Operation Panel Display Is Not Operating; The Motor Current Is Too Large - Mitsubishi Electric 800 Series Instruction Manual

2.6.10 Operation panel display is not operating.

Check
point
Main
circuit,
The power is not input.
control
circuit
The operation panel is not properly
Front cover
connected to the inverter.

2.6.11 The motor current is too large

Check
point
The torque boost (Pr.0, Pr.46) setting is
not appropriate under V/F control, so the
stall prevention function is activated.
The V/F pattern is not appropriate when
V/F control is performed. (Pr.3, Pr.14,
Pr.19)
Parameter
The stall prevention (torque limit) function
setting
is activated due to a heavy load.
Offline auto tuning is not performed under
Advanced magnetic flux vector control or
Real sensorless vector control.
When PM sensorless vector control is
selected, offline auto tuning is not
performed.
37
2. Protective Functions
2.6 Check first when you have a trouble
Possible cause
Possible cause
Input the power.
Check if the inverter front cover is installed securely.
Increase/decrease the Pr.0 Torque boost setting value by 0.5% increments so that
stall prevention does not occur.
Set the rated frequency of the motor to Pr.3 Base frequency. Use Pr.19 Base
frequency voltage to set the base voltage (for example, rated motor voltage).
Change the Pr.14 Load pattern selection setting according to the load
characteristic.
Reduce the load weight.
Set Pr.22 Stall prevention operation level (Torque limit level) higher according
to the load. (If Pr.22 is set too high, an overcurrent trip (E.OC[]) is likely to occur.)
Check the capacities of the inverter and the motor.
Perform offline auto tuning.
Perform offline auto tuning for the IPM motor.
Countermeasure
Countermeasure