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S-7200C
19. TROUBLESHOOTING
156
Problem Possible cause Page
13 Broken needles
・ Is the material being pushed or pulled with excessive force during
sewing?
・ Is the needle properly installed?
If it is incorrect, install the needle correctly.
・ Is the needle bent, is the needle tip broken, or is the needle hole
blocked?
Replace the needle.
・ Is the needle and rotary hook timing correct?
Adjust the height of the needle bar.
Adjust the clearance between the needle and the tip of the
rotary hook.
・ Is the needle timing too advanced with respect to the feed dog?
Retard the needle timing.
・ It is extremely dangerous to leave any pieces of broken
needle sticking in the material. If the needle breaks, search
for all pieces until the whole of the needle is found again.
・ Furthermore, we recommend that through steps be taken to
account for such needles to comply with product liability
regulations.
Instruction
manual
122
123
122
14 Oil gauge (1) is not visible
in oil gauge window.
・ Is the oil tank empty?
(-[]0[], []3[] specifications)
Fill the oil tank with oil.
Instruction
manual
15 Machine does not operate
when power is turned on
and treadle is pressed.
・ Is the power supply connector
disconnected from the control
box?
Insert the connector
securely.
Instruction
manual
16 Machine does not operate
at high speed.
・ Is the sewing speed setting or backtack speed setting incorrect?
Set the maximum sewing speed to a higher speed (G10
operation panel)
Use the sewing speed control keys to set the high speed. (G50
operation panel)
Instruction
manual
Instruction
manual
17 Machine stops during
sewing.
・ Is the fixed stitch key turned on?
Press the fixed stitch key so that the indicator turns off. (G50
operation panel)
・ Is the power supply voltage too low?
Check the power supply.
(If the power cord is too long or too many appliances are being
run from a single outlet, this may cause voltage drops which will
in turn cause the reset function to activate and stop the
machine, even if the power supply itself is normal.)
Instruction
manual
0469M
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Caution