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12 Troubleshooting
High-function General-purpose Inverter RX2 Series User’s Manual
12-2 Error No. and Its Measure
12
12-2-2 Details about Errors
At the time of an instantaneous overcurrent or the main element failure, the inverter turns OFF its out-
put to protect the main element.
Overcurrent error may be issued instead.
When the output phase loss selection [bb-66] is set to 01, when a loose connection or disconnection of
output line, disconnection inside the motor, etc. is detected, the inverter turns OFF its output. Detection
of phase loss state is executed in the section between 5 Hz to 100 Hz.
E030 IGBT Error
Occurrence Estimated cause(s) Exemplar measures to be taken
Error occurred right
after the operation
started.
• A ground fault has
occurred.
• Output line is short-cir-
cuited.
After the power is turned OFF, you need to check the wires
connected to the motor, motor disconnection, and the like. If
the error occurs after removal of the motor wires, the inverter
is broken down. It needs to be repaired.
Motor rotation is locked.
A large current may flow when the motor rotation is locked
during operation. The cause needs to be removed.
Output element is broken
down.
If output element is broken down, it needs to be repaired.
Error occurred right
after power was
turned ON.
Output element is broken
down.
If output element is broken down, it needs to be repaired.
Error occurred
during operation.
Motor rotation is locked.
A large current may flow when the motor rotation is locked
during operation. The cause needs to be removed.
E034 Output Open-phase Error
Occurrence Estimated cause(s) Exemplar measures to be taken
Error occurred right
after the operation
started.
An output line or the
motor has a loose con-
nection or is discon-
nected.
You need to turn OFF the power supply and check the output
lines and the wiring condition of motor. This error can also
occur due to motor insulation breakdown or screw tightening
failure.
Single-phase output is
used.
For output lines, use three-phase connection.
Error occurred after
long hours of opera-
tion.
An output line or the
motor has a loose con-
nection or is discon-
nected.
You need to turn OFF the power supply and check the output
lines and the wiring condition of motor. If there is a loosened
screw, the situation may be improved by re-tightening the
screw.
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