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No.
Description of error
detected
Cause of occurrence expected Items to be checked
E813 Low voltage • When voltage lower than guaranteed
one is inputted.
• 120V is applied to 220V box.
• Check whether the voltage is lower than the
rated voltage - (minus) 10% or less.
• Inner circuit is broken by the applied
overvoltage.
• Check whether fuse or regenerative resis-
tance is broken.
E922 Main shaft uncontrol-
lable
• In the case the main shaft cannot be
controlled.
E924 Motor driver 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.
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