Hitachi SJ300 Series Instruction Manual page 230

6–6
Monitoring Trip Events, History, & Conditions
Error
Name
Code
Overload protection
E05
Braking resistor overload
E06
E07 Over voltage protection
EEPROM error
E08
E09 Under-voltage error
E10 CT (current transformer)
error
CPU error
E11
External trip
E12
USP
E13
E14 Ground fault
E15 Input over-voltage
E16 Instantaneous power failure
Inverter thermal trip
E21
Probable Cause(s)
When a motor overload is detected by the
electronic thermal function, the inverter trips and
turns OFF its output.
When the regenerative braking resistor exceeds
the usage time allowance or usage ratio, the
inverter trips and turns OFF its output to the
motor.
When the DC bus voltage exceeds a threshold, due
to regenerative energy from the motor.
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.
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.
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.
A malfunction in the built-in CPU has occurred,
so the inverter trips and turns OFF its output to the
motor.
A signal on an intelligent input terminal config-
ured as EXT has occurred. The inverter trips and
turns OFF the output to the motor.
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.
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.
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.
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.
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.