Residential HVAC Installation Practice Exam

It is not advisable to start the compressor immediately after connecting power to the condensing unit of a package air conditioner because doing so can cause damage to the compressor. When the power is first connected, there may be a buildup of pressure in the system which could potentially harm the compressor if it starts running immediately. Therefore, it is important to allow some time for the pressure in the system to stabilize before starting the compressor to ensure its longevity and proper functioning.