Vinotemp Wine-Mate WM-2500SSD Installation, Operation & Care Manual page 25

10. Pressure, Superheat and Subcooling Readings
CAUTION:
To read properly the service valves must be in the middle positions.
Complaint
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
High superheat and normal subcooling
13) Low suction pressure and high head pressure
High superheat and high subcooling
14) Low suction pressure and high head pressure
High superheat and high subcooling
15) low to normal suction pressure and high head
pressure
Normal to high superheat and high subcooling
11. Condensing Unit Troubleshooting
1) Incorrect power supply
2) Incorrect or loose wirings
3) Failed components
4) Low pressure switch shutting down the
system
5) high pressure switch shutting down the
system
1) Compressor may be bad
2) Expansion valve opened, too
3) Overcharge
4) Non-condensable gas
5) Air restricted, dirty condenser,
6) High cellar temperature, high
7) Undercharge
8) Liquid
9) Suction line restricted
10) Air
11) Evaporator restricted
12) Expansion valve restricted
13) Both evaporator and condenser
14) Liquid
15) Condenser restricted
Unit not running
1) Check for proper voltage
2) Check all wirings and connections
3) Check
overload protector, compressor.
4) Check for system restriction or low
refrigerant
5) Check for the condenser fan
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Possible Causes
much oil
bad condenser fans
evaporator load
line restricted
receiver, solenoid valve restricted
restricted at evaporator,
evaporator iced
restricted; liquid and suction lines
connected wrong
line restricted
receiver
start relay, start capacitor,
after
before