Repair knowledge maintenance
trouble shooting [ 1 ] [ 2 ]

  Unable to start

Probable causes

Actions

Belt is loose or broken
Tighten or replace belt
Fuse for power or circuit blown out
Check ampere capacity and replace fuse
Needle position signal or one-rotation signal is not detected
Adjust needle position with wrench so that needle position LED come on
Frame limit switch is actuated
Move frame to appropriate position
Abnormality warning lamp in drive unit is on
Clean air filter
Incomplete contact of connectors in control box
Securely couple connectors
Incomplete contact of connectors in main shaft drive motor control box
Securely couple connectors

  Color change incorrect
Probable causes Actions
Incorrect stop position
Manually set main shaft to fixed position
Needle position and one-rotation signals are not detected
Adjust needle position with wrench so that stop position indicating lamp comes on
Incorrect needle bar position
Set position correctly
Incorrect take-up lever position
Adjust take-up lever so that it coincides with others in position at fixed position
Relay or fuse for color change defective
Replace relay or fuse