25) Which safety switch deactivates the compressor motor circuit if suction pressure falls below the safe limit in package AC?

26) How to position the liquid line valve to start the pump down operation in split AC?

27) What is the position of knob selected in thermostat to check its working condition in package AC?

28) Which document is used for writing the AC system parameters round the clock?

29) Which operation is carried out first in selector switch after installation of package AC?