aja but that's what I don't understand that 2 live arrive? if you measure in the 2 disconnected cables in the condensing unit it has to measure 220 Volts or 2 live lines and if you measure a live line with respect to Gnd it will measure you around 100 volts and if you do the same with the other line and Gnd It will measure you around 100 volts. so that means that if there is communication between the internal unit and the external unit, and we are assuming that only 3 cables reach the external unit the L1 - L2 --- GND.
If what I indicated to you is correct, then it means that the fault is within
the condensing unit, and you should check that wiring and in the plastic cover that covers the strip there is the electrical scheme of that external unit.
recapitulating, if there is 220 Vac between L1 and L2 of the terminal block of the condensing unit and with the 2 cables detached, that means that if there is communication between the 2 units.
you do this other test with the 2 cables disconnected you put the Tester and turn on the air and there must be 229VAC and turn it off by remote control and turn it back on immediately and measure on the 2 cables and after 3 minutes the 220 must arrive vca and that time
This waiting time of 3 minutes is the protection time for the compressor so that it does not start immediately every time it is operated.
Any questions comment here.