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| Motor runs hot |
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| 3. | Compressor | is |
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| 3. | Do not allow the compressor to run over |
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| exceeding | its duty- |
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| its recommended duty cycle. |
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| cycle. |
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| Pressure relief |
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| 1. | Faulty | pressure |
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| 1. | Turn compressor off, unplug from power |
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| valve | stays |
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| switch, unit is trying |
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| supply, drain tank. DO NOT USE until |
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| open | and |
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| to overpressure | the |
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| switch is repaired or replaced. |
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| motor | won’t |
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| tank. |
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| 2. | Relief valve is relieving pressure too |
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| stop running. |
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| 2. | Faulty | pressure |
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| early, test pressure relief and repair or |
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| relief valve. |
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| replace. |
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| Air leaks from |
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| 1. | Faulty check valves. |
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| 1. | Clean dirt or debris from rubber mem- |
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| p r e s s u r e |
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| brane of check valve after removing top |
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| switch |
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| nut. |
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| 2. faulty | pressure |
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| 2. | Repair or replace pressure switch. |
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| switch. |
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| Air is | dirty or |
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| 1. Tank is not drained. |
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| 1. Open drain cocks on both tanks and make |
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| has excessive |
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| certain all condensation water is drained |
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| moisture. |
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| 2. | Delivery pipes | are |
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| out. |
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| 2. | Remove delivery pipes, clean out and |
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| dirty. |
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| replace. |
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Model H4517/H4518Air Compressors |
