E9—Motor overspeed error

(exceed the designed max speed)

Step of solution
If the motor angle correct；Check the operating box monitoring interface DJ [Observe if the motor angle is in the range of 252 ± 5] (if the deviation of motor angle is too big, then motor acceleration or will cause large current or ​​speed uncontrolled phenomena)
Judging whether the motor is working or not: using a multimeter (Ω block) to measure motor socket pin 4 and pin1, 2, 3  whether there is short-circuit， or whether the impedance among motor three-phase U [2], V [2], W [1] is same issue.