Troubleshooting
Troubleshooting
Problem | Cause | Solution |
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Sprayer won’t run | Power switch not on | Turn switch on. |
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| No power at wall outlet | Check outlet by plugging in another |
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| appliance. If appliance does not |
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| work, try another outlet. |
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| Wrong size generator | Use a 3500 watt or larger generator. |
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| Refer to Generator Requirements, |
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| page 6. |
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| Breaker tripped | Reset breaker. |
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Pump won’t pump material | Air lock | Open air valve on gun. |
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| Selector switch in wrong position | Move selector switch to correct posi- |
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| tion for application. |
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| Mix too thick | Add water to thin material. Use Mate- |
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| rial Thickness Gauge. |
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| Loose fittings | Check and retighten all fittings. |
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| Plugged gun | Relieve Pressure, page 6. Remove |
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| gun from hose. Clean gun. |
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| Pump hose worn out | Replace hose. Recommended hose |
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| replacement - once every year. |
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| Pump cold | Move pump to warm room and allow |
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| it to warm up or run hot water through |
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| sprayer. |
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Material runs out of bottom of sprayer | Pump hose worn out | Replace hose. |
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| Loose fittings | Check and retighten all fittings. |
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No air from compressor | Gun air valve closed | Open gun air valve. |
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| Low voltage | Check extension cord length and |
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| gauge. Replace if different than rec- |
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| ommended. Refer to Grounding and |
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| Electrical Requirements, page 6. |
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| Gun needle plugged | Clean needle and retry. |
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| Worn compressor | Replace compressor. Contact a qual- |
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| ified Graco Service Center. |
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| Lines not connected | Check all quick disconnect connec- |
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| tions to gun and hoses. |
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| Damaged hose | Replace hose. |
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311772G | 25 |
