Pressure sensor error 1 to 3

Error code
  • 034860 Pressure sensor error 1
  • 034861 Pressure sensor error 2
  • 034862 Pressure sensor error 3
Occurrence condition
  • The value measured by the pressure sensor is outside the threshold range even though it should be atmospheric pressure.
  • The zero-point correction value of the pressure sensor is outside the threshold range.
  • The internal air could not be released during initialization operation of the valve selector.
Assumed cause
  • Pressure sensor failure
  • Selector Unit failure
  • +3.3V power is not supplied
Related parts
  • Ink System Unit
Troubleshooting
Step Confirmation and action YES NO
1

Check harness connection

Are the harness connectors that connect to the Ink System Unit properly connected?

If not, reconnect them properly.

[Part(s) to be checked]

  • Ink System Unit Connector
  • Other connectors and FFCs you disconnected and reconnected

[Action]

  • Connect the connectors properly.

Is the error resolved?

 End

Go to step 2
2

Replace the Ink System Unit

  • Did the trouble go away?
 End Go to step 3
3

Replace the Main Board

  • Did the trouble go away?
 End Go to step 4
4

Replace the MCU board

  • Did the trouble go away?
 End

Contact EPSON Local Service Representatives