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 IncreaseIncreaseWarmerWarmerColderIncrease
Refrigerant
Shortage Decrease Decrease or Increase
See "Refrigerant
Shortage Symptoms"ColderWarmerWarmerDecrease
Partial
Restriction Decrease Decrease or Increase
See "Restriction
Symptoms"ColderWarmerWarmerDecrease
Air in System Near NormalIncreaseWarmerWarmerWarmerIncrease
Low Ambient
Installation
(Reverse for
High Ambient
Installation)
Decrease Decrease ColderWarmerWarmerDecrease
Additional
Heat Load IncreaseIncreaseWarmerWarmerWarmerIncrease
Inefficient
Compressor IncreaseNormal or DecreaseWarmer or ColderWarmerWarmerDecrease