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Monitoring Trip Events, History, & Conditions
Troubleshooting
and Maintenance
6–6
E06
Braking resistor overload When the regenerative braking resistor exceeds
the usage time allowance or usage ratio, the
inverter trips and turns OFF its output to the
motor.
E07
Over voltage protection When the DC bus voltage exceeds a threshold, due
to regenerative energy from the motor.
E08
EEPROM error When the built-in EEPROM memory has
problems due to noise or excessive temperature,
the inverter trips and turns OFF its output to the
motor.
E09
Under-voltage error A decrease of internal DC bus voltage below a
threshold results in a control circuit fault. This
condition can also generate excessive motor heat
or cause low torque. The inverter trips and turns
OFF its output.
E10
CT (current transformer)
error
If a strong source of electrical interference is close
to the inverter or a fault occurs in a built-in CT
(current transformer), the inverter trips and turns
its output OFF.
E11
CPU error A malfunction in the built-in CPU has occurred,
so the inverter trips and turns OFF its output to the
motor.
E12
External trip A signal on an intelligent input terminal config-
ured as EXT has occurred. The inverter trips and
turns OFF the output to the motor.
E13
USP When the Unattended Start Protection (USP) is
enabled, an error occurred when power is applied
while a Run signal is present. The inverter trips
and does not go into Run Mode until the error is
cleared.
E14
Ground fault The inverter is protected by the detection of
ground faults between the inverter output and the
motor during powerup tests. This feature protects
the inverter, and does not protect humans.
E15
Input over-voltage When the input voltage is higher than the specified
value, it is detected 60 seconds after powerup and
the inverter trips and turns OFF its output.
E16
Instantaneous power failure When the input power is removed for more than
15ms, the inverter trips and the output to the motor
turns OFF. If the power failure duration exceeds
the duration set in parameter B002, it is consid-
ered a power failure. When input power is
restored, the inverter restarts if the Run signal is
present, depending on the restart condition.
E21
Inverter thermal trip When the inverter internal temperature is above
the threshold, the thermal sensor in the inverter
module detects the excessive temperature of the
power devices and trips, turning the inverter
output OFF.
E23
Gate array error An internal inverter error has occurred in commu-
nications between the CPU and gate array IC.
Error
Code
Name Probable Cause(s)