Air conditioning systems with expansion valve Troubleshooting Procedures parti 1

Air conditioning systems with expansion valve
Troubleshooting Procedures
parti 1

expansion valve Air conditioning


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
 
         abo bahaa eddine
 
   

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