JUKI DU-1481 Series Instruction Manual page 30

Error code Meaning of the code
A Pulley stop position fault
Excessive maximum
B
sewing speed
Synchronizer self-check
C
fault
D EEPROM error
EEPROM parameter
E
fault
Motor encode signal
F
fault
If any failure has been detected, turn OFF the power to the system first. hen, check the ground wire of
the control system.
Wait for 30 seconds. Then, re-turn ON the power to the system to check whether or not the system op-
erates normally.
If the failure has not been corrected, repeat the aforementioned procedure several times. If the failure
still continues, contact your distributor.
Possible problem that has occurred
1. Parameter setting for the MPD or
SPD is not correct.
2. Overload
3. Encoder signal fault
4. Unstable synchronizer signal
5. Motor failure, or drive power
shortage
1. Sewing speed has exceeded the
maximum sewing in the same
direction
2. Sewing speed has exceeded 300
r/min in the reverse direction
3. Encoder signal fault
4. Motor failure (degauss, etc.)
Synchronizer is not installed
EEPROM which stores parameters
has a problem.
Parameters in the EEPROM are not
correct.
In the case "F" alarm continues, the
encoder in the motor has failed.
– 28 –
Corrective measure
Turn OFF the power and check
whether or not the sewing ma-
chine motor is normal.
1. Check the connection of drive
line U / V/ W between the
power box and motor
2. Ground the system
1. Turn the power OFF. Re-install
the synchronizer. Re-turn the
power ON.
2. Change the synchronizer with
a new one.
Change the EEPROM with a new
one.
Re-start the sewing machine
Check the motor signal line for
disconnection and poor contact.