JUKI LK-1900AN, Руководство инженера

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11 –
Trouble Cause (1) Cause (2) Check and corrective measures
14. Error E901
Main shaft motor IPM Error
LED3 on SDC board: Flashing 5 times
14-1) The main shaft mo-
tor driving IPM in the
SDC board generates
an error output
1-A) IPM heat generation is exces -
sive.
Check whether electric box cooling is effec -
tive. Look for clogging around air suction
holes and check the fan, etc.
1-B) The main shaft motor is out of
order.
Disconnect CN16 of the SDC board and
check the 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
Pulse motor source error
LED3 on SDC board: Flashing 11 times
15-1) No +85V power out -
put of the SDC board
available
1-A) Fuse F1 of the SDC board is
broken.
Check for the presence of short-circuiting in
the +85V system of the MAIN board. Elimi -
nate the cause and replace the fuse.
1-B) Fuse F4 of the SDC board is
broken.
Replace the SDC board.
15-2) There is a deviation
of more than ±15%
in the +85V source of
the SDC board.
2-A) The power circuit is out of
order.
Replace the SDC board.
16. Error E904
Solenoid power source error
LED3 on SDC board: Flashing 12 times
16-1) No +33V power out -
put of the SDC board
available
1-A) Fuse F2 of the SDC board is
broken.
Check for the presence of short-circuiting in
the +33V system of the MAIN board. Elimi -
nate the cause and replace the fuse.
1-B) Fuse F5 of the SDC board is
broken.
16-2) There is a deviation
of more than ±15%
in the +33V source of
the SDC board.
2-A) The power circuit is out of
order.
Replace the SDC board.