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what is the outdoor model number?
This unit resets just by removing 24v signal..ie - turn off ac and back on.
Here is a service manual
then it is not a resettable issue.
Do you have an active alert?
This is a high head pressure code.
This means it depends why it tripped..
fan motor not working, coils plugged etc.. With this unit it is commonly an issue with the condensing fan motor.
So in other words...your code will not reset while the issue still exist
have you tapped that switch?
Ok lets try a hard reset..
Turn off breaker to ac unit
Turn off breaker to indoor blower/furnace
1 minute later turn on ac unit, then furnace