PROBLEM | POSSIBLE CAUSE | TO CORRECT |
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Compressor will not | Outdoor thermostat. | Refer to the heating data on applicable models for |
turn off and operate on | (Applicable models.) | the preselected temperature the compressor shuts |
heating element only |
| off and the electric element is energized. |
during low outside |
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ambients. |
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Troubleshooting Chart — Cooling
REFRIGERANT SYSTEM
DIAGNOSIS COOLING
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| Low Suction Pressure |
| High Suction Pressure |
| Low Head Pressure |
| High Head Pressure | |||||
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| Low Load Conditions |
| High Load Conditions |
| Low Load Conditions |
| High Load Conditions | |||||
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| Low Air Flow Across |
| High Air Flow Across |
| Refrigerant System |
| Low Air Flow Across | |||||
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| Indoor Coil |
| Indoor Coil |
| Restriction |
| Outdoor Coil | |||||
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| Refrigerant System |
| Reversing Valve not |
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| Reversing Valve not |
| Overcharged | ||||
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| Restriction |
| Fully Seated |
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| Fully Seated |
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| Undercharged |
| Overcharged |
| Undercharged |
| Noncondensables (air) | |||||
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| in | System |
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| Moisture in System |
| Defective Compressor |
| Defective Compressor |
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44
