• Code: SC77-55
• Description: After the punch shift motor (M5) starts the home position search, the punch shift home sensor (PS5) does not turn ON even when a specified period of time elapses.
• Causes: ZU control board (ZUCB) Punch shift motor (M5) Punch shift home sensor (PS5)

• Code: SC77-56
• Description: A specified period of time after the conveyance motor cooling fan (M10) is turned on, the EM signal of the M10 gets into an abnormal condition. Even after three trials with the M10 turned OFF, an abnormal condition still recurs.
• Causes: ZU control board (ZUCB) Conveyance motor cooling fan (M10)

• Code: SC77-57
• Description: After the punch motor (M4) turns on, the punch operation is not completed even when a specified period of time elapses. (The punch home sensor (PS6) does not turn OFF, or it does not turn ON after being turned OFF.)
• Causes: ZU control board (ZUCB) Punch motor (M4) Punch clutch (CL1) Punch home sensor (PS6)

• Code: SC77-58
• Description: After the punch switching motor (M8) starts the home position search, the punch switching switch (MS2) does not turn ON even when a specified period of time elapses.
• Causes: ZU control board (ZUCB) Punch switchover motor (M8) Punch switchover switch (MS2)

• Code: SC77-81
• Description: After the gate motor (M12) starts the home position search, the gate home sensor (PS16) does not turn ON even when a specified period of time elapses.
• Causes: FS control board (FSCB) Gate motor (M12) Gate home sensor (PS16)

• Code: SC77-91
• Description: Communication error when the sub CPU in the FS control board (FSCB) is receiving data.
• Causes: FS control board (FSCB)

• Code: SC77-92
• Description: Communication error when the main CPU in the FS control board (FSCB) is receiving data.
• Causes: FS control board (FSCB)

• Code: SC77-98
• Description: When the FS is started, an unwritten flash ROM is detected.
• Causes: FS control board (FSCB)