Troubleshooting
Relieve pressure; page 6.
MOTOR WON’T OPERATE
TYPE OF PROBLEM | WHAT TO CHECK | WHAT TO DO | |||
| If check is OK, go to next check | When check is not OK refer to this column | |||
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Basic Fluid Pressure | 1. | Pressure control knob setting. Motor will not run | 1. | Slowly increase pressure setting to see if mo- | |
Problems |
| if at minimum setting (fully counterclockwise). |
| tor starts. | |
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| 2. | Spray tip or fluid filter may be clogged. | 2. | Relieve pressure and clear clog or clean fil- | |
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| ter; refer to separate gun or tip instruction | |
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| manual. | |
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Basic Mechanical | 1. | Pump (13) frozen or hardened paint. | 1. | Thaw sprayer if water or | |
Problems |
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| has frozen in sprayer. Place sprayer in warm | |
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| area to thaw. Do not start sprayer until | |
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| thawed completely. If paint hardened (dried) | |
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| in sprayer, replace pump packings. See | |
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| page 26 (Displacement Pump Replace- | |
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| ment). | |
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| 2. | Displacement pump connecting rod pin (9a). | 2. | Push pin into place and secure with spring re- | |
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| Pin must be completely pushed into connecting |
| tainer. | |
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| rod (9) and retaining spring (9b) must be firmly |
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| in groove of pump pin. See Fig. 18. |
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| 3. | Motor (1). Remove drive housing assembly | 3. | Replace motor (1) if fan won’t turn. See page | |
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| (10). See page 24. Try to rotate fan by hand. |
| 25. | |
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Basic Electrical Problems | 1. | Motor control board. Board shuts down and dis- | 1. | See Motor Control Board Diagnostics, | |
See Wiring Diagram, pages |
| plays error code on some models. |
| page 19. | |
15 to 18. |
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2. | Electrical supply. Meter must read | 2. | Reset building circuit breaker; replace build- | ||
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| VAC for |
| ing fuses. Try another outlet. | |
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| VAC for 240 VAC models. |
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| 3. | Extension cord. Check extension cord continu- | 3. | Replace extension cord. | |
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| ity with volt meter. |
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| 4. | Sprayer power supply cord. Inspect for damage | 4. | Replace power supply cord. | |
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| such as broken insulation or wires. |
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5.Fuse. Check replaceable fuse on control board. 5. Replace fuse after completing motor inspec- tion.
| 6. Motor leads are securely fastened and properly | 6. | Replace loose terminals; crimp to leads. Be | |
| connected to control board. |
| sure terminals are firmly connected. |
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| Clean circuit board terminals. Securely re- | |
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| connect leads. |
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| 7. Motor thermal switch. Yellow motor leads must | 7. Replace motor. See page 25, Motor Re- | ||
| have continuity through thermal switch. |
| placement. |
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| 8. Brush cap missing or loose brush lead connec- | 8. | Install brush cap or replace brushes if leads | |
| tions. |
| are damaged. See page 12, Motor Brush Re- | |
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| placement. |
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| 9. Brush length which must be 1/4 in. (6 mm) mini- | 9. Replace brushes. See page 12, Motor Brush | ||
| mum. |
| Replacement. |
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| NOTE: Brushes do not wear at the same rate on |
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| both sides of motor. Check both brushes. |
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| 10.Motor armature commutator for burn spots, | 10. Remove motor and have motor shop resur- | ||
| gouges and extreme roughness. |
| face commutator if possible. See page 25, | |
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| Motor Replacement. |
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| 11. Motor armature for shorts using armature tester | 11. Replace motor. See page 25, Motor Re- | ||
| (growler) or perform spin test, page 12. |
| placement. |
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| 12.Pressure control not plugged in to control board. | 12.Insert pressure control connector into control | ||
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| board. |
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| 309063 | 9 |
