– 56 –
E302
Fall detecton swtch falure
(When the safety swtch
works)
• 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.
• 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.
E303
Semcrcular plate sensor
error
• Semcrcular plate sensor sgnal cannot be
detected.
• Check whether the machne head corre-
sponds wth the machne type settng.
• Check whether the motor encoder connector
s dsconnected.
E33
Tape cutter devce sensors
are turned ON smultane-
ously
• Faulty operaton of the tape cutter devce.
• Check whether the tape cutter devce s con-
nected properly.
• Check whether the pneumatc pressure s
adequate.
E332
Tape cutter devce sensors
are turned OFF smultane-
ously
• Faulty assembly and adjustment of the
tape cutter devce.
• Check whether the tape cutter devce s
properly assembled.
• Check whether the pneumatc pressure s
adequate.
E499
Data fault
• The stored data have broken.
• Reset all data on the functon settng to the
default values referrng to "Intalzng the
functon settng data" n the Engneer's Man-
ual.
E704
Data fault
• The stored data have broken.
• Reset all data on the functon settng to the
default values referrng to "Intalzng the
functon settng data" n the Engneer's Man-
ual.
E730
Encoder falure
• When the motor sgnal s not properly n-
putted.
• 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.
E73
Motor hole sensor falure
E733
Inverse rotaton of motor
• 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.
• Connecton of the encoder of man shaft
motor s wrong.
• Connecton for the electrc power of man
shaft motor s wrong.
E799
Thread trmmng operaton
tme-out
• The thread trmmer control operaton s
not completed wthn the predetermned
tme perod.
• 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.
E808
Solenod short crcut
• Solenod power does not become normal
voltage.
• Check whether the machne head cord s
caught n the pulley cover or the lke.
E809
Holdng moton falure
• Solenod s not changed over to holdng
moton.
• Check whether the solenod s abnormally
heated. (CTL crcut board asm. Crcut s
broken.)
E80
Solenod current abnormal-
ty
• Solenod rare short-crcut.
• Solenod resstance.
No.
Description of error detected
cause of occurrence expected
Items to be checked