Negative Pressure Charge Error 1

Error code
  • 034820
Occurrence condition
  • Target pressure is not reached by negative pressure charge of CL0.
Assumed cause
  • Air leakage from air path in the Ink Supply Unit
  • Ink Supply Unit failure
  • Selector Unit failure
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