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E811 Overvoltage • When voltage higher than guaranteed one
is inputted.
• 200V has been inputted to 100V specica-
tions.
• 220V is applied to 120V box.
• CE : 400V is applied to 230V box.
• Check whether the applied power voltage is
higher than the rated voltage + (plus) 10% or
more.
• Check whether 100V/200V changeover con-
nector is improperly set.
In the aforementioned cases, POWER p.c.b is
broken.
E813 Low voltage •
When voltage lower than guaranteed one
is inputted.
• 100V has been inputted to 200V specica-
tions.
• 120V is applied to 220V box.
• Inner circuit is broken by the applied over-
voltage.
• Check whether the voltage is lower than the
rated voltage - (minus) 10% or less.
• Check whether 100V/200V changeover con-
nector is improperly set.
• Check whether fuse or regenerative resis-
tance is broken.
E815 Regeneration resistor is not
connected
•
CN11: Not connected • Check whether the generation resister is
connected to CN11.
E906 Operat
ion panel transmis-
sion failure
• Disconnection of operation panel cord.
• Operation panel has broken.
• Check the operation panel connector (CN38)
for loose connection and disconnection.
• Check whether the operation panel cord has
broken since the cord is caught in the ma-
chine head.
E922 Ma
in shaft uncontrollable • In the case the main shaft cannot be con-
trolled.
• Turn the power OFF.
E924 Motor dr
iver failure • Motor driver has broken.
E930 Faulty encoder •
In the case a motor signal cannot be input
correctly.
• Check the motor signal connector (CN30) for
looseness and slip-off.
• Check whether the motor signal cord is
caught in the machine head or has a break.
E931 Motor hole sensor failure
E942 Faulty EEPROM •
Data cannot be written on the EEPROM. • Turn the power OFF.
No.
Description of error detected
Cause of occurrence expected Items to be checked
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