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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
Over-current event while at constant
speed
Over-current event during
deceleration
Over-current event during
acceleration
Over-current event during
other conditions
Overload protection
Braking resistor overload protection
Over-voltage protection
EEPROM error
Under-voltage error
Current detection error
CPU error
External trip
USP
Ground fault
Input over-voltage
Inverter thermal detection
system error
Inverter thermal trip
CPU communication error
Name
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.
When a motor overload is detected by the electronic
thermal function, the inverter trips and turns OFF its
output.
When the BRD operation rate exceeds
the setting of "b090", this protective
function shuts off the inverter output and
displays the error code.
When the DC bus voltage exceeds a threshold, due to
such causes as regenerative energy from the motor or rise
of power voltage, etc.
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 an error occurs in the internal current
detection system, the inverter will shut off its
output and display the error code.
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 configured 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 upon during
powerup tests. This feature protects the inverter, and does
not protect humans.
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.
When the thermal sensor in the inverter module is not
connected.
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.
When communication between two CPU fails, inverter
trips and displays the error code.
81
Cause(s)
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