My experience of Variable Speed compressor is good and bad.
Good is, my factory achieve about 7% energy saving on the Variable speed compressor, from replacing the old fixed speed unit.
But, bad is the supplier charged my factory very expensive to trouble shoot the inverter board issue when it happened 6 months ago. One morning, the Variable speed compressor just tripped and cannot be started. The supplier technicians came many times but he failed to find the root cause and blame the inverter board has burnt and he cannot do anything. Then, they sent the Inverter board supplier to investigate and replace a new board. The total cost of the repair (or replacing the board) is as much as 40% of the compressor price !
The compressor supplier didn’t highlight the issue of hot temperature when they promote the unit to us. Even their technician who commissioned the unit didn’t say anything about the room temperature.