Megmeet MV300 Series - Troubleshooting Common Issues; Displaying Exceptions and Solutions

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Chapter 7 Troubleshooting
7.1 Displaying exception and solutions
All possible fault types for MV300 are summarized as shown in table 7-1. The number of the fault code is 36.
Before consulting the service department, the user can perform self-check according to the hints of the table
and record the fault symptoms in detail. To seek for service support, please contact the sales person.
Table 7-1 Fault record table
Fault code Fault type Possible fault cause Solutions
Er.oC1
Acceleration
over-current of
the drive
The acceleration time is too short. Lengthen the acceleration time
The motor parameters are incorrect. Perform the parameter auto-tuning of the motor
When instantaneous stop happens,
restart the rotating motor
Set the start mode F08.00 as the speed tracking
restart function
The drive power is too low. Adopt the drive with high power class
V/F curve is improper.
Adjust the V/F curve setting and the manual torque
increase
Er.oC2
Deceleration
over-current of
the drive
The deceleration time is too short. Lengthen the deceleration time
There is potential energy load or the
load inertial torque is large.
Use additionally appropriate dynamic braking
components
The drive power is low. Adopt the drive with high power class
Er.oC3
Constant
speed
over-current of
the drive
The acceleration/deceleration time is too
short.
Lengthen the acceleration/deceleration time
appropriately
Sudden load change or abnormal load Check the load
Low grid voltage Check the input power supply
The drive power is low. Adopt the drive with high power class
Er.oU1
Acceleration
over-voltage of
the drive
Abnormal input voltage Check the input power supply
Acceleration time is too short. Lengthen the acceleration time appropriately
When instantaneous stop happens,
restart the rotating motor
Set the start mode P08.00 as the speed tracking
restart function
Er.oU2
Deceleration
over-voltage of
the drive
The deceleration time is too short
(compared with regeneration energy).
Lengthen the deceleration time
There is potential energy load or the
load inertial torque is large.
Select appropriate dynamic braking components