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Advanced Troubleshooting
General Problem: Motor Operation is Erratic
SPECIFIC PROBLEM CAUSE SOLUTION
Sprayer quits after running for 5 to 10 minutes. Electrical outlet is damaged or
supplying the wrong voltage.
Reset building circuit breaker or
replace building fuse. Try another
outlet.
Check electric supply with volt meter
Check electric supply with volt meter.
Meter must read 85 to 130V AC. If
voltage is too high, do not use outlet
until corrected.
See also “Basic Electrical Problems” on page 24 and “Sprayer Wiring
Problems” on page 25.
Motor is hot and runs intermittently.
NOTE: This is a thermal overload condition.
Motor automatically shuts off due to excessive
heat.
See Startup Hazard After Thermal Overload
in the WARNINGS section on page 2.
Damage can occur if cause is not corrected.
See Basic Troubleshooting page 23.
General Problem: Output is Low or Fluctuating
SPECIFIC PROBLEM CAUSE SOLUTION
Pump cycles, but output is low
or surging.
See Basic Troubleshooting page 22.
Pump valves are worn or obstructed by debris. Check for worn pump valves as follows:
Prime sprayer with paint. Trigger spray gun
momentarily. When spray gun trigger is
released, pump should cycle momentarily
and stop. If pump continues to cycle, pump
valves may be worn or obstructed.
See Pump Service on page 33.
Spray–Prime/Drain valve is leaking. Check Spray–Prime/Drain valve for debris
trapped on seat and for worn parts. Torque to
185 in-lb (21 NSm). Replace if parts are worn
using Spray–Prime/Drain Valve Kit 235014
(see List of Kits, page 31).
Voltage from electrical outlet is too low. Low
voltages reduce sprayer performance.
Check voltage of outlet. Meter must read
85 to 130V AC.
Reset building circuit breaker or replace
building fuse.
Repair electrical outlet or try another outlet.
Extension cord is too long or not a heavy enough
gauge.
Replace extension cord.
See Grounding and Electrical
Requirements on page 4.
Leads from motor to control board are damaged,
loose, or overheated.
Be sure terminals are centered and firmly
connected. Inspect wiring insulation and
terminals for signs of overheating, and
replace any loose terminals or damaged
wiring. Securely reconnect terminals.
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