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1. TECHNOLOGICAL UNIVERSITY (YAMETHIN)
DEPARTMENT OF MECHANICAL ENGINEERING
(2022-2023) ACADEMIC YEAR
PIT & GO MUDON MAUNG MAUNG
Internship Presentation
Presented By
Ma Phoo Pwint Phyo
Ma Thandar Hlaing
Ma Zin Mar Htet
Ma Khaing Swe Thant
21.11.2022

2. INTRODUCTION
 Car Air Con
 Electronic Component
 Warning Light
 Tire

3. Low-pressure side = 1.5 ~ 2.5 Bar
High-pressure side = 13.7 ~ 15.7 Bar

4. Pressure Gauges Reading

5. Cause
Refrigerant quantity is low
Gas leak
Action Point
Charge additional
refrigerant.
Inspect and repair the
source of the gas leak.

7. Cause
Refrigerant overcharging
Insufficient condenser
cooling
Action Point
Adjust the refrigerant
quantity to the correct
amount.
Clean the condenser.
Check the vehicle cooling
system.

9. Cause
Moisture intrusion
Action Point
Replace the receiver.
Conduct a sufficient
amount of evacuation
before charging
refrigerant.

11. Cause
Faulty compressor
Compressor displacement
regulator valve defective
Action Point
Replace the compressor.

12. Refrigerant Filling
Air Con Gas Release
Engine = Stop
Low Pressure Valve = Open
High Pressure Valve = Close ( Open Under LP 1 Bar )
Evacuation
Low Pressure side = Open
High Pressure side = Open

13. Evacuation
Low Pressure side = Open
High Pressure side = Open
Waiting Time = At least 15 minutes
Low Pressure valve = Close
High Pressure valve = Close
Waiting Time = 10 ~ 15 minutes

14. Gas Filling
Low Pressure valve = Close
High Pressure valve = Open ( Till LP 1 Bar )
Low Pressure valve = Open ( After 1 Bar )
High Pressure valve = Close
Engine Running = (1500 ~ 2000 rpm )

15. (10) Types of Warning Light
1. Charging Warning Light
2. Airbag and Seat Belt Warning
3. Hand Brake Warning
4. Diesel Particulate Filter - DPF -Warning
5. Washer Fluid Warning
6. Engine Oil Pressure Warning
7. Door Open Warning
8. Engine Coolant
9. Tire Pressure Warning
10. Anti-lock Brake System Warning

16. 1.Charging Warning Light

17. 2.Airbag and Seat Belt Warning Light

18. 3.Hand Brake Warning Light

19. 4. Diesel Particulate Filter ( DPF )
Warning Light

20. 5. Washer Fluid Warning Light

21. 6. Engine Oil Pressure Warning Light

22. 7. Door Open Warning Light

23. 8. Engine Coolant Warning Light

24. 9. Tire Pressure Warning Light

25. 10. Anti-lock Brake System ( ABS )
Warning Light

26. Basic Electronic Components
1. Wire
2. Ground
3. Resistor
4. Variable resistor
5. Coil
6. Light Bulb

27. 1. Battery
2. Condenser
3. Switch
4. Fuse
5. Transistor
6. Motor

28. Resistor

29. Symbol of resistor

30. Resistor Circuit

32. Capacitor

33. Capacitor Reading

35. Diode

36. Types of diodes

37. Diode Current Path

38. Diode Test

39. Tire

42. Load Index

43. Tire Life

44. Tire Tread