JUKI LK-1900A, Engineer'S Manual, Page: 110 / 124

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12. Error E811 12-1) Excessive AC input voltage 1-A) There are variations or Check the AC input power line.
Overvoltage error (More than 280V) unusual rise in the AC input
LED3 on SDC board: Flashing power line.
8 times
1-B) The detector circuit is out of order. Replace the SDC board.
13. Error E813 13-1) Insufficient AC input voltage 1-A) There are variations or unusual Check the AC input power line.
Low voltage error (Less than 160V) drop in the AC input power line.
LED3 on SDC board: Flashing
6 times
1-B) 100V is used despite the 200V Check the voltage setting (100V or 200V) in the
setting. (FLT board for 3-phase FLT board.
specifications)
1-C) The detector circuit is out of If everything is OK after the above checks, the SDC
order. board is out of order.
14. Error E901 14-1)The main shaft motor driving 1-A) IPM heat generation is Check whether electric box cooling is effective. Look
Main shaft motor IPM error IPM in the SDC board generates excessive. for clogging around air suction holes and check the
LED3 on SDC board: Flashing an error output fan, etc.
5 times
1-B) The main shaft motor is out Disconnect CN16 of the SDC board and check the
of order. resistance among pins. [See the Servo Motor Circuit
Diagram.]
1-C) The driver circuit is out of order. Replace the SDC board.
15. Error E903 15-1)No +85V power output of 1-A) Fuse F1 of the SDC board is Check for the presence of short-circuiting in the +85V
Pulse motor source error the SDC board available broken. system of the MAIN board. Eliminate the cause and
LED3 on SDC board: Flashing replace the fuse.
11 times
1-B) Fuse F4 of the SDC board is Replace the SDC board.
broken.
15-2)There is a deviation of more 2-A) The power circuit is out of order. Replace the SDC board.
than
±
15% in the +85V sou-
rce of the SDC board.
16. Error E904 16-1)No +33V power output of the 1-A) Fuse F2 of the SDC board is Check for the presence of short-circuiting in the +33V
Solenoid power source error SDC board available broken. system of the MAIN board. Eliminate the cause and
LED3 on SDC board: Flashing replace the fuse.
12 times
1-B) Fuse F5 of the SDC board is
broken.
16-2)There is a deviation of more 2-A) The power circuit is out of order. Replace the SDC board.
than
±
15% in the +33V sou-
rce of the SDC board.
Trouble Cause (1) Cause (2) Check and corrective measures