Fault Code Fix
This section outlines the most common fault codes and recommended corrective actions.
Common Fault Codes & Solutions
Max Fonts
- Cause: Microcontroller overload
- Solution:
- Click Download
- Save your layout
- Restart the marking machine

Key Expired
- Cause: License key expiration
- Solution: Contact CMT to obtain an updated license key

Marking Machine Application Task Not Running
- Cause: Malfunction of firmware
- Solution: Restart the controller or power cycle the controller

Marking Machine Utility Task Not Running
- Cause: Malfunction of firmware
- Solution: Restart the controller or power cycle the controller

Timed Out While Holding
- Possible Causes:
- Marking head is not plugged in
- Mechanical issue with the marking head
- Solution:
- Verify all connections
- If the issue persists, the marking head may need to be returned to CMT for repair

Overcurrent Fault
- Possible Causes:
- Marking machine has been idle for an extended period
- Rapid software commands (e.g., aborting a mark and immediately commanding Home)
- Solution:
- Press the Home hardware button on the controller

General Recovery Procedure
When in doubt or if the issue is unclear:
- Download the layout again
- If unresolved, restart or power cycle the controller
If the issue persists and you have access:
- Test the marking machine using a known working controller
- Ensure the same version of I-Mark software is installed
Important: When using integrated systems, all controllers must run the same software version.
If no resolution is achieved, contact CMT for service or repair.
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