Monitoring Trip Events, History, & Conditions
Troubleshooting
and Maintenance
6–6
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)
E01
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.
E02
Over current event during
deceleration
E03
Over current event during
acceleration
E04
Over current event while
motor is stopped
E05
Overload protection When a motor overload is detected by the electronic
thermal function, the inverter trips and turns off its
output.
E06
Braking resistor overload When the regenerative braking resistor exceeds the
usage time allowance or an over-voltage caused by the
stop of the BRD function is detected, 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 thresh-
old 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 abnormal operations occur in the built-
in CT (current transformer), the inverter trips and
turns its output off.
E11
E22
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 configured 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 cycled
while the inverter is in Run Mode. The inverter trips
and does not go into Run Mode until the error is
cleared.
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