6−9
Error
Code
Name Cause(s)
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
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 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
upon during powerup tests. This feature protects
the inverter, and does not protect humans.
E15
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.
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.
E22
CPU communication error When communication between two CPU fails,
inverter trips and displays the error code.
E25
Main circuit
error (*3)
The inverter will trip if the power supply
establishment is not recognized because of a
malfunction due to noise or damage to the main
circuit element.
E30
Driver error An internal inverter error has occurred at the
safety protection circuit between the CPU and
main driver unit. Excessive electrical noise may be
the cause. The inverter has turned OFF the IGBT
module output.
E35
Thermistor When a thermistor is connected to terminals [5]
and [L] and the inverter has sensed the
temperature is too high, the inverter trips and
turns OFF the output.
E36
Braking error When "01" has been specified for the Brake Control
Enable (b120), the inverter will trip if it cannot
receive the braking confirmation signal within the
Brake Wait Time for Confirmation (b124) after the
output of the brake release signal.
E37
Safe Stop Safe stop signal is given.
E38
Low-speed overload protection If overload occurs during the motor operation at a
very low speed, the inverter will detect the
overload and shut off the inverter output.
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