Omron RX Series User Manual page 580

10 Troubleshooting
Name
The inverter shuts off its output if a
momentary power interruption occurs for 15
ms or more.
Momentary
If the shutoff time is long, it is normally
power
recognized as a power shutoff. Note that,
interruption
when the power interruption restart function
protection
is enabled, the inverter restarts after power
recovery if the RUN command input
remains.
Temperature
This alarm appears if a decrease of the
error due to
cooling fan rotation speed is detected when
cooling fin
a temperature error occurs.
speed drop
The inverter shuts off its output if the
Temperature
temperature rises in the main circuit due to
error
such as a high ambient temperature.
*1. If this occurs, the inverter will not accept the reset operation via the terminal RS or the STOP/RESET key. Turn
off the power supply once.
*2. If the inverter reads an abnormal value from the EEPROM, a CPU error may occur.
*3. If this occurs, the inverter will not accept the reset operation via the Digital Operator. Be sure to reset it via the
terminal RS.
*4. Refer to Section 11 Maintenance and Inspection.
Name
Gate array
communications
error
Input phase
loss protection
Main circuit
*1
error
10 - 6
Description
Description
The inverter trips when a fault is
detected in communications between
the built-in CPU and the gate array.
This causes the inverter to trip to
prevent inverter damage due to input
phase loss when the Input Phase
Loss Protection Selection (b006) is
set to 01 (Enabled).
The inverter trips when the phase
loss time is approximately 1 second
or more.
The inverter trips if the gate array
cannot confirm whether the IGBT is
ON or OFF due to a malfunction by
noise in the signal, load short-circuit,
or broken main element, etc.
High-function General-purpose Inverter 3G3RX-V1 User's Manual (I578-E1)
Alarm
code on
Check and remedy
Digital
Operator
Is the power supply voltage decreased?
(Restore the power supply.)
E16.
Is there a contact failure on the MCCB
and/or MC?
(Replace the MCCB and/or MC.)
Is the cooling efficiency reduced?
(Replace the cooling fan.)
E20.
Is there any clogging in the fin?
(Clean the fin.)
Did you install the inverter vertically?
(Check the installation.)
E21.
Is the ambient temperature high?
(Decrease the ambient temperature.)
Alarm
code on
Check and remedy
Digital
Operator
Is there any large noise source around?
(Take measures against noise.)
E23.
Is the cable disconnected?
(Check the connector.)
Is there any input power supply phase loss?
(Check the input wiring.)
E24.
Is there a contact failure on the MCB and/or
Mg?
(Replace the MCB and/or Mg.)
Is there any large noise source around?
(Take measures against noise.)
Is the main element damaged?
E25.
Is there any output short-circuit?
(Check the Servo Drive.)
The inverter has a defect. (Repair it.)