JUKI DDL-8700A-7 Instruction Manual page 59

No. Description of error detected
E302 Fall detecton swtch falure
(When the safety swtch
works)
E303 Semcrcular plate sensor
error
E33 Tape cutter devce sensors
are turned ON smultane-
ously
E332 Tape cutter devce sensors
are turned OFF smultane-
ously
E499 Data fault
E704 Data fault
E730 Encoder falure
E73 Motor hole sensor falure
E733
Inverse rotaton of motor
E799
Thread trmmng operaton
tme-out
E808 Solenod short crcut
E809 Holdng moton falure
E80 Solenod current abnormal-
ty
cause of occurrence expected
• When fall detecton swtch s nput n the
state that the power s turned ON.
• Thread trmmng knfe poston s not cor-
rect.
• Machne-head tlt detector's connector has
come off.
• Semcrcular plate sensor sgnal cannot be
detected.
• Faulty operaton of the tape cutter devce.
• Faulty assembly and adjustment of the
tape cutter devce.
• The stored data have broken.
• The stored data have broken.
• When the motor sgnal s not properly n-
putted.
• Ths error occurs when the motor s run-
nng at 500 st/mn or more n the opposte
drecton of that of rotaton ndcaton dur-
ng motor s runnng.
• The thread trmmer control operaton s
not completed wthn the predetermned
tme perod.
• Solenod power does not become normal
voltage.
• Solenod s not changed over to holdng
moton.
• Solenod rare short-crcut.
– 56 –
Items to be checked
• Check whether the machne head s tlted
wthout turnng OFF the power swtch (sew-
ng machne operaton s prohbted for safety
sake).
• Check whether the fall detecton swtch cord
s caught n the sewng machne or the lke.
• Check whether the fall detecton swtch lever
s caught n somethng.
• Check whether the contact of the tlt detec-
ton swtch lever wth the machne table s
nadequate. (The table has a dent or the
mountng locaton of the bed strut s too far.)
• Check the machne-head tlt detector's con-
nector (CN48) for looseness and slp-off.
• Check whether the machne head corre-
sponds wth the machne type settng.
• Check whether the motor encoder connector
s dsconnected.
• Check whether the tape cutter devce s con-
nected properly.
• Check whether the pneumatc pressure s
adequate.
• Check whether the tape cutter devce s
properly assembled.
• Check whether the pneumatc pressure s
adequate.
• Reset all data on the functon settng to the
default values referrng to "Intalzng the
functon settng data" n the Engneer's Man-
ual.
• Reset all data on the functon settng to the
default values referrng to "Intalzng the
functon settng data" n the Engneer's Man-
ual.
• Check the motor sgnal connector (CN30) for
loose connecton and dsconnecton.
• Check whether the motor sgnal cord has
broken snce the cord s caught n the ma-
chne head.
• Check whether the nsertng drecton of the
motor encoder connector s wrong.
• Connecton of the encoder of man shaft
motor s wrong.
• Connecton for the electrc power of man
shaft motor s wrong.
• Check whether the functon settng No. 95
(Head selecton functon) has been set cor-
rectly.
• Check whether the motor pulley dameter
agrees wth the settng.
• Check whether the belt has slackened.
• Check whether the machne head cord s
caught n the pulley cover or the lke.
• Check whether the solenod s abnormally
heated. (CTL crcut board asm. Crcut s
broken.)
• Solenod resstance.