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Chapter 6 Troubleshooting
6-1.Fault alarm and countermeasures
PI500-W can provide effective protection when the equipment performance is played fully. In
case of abnormal fault, the protection function will be invoked, the inverter will stop output, and
the faulty relay contact of the inverter will start, and the fault code will be displayed on the display
panel of the inverter. Before consulting the service department, user can perform self-check ,
analyze the fault cause and find out the solution according to the instructions of this chapter. If the
fault is caused by the reasons as described in the dotted frame, please consult the agents of inverter
or directly contact with our company.
1.The short circuit of inverter
output happens
2.The wiring for the motor and the
inverter is too long
3.Module overheating
4.The internal wiring of inverter is
loose
5.The main control panel is
abnormal
6.The drive panel is abnormal.
7.The inverter module is abnormal
1.Eliminate peripheral faults
2.Additionally install the
reactor or the output filter
3.Check the air duct is blocked
or not and the fan is working
normally or not, and eliminate
problems
4.Correctly plug all cables
5.Seek for technical support
Acceleration
over current
1.The acceleration time is too short
2.Manual torque boost or V/F
curve is not suitable
3.The voltage is low
4.The short-circuit or earthing of
inverter output happens
5.The control mode is vector and
without identification of
parameters
6.The motor that is rotating is
started unexpectedly.
7.Suddenly increase the load in the
process of acceleration.
8.The type selection of inverter is
small
1.Increase acceleration time
2.Adjust manual torque boost
or V/F curve
3.Set the voltage to the normal
range
4.Eliminate peripheral faults
5.perform identification for the
motor parameters
6.Select Speed Tracking Start
or restart after stopping the
motor.
7.Cancel the sudden load
8.Choose the inverter with
large power level
Deceleration
over current
1.The short-circuit or earthing of
inverter output happens
2.The control mode is vector and
without identification of parameters
3.The deceleration time is too short
4.The voltage is low
5.Suddenly increase the load in the
process of deceleration.
6.Didn't install braking unit and
braking resistor
1.Eliminate peripheral faults
2.Perform identification for the
motor parameters
3.Increase the deceleration time
4.Set the voltage to the normal
range
5.Cancel the sudden load
6.Install braking unit and brake
resistor
Constant speed
over current
1.The short-circuit or earthing of
inverter output happens
2.The control mode is vector and
without identification of parameters
1.Eliminate peripheral faults
2.perform identification for the
motor parameters
3.Set the voltage to the normal
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