Troubleshooting Guideline For Refrigerant Circuit - York YAWS018 - 075 Installation Manual

Troubleshooting Guideline for Refrigerant Circuit

The chart below will assist in determining if measurements taken at the unit are within factory specifications and aid in
accurate diagnosis (SYMPTOM) and repair. The chart is general in nature and represents whether a symptom would result in
normal, high, or low readings from the typical operating range.
Symptom
Under Charged System (Possible Leak)
Over Charged System
Low Water Flow Evaporator
Low Water Flow Condensor
High Water Flow Evaporator
High Water Flow Condensor
Restricted TXV (Check Service Advisory)
Insufficient Compressor
(Possible Bad Valves)
TXV - Bulb Loss of Charge
Scaled Coaxial Heat Exchanger Evaporator
Scaled Coaxial Heat Exchanger Condensor
Restricted Filter Drier
AFFINITY SINGLE STAGE HYDRONIC INSTALLATION MANUAL
Head Suction
Pressure Pressure
Low Low
High High
Low/Normal Low/Normal
High High
Normal Low
Low Low
High Low
Low High
Low Low
Low Low
High High
Check temperature difference (delta T) across filter drier.
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Compressor
Superheat
Amp Draw
Low High
High Normal
Low Low
High High
Normal High
Low Low
Normal/Low High
Low High
Low High
Low Normal/Low
High Normal/Low
Water Temp.
Subcooling
Differential
Low Low
High Normal
High High
Low High
Normal Low
High Low
High Low
Normal/High Low
High Low
High Low
Low Low
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