– 117 –
Error
code
Description of error Cause Item to be checked
E811 Over-voltage • In the case a voltage that is equal to or
more than the guaranteed voltage is
input.
• In the case a voltage of 200 V is applied
though the voltage is set to 100 V.
• In the case a voltage of 220 V is input to
the box of "JA: 120 V".
• In the case a voltage of 400 V is applied
to the box of "CE: 230 V".
• Check whether the supply voltage of
"rated supply voltage ±10 % or more"
is applied.
In the case the supply voltage exceeds
the aforementioned "rating ±10 %" or
more, the power PCB may have bro-
ken.
E813 Low voltage
E815 Regenerative resistor is
not connected
• In the case the regenerative resistor is
not connected.
• Check whether the regenerative
resister is connected to the regenera-
tive resistor connector (CN11).
E900 Main shaft motor IPM
overcurrent protection
• Maloperation of the main shaft motor.
E901 Main shaft motor IPM
overload
E903 85-V power supply fault • In the case the 85-V voltage is not prop-
erly output.
• Check whether the stepping motor is
faulty.
• Check whether or not the solenoid
valve is defective.
• Check the F2 fuse.
E904 24-V power supply fault • In the case the 24-V voltage is not prop-
erly output.
• Check whether or not the cooling fan
is defective.
• Check the F1 fuse.
E910 The presser motor origin
retrieval error
• In the case the presser motor has failed
to return to its origin.
• Check whether the presser setting is
correct (memory switch No. 23).
• Check whether the presser motor
origin has been correctly adjusted.
E912 Main shaft motor speed
detection error
E915 Operation panel commu-
nication error
• In the case communication with the
operation panel cannot be carried out.
E916 MAIN-SUB communica-
tion error
• In the case communication between the
MAIN PCB and the SUB PCB cannot be
carried out.
E918 Main shaft temperature
error
• In the case the temperature of the CTL
PCB is excessively high.
E922 Main shaft control failure • In the case the main shaft motor is out
of control.
E924 Motor driver fault • In the case the motor driver has broken.
E946 Machine-head EEPROM
write error
• In the case the machine head PCB is
not correctly connected.
• Check whether CN32 has loosened
or come o.
E955 Electric current sensor
error
• Main motor shaft failure.
• Electric current sensor failure.
• Check whether the main shaft motor
has short-circuited.
E961 Pitch motor deviation
error
• In the case the pitch motor fails to oper-
ate because of an excessive load.
• Check whether the pitch motor runs
smoothly.
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