- Printers
- Inkjet printer
314
Epson 314 on inkjet printer: email attachment exceeds limit
Risk level
Low
Usually safe to check without specialist tools.
Urgency
Low
Quick answer
Code 314 in Job Status on your Epson EcoTank means 'The data size exceeds the maximum size for attached files' when scanning to email: increase Attached File Max Size, or lower the Resolution and raise the Compression Ratio.
Safety first
Stop and check this first
- Even if you increase Attached File Max Size on the printer, your mail server or the recipient's email provider may still reject attachments above its own limit.
Safe checks you can perform
- Check the Attached File Max Size setting under Scan > Email
- Lower the Resolution and increase the Compression Ratio
- Split multi-page originals into smaller batches per email
Leave these tasks to a qualified professional
- Do not attempt this professional task: Epson support for Scan to Email attachment settings
- Do not attempt this professional task: Email server or network administrator
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Epson support for Scan to Email attachment settings
What they doIf Attached File Max Size is set to a high value and a single black-and-white page at low resolution still fails with code 314, contact Epson support.
They must show youa single-page test Scan to Email job completing in Job Status.
In writingthe settings or firmware check performed and the Epson case number.
Email server or network administrator
What they doIf you are unsure how large an attachment your office SMTP server accepts before raising Attached File Max Size, ask your mail or network administrator.
They must show youthe maximum attachment size in megabytes supported by the mail server.
In writingthe recommended Attached File Max Size value or alternative network folder path.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Check the Attached File Max Size setting under Scan > Email
- Who:
- you, on the EcoTank control panel.
- How:
- open Scan > Email, go to the scan menu options, and inspect the Attached File Max Size setting to see whether a larger maximum file size can be selected.
- Result that matters:
- raising the attachment size ceiling allowed by the printer.
- If a small limit was selected:
- increase Attached File Max Size and retry the scan.
- If it is already set to the highest limit your mail server allows:
- reduce the scan file size.
- Evidence to keep:
- a photo of the Attached File Max Size setting on the control panel.
Evidence: Epson ET-5800 series: Error Code is Displayed on the Status Menu · Epson ET-5800 series: Scan Menu Options for Scanning to an Email
Lower the Resolution and increase the Compression Ratio
- Who:
- you, in the Scan to Email menu options.
- How:
- in Scan > Email, lower the scanning Resolution, increase the Compression Ratio, and switch Color Mode to B&W or Grayscale if full color is not needed.
- Result that matters:
- shrinking the scanned attachment so it stays below the size limit.
- If the email sends without code 314:
- the reduced file size fits within the cap.
- If a multi-page document still exceeds the limit:
- split the pages into smaller batches.
- Evidence to keep:
- a photo of the selected Resolution, Compression Ratio, and Color Mode.
Evidence: Epson ET-5800 series: Error Code is Displayed on the Status Menu · Epson ET-5800 series: Scan Menu Options for Scanning to an Email
Split multi-page originals into smaller batches per email
- Who:
- you, when loading originals into the ADF or scanner glass.
- How:
- divide a long document into two or more smaller batches of pages and send each batch in a separate Scan to Email job.
- Result that matters:
- keeping each individual email attachment under the Attached File Max Size limit.
- If smaller batches go through normally:
- total page count caused the 314 error.
- If you need to send large files without splitting:
- check server limits or scan to a network folder.
- Evidence to keep:
- the Job/Status > Job Status log showing the completed email jobs.
Evidence: Epson ET-5800 series: Error Code is Displayed on the Status Menu · Epson ET-5800 series: Scan Menu Options for Scanning to an Email
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Printers
- Brand
- Epson
- Product type
- Inkjet printer
Known code variants
- Ariston 314
- Ariston 314 repeated ON/OFF
- Ariston error 314
- Ariston Lydos error 314
- Ariston Nuos error 314
- Attached File Max Size Epson
- código 314 Epson
- EcoTank 314 archivos adjuntos
- EcoTank 314 attached files
- El tamaño de los datos es mayor que el máximo admitido para archivos adjuntos
- Epson 314
- Epson error code 314
- Epson ET-5800 314
- Epson ET-5805 314
- Epson L6550 314
- Error 314 Ariston
- Lydos Hybrid 314
- Nuos Plus 314
- ON/OFF repetido 314 Ariston
- Ta máx arch ad Epson
- The data size exceeds the maximum size for attached files
What it means
In Epson's User's Guide for the ET-5800, ET-5805, and L6550 series ('Error Code is Displayed on the Status Menu' and 'Scan Menu Options for Scanning to an Email'), code 314 is logged in Job/Status > Job Status with the exact description 'The data size exceeds the maximum size for attached files.' Other models may use different menus, and the code alone never proves a hardware part is faulty.
Warnings and stop conditions
- Loweditorial warning
Even if you increase Attached File Max Size on the printer, your mail server or the recipient's email provider may still reject attachments above its own limit.
Evidence: Epson ET-5800 series: Scan Menu Options for Scanning to an Email
Symptoms and causes
Probable causes · in order
- Low cap selected in the Attached File Max Size settingCommon
The Attached File Max Size option in the Scan to Email menu limits the attachment size to a threshold smaller than the scanned document.
Evidence: Epson ET-5800 series: Error Code is Displayed on the Status Menu · Epson ET-5800 series: Scan Menu Options for Scanning to an Email
- High scanning Resolution or low Compression Ratio in Scan to EmailCommon
Scanning in color at a high Resolution with a low Compression Ratio produces a large PDF or JPEG file that exceeds the attachment limit.
Evidence: Epson ET-5800 series: Error Code is Displayed on the Status Menu · Epson ET-5800 series: Scan Menu Options for Scanning to an Email
- Too many original pages combined into a single email jobPossible
Loading a large stack of pages into one Scan to Email job creates an attachment whose total file size goes over the configured maximum.
Evidence: Epson ET-5800 series: Error Code is Displayed on the Status Menu · Epson ET-5800 series: Scan Menu Options for Scanning to an Email
Virtual technician
Does 314 still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
- 1
Epson ET-5800 series: Error Code is Displayed on the Status Menu
Epson · 2023 · official_doc
- 2
Epson ET-5800 series: El código de error se muestra en el menú de estado
Epson · 2023 · official_doc
- 3
Epson ET-5800 series: Opciones del menú de escaneado para escanear a un correo electrónico
Epson · 2023 · official_doc
- 4
Epson ET-5800 series: Scan Menu Options for Scanning to an Email
Epson · 2023 · official_doc
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