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