Troubleshooting
WARNING
INJECTION HAZARD
To reduce the risk of serious injury, whenever you are instructed to relieve pressure, follow the Pres- sure Relief Procedure on page 9.
Basic Problem Solving
Check everything in the troubleshooting table before disassembling the sprayer.
TYPE OF PROBLEM
Fluid pressure
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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1. | Check pressure control knob setting. The pump | 1. | Slowly increase pressure setting to see if |
| won't develop much pressure if it is at minimum |
| motor starts. |
| setting (fully counterclockwise). |
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2. | Check for a clogged spray tip or fluid filter, if | 2. | If tip is still clogged, relieve pressure; re- |
| used. See page 8. |
| fer to separate gun or tip instruction man- |
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| ual for tip cleaning. Clean the filter, if |
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| used. |
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Mechanical
1.Check for frozen or hardened paint in pump (20). Using a screwdriver, carefully try to rotate fan at back of motor by hand. See page 17.
2.Check pump connecting rod pin (17). It must be completely pushed into connecting rod (15), and retaining spring (18) must be firmly in con- necting rod groove. See Fig. 18, page 21.
1.Thaw. Plug in sprayer and turn on. Slowly increase pressure setting to see if motor starts. If it doesn't, see NOTE, be- low.
2.Push pin into place and secure with spring retainer.
Electrical
3.Check for motor damage. Remove drive hous- ing assembly (11). See page 24. Try to rotate motor fan by hand.
1.Check electrical supply with volt meter. Meter should read 105±125 VAC.
2.Check extension cord for visible damage. Use a volt meter or test lamp at extension cord out- let to check.
3.Replace motor (4) if fan won't turn. See page 22.
1.Reset building circuit breaker; replace building fuse. Try another outlet.
2.Replace extension cord.
3.Check sprayer power supply cord (50) for vis- ible damage such as broken insulation or wires.
4.Check motor brushes for the following:
a.Loose terminal screws.
b.Broken or misaligned brush springs.
c.Brushes binding in holders.
d.Broken leads.
e.Worn brushes.
NOTE: The brushes do not wear at same rate on both sides of motor. Check both brushes.
3.Replace power supply cord. See page 23.
4.Refer to page 19.
a.Tighten.
b.Replace broken spring and/or align spring with brush
c.Clean brush holders. Remove carbon with small cleaning brush. Align brush leads with slot in brush holder to as- sure free vertical brush movement.
d.Replace brushes
e.Replace brushes if less than 0.5 in. long.
NOTE: Thaw sprayer if water or water±based paint has frozen in it, due to exposure to low temperatures, by placing in a warm area. Do not try to start sprayer until completely thawed or damage to motor and/or start board may occur. If paint hardened (dried) in sprayer, the pump packings (page 21) and/or pressure transducer (page 27) must be replaced.
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