TROUBLESHOOTING
Risk of Unsafe Operation. Unit cycles automatically when power is on. When servicing, you may be exposed to
voltage sources, compressed air, or moving parts. Before servicing unit unplug or disconnect electrical supply to the air compressor, bleed tank of pressure, and allow the air compressor to cool.
| PROBLEM | CAUSE |
| CORRECTION | ||||
| Excessive tank | Pressure switch does not | Move On/Auto/Off lever to | |||||
| pressure - | shut off motor when | the “OFF” position, if the | |||||
| safety valve | compressor reaches “cut- | outfit does | |||||
| pops off. | out” pressure. | not shut off contact a | |||||
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| Trained Service Technician. | |||||
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| Pressure switch | Contact a Trained Service | |||||
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| too high. | Technician. | |||||
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| Air leaks at | Tube fittings are not tight | Tighten fittings where air can | |||||
| fittings. | enough. | be heard escaping. Check | |||||
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| fittings with soapy water | |||||
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| solution. DO NOT | |||||
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| OVERTIGHTEN. | |||||
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| Air leaks at or | Check valve seat damaged. |
| A defective check valve | ||||
| inside check |
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| results in a constant air leak | ||||
| valve |
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| at the pressure release valve | ||||
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| when there is pressure in the | ||||
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| tank and the compressor is | ||||
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| shut off. Replace check | ||||
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| valve. Refer the “To Replace | ||||
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| or Clean Check Valve” in the | ||||
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| “Service and Adjustment” | ||||
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| Air leaks at | Defective pressure switch | Contact a Trained Service | |||||
| pressure switch | release valve. | Technician. | |||||
| release valve. |
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| (if equipped) |
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| Air leaks in air | Defective air tank. | Air tank must be replaced. | |||||
| tank or at air |
| Do not repair the leak. | |||||
| tank welds. |
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| Risk of | |
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| Bursting. | |
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| Do not drill into, weld or | |||||
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| otherwise modify air tank | |||||
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| or it will weaken. The tank | |||||
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| can rupture or explode. | |||||
| Air leaks | Leaking seal. | Contact a Trained Service | |||||
| between head |
| Technician. | |||||
| and valve plate. |
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D28301 | 22- ENG |
