Omron EasySpeed 3G3JE, User Manual

Page: 90 / 133

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