Troubleshooting
Troubleshooting
Mechanical/Fluid Flow
1.Follow Pressure Relief Procedure, page 13, before checking or repairing.
2.Check all possible problems and causes before disassembling the unit.
| What to Check | What to Do |
| If check is OK, go to next | When check is not OK, |
Problem | check | refer to this column |
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For units with display: | Fault condition exists. | Determine fault correction from |
E=0X is displayed. |
| Electrical, page 32. |
For units with no display: Control |
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board status light is blinking or the |
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light is off and there is power to the |
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sprayer. |
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Pump output is low | Spray tip worn. | Follow Pressure Relief Procedure, |
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| page 13, then replace tip. See |
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| separate gun or tip manual. |
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| Spray tip clogged. | Relieve pressure. Check and clean |
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| spray tip. |
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| Paint supply. | Refill and reprime pump. |
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| Intake strainer clogged. | Remove and clean, then reinstall. |
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| Intake valve ball and piston ball are | Remove intake valve and clean. |
| not seating properly. | Check balls and seats for nicks; |
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| replace if necessary. See pump |
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| manual. Strain paint before using to |
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| remove particles that could clog |
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| pump. |
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| Fluid filter or tip filter is clogged or | Clean filter. |
| dirty. |
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| Prime valve leaking. | Follow Pressure Relief Procedure, |
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| page 13, then repair prime valve. |
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| Verify pump does not continue to | Service pump. See pump manual. |
| stroke when gun trigger is released. |
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| (Prime valve not leaking.) |
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| Leaking around throat packing nut | Replace packings. See pump manual. |
| which may indicate worn or damaged | Also check piston valve seat for |
| packings. | hardened paint or nicks and replace if |
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| necessary. Tighten packing |
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334530A | 29 |