| 1. Establish a manometer on a collector. |
| 2. Start up the engine, leave to work at frequency of rotation of a cranked shaft of 2000 mines-1 and establish a mode of the maximum cooling, at high frequency of rotation of the fan. |
| 3. Open all windows or doors. |
| 4. Establish the thermometer in a lattice of supply of air in car salon. |
| 5. Establish damp and dry thermometers as it is possible closer to an entrance opening of the block of cooling. |
|
6. Check that the pressure shown by a manometer, is in limits of 1,373-1,575 kPa. If pressure too high, pour water on the condenser. If pressure too low, close the forward party of the condenser. |
| 7. Check that air temperature in a lattice of supply of air in salon of the car is in limits 25–35°C. |
| |
8. According to the schedule calculate relative humidity of air, comparing temperature of damp and dry thermometers. |
| 9. Take temperature in a lattice of supply of air in salon of the car and calculate a difference the dry thermometer and the thermometer in a lattice of supply of air. |
|
10. Check that if crossing of relative humidity and a difference of temperatures are in admission limits, means, central air of air works normally. |