Omron RX Series - Alarm Code List

10 - 3
10 Troubleshooting
High-function General-purpose Inverter 3G3RX-V1 User’s Manual (I578-E1)
10-1 Alarm Codes and
Remedies
10
10-1-2 Alarm Code List
Precautions for Correct UsePrecautions for Correct Use
The status information displayed on the inverter in the event of an alarm may not match the
apparent operation of the motor.
For example, under PID control or in applications where the frequency is input via the analog
signal, the inverter may accelerate and decelerate slightly in a repetitive manner due to
fluctuation of the analog signal etc. even though the motor may appear to rotate at a constant
speed.
The inverter in a trip state can be reset in either of the following two methods.
• Press the STOP/RESET key on the Digital Operator or LCD Digital Operator.
This key can be used to reset a trip error when the STOP Key Selection (b087) is set to 00 (Enabled)
or 02 (Only resetting enabled).
• Input the reset signal via the control circuit terminal block.
Set one of the Multi-function Input S1 to S8 Selection (C001 to C008) to 18 (RS: Reset).
The above reset methods may not be effective depending on the trip factor.
In such cases, cycle the power supply.
How to Reset a Trip State
10-1-2 Alarm Code List
Name Description
Alarm
code on
Digital
Operator
Check and remedy
Overcurrent
protection
If the motor is restrained or
rapidly accelerated or
decelerated, a large current
will flow through the inverter,
which will result in a fault.
Therefore, if the current
exceeding the specified level
flows, the inverter shuts off
its output and displays an
alarm.
This protection function
detects an overcurrent
through the AC current
detector (CT: current
transformer).
The protection circuit is
activated at approximately
220% of the inverter rated
output current, causing a trip.
During
constant
speed
E01.
Is there any rapid load fluctuation?
(Eliminate load fluctuation.)
Is there any output short-circuit? (Check
the output wires.)
Is there any ground fault? (Check the
output wires and the motor.)
During
deceleration
E02.
Is there any rapid deceleration?
(Increase the deceleration time.)
During
acceleration
E03.
Is there any rapid acceleration?
(Increase the acceleration time.)
Is the motor locked?
(Check the motor and wires.)
Is the torque boost too high?
(Decrease the torque boost setting.)
Others E04.
Is the DC injection braking power too
high?
(Decrease the braking power level.)
Is there any CT fault? (Replace or repair
the CT.)