Error Display List - JUKI LBH-1702 Manual

9. ERROR DISPLAY LIST

Error No. is displayed in the display when an error has occurred.
No.
Er1 Servo motor error
• When error is output from servo motor circuit board.
LED on servo motor circuit board flashes on and off when an
error has occurred.
Contents of error will be found in accordance with the number
of times of flashing.
1 : Motor-lock
2 : Defective upper dead point sensor
3 : Detection of defective phase of motor encoder
4 : Defective motor position sensor
5 : Motor drive element error
6 : Detection of low voltage of power voltage
7 : Detection of motor control current limiting value
8 : Detection of high voltage of power voltage
9 : False rotating direction of motor
10 : Input of motor control method
How to count flashing : Count a long flashing as 1 (one) and
continue to count the number of times of short flashings.
Er2 Presser lifting motion error
• When presser lowering detection switch signal does not change
after 2 (two) seconds has passed from presser lifting motion.
• When presser lowering detection switch is OFF before turning
ON the power.
Er3 Cloth cutting knife return error
• When cloth cutting knife does not return within 500 ms after
turning OFF cloth cutting knife solenoid or cylinder.
Er9 Safety switch error
• When depressing pedal in the state that safety switch is OFF.
Temporary stop error
Er10
• When temporary switch is turned ON.
• For treadle type 2-pedal system, start switch is turned OFF during
rotation.
Er11 Speed detection error
• When speed detection function is defective.
Er12 Needle UP error
• When needle bar is not in its upper position during stopping.
Description
− 74 −
How to recover/supposed cause
Turn OFF the power.
Turn OFF the power./
Defective sensor
Improper adjustment (Re-adjust the
item on page 38.)
Turn OFF the power./
Defective sensor
Improper adjustment
Turn OFF the power./
Sewing machine is in the state of
being tilted.
Defective sensor
Improper adjustment
Press reset key, or temporary stop
switch again.
Possible to re-start after pressing
reset key/defective connection with
servo circuit board
Detection of UP position by manually
rotating main shaft/defective sensor