Erratic Motor Operation - Graco Magnum L10 Repair Manual

Advanced Troubleshooting
Specific Problem
Sprayer quits after running for
5 to 10 minutes.
24

Erratic Motor Operation

Cause
Building circuit is overloaded.
Electrical outlet supplying
wrong voltage.
Also see Basic Electrical Problems and Sprayer Wiring Problems, pages 21 - 22.
Motor is overheating.
Warning: See Thermal
Overload, page 12.
Solution
Remove other loads from building circuit or find
another circuit that has less load. See Grounding
and Electrical Requirements, page 12.
Try another outlet. Check electric supply with volt
meter. Meter must read 220-240 VAC. If voltage is
too high, do not use outlet until corrected.
After motor cools, operate sprayer and determine
if motor stops when trigger on gun is released. If
sprayer runs continuously, replace Pressure
Control. See List of Kits, page 30.
Relieve pressure and remove motor enclosure.
Turn motor fan by hand to check for binding gears
or seized pump. See List of Kits, page 30.
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