W-01EcoTank ET-4850

Epson EcoTank ET-4850 error W-01: Maintenance Box

The Epson EcoTank ET-4850 error W-01 is a maintenance alert notifying that the waste ink collection box is reaching its limit. Epson printers use this internal reservoir to hold ink used during periodic self-cleaning tasks. If ignored, the printer will eventually stop printing entirely to prevent a leak.

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Common causes

  • 1Maintenance cycle: Cumulative usage of auto-cleanings.
  • 2End-of-life: Natural capacity limit reached.
  • 3Chip count: Internal sensor limit triggered.

Solutions

Diagnóstico rápido

This code is a 'soft' warning. It lets you continue printing for a short period, but you should source a replacement maintenance box immediately to avoid a full lock-out.

Solución paso a paso

  1. Purchase: Buy an original maintenance box compatible with the ET-4850.
  2. Locate: Find the maintenance box door on the back of the printer.
  3. Swap: Slide out the old box and replace it with the new unit.
  4. Verify: The printer will automatically reset the W-01 warning upon detecting the new box's chip.

Prevención y mantenimiento

Minimize excessive head cleanings. Only run them if print quality is visibly failing.

Cuándo llamar a un técnico

If replacing the maintenance box does not clear the W-01 error, contact official support as the internal software counter may need an authorized reset.

Ficha técnica del equipo

  • Technology: Inkjet (EcoTank)
  • Speed: 15.5 ipm
  • Connectivity: USB / Wi-Fi / Ethernet
  • Capacity: 250 sheets
  • Consumibles: 502 series ink / original maintenance box
  • Recommended usage: Home & Small Office
  • Official drivers / firmware

Frequently asked questions

The W-01 error indicates that the maintenance box (waste ink collector) is near capacity and must be replaced soon.

The printer will eventually lock out permanently to prevent waste ink leakage that could damage internal circuits.

Cleaning the pad is ineffective and messy because it is saturated with waste ink. It's best to buy a replacement part.

Yes, frequent head cleaning cycles fill the maintenance box much faster than actual printing.

Epson EcoTank ET-4850 error W-01: Maintenance Box | Vimazdev