Omron EasySpeed 3G3JE User Manual page 90

Maintenance Operations
Fault Displays and Corrective Measures
■
Fault Fault name and
display meaning
e02
Overcurrent
The momentary over-
current (250% of rated
output current) was
exceeded.
The overload rated
current (150% of rated
output current for
1 min) was detected.
e03
Motor overload
The electronic thermal
relay actuated the
motor overload protec-
tive function.
e04
Overvoltage
The main circuit DC
voltage reached the
overvoltage detection
level (410 V DC min.)
during Inverter opera-
tion.
4-4
Probable cause
A short-circuit or ground fault has
occurred at the Inverter output.
A fault has occurred in the machine.
The motor capacity is too large for the
Inverter.
The Inverter capacity is insufficient.
The magnetic contactor on the output
side of the Inverter has been opened
and closed.
The acceleration/deceleration time is
too short.
The output circuit of the Inverter is
damaged.
The load is too large.
The load is too large.
The acceleration/deceleration time is
too short.
The value in P01 for rated motor cur-
rent is incorrect.
The Inverter is driving more than one
motor.
The deceleration time is too short.
The power supply voltage is too high.
There is excessive regenerative energy
due to overshooting at the time of
acceleration.
Chapter 4
Correction
Check and correct the motor
power cable.
Correct the machine fault.
Reduce the motor capacity to
the maximum permissible
motor capacity or less.
Increase the Inverter capacity.
Rearrange the sequence so
that the magnetic contactor
will not open or close while the
Inverter is outputting a
current.
Increase the acceleration/
deceleration time.
Replace the Inverter.
Reduce the load.
• Reduce the load.
• Increase the motor capacity.
Increase the acceleration/
deceleration time.
Check the motor nameplate
and set P01 to the rated cur-
rent.
Disable the motor overload
detection function and install a
thermal relay for each of the
motors. The motor overload
detection function is disabled
by setting P01 to 0.0.
Increase the deceleration
time.
Decrease the voltage to within
specifications.
Suppress the overshooting as
much as possible.