Samsung MH060fxea3a FJM

Helo
I have a mh060fxea3a with 3 unit but i have a problem the outdoor unit compresor frequency is 65hz with all 3 indoor unit on on heating mode goes up to 84hz-87hz
Can someone make a chek on the outdoor unit with the k4 to see what value you have with all 3 unit on in cool mode
The refrigerant pressure in cool mode with 3 unit is 8.0bar and aprox 6-7°C
I change the 3uF cond from the outdoor fan motor......
I change all 4 sensor from tre outdoor unit
I charge the exact 2kg refrigerant
I mesure the 10kohms indoor sensor
I allso change the outdoor pcb
Please help