JUKI LK-1900B series Engineer's Manual

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WARNING :
When it is necessary to open the control box containing electrical parts, be sure to turn the power off and wait for ve minutes or more before opening the cover in
order to prevent accident leading to electrical shock. If the work is performed while the power is ON, never touch other than necessary parts.
Trouble Cause (1) Cause (2) Check and corrective measures
22. Error E915 appears. 22-1) Communication between the
MAIN and panel cannot be
performed.
1-A) Connection defective Check whether there is loose in CN34 of the MAIN board.
1-B) Control circuit is out of order. Replace the operation panel or MAIN board.
23. Error E918 appears. 23-1) Cooling of the MAIN board is
not possible.
1-A) Fan does not rotate. Check the status of connections or the adhesion of dust at
CN33 (fan) of the MAIN board.
1-B) Heat dissipation of the element
is not possible.
Make sure that all setscrews of the main board are tightened.
24. When the sewing machine is
stopped, error E396 appears.
24-1) It does not become to the state
that the shorter thread remain-
ing thread trimming cylinder
turns ON and the sensor turns
OFF before origin retrieval or
during shorter thread remain-
ing thread trimming.
1-A) An air is not supplied. Turn OFF the power switch and check an air pressure.
1-B) Cylinder sensor mounting posi-
tion is inadequate.
Make sure that the cylinder sensor LED lights up in the initial
state of power supply ON and LED goes out in the operating
position.
1-C) Cylinder malfunction Make sure that the cylinder can be driven. If the cylinder can
not be driven, remove its cause.
Make sure that there is any loosening or missing of pins on
CN46 of MAIN board.
25. When the sewing machine is
stopped, error E397 appears.
25-1) It does not become to the state
that the suction nozzle cylinder
turns ON and the sensor turns
OFF during shorter thread
remaining thread trimming.
1-A) Cylinder sensor mounting posi-
tion is inadequate.
Make sure that the cylinder sensor LED lights up in the initial
state of power supply ON and LED goes out in the operating
position.
1-B) Cylinder malfunction Make sure that the cylinder can be driven. If the cylinder can
not be driven, remove its cause.
Make sure that there is any loosening or missing of pins on
CN46 of MAIN board.

JUKI LK-1900B series Specifications

General

Brand	JUKI
Model	LK-1900B series
Category	Sewing Machine
Language	English