Order of execution
1. Start the engine, let it run at 1500 rpm–1.
2. Set the A/C switch to the ON position.
3. Set the temperature control knob to the coldest position.
4. Set the fan control knob to maximum speed.
5. After 5 minutes, check if the amount of refrigerant is sufficient according to the following table.
Check point | Refrigerant quantity | |||
Too few | Not enough | Fine | Too much | |
Temperature of high and low pressure pipes | Almost no temperature difference between high and low pressure tubes | The pipe on the high pressure side is warm, and on the low pressure side it is cold | The pipe on the high pressure side is hot and on the low pressure side it is cold | Tube on high pressure side too hot |
Repair | Stop the compressor and carry out a complete check | Check for leaks, repair them and charge the air conditioning system | Tube on high pressure side too hot |