JUKI AW-3S, Instruction Manual

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Display and
description of
error
Cause Error handling procedure
E076
Bobbin-thread
winding is not
carried out nor-
mally.
① Obstacles such as dust, etc.
gather on the moving section.
○ Carry out maintenance referring to "4-2. Cleaning"
p.39 .
② Thread of the bobbin thread
cone has run out during wind-
ing of a bobbin.
○ Put the bobbin thread cone in place.
③ Thread has broken during
winding of a bobbin.
○ Referring to
"3-2. How to thread the device with
the bobbin thread" p.6
, check the thread ten-
sion.
④ Thread wound on the bobbin
overflows from the bobbin
flange.
○ Check the setting of bobbin-thread winding length.
○ Check whether or not the thread used in the previous
sewing still remains on the bobbin.
⑤ Bobbin fails to rotate. ○ Referring to "3-3. How to set a bobbin" p.8 ,
check whether or not the bobbin is fitted in the bob -
bin case correctly.
⑥ Thread slips out of the roller of
bobbin thread feeding unit.
○ If the thread tension is not sufficient, thread may
slip off the roller. Check the thread tension.
⑦ Bobbin thread feeding unit fails
to operate.
○ Check whether or not the connector, air tube, etc.
coming from the bobbin thread feeding unit are
correctly connected.
⑧
Thread has tangled on the
thread stand, etc. since the
thread has vibrated excessive-
ly halfway through threading
route.
○ Check the threading route referring to "3-2. How
to thread the device with the bobbin thread"
p.6 . In particular, the roller and actuating arm,
etc. of the bobbin thread feeding unit are threaded
correctly.
E311
Cover of the
AW device is
left opened. ① Cover is left opened. ○ Check the cover status.
② Microswitch is not correctly
positioned.
○ Check the position of the microswitch.
③ Microswitch cable is discon-
nected.
○ Check whether the microswitch cable is connected
to the AMS main PCB.
④
There is no microswitch signal. ○ Check the microswitch signal.