JUKI HZL-F series, Инструкция по эксплуатации, Страница: 152 / 168

If sewing difficulties occur, make sure the instructions are correctly followed.
If a problem still exists, the reminders below may help solve it.
Case Cause (Reason) Solution
Refer-
ence
page
● The machine stops sewing
suddenly.
(This is in case you can
turn hand wheel by hand.)
● The machine sews at slow speed
continuously.
(The machine has a mechanism to
automatically cut off the power to prevent
the motor from overheating.)
● Turn off the power and wait for a
while (about 10 minutes). The safety
mechanism will be reset and the
machine will return to normal.
2
● The machine will not
work even when started.
● Presser foot is in up position. ● Lower the presser foot and start to
sew.
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● The machine will not work
even when start/stop
button is pressed.
(This is in case sewing
light is still on.)
● The needle hits presser foot due to an
installation of incorrect presser foot.
● The needle fell into the hook area and
tried to start.
● Use the appropriate presser foot
to the selected stitch pattern.
● Remove the needle from the hook
area.
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● Needle breaks. ● Thick material is sewn with a thin needle.
● The needle is not inserted fully.
● The needle setscrew is not securely
tightened.
● The wrong presser foot is used for a
certain pattern.
● Check the combination of fabric,
thread and needle.
● Check the installation of needle.
● Securely tighten the needle
setscrew.
● Check the combination of stitch
pattern and presser foot to be used.
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● Loud noise and/or keen
noise while sewing
● Lint or dust has accumulated in the
feed dog.
● Lint or dust has accumulated in the hook.
● Clean the feed dog area.
● Clean the hook area.
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● Machine fails to feed
fabrics.
● The stitch length is set at “0”.
● Soft fabrics such as towels are being
sewn.
● The machine is set in drop feed
condition. (the drop feed knob is on the
right side)
● When the stitch pattern is
reselected, the machine goes back
to the default setting.
● Set the stitch length to 3 - 5.
● Set the drop feed knob to left side.
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● Needle can not be
threaded. (This is in case
needle threader will not
turn.)
● The hook of needle
threader does not go
through the needle eye.
● The needle is not in the up position.
(When needle is not in the up position,
needle threader will not turn.
This is to avoid damages to the hook.)
● The needle is not inserted fully.
● Rotate the hand wheel and lift the
needle upwards.
● Check the installation of the needle.
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Performance check list
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Case Cause (Reason) Solution
Refer-
ence
page
● The needle threading lever
will not return to the original
position and the machine
can not turn properly.
(This is in case the hook of
needle threader remains in
the needles eye.)
● Hand wheel is turned by mistake while
the needle threading lever is in down
position. (in the process of threading to
the needle.)
● Turn hand wheel slightly away from
you. (to the opposite side when
sewing).
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● The machine will not start
even when start/stop button
is pressed.
● The foot controller is plugged in. ● Start/stop button can function when
foot controller is removed.
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● Thread breaks.
● Stitch is skipped. ● The machine is incorrectly threaded.
● There is knot or knurl on the thread.
● The setting of manual thread tension is
incorrect.
● The needle is bent or the tip of needle
is broken.
● The needle is installed incorrectly.
● Threading of bobbin thread is not
correct.
● The bobbin can not turn smoothly
inside the hook holder.
● The needle size does not match the
thread.
● Thread take-up is not threaded.
● Rethread the machine correctly.
● Remove knot or knurl from thread.
● Adjust thread tension manually
according to fabrics and thread to
be used.
● Change needle.
● Install needle correctly.
● Check the correct way of setting
bobbin thread.
● Check the correct way of winding
bobbin thread.
● Check the combination of thread
and needle.
● Rethread the machine correctly.
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● Thread tension is not good. ● The needle thread is threaded in
correctly.
● The bobbin thread is threaded
incorrectly.
● The direction of spool cap doesn’t
match the spool.
● Rethread the machine correctly.
● Check the correct way of setting
bobbin thread.
● Attach the spool cap in a correct
direction.
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● Puckering occurs. ● The stitch length is too large on
light-weight fabrics.
● The needle tip is broken.
● Make the stitch length smaller
(shorter).
● Change needle.
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● sign is shown on the
LCD display.
● Safety mechanism works when
machine stops due to motor lock.
● The safety mechanism will be reset
in a short while (about 10 minute)
and the machine will return to
normal. (At this time, the start/stop
button will not light up.)
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