User Manual of EM730/EM730E Series Inverter
301
Chapter 9
Protection/Warning Solutions
9.1
Protection content
When the inverter is in the abnormal status, the digital tube display will show the
corresponding protection code and its parameters, the protection relay and protection output
terminal will work, and the inverter will stop the output. In case of protection, the motor will
stop rotating normally or slow down until it is stopped. The protection contents and solutions of
the EM730/EM730E series inverter are shown in Table Table 9-26.
Table 9-26 Protection Contents and Solutions of EM730/EM730E Series Inverter
Protection
code
Protection Type
Protection Cause
Protection Solution
E01
Short circuit
protection
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.
