User Manual of A90 Series Inverter
255
Chapter 9 Fault/Warning Solutions
9.1 Fault content
When the inverter is in the abnormal status, the digital tube display will show the
corresponding fault code and its parameters, the fault relay and fault output terminal will
work, and the inverter will stop the output. When a fault occurs, the motor will stop running
normally or slow down until it is stopped. The fault contents and solutions of the A90 series
inverter are shown in Table 0-1.
Table 0-1 Fault Contents and Solutions of A90 Series Inverter
Fault code
Fault type
Cause
Solution
E01
Short circuit
fault/EMC fault
1.
Short circuit to the ground.
2.
Inter-phase short circuit
3.
Short circuit of the external
braking resistor.
4.
The acceleration and
deceleration time is too
short.
5.
The inverter module is
damaged.
6.
There is excessive on-site
interference.
1.
Check the wiring for short
circuits.
2.
Properly increase the
acceleration and deceleration
time.
3.
Investigate the cause and
reset the controller after
implementing the
corresponding solutions.
4.
Seek technical support.
E02
Instantaneous
overcurrent
1.
The acceleration and
deceleration time is too
short.
2.
In the V/F drive mode, the
V/F curve setting is
unreasonable.
3.
The motor is running during
startup.
4.
The motor used is beyond
the capacity of the inverter
or the load is too heavy.
5.
Motor parameters are not
suitable and need to be
identified.
6.
The phases on the output
side of the inverter are
short-circuited.
7.
The inverter is damaged.
1.
Increase the acceleration and
deceleration time.
2.
Reasonably set the V/F
curve.
3.
Enable speed tracking or
start DC braking.
4.
Use the appropriate motor or
inverter.
5.
Identify the motor
parameters.
6.
Check the wiring for short
circuits.
7.
Seek technical support.
