| 2. |
Check with sight glass |
| Check the refrigerant amount by the
refrigerant flow in the sight glass. |
 |
Correct |
Almost no bubbles
This means that the refrigerant volume is correct. |
| |
 |
Insufficient |
Continuous flow of bubbles
This means that the refrigerant volume is insufficient. |
| |
 |
Empty or Excess |
No bubbles observed
This means that there is no refrigerant in the system, or the volume of refrigerant in the system is excessive. |
| |
| HINT: |
|
•
|
This type of inspection is not appropriate where a system fault is apparent |
|
•
|
This type of inspection should not be used on A/C systems with a sub-cooling condenser. as the absence of bubbles could indicate a refrigerant volume that is less than the specified amount. |
