The "trickle heat" refers to a method of keeping the compressor warm whenever it's off for extended periods. I honestly don't know if the fujitsu systems have it.
I personality tell my customers to leave the fan setting in auto. You can't really enjoy just how quiet these systems can be otherwise.
Leaving the fan speed locked in high may have it's purpose, but it will also generate a much cooler heat and during the summer months the system will not be able to dehumidify the space as affectively.