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Error Code Table - Brother LH4-B800E Service Manual

Electronic lockstitch button holer.
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6-7. ERROR CODE TABLE

Wait at least 5 minutes after turning off the power switch and disconnecting the power cord
from the wall outlet before opening the face plate of the control box. Touching areas where high
voltages are present can result in severe injury.
If a malfunction should occur with the sewing machine, a buzzer will sound and an error code will appear
in the display window.
Follow the remedy procedure to eliminate the cause of the problem.
For errors which do not require the power to be turned off (i.e. errors which can be reset), two short beeps
will sound. For error E-02, three short beeps will sound.
For errors which require the power to be turned off (i.e. errors which cannot be reset), a single long beep
will sound.
Code
E-00
EMERGENCY STOP switch was pressed.
E-01
Upper thread breakage
E-02
Needle up sensor is OFF.
E-05
Zigzag positioning is not carried out.
E-06
Feed positioning is not carried out.
E-07
Presser foot positioning is not carried out.
E-08
Cutter home position sensor is off.
E-20
Feed and presser foot motor overcurrent
E-21
Zigzag motor overcurrent
E-30
Threadle is depressed to step 2.
E-31
Threadle is depressed to step 1.
E-32
Threadle is depressed backward.
E-40
Control board heat sink is overheating.
E-41
Inside air circulation fan problem
E-42
Exhaust fan problem
E-44
2-step power supply circuit board +55V relay error
E-51
X pitch error
E-52
Y pitch error
E-54
Overall cycle program stitch no. error
E-55
Stitch no. error
DANGER
Cause
LH4-B800E
Remedy
To restart sewing: Press the parameter down key and
then depress the treadle to step 2.
To cancel sewing : Press the RESET key.
To restart sewing: Press the parameter down key and
then depress the treadle to step 2.
To cancel sewing : Press the RESET key.
Turn the machine pully by hand to raise the needle.
Turn off the power.
Turn off the power.
Turn off the power.
Turn off the power.
Turn off the power.
Turn off the power.
Return the treadle to the neutral position.
Return the treadle to the neutral position.
Return the treadle to the neutral position.
Turn off the power.
Turn off the power.
Turn off the power.
Turn off the power.
Turn off the power.
Turn off the power.
Exceeds 3,000 stitches.
Clear the cycle program and reset automatically.
Exceeds 700 stitches. Turn off the power.
6. ELECTRIC MECHANISM
6 - 27

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