Chapter 9 Troubleshooting  ASDA-B2 
9-6     Revision May, 2018 
AL006: Overload 
Causes  Checking Method  Corrective Actions 
Over the rated 
loading of the drive 
and continuously 
excessive using 
Set parameter P0-02 to 11 and see if 
the average torque [%] is over 100% all 
the time. 
Increase the motor capacity 
or reduce the load. 
The setting of the 
control system 
parameter is 
inappropriate. 
1.  Check if there is any mechanical 
vibration. 
2.  Check if the acceleration / 
deceleration constant are set  
too fast. 
1.  Adjust the gain value of 
the control circuit. 
2. Slow down the 
acceleration / 
deceleration setting time.  
Wrong wiring of the 
motor and the 
encoder. 
Check the wiring of U, V, W and the 
encoder. 
Correct wiring 
The encoder of the 
motor is defective. 
Send the drive back to the distributors or contact Delta.
 
AL007: Overspeed 
Causes  Checking Method  Corrective Actions 
Unreasonable 
command 
Use the scope to check if the signal of 
analog voltage is abnormal. 
Less steep command used 
or filter applying to smooth 
command. 
Inappropriate 
parameter setting 
Check if the setting of parameter P2-34 
is too small (the condition of over-speed 
warning). 
Correctly set parameter  
P2-34 (the condition of  
over-speed warning). 
Torque limit 
1.  Check if DI:TRQLM (torque limit) is 
enabled. 
2.  Check if the torque limit default of 
P1-02 is enabled. 
3.  Check if there is any torque limit 
setting for P1-12 ~ P1-14. 
1.  Disable torque limit DI. 
 
2.  Disable the default 
setting. 
3.  P1-12 ~ P1-14 = 100% 
AL008: Abnormal pulse command 
Causes  Checking Method  Corrective Actions 
The pulse 
command 
frequency is higher 
than the rated input 
frequency. 
Use the scope to check if the input 
frequency is over the rated input 
frequency. 
Correctly set the input pulse 
frequency.