Yaskawa inverter problem

C

Thread Starter

Chungtq

Dear all,

We are using 9 Yaskawa inverter model CIMR-G3A2011. Some inverters have fault: we can not increase motor speed by using potentiometer. We don't know the cause. We checked by using operator panel but the results is the same.
Please help us find the key for this problem.

Thanks and best regards,
Tran Quang Chung
 
This is a very old model. Two possible causes.

1) The pot might be faulty. Just link a 10v to the reference input to confirm the pot is ok. *must use 3-5K pot for Japanese inverter. 10K pot will not work...

2) Some one might change the parameter setting to keypad control.

3) Time to change to a new model.
 
maybe your drive is working on torque control so you can't raise the speed until the torque needed by the load as dropped...

(sorry for my english but i hope it can helps if the problem is not solved yet !)

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