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RS1200001 10 November 1996
System Diagnosis
Pressure and Relationship Chart
Condition Suction
Pressure
Variation
from Normal
Head Pressure
Variation from
Normal
T1 Inlet
Temperature
Variation from
Normal
T2 Outlet
Temperature
Variation from
Normal
T3 Suction
Temperature
Variation from
Normal
Wattage
Variation from
Normal
Refrigerant
Overcharge
Increase Increase Warmer Warmer Colder Increase
Refrigerant
Shortage
Decrease
Decrease or Increase
See "Refrigerant
Shortage Symptoms"
Colder Warmer Warmer Decrease
Partial
Restriction
Decrease
Decrease or Increase
See "Restriction
Symptoms"
Colder Warmer Warmer Decrease
Air in System
Near Normal Increase Warmer Warmer Warmer Increase
Low Ambient
Installation
(Reverse for
High Ambient
Installation)
Decrease Decrease Colder Warmer Warmer Decrease
Additional
Heat Load
Increase Increase Warmer Warmer Warmer Increase
Inefficient
Compressor
Increase Normal or Decrease Warmer or Colder Warmer Warmer Decrease