Dear sir,

when we made more trigger alarm is VFD showing fault f1662 and made trip directly.

any one have any solve for this fault.

CU240E-2

Hello,

F01662- Internal communication error.

Please refer this SINAMICS G110M/G120x (CU2x0x-2): information regarding F01625 and F01662 & check the points mentioned in it. If those are OK, try to upgrade firmware & if the problem still persist, you need to contact your nearest Siemens support center.