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P4 looks like a conpressor error on the outdoor unit. Possibly a voltage spike, pull the disconnect at the out door unit for 10 seconds and reinsert hopefully error clears. If not you will need to open outdoor unit and get error off of outdoor pcb
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i don't know much about these units,don't work on them but work on sub zeros and have helped out some customers that have me look at them,usually what i find is when they are cool but not cold is the coil is blocked with dust and the heat can't escape from the machine,i use a shop vac,i vac out as much of the dust that i can see and then set it up to blow and blow out the coil,after doing this it usually works
we have a split type gree aircon, with one (1) horsepower. it was just newly installed, around 6 months ago. we are just surprised that one when my wife turned it on, thru the use of its remote control, the indicator box on the aircon reads or flashes "F2". I detached the batteries of the remote control for severa hours and I also detached the power cord from the wall socket, but it was to no avail. it did not work. with "F2" on the indicator box, the aircon won't give cool air, it is just working like an ordinary fan. please help us.
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