Maintenance Pressure leak error
Error code
- 034879 Maintenance Pressure leak error
Occurrence condition
- The negative pressure failed to drop below the specified value in a pre-CL leak check.
Assumed cause
- Head cap touch failure
- Foreign substances in the space between the cap and head
- Deformed or missing cap lip
- Cap atmospheric relief valve leak
- Waste ink flow path leak
- Selector Unit failure
- Flow path valve leak
Related parts
- Cap Unit
- Waste ink tube unit
- Ink System Unit
Troubleshooting
Step |
Confirmation and action |
YES |
NO |
|---|---|---|---|
| 1 | Check the connection in the Cap Unit two-port joint
|
End | Go to step 2 |
| 2 | Check the joint connection between the Ink System Unit and main unit
|
End | Go to step 3 |
| 3 | 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]
[Action]
Is the error resolved? |
End | Go to step 4 |
| 4 | Replace the Cap Unit
|
End | Go to step 5 |
| 5 | Replace the Cap Motion Unit
|
End | Go to step 6 |
| 6 | Replace the Ink System Unit
|
End | Go to step 7 |
| 7 | Replace the waste ink tube unit
|
End | Go to step 8 |
| 8 | Replace the Main Board
|
End | Go to step 9 |
| 9 | Replace the MCU board
|
End | Contact EPSON Local Service Representatives |