Piston pin
Thermostat control
Automatic expansion valve
Thermostatic expansion valve
TEV
AEV
HPC
EEV
Correct oil level
Capacity of the pump
Weight of vacuum pump
Available ac power supply
One outdoor unit for one indoor unit
two outdoor units for one indoor unit
Several outdoor units for one indoor unit
One outdoor unit for several indoor units
Crank shaft and connecting rod
Rotor and stator
Swash plate
Blower unit