7-2
7-1 Error Display and Remedial Actions
SYSDRIVE MX2 Series USER'S MANUAL (3G3MX2-Axxxx)
   7
Maintenance Operations
Error Code List
Name Description
Error 
code
Check point and remedy
Reference 
page
Overcurrent 
protection
If the motor is restrained or 
rapidly accelerated or 
decelerated, a large current 
will flow through the Inverter, 
which will result in breakage. 
Accordingly, the protection 
circuit operates at 
approximately 200% of the 
Inverter rated output current 
and a trip occurs.
Constant 
speed
E01. 
Is there any rapid load 
fluctuation?
→
Eliminate load fluctuation.
Is there any output short-circuit?
→
Check the output wiring.
Is there any ground fault?
→Check the output 
wiring and motor.
−
During 
deceleration
E02. 
Is there any rapid deceleration?
→Increase the 
deceleration time.
5-24
5-66
Acceleration
E03. 
Is there any rapid acceleration?
→Increase the 
acceleration time.
Has the motor been locked?
→Check the motor and 
wiring.
Is the torque boost too high?
→
Lower the torque boost.
Others E04. 
Is the DC injection braking 
too high?
→
Decrease the braking force.
5-135
Overload 
protection
*1
The Inverter output current is monitored 
and if a motor overload is detected by 
the built-in electronic thermal, a trip 
occurs.
E05. 
Is the load too large?
→Decrease the load rate.
Is the thermal level correct?
→Adjust the thermal level 
to an appropriate level.
5-110
Braking 
resistor 
overload 
protection
A trip will occur if the usage rate of 
regenerative braking circuit exceeds 
the b090 set value.
E06. 
Is there any rapid deceleration?
→Increase the 
deceleration time.
Is the operation cycle too short?
→Increase the operation 
cycle.
5-24
5-141
Overvoltage 
protection
Extremely high DC voltage between P/
+2 and N/− may result in 
failure.Accordingly, a trip will occur if 
the DC voltage between P/+2 and N/− 
reaches approx. 400 VDC (200V class) 
or 800 VDC (400V class) or above due 
to increase in the regenerative energy 
from the motor or in the incoming 
voltage.
E07. 
Is there any rapid deceleration?
→Increase the 
deceleration time.
Is there any ground fault?
→Check the output 
wiring and motor.
Has the motor been rotated 
from the load side?
→Reduce regenerative 
energy.
Has incoming voltage 
increased?
→
Lower the incoming 
voltage, sustain the power 
supply fluctuation, apply 
the AC reactor to input.
−
*1. The reset command will not be accepted until approximately 10 seconds pass since the trip occurs
(protection function works).