Moneris V400c: Invalid Transaction Type Diagnostic... | terminalfaults.org

Technical Background:

The V400c relies on programmed transaction profiles and secure key exchange. An 'Invalid Transaction Type' error indicates a mismatch between the requested transaction type and the terminal's configuration or the acquiring bank's allowed transaction sets. Software configuration errors, corrupted firmware, or communication failures can trigger this error.

Symptoms:

The Moneris V400c terminal displays an 'Invalid Transaction Type' error during attempted transactions.

Possible Causes:

Incorrect transaction type selected on the terminal.
Terminal software configuration corrupted or outdated.
Communication error between the terminal and the payment processor.
Invalid merchant category code (MCC) configuration.
Firmware corruption due to power interruption during update.
EMV chip reader malfunction leading to misidentification of card type.

Solution:

1

Verify the selected transaction type is correct for the card being used.
2

Perform a terminal reboot by safely handling the power cable (unplug, wait 10 seconds, replug).
3

Force a terminal configuration update via the terminal menu (if accessible) or contact Moneris support for remote update initiation.
4

Inspect the EMV chip reader for any physical damage or debris; clean gently with a dry, lint-free cloth.
5

Check the network connection (Ethernet or Wi-Fi) for stability. A weak signal can cause communication errors.
6

Print a diagnostic report from the terminal (if available) and review error logs.
7

Contact Moneris support for assistance with verifying the merchant category code (MCC) and transaction type settings.

Safety Warning:

Safe Handling: Always unplug the terminal from the power source before cleaning or inspecting cables. Do not use excessive force when connecting or disconnecting cables. Risk of ESD in dry environments; ground yourself before touching the terminal. Never attempt to open the terminal casing, as this will trigger anti-tamper mechanisms and void the warranty. Internal modification is strictly forbidden.

Prevention:

Regularly clean the touchscreen with a manufacturer-approved cleaner. Ensure the power and network cables are securely connected and free from strain. Schedule terminal updates during off-peak hours to minimize disruption. Protect the terminal from excessive static discharge, especially in dry environments; use anti-static mats.

Expert Tip:

Try clearing the terminal's transaction history (if the option is available) before initiating a new transaction. A full transaction log can sometimes cause processing errors. Check the terminal's firmware version against the latest version published by Moneris to identify potential update requirements.

Frequently Asked Questions

•What is the procedure for manually updating the terminal configuration?

Refer to the Moneris V400c user manual or contact Moneris support for detailed instructions on manual configuration updates.

•How do I check the network connectivity of the terminal?

Navigate to the terminal's settings menu and locate the network configuration section. Verify the IP address, subnet mask, gateway, and DNS settings are correct. Ping a known address (e.g., 8.8.8.8) to test network connectivity.

•What type of cleaning solution is recommended for the touchscreen?

Use a commercially available screen cleaner specifically designed for electronic devices. Avoid using abrasive cleaners or solvents, as these can damage the screen.

Moneris V400c: Invalid Transaction Type Diagnostic Report

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the procedure for manually updating the terminal configuration?

•How do I check the network connectivity of the terminal?

•What type of cleaning solution is recommended for the touchscreen?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: