What is a P1(PC 01 4th Gen) - P4 Error (PC 04 4th Gen) Code? - MRCOOL DIY Ductless Mini Split

so touching for an excellent video

These no such thing as 230 everything is 120 in your house so that makes it 240 in Az ! Don’t know about other places. Good video bravo

Hello my split unit give P4 error some time but some time its running properly what problem with it kindly tell me..

P1 code ! Over voltage fault should check in coming lines for proper voltage. Check compressor electrical plug for proper connection. If all above okay then should shut unit off, disconnect the compressor plug. Ohm out 2 pins to see you have proper resistance. My guess is 2-4ohm and if you see OL or open in your meter then you have bad compressor
P4 inverter drive error. Again check for supply lines for proper voltages. If okay then should check compressor for short to ground by disconnect the compressor electrical plug. 1 lead to its coil and other to compressor housing you should not see any continuity if you see resistance than compressor winding is shorted cause drive to trigger p4. If no short then go to check for excessive compressor motor winding resistance simply put your test probes between the 2 terminals should read very little resistance and my guess is about 2-5 ohms
Another scenario despite all that checked out okay if your compressor is seized up will also trigger p4 code. A quick trick to un stuck it is to reverse its power input pins and turn on for a quick second then shut the unit off. This allow the compressor spins backward May or may not free it up but at this point you have nothing to lose.
Another scenario could cause P4 is your fan motor. Follow steps above to check for fan motor winding.
If supply voltage, compressor and fan motor, line valves checked out okay then most likely the control board has internal failure and will need to be replaced
Good luck

Where is the drain tray on.the air conditioner?

Koryo pc 04 error how to solve

if your unit is not cooling you will have to hire a tech to check the charge in the system

the P-4 is inverter compressor drive error you will have to take the top and the front panel with the mr cool sticker on the out door unit you will then see the compressor make sure the power is off you will see three wires coming off the top of the compressor follow them up and you will see a white or black plug unplug it and plug it back in grab the wires and push them in the plug power the unit back up and see if the P-4 goes away

if you are getting a P-1 that is over or under voltage check the voltage across the L-1 and L-2 and see if you are getting 120 or 220 look at the silver tag on the side of the unit and it will say 208-230 or 115v

i'm getting P1 code... :(