OPF1 is the output phase loss fault.
This fault appears when one motor phase is loss on the output of the drive
The minimum time to detect one motor phase loss is 500ms.
The threshold by phase is: I (U,V,W)< Drive nominal current /4 during ODT ( Output phase loss detection time ).
(1) Check the connections between the drive and motor.
(2) Depending on the application type and the motor setting, increase Odt[OutPh time detect] parameter.