fix printer product, click here
– About get help with reseting Epson inkpad or others, click here

Waste Ink Pad Counter Utility Functions:

– Cleaning printhead.
– Ink charge.
– Fix Epson red lights blinking Error

– Fix Epson Service Required Error: A printer’s ink pad at the end of its service life Please contact Epson Support.

– Check the current value of waste ink counters and ink level counters.
– Clear Waste Ink Counters.
– Read and write serial number.
– Read and write USB ID.
– Read and write HEAD ID.
– Make EEPROM dump, backup.
– Paper feed test.
– Nozzle check.
– Color check pattern.
– Initialize (disable) PF deterioration offset.
– Retrieve device information

Contact us to get support with OKI ES9431 Error case

Telegram: https://t.me/hyperaktiv
Facebook: https://www.facebook.com/dngnm/
Or click here to get more ways.