Owner's Manual

S-7200B
14. TROUBLESHOOTING
60
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 we recommend that through
steps be taken to account for such needles to comply with
product liability regulations.
13
54*
55*
54*
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. 8
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. 11
16 Machine does not operate
at high speed.
 Is the sewing speed setting or backtack speed setting incorrect?
Use the sewing speed control keys to set the high speed.
18
17 Machine stops during
sewing.
 Is the fixed stitch key turned on?
Press the fixed stitch key so that the indicator turns off.
 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.)
18
*
Caution
0469M
2195M
2196M