JUKI LK-1900AN Engineer's Manual page 127

Trouble
21. Error E913
Needle thread clamp origin retrieval er-
ror
22. Error E914
Feed error
Cause (1)
21-1) Irregular motor rota- 1-A) There are irregularities in the
tions
1-B) Motor leads are broken.
1-C) The driver circuit has no
21-2) No sensor signal entry 2-A) The sensor is out of order or
Use of Test Mode
CP-1 or CP-2
2-B) The INT board connector is
2-C) Sensor mounting position is
22-1) Main shaft motor fail- 1-A) There are irregularities in the
ing in normal rotations
1-B) The main shaft motor is out of
1-C) The SDC board is out of or-
Cause (2)
mechanism, such as over-
loading, etc.
The motor is out of order.
power supply. (24V)
broken.
disconnected.
inadequate.
mechanism, such as over-
loading, etc.
order.
der.
Check and corrective measures
Check the mechanism and look for the sec-
tion that is particularly overloaded or whether
screws are loose.
Disconnect CN45 (yellow) of the MAIN board
and check the motor resistance. [See the Mo-
tor / Solenoid Circuit Diagram.] Replace the
motor.
Check F3 of the SDC board. After confirm-
ing the presence of short-circuiting in the 24V
system, replace the fuse.
Check whether the sensor lamp is turned ON/
OFF when a metallic plate is moved closer
to or separated from the sensor plane. In the
case of no lamp ON/OFF, the sensor is bro-
ken or the connector block is disconnected.
Check the connection of CN65 (yellow) of the
INT board.
Check and correct the sensor mounting posi-
tion.
Check the mechanism and look for the sec-
tion that is particularly overloaded or whether
screws are loose.
Disconnect CN16 of the SDC board and
check the resistance among pins. [See the
Servo Motor Circuit Diagram.]
Replace the SDC board.