Air conditioning systems with expansion valve Troubleshooting Procedures parti 1

Air conditioning systems with expansion valve
Troubleshooting Procedures
parti 1

Correct evaluation of the pressure manometer display is particularly important. Here are some examples:

1-

Low pressure:

 hoch

High pressure:

high

Outflow temperature at the centre vent:

higher, up to
ambient temperature

Possible causes:

engine overheated, condenser
contaminated, condenser fan
defective-incorrect direction of
rotation, system overfilled

2-

Low pressure:

normal to occasionally low

 

High pressure:

 high, occasionally

Outflow temperature at the centre vent: 

 higher, possibly fluctuating

Possible causes: 

expansion valve stuck, occasionally
closedzXDF

3-  

Low pressure:

  normal

 ">

High pressure:

 high

Outflow temperature at the centre vent:

 slightly higher

Possible causes:  

filter dryer aged, condenser
contaminated

4- 

Low pressure:

 hoch

High pressure:

normal to high

Outflow temperature at the centre vent: 

higher depending on bottleneck

Possible causes: 

line from condenser to
expansion valve narrowed

5-   

Low pressure:

 normal

High pressure: 

 normal

Outflow temperature at the centre vent:  

higher

 Possible causes: 

 too much refrigerant oil in the system

 

         kandi younes