JUKI LBH-1790S Instruction Manual page 86

Error code
E731 Main motor hole sensor defectiveness or position
sensor defectiveness
When hole sensor or position sensor of sewing machine
motor is defective.
E733 Reverse rotation of main shaft motor
When sewing machine motor rotates in reverse direction.
E801 Phase-lack of power
When phase-lack of input power occurs.
E802 Power instantaneous cut detection
When input power is instantaneously OFF.
E811 Overvoltage
In the case the input power source voltage/current is equal
to or more than the specified value
E813 Low voltage
In the case the input power source voltage/current is equal
to or less than the specified value
E820 24 VDC fuse has blown out
When the SDC fuse has blown out.
E901 Abnormality of main shaft motor IPM
When IPM of servo control p.c.b. is abnormal.
E902 Overcurrent of main shaft motor
When current flows excessively to sewing machine motor.
Abnormality of stepping motor power
E903
In the case the stepping motor power of the servo-control
PCB is out of the range of the specified values
E904 Abnormality of solenoid power
In the case the solenoid power of the servo-control PCB is
out of the range of the specified values
E905 Abnormality of temperature of heat sink for servo
control p.c.b.
When temperature of heat sink of servo control p.c.b. is
85˚C or more.
E907 Needle rocking motor origin retrieval error
When origin sensor signal is not inputted at the time of
origin retrieval motion.
E908 Y feed motor origin retrieval error
When origin sensor signal is not inputted at the time of
origin retrieval motion.
E909 Needle thread trimmer motor origin retrieval error
When origin sensor signal is not inputted at the time of
origin retrieval motion.
E910 Presser motor origin retrieval error
When origin sensor signal is not inputted at the time of
origin retrieval motion.
E911 Bobbin thread trimmer motor origin retrieval error
When origin sensor signal is not inputted at the time of
origin retrieval motion.
E912 Sewing motor speed detection error
-
In the case the sewing machine motor malfunctions
E915 Abnormality of communication between operation
panel and main CPU
When abnormality occurs in communication.
E916 Abnormality of communication between main CPU
and main shaft CPU
When abnormality occurs in communication.
Description
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How to recover Place of recovery
Turn OFF the
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power.
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power.
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power.
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power.
Turn OFF the
power.