T958_O or A958_O: High Refrigerant Pressure
On the outdoor unit control, this will be indicated by a number 29 or L29 on the seven segment LED display.
This alarm means that the high pressure switch has opened as a result of high refrigerant pressure. Verify charge, check condition of outdoor coil, verify outdoor fan motor is running as it should. System will lock out if high pressure switch trips 3 times in an single cooling call.
