Omron MX2 Series User Manual

10 Troubleshooting
10 - 5
Multi-function Compact Inverter 3G3MX2-EV2 User’s Manual (I666-E1)
Name
Description
Alarm
code
Check and remedy
Reference
page
Overvoltage
protection
Extremely high DC voltage between
P/+2 and N/− may result in a fault.
E07.
Is there any rapid deceleration?
• Increase the deceleration time.
Is there any ground fault?
• Check the output wiring and
the motor.
Is the motor rotated from the load
side?
• Decrease the amount of
regeneration.
Is the incoming voltage too high?
• Lower the incoming voltage,
suppress the power supply
fluctuation, install the AC reac-
tor in the input power circuit.
Therefore, the inverter trips if the DC
voltage between P/+2 and N/−
exceeds approximately 400 VDC (for
200-V class) or 800 VDC (for 400-V
class) due to regenerative energy
from the motor or an increase in the
incoming voltage.
P. 2-34
P. 5-32
P. 5-62
P. 5-64
P. 7-42
EEPROM
error
*1
The inverter trips if an error occurs in
the built-in EEPROM due to external
noise or abnormal temperature rise.
(This may result in a CPU error.)
E08.
Is there any large noise source
around?
• Take measures against noise.
Is the cooling efficiency reduced?
• Check the cooling fin for
clogging and clean it.
−
Undervoltage
The inverter shuts off its output if the
incoming voltage drops below the
specified level, because the control
circuit fails to work properly at such a
low incoming voltage. Then, the
inverter trips if the DC voltage
between P/+2 and N/− exceeds drops
to approximately 173 VDC (for 200-V
class) or 345 VDC (for 400-V class) or
lower.
E09.
Is the power supply voltage
decreased?
• Check the power supply.
Is the power supply capacity suffi-
cient?
• Check the power supply.
Is there any smooth capacitor
that has deteriorated over time?
• A-2 Smoothing Capacitor Life
Curve on page A-7
P. 7-69
Current
detector error
The inverter trips if an error occurs in
the current detector.
E10.
The inverter has a defect.
• Repair it.
−
CPU error
*2
The inverter trips if a malfunction or
error occurs in the built-in CPU.
E11.
Is there any large noise source
around?
• Take measures against noise.
The inverter has a defect.
• Repair it.
−
External trip
The inverter trips if the multi-function
input terminal allocated to the Exter-
nal trip (12: EXT) function turns ON.
E12.
The external equipment has a
defect.
• Check the external equipment.
Is there any large noise source
around?
• Take measures against noise.
P. 7-81
*1. If this error occurs, the inverter will not accept the reset operation via the terminal RS or the STOP/RESET key.
Turn off the power supply once. If this error is still displayed at the next power-on, it is possible that the memory
is corrupt or the parameters are not stored correctly. Perform parameter initialization to reset the parameter
settings.
*2. If this error is still displayed at the next power-on, it is possible that the memory is corrupt or the parameters
are not stored correctly. Perform parameter initialization to reset the parameter settings.
10
10-1 Alarm Display and Reme-
dies
10-1-2 Alarm Code List

Omron MX2 Series Specifications

General

Cooling Method	Fan cooling
Output Frequency Range	0.1 to 400 Hz
Control Method	V/f control, Sensorless vector control
Protection Functions	Overcurrent, overvoltage, undervoltage, overload, overheating, short circuit
Communication Options	Modbus RTU
Overload Capacity	150% for 60 seconds
Braking Unit	Built-in
Ambient Operating Temperature	-10°C to +50°C
Enclosure	IP20
Storage Temperature	-20°C to +65°C
Humidity	5 to 95% RH (non-condensing)
Altitude	Up to 1000m
Power Supply Voltage	200-240V AC
Input Voltage	3-phase 200-240V AC