No Ink Printing After Installing an External CIS and Priming Dampers: Causes and Solutions

Question

After installing an external CIS system, I successfully filled the ink tanks and used a syringe to fill each damper one by one. Once everything was installed back onto the printer, it all appeared normal. However, when I ran a printhead check, no ink printed on the paper at all. I also tried printing on regular paper, but still no ink came out. When I removed the dampers, I could see ink sitting at the bottom of all of them. I also checked the carriage/cabin setting and set it to zero (0). What could be causing this, and how can I get the printer working again?

Answer

Why There Is No Ink on Paper Even Though the Dampers Contain Ink

If ink is visible at the bottom of all dampers but nothing prints, this means ink has reached the dampers but is not being pulled through the printhead. This almost always points to one or more of the following issues:

1. Air Trapped Between the Dampers and the Printhead

Even if you syringe-fill the dampers, air can still be trapped in the printhead's internal channels. Epson printheads rely on negative pressure (vacuum) to pull ink downward. Any air pocket breaks that suction entirely.

Key signs this is the issue:

• Dampers contain ink

• No ink appears on nozzle checks

• No dripping or smearing from the head

• Printer behaves normally with no error codes

What to do:

• Perform manual head priming from the capping station, not just the dampers

• Use a syringe with tubing on the waste ink line to gently pull ink through the head

• Never push ink upward into the head-always pull downward

2. Capping Station Not Sealing Properly

If the capping station is not sealing tightly against the printhead, the printer cannot create the vacuum needed to draw ink. This is one of the most common causes of a "no ink at all" situation after CIS installation.

Possible causes:

• Misaligned capping station

• Hardened or dirty cap rubber

• Cap height adjusted incorrectly

• CIS tubing pulling on the carriage and preventing full contact

What to check:

• Ensure the cap is centered under the printhead

• Clean the rubber cap thoroughly

• Make sure the carriage can fully park without resistance

3. Pump Assembly Failure or Disconnected Pump Tube

During CIS installation, it's easy to accidentally dislodge or kink the pump tubing. If the pump is not pulling, ink will never move past the dampers.

Signs of pump issues:

• No ink movement during cleaning cycles

• Waste ink tube remains dry

• No suction felt at the waste line

Fix:

• Inspect the pump tubing for kinks or air leaks

• Verify the pump motor engages during cleanings

4. Incorrect CIS Tank Height or Pressure Imbalance

Setting the CIS "cabin" or ink level reference incorrectly can create either too much back pressure or no pressure at all.

While setting it to zero (0) is usually correct, the physical height of the tanks relative to the printhead is just as important.

General rule:

• Tanks should sit roughly level with the printhead, not on the floor and not elevated

Incorrect height can completely stall ink flow without triggering an error code.

5. Damper Seating or Manifold Seal Issues

If the dampers are not fully seated or the O-rings are damaged, ink may appear present but cannot transfer into the head.

Check for:

• Loose dampers

• Cracked damper nipples

• Missing or pinched seals

Even a tiny air leak here will stop all ink flow.

6. Error Codes (or Lack of Them)

The absence of error codes such as 0x97, 0xEA, or carriage errors is actually meaningful here. It indicates:

• Electronics are working

• Carriage movement is normal

• The problem is purely mechanical or fluid-related, not electrical

Addressing printer issues can be a complicated affair due to the hands-on nature of the problems involved. Because of this, we're not able to provide remote troubleshooting, suggestions, or support for printer repairs. We do, however, offer an in-person evaluation and repair service through our local diagnostic facility at BCH Technologies Printer Repair Service (https://bchtechnologies.com/printer-repair-service). Due to high demand, repairs are handled on a first-come, first-served basis, and it may take a few weeks before we're able to accept your printer for drop-off.

Our services are designed to address either complete printer repairs or specific component-level issues, with clear instructions provided throughout the process. That said, we recognize that our rates may not be the most economical option. For this reason, we strongly encourage self-help through independent research. A great starting point is YouTube-especially our BCH Technologies YouTube channel (https://youtube.com/@bchtechnologies). You can use the search icon next to the "About" section on the right-hand side of the channel menu to locate videos on specific topics. I receive dozens of questions every day asking whether a particular video exists, and after creating content for over nine years, it's difficult to recall every single one. Using YouTube's built-in search is the fastest way to find what you need, and it may also suggest helpful videos from other creators.

Thank you again for reaching out and for your continued support. We truly appreciate you taking the time to share your experience, and we wish you the best of luck getting your printer back up and running.