Wine-Mate SSR Series - Manual (Page 25)

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8) If the superheat is low, then decrease the evaporator suction pressure by
turning the hex nut (5/16”) counter-clockwise.
9) Both discharge and suction valves must be in the back positions before
disconnecting.
10) Close all service valves and disconnect all manifolds and hoses.
Fig. 15 Expansion Valve
10. Pressure, Superheat and Subcooling Readings
CAUTION:
To read properly the service valves must be in the middle positions.
Complaint Possible Causes
1) High suction pressure and low head pressure
Zero superheat and zero subcooling
2) High suction pressure and low head pressure
Low superheat and low subcooling
3) High suction pressure and high head pressure
Low superheat and high subcooling
4) High to normal suction pressure and high head
pressure
Low subcooling
5) High suction pressure and high head pressure
Low superheat and low subcooling
6) High suction pressure and high head pressure
High superheat
7) Low suction pressure and low head pressure
High superheat and low subcooling
8) Low suction pressure and low to normal head
pressure
High superheat and high subcooling
9) Low suction pressure and low head pressure
Normal to high superheat and low subcooling
10) Low suction pressure and low head pressure
Low superheat and low subcooling
11) Low suction pressure and low to normal head
pressure
High superheat and normal to high subcooling
12) Low suction pressure and normal head pressure
1) Compressor may be bad
2) Expansion valve opened, too
much oil
3) Overcharge
4) Non-condensable
gas
5) Air restricted, dirty condenser,
bad condenser fans
6) High cellar temperature, high
evaporator load
7) Undercharge
8)
Liquid line restricted after
receiver, solenoid valve restricted
9) Suction line restricted
10) Air
restricted at evaporator,
evaporator iced
11) Evaporator restricted
12) Expansion valve restricted