Vinotemp WM250-850SCU Benutzerhandbuch

                                                                                

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5.  Pressure, Superheat and Subcooling Readings 
 

NOTES: THE VALVES MUST BE IN THE MIDDLE POSITIONS TO READ 
PROPERLY. 
 

a.  High suction pressure and low head pressure 
b.  High suction pressure and low head pressure 
       Low superheat and low subcooling 
c.  High suction pressure and high head pressure 
       Low superheat and high subcooling 
d.  High to normal suction pressure and high head pressure 
       Low subcooling 
e.  High suction pressure and high head pressure 
       Low subcooling 
f. 

High suction pressure and high head pressure 

      High superheat  
g.  Low suction pressure and low head pressure 
      High superheat and low subcooling 
h.  Low suction pressure and low to normal head pressure 
      High superheat and high subcooling 
 
i. 

Low suction pressure and low head pressure 

      Low subcooling 
j. 

Low suction pressure and low head pressure 

      Low superheat and low subcooling 
k.  Low suction pressure and low to normal head pressure 
      High superheat and normal to high subcooling 
l. 

Low suction pressure and normal head pressure 

      High superheat and normal subcooling 
m.  Low suction pressure and high head pressure 
      High superheat and high subcooling 
n.  Low  suction pressure and high head pressure 
       High superheat and high subcooling 
o.  low to normal suction pressure and high head pressure 
       High to normal superheat and high subcooling 
 

a.  Compressor may be bad 
b.  Expansion valve opened, too 

much oil 

c. Overcharge 
 
d. Non-condensable 

gas 

 
e.  Air restricted, dirty condenser, 

bad condenser fans 

f.  High room temperature, high 

evaporator load 

g. Undercharge 
 
h. Liquid line restricted after 

receiver, solenoid valve 
restricted 

i. 

Suction line restricted 

 
j.  Air restricted at evaporator, 

evaporator iced 

k. Evaporator 

restricted 

 
l. 

Expansion valve restricted  

 
m.  Both evaporator and condenser 

restricted 

n. Liquid line restricted before 

receiver 

o. Condenser 

restricted