Troubleshooting - Brother RH-9800 Instruction Manual

11. TROUBLESHOOTING

11. TROUBLESHOOTING
If there is a problem with operation, first check that the threads are correctly threaded and that the needle is correctly
installed.
Turn off the power switch and disconnect the power cord before carrying out troubleshooting, otherwise the
machine will operate if the start switch is pressed by mistake, which could result in injury.
MACHINE HEAD
Problem
Thread breaks.
Skipped stitches occur.
Needle breaks.
58
CAUTION
Cause
Thread tension control
pressure is too strong.
Thread is of poor quality.
Thread is too thick for the needle.
Needle groove or needle hole are
not smooth.
Needle and looper adjustment is
incorrect.
Needle, looper, throat plate or
thread path is damaged.
Thread tension control
pressure is too strong or too
weak.
Needle point is broken or bent.
Needle and looper adjustment is
incorrect, or clearance is incorrect.
Needle and needle
adjustment is incorrect.
Looper tip is blunt.
Needle is bent.
Needle and looper adjustment is
incorrect.
Needle and needle
adjustment is incorrect.
RH-9800
Remedy
nut
Adjust to an appropriate pressure.
Use a better-quality thread.
Use a differently-size needle.
Replace with a new needle.
Adjust the needle bar height or
the looper and spreader height.
Repair the damage with an
oilstone or buffer, or replace the
damaged part.
nut
Adjust to an appropriate pressure.
Replace with a new needle.
Adjust correctly.
guard
Adjust correctly.
Repair with an oilstone or replace
the looper with a new one.
Replace with a new needle.
Adjust the needle bar height or
the looper and spreader height.
guard
Adjust correctly.
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