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| Advanced Troubleshooting |
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Specific Problem | Cause | Solution |
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Motor runs and pump cycles, | Intake valve or outlet valve is | Remove and clean inlet valves and outlet valves. |
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but pressure does not build up. | not seating properly. | Replace if necessary. See List of Kits, page 26. |
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| Pump packings are worn or | Check for leaking around pump. |
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| damaged. | ProX7 and ProX9: Replace pump packings. See |
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| List of Kits, page 26. |
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| X5 and X7: Replace complete pump. See List of |
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| Kits, page 26. |
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General Problem: Excessive Pressure Build Up |
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Specific Problem | Cause | Solution |
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Prime/Spray Valve actuates | Pressure control switch has | Replace pressure control switch using Pressure |
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automatically, relieving | pinched wires. | Control Switch Kit, page 26. |
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pressure through drain tube. |
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Water or paint entered | Use Pressure Control Switch Kit, to replace |
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| pressure control switch or | switch. See List of Kits, page 26. |
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| shorted control board. |
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| Control board failed. | See Control Board Diagnostics, page 25. |
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| Replace damaged control board using Control |
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| Board Kit, page 26. |
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22 | 312667B |
