Frymaster M3000 Fryer Error Code E19: CAN TX Full
M3000 CAN TX FULL (E19) on a Frymaster Gen II LOV fryer with the M3000 computer means the connection between the computers is lost. The manual says to check the CAN connections and the software versions, then call service.
Medium: the computers cannot share data, so linked functions may not work, but the fryer may still heat.
What does Frymaster error code M3000 CAN TX FULL mean?
The M3000 computers in a battery or in a split-vat fryer share information over a CAN network, and each one sends messages to the others. When messages cannot be sent or received, because the link is broken or the buffer fills, the computer logs E19 and shows M3000 CAN TX FULL. The manual describes it as the connection between the computers being lost, and says to check CAN connections and software versions, then call service. A loose connector, a damaged cable or computers running different software versions are the likely places to look. This message is about the computer-to-computer link. E15 is a related message about the cooking computer losing the MIB board. Both point at the same network, but at different ends. E19 appears in the Gen II LOV M3000 table and does not exist on the 3000/3010 controller.
Affected models and control systems
Gen II LOV fryers with the M3000 computer, BIELA14 series electric; the BIGLA30 gas fryer uses the same computer family.
Code numbers and their meaning can change between control generations. We match the full model and control before acting on a code.
What you may notice
- M3000 CAN TX FULL on the computer
- Alarm sounding
- One computer not responding like the other
- Shared functions such as filtering not coordinating
Possible causes
Likely causes — what usually sits behind error code M3000 CAN TX FULL on this control. A technician confirms which one it is before any part is replaced.
- A CAN connector between computers that has loosened or corroded
- A cable damaged where it passes the cabinet door or a hinge
- Computers on different software versions after a replacement or update
Safe checks before calling for service
- Silence the alarm and read the message.
- Turn the fryer off, wait a minute, then turn it back on to see whether the link returns.
- Do not unplug or reroute the computer cables.
- Tell the technician if a computer or board was recently replaced.
How a technician diagnoses error code M3000 CAN TX FULL
- Read the error log for E19 and E15.
- Check the software version on each computer, as the manual says.
- Inspect the CAN connections and cable condition.
- Test the CAN wiring for continuity and shorts with power off.
- Replace the cable or computer only after the link has been tested.
- Software versions are read and loaded through the service menus.
- Network wiring runs inside control cabinets with mains-powered parts.
- Telling a damaged cable from a failing computer takes a meter and spare parts.
How error code M3000 CAN TX FULL differs from similar codes
E19 is the loss of the link between computers; E15 is the cooking computer losing the MIB.
Technical reference
- Maker documentation
- Frymaster owner support
- Edition
- May 2011, 819-6446
- Models / control
- 3000 controller / M3000
- Section
- 1.14.4 Error Log Codes, p. 1-35
- Checked
- October 2026
We use the maker's document to read the code and do not reproduce it. Always confirm the complete model and control before applying these steps.
Related Frymaster fryer error codes
Does CAN TX FULL mean a bad computer?
Not necessarily. The manual lists connections and software versions as the first checks.
Is E19 the same as E15?
No. E19 is the link between computers; E15 is the cooking computer losing the MIB.
What if it appears after a software update?
Mention it to the technician, since mismatched versions are one of the checks in the manual.
Need help with Frymaster error code M3000 CAN TX FULL?
A technician confirms the cause on site and gives you the price in writing before any work starts.