Troubleshooting
Troubleshooting
•Relieve the pressure before checking or servicing the equipment.
•Check all possible problems and causes before disassembling the pump.
PROBLEM | CAUSE | SOLUTION |
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Pump cycles at stall or fails to hold | Worn check valve balls (541) or | Replace. See page 19. |
pressure at stall. | seats (233). |
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Pump will not cycle, or cycles once | Air valve is stuck or dirty. | Disassemble and clean air valve. |
and stops. |
| See page 16. Use filtered air. |
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| Check valve ball (541) severely | Replace ball and seat. See page |
| worn and wedged in seat (233) or | 19. |
| manifold. |
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| Check valve ball (541) is wedged | Follow Pressure Relief Proce- |
| into seat (233), due to overpressur- | dure, page 10. Disassemble ball |
| ization. | check assembly and inspect for |
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| damage, see page 19. |
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| Dispensing valve clogged. | Relieve pressure and clear valve. |
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| Leak detector has activated a shut- | Investigate failure and reset leak |
| down solenoid | detector |
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Pump operates erratically. | Clogged suction line. | Inspect; clear. |
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| Sticky or leaking balls (541). | Clean or replace. See page 19. |
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| Diaphragm ruptured. | Replace. See page 21. |
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| Restricted exhaust. | Remove restriction. |
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Air bubbles in fluid. | Suction line is loose. | Tighten. |
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| Diaphragm ruptured. | Replace. See page 21. |
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| Loose inlet manifold, damaged seal | Tighten manifold clamps or replace |
| between manifold and seat, dam- | seats or gaskets. See page 19. |
| aged gaskets. |
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14 | 310622L |
