JUKI LH-4500C Series Instruction Manual page 91

Error
Description of error
code
E955 Electric current sensor
error
E961 Pitch motor deviation
error
E962 Presser motor deviation
error
E963 IPM temperature error
E965 Pitch motor temperature
error
E971 Pitch motor IPM overcur-
rent protection
E972 Pitch motor overload
E975 Presser motor IPM
over-current protection
E976 Presser motor overload
E977 CPU fault
E978 Network communication
fault
E985 Pitch motor return-to-ori-
gin error
E986 Both needles reset error
E987 Needle bar position sen-
sor detection error
E999 Main software rewriting
Cause
・ Main motor shaft failure.
・ Electric current sensor failure.
・ In the case the pitch motor fails to
operate because of an excessive
load.
・ In the case the presser fails to
operate because of an excessive
load.
・ In the case the temperature of the
CTL PCB is excessively high.
・ In the case the pitch motor is ap-
plied with an excessive load.
・ Pitch motor maloperation.
・ In the case the pitch motor is ap-
plied with an excessive load.
・ Presser motor maloperation.
・ In the case the presser motor is
applied with an excessive load.
・ In the case of a program fault.
・ In the case the data received from
the network is damaged.
・ In the case the pitch motor has
failed to return to its origin.
・ Both needles have not been reset
・ Both needles position could not be
detected.
・ In the case of rewriting the main
software.
– 86 –
Item to be checked
・ Check whether the main shaft motor has
short-circuited.
・ Check whether the pitch motor runs
smoothly.
・ Check whether the presser motor runs
smoothly.
・ Check whether the pitch motor runs
smoothly.
・ Check whether the pitch motor runs
smoothly.
・ Check whether the presser motor runs
smoothly.
・ Check whether the origin of the pitch motor
has been adjusted properly.
・ Whether the solenoid operates smoothly
without hitches.
・ Check the detection sensor.
・ It is not an error.