Omron MX2 Series User Manual page 521

Name
Overvoltage Extremely high DC voltage between
protection P/+2 and N/− may result in a fault.
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.
EEPROM The inverter trips if an error occurs in
the built-in EEPROM due to external
*1
error
noise or abnormal temperature rise.
(This may result in a CPU error.)
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.
Current The inverter trips if an error occurs in
detector error the current detector.
The inverter trips if a malfunction or
*1
CPU error
error occurs in the built-in CPU.
External trip The inverter trips if the multi-function
input terminal allocated to the Exter-
nal trip (12: EXT) function turns ON.
*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.
Multi-function Compact Inverter 3G3MX2-V1 User's Manual (I585-E1)
Description
E07.
E08.
E09.
E10.
E11.
E12.
10 Troubleshooting
Alarm
Check and remedy
code
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.
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.
• Replace the cooling fan.
Is the power supply voltage
decreased?
• Check the power supply.
Is the power supply capacity suffi-
cient?
• Check the power supply.
Is the thyristor in the inrush cur-
rent protection circuit broken?
• Check that the DC voltage
between P/+2 and N/−
decreases only at large out-
put current values.
The inverter has a defect.
• Repair it.
Is there any large noise source
around?
• Take measures against noise.
The inverter has a defect.
• Repair it.
The external equipment has a
defect.
• Check the external equipment.
Reference
page
10
P. 2-31
P. 5-33
P. 5-63
P. 5-65
P. 7-42
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P. 7-68
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P. 7-79
10 - 5