TROUBLESHOOTING CHART - COOLING
REFRIGERANT SYSTEM DIAGNOSIS COOLING
PROBLEM |
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LOW SUCTION PRESSURE |
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| HIGH SUCTION PRESSURE |
| LOW HEAD PRESSURE | |||
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PROBLEM
HIGH HEAD PRESSURE
Low Load Conditions
Low Air Flow Across
Indoor Coil
Refrigerant System
Restriction
Undercharged
Moisture in System
High Load Conditions
High Air Flow Across
Indoor Coil
Reversing Valve not Fully Seated
Overcharged
Defective Compressor
Low Load Conditions
Refrigerant System
Restriction
Reversing Valve not Fully Seated
Undercharged System
Defective Compressor
High Load Conditions
Low Air Flow Across
Outdoor Coil
Overcharged
TROUBLESHOOTING CHART - HEATING
REFRIGERANT SYSTEM DIAGNOSIS HEATING
PROBLEM
LOW SUCTION PRESSURE
Low Air Flow Across
Outdoor Coil
Refrigerant System
Restriction
Undercharged
Moisture in System
PROBLEM |
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HIGH SUCTION PRESSURE |
| LOW HEAD PRESSURE | ||
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Outdoor Ambient Too High |
| Refrigerant System | ||
for Operation in Heating |
| Restriction | ||
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Reversing Valve not |
| Reversing Valve not | ||
Fully Seated |
| Fully Seated | ||
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Overcharged |
| Undercharged | ||
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Defective Compressor |
| Defective Compressor | ||
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PROBLEM
HIGH HEAD PRESSURE
Outdoor Ambient Too High For Operation In Heating
Low Air Flow Across
Indoor Coil
Overcharged
in System
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