AC200P fan(s) operation

New AC200P user here, I am testing unit, at about 300W AC load, I hear a fan turn on.

Intake fan ON, but exhaust fan OFF

is defective unit?

The fans will turn on as needed depending on the load that’s being used.

After careful and limited inspection and a wiggle or two of suspect fan cable which was not seated in its track fully, I power up, but this time I become aware of POST routine, including fan spin-up. I do not know if this was evident pre-wiggling, and so this post is meaningless but, wow, such a beauty on the inside! Impressive.