Check if the speed unit connector is loose or dirty. Restart the machine; if it persists, replace the speed control unit. Motor locked rotor
Electronic control systems for Siruba lockstitch machines often display error codes to signal protection modes or component failures. Error Code Potential Cause Recommended Solution Abnormal speed control unit connection siruba l818fm1 error list work
When your machine isn't functioning correctly but hasn't thrown a specific code, follow these standard diagnostic steps recommended in the Siruba L818F Instruction Manual : DL720 Series Check if the speed unit connector is loose or dirty
This is a power module protection. Check the main power board for signs of damage or short circuits. Tip-over protection switch Ensure the machine is in the correct upright position
Triggered when the machine head is tilted. Ensure the machine is in the correct upright position. Needle bar position error