My patc hotel style ac unit compressor turn off after 6 minutes.

Look at refregent presure

I'm pretty sure the FP code means freeze protection engaged. It prevents the outside coil from freezing

If you are saying this happens on a really cold night, the assumption is that on milder nights, it seems to work adequately.....If that's the case, there is a possibility that it is marginally sized in capacity to heat the space in which it is installed. If it has a "fresh air" damper setting, make sure that is closed completely, because that is air directly from outside the structure that is being brought in through the blower and adds more load to the space and makes the discharge air feel colder.

Cooling gas is missing. Call some AC service in near to fill it, ask more of them for price. Do not switch it on until you solve this to prevent higher damage.

units are measured in btu's there are 12000 btus per ton. there is a number in the model number that is divisible by 12. the 48 in your model number indicates that it is in fact a 4 ton

Hi,
If you reset the GFCI button and then when you go to turn it on the button pops again, then you have a short inside the units probably in the fan motor or the compressor..

heatman101

There is a time delay on the stat to the AC unit, in addition the AC unit likely has one also, so immediate activation as desired isnt likely, however in 10 minutes of asking for AC if its not on still Id check the time delay fuses in the service disconnect at the AC unit, its a small grey box with the power cords running to and from it, there is 2 time delay fuses inside this box.

Condensing unit is not running check the circuit breaker , thermostat on cooling? is this a window unit if so compressor has problem

ckl60 5 ton about a 2003 model on most ac heat pumps the model number reflects the ton sized by 12000 btus per ton also as for the indoor unit cfm rating 400 cfm per ton

Check the Capacitor.