SYMPTOMS | PROBABLE CAUSE | REMEDY |
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| g. Defective refrigerant | g. Repair or replace |
| compressor valves. | compressor. |
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| h. Suction pressure too high. | h. Adjust hot gas bypass |
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| valve. |
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Dryer running. | a. Leaky refrigerant circuitry. | a. Locate and repair. |
High temperature light on, |
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analyzer gauge pressure low. | b. Suction pressure too low | b. Adjust hot gas |
| Check refrigerant charge. | bypass valve. |
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Dryer running. | a. Defective hot gas bypass | a. Replace. |
High temperature light off, | valve. |
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analyzer gauge pressure low. |
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| b. Defective fan control | b. Replace. |
| (low ambient control). |
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| c. Low ambient temperature. | c. Heat ambient or relocate |
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| dryer. |
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| d. Low refrigerant charge. | d. Repair leak and add |
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| refrigerant. |
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Dryer not running. | a. Low pressure switch open. | a. Check for leak and repair. |
High temperature light on, |
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analyzer gauge pressure low. | b. Service valves closed. | b. Open valves. |
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| c. High suction gas | c. Check for leak. |
| temperature. |
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Water downstream of | a. Trap not functioning. | a. Clean or repair trap. |
the dryer. |
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| b. High inlet temperature. | b. Check aftercooler. |
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| c. Excess flow. | c. Dryer undersized. |
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| Replace with larger dryer. |
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| d. Low air pressure. | d. Dryer undersized. |
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| Replace with larger dryer. |
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| e. Bypass valve open. | e. Close valve. |
TROUBLESHOOTING GUIDE continued
SYMPTOMS
PROBABLE CAUSE
REMEDY
12