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Error Codes
An error code will appear on the display automatically when a fault causes the inverter to
trip. The following table lists the cause associated with the error.
Error
Code
Name
Cause(s)
Over-current event while at constant
speed
The inverter output was short-circuited, or the motor shaft
is locked or has a heavy load. These conditions cause
excessive current for the inverter, so the inverter output is
turned OFF.
Setting in dual-voltage motor is wrong.
Over-current event during
deceleration
Over-current event during
acceleration
Over-current event during
other conditions
Overload protection
When a motor overload is detected by the electronic
thermal function, the inverter trips and turns OFF its
output.
Braking resistor overload protection
When the BRD operation rate exceeds
the setting of "b090", this protective
function shuts off the inverter output and
displays the error code.
Over-voltage protection
When the DC bus voltage exceeds a threshold, due to
such causes as regenerative energy from the motor or rise
of power voltage, etc.
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.
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.
Current detection error
If an error occurs in the internal current
detection system, the inverter will shut off its
output and display the error code.
CPU error
A malfunction in the built-in CPU has occurred, so the
inverter trips and turns OFF its output to the motor.
External trip
A signal on an intelligent input terminal configured as EXT
has occurred. The inverter trips and turns OFF the output
to the motor.
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.
Ground fault
The inverter is protected by the detection of ground faults
between the inverter output and the motor upon during
powerup tests. This feature protects the inverter, and does
not protect humans.
Input over-voltage
The inverter tests for input over-voltage after the inverter
has been in Stop Mode for 100 seconds. If an
over-voltage condition exists, the inverter enters a fault
state. After the fault is cleared, the inverter can enter Run
Mode again.
Inverter thermal detection
system error
When the thermal sensor in the inverter module is not
connected.
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.
CPU communication error
When communication between two CPU fails, inverter
trips and displays the error code.
