typical GT1790A - Error Codes E904-E999

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78
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Error
code
Description
Reset method
Reset location
E904
Abnormality of solenoid power
When the solenoid power of the servo-control
PCB is out of the range of the specified
values.
Turn OFF the
power
E905
Abnormality of temperature of heat sink
for servo control PCB
When temperature of heat sink of servo
control PCB is 85˚C or more.
Turn OFF the
power
E906
Abnormality of temperature of
heat-dissipating metal plate of main circuit
board
In case of abnormal high temperature of
heat-dissipating metal plate of main circuit
board.
Turn OFF the
power
E907
Needle rocking motor origin retrieval error
When origin sensor signal is not input at the
time of origin retrieval motion.
Turn OFF the
power
E908
Y feed motor origin retrieval error
When origin sensor signal is not input at the
time of origin retrieval motion.
Turn OFF the
power
E909
Needle thread trimmer motor origin
retrieval error
When origin sensor signal is not input at the
time of origin retrieval motion.
Turn OFF the
power
E910
Presser motor origin retrieval error
When origin sensor signal is not input at the
time of origin retrieval motion.
Turn OFF the
power
E911
Bobbin thread trimmer motor origin
retrieval error
When origin sensor signal is not input at the
time of origin retrieval motion.
Turn OFF the
power
E912
—
Sewing motor speed detection error
When the sewing machine motor malfunctions
Turn OFF the
power
E915
Abnormality of communication between
operation panel and main CPU
When abnormality occurs in communication.
Turn OFF the
power
E916
Abnormality of communication between
main CPU and main shaft CPU
When abnormality occurs in communication.
Turn OFF the
power
E918
Abnormality of temperature of heat sink
for main control PCB
When temperature of heat sink of main control
PCB is 85°C or more.
Turn OFF the
power
E943
Defectiveness of EEP-ROM of main control
PCB
When data writing to EEP-ROM is not
performed.
Turn OFF the
power
E946
Defectiveness of writing to EEP-ROM of
head relay PCB
When data writing to EEP-ROM is not
performed.
Turn OFF the
power
E998
Presser deviation error
In the case the presser foot fails to go up when
the pedal is released or when the sewing is
finished. Turn the power OFF. Check whether
the work clamp can be lifted/lowered
manually. At this moment, do not touch the
needle or the knife.
Turn OFF the
power
E999
Cloth cutting knife does not return
 When cloth cutting knife does not return
after the lapse of predetermined time.

When sensor is not turned ON while
cloth cutting knife is raising (at the time
of waiting).
Turn OFF the
power