Hi All

This is my first time posting on this forum.

I have a Samsung DMV plus 4 system showing error code E454. This states RPM error on outdoor unit fan motor.
I will be attending site soon to try and rectify this fault. Can anybody point me in the right direction as to what may be causing this issue or how it can be resolved?
I have worked on this site before and I know that the outdoor units are in an acoustic enclosure which may restrict airflow, am I correct in thinking this could be causing the issue.

All input will be much appreciated,

Thanks.