Lubricate the machine thoroughly. If the machine has been sitting idle, the oil may have gummed up the internal bearings. E7: Positioner (Encoder) Error The machine doesn't know where the needle is (up or down).
Follow the wire originating from the motor's rear or the handwheel back to the control panel box.
Voltage is too high (19) or too low (20). Check your power supply stability. Overvoltage / Inertia siruba l818fm1 error list work
Ensure the upper thread is passing smoothly through all standard tension discs and guides without catching on burrs.
Check the power supply voltage. If the machine inertia is too high, you may need to lengthen the deceleration time in settings. Motor / Machine Locked Lubricate the machine thoroughly
: Only use original Siruba L818F parts like the P701 presser foot to maintain factory specifications. Siruba L818F-BM1BH1 Instruction Manual.pdf
: This often points to a problem with the foot controller or a short-circuited solenoid. Follow the wire originating from the motor's rear
The motor is not rotating properly. This is typically due to a mechanical obstruction (like jammed thread in the hook) or a motor connection issue.
Keeping a Siruba L818FM1 running reliably is mostly about quick diagnosis and routine maintenance: power-cycle and note codes, inspect and clean mechanical parts, replace consumables, and escalate to a qualified technician for electronic or internal-timing faults. Document errors and steps taken to speed repairs.
Look behind the machine head base to find the small safety rod or microswitch.