Maeda MK0003, Service Manual, Page: 309 / 348

5-15
2.6 LIST OF ALARM CODES
Name Content
Alarm
code
Check content and
countermeasures
Reference
Overcurrent
protection If the motor is restrained or if it
is put under sudden
acceleration/deceleration,
large amount of current will
flow into the inverter, and may
cause damage. Therefore, the
protection circuit will activate at
approximately 200% of the
inverter rated output current,
and trips. During
constant
speed
operation E01.

Are there any sudden changes in
load?
• Decrease the amount of load
changes.
Are there any short-circuits?
• Check the output line.
Are there any ground faults?
• Check the output line and motor.
During
deceleration E02.  Are there any sudden deceleration?
• Make the deceleration time
longer.
During
acceleration E03.

Are there any sudden acceleration?
• Make the acceleration time
longer.
Are motor locks observed?
• Check the motor and wiring.
Is the torque boost high?
• Lower the torque boost.
• Is the setting and adjustments of
the motor correct when in PM
motor?
Other E04.  Is the DC control too high?
• Lower the damping force.
Overload
protection
*1
The output current of the inverter is being
monitored, and if the internal electric thermal
detects an overload of the motor, it will trip. If
the overload protection of the motor and
inverter is separated under the settings of the
motor electric thermal function selection (b910),
it will function as a motor overload protection. E05.

Is there excessive load?
• Lower the load factor.
Is the thermal level (b012/b212)
correct?
• Adjust so that it is correct.
Overload
protection of
the limiting
resistor Trips when the activity ratio of the regenerative
braking exceeds the activity ratio configured in
b090. E06.

Are there any sudden deceleration?
• Make the deceleration time
longer.
Is the run cycle too short?
• Make the run cycle longer.
Overcurrent
protection If the DC current between P/+2 and N/-
becomes too high, it may result in damage.
Therefore, the motor will trip if the DC current
between P/+2, N/- exceeds approximately DC
400V (200 V level)/800 V (400 V level) due to
the rising of regenerative energy or receiving
voltage. E07.

Are there any sudden deceleration?
• Make the deceleration time
longer.
Are there any ground faults?
• Check the output line and motor.
Is the motor being rotated from the
load side?
• Reduce the regenerative power.
Is the receiving voltage rising?
• Lower the receiving voltage, limit
the power supply variation, use
AC reactor for input.
EEPROM
error
*2
Trips when faults in the internal EEPROM occur
due to abnormal rising of external noise or
temperature. (May result in CPU errors in some
cases.) E08.  Is there any source of strong noise?
• Take measures for the noise.
Is the cooling efficiency dropping?
• Check the cooling fin for
clogging, and clean.
• Replace cooling fan.
*1: Reset operation will not be available until approximately 10 seconds elapses after the trip (after the protection function
activates).
*2: Reset operation with the RS port or the STOP/RESET key will not be available when errors occur. Turn the machine off once.
If an error occurs when powering on the next time, the memory is damaged, or the parameter has not been saved properly.
Initialize and reconfigure the parameter.