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Troubleshooting
12 311911C
Low air output at gun 4. Damaged (leaking) air supply hose. Replace air supply hose.
5. Air intake filter clogged. Clean or replace air intake filter kit.
6. Mechanical air unloader stuck open. Replace mechanical air unloader.
7. Electrical air unloader stuck open. Replace electrical air unloader.
Air compressor does not run
1. Power/function selector switch
Set function selector switch to AA; replace switch.
2. Voltage to compressor below 105
Vac for 110 - 120 Vac models or
below 210 Vac for 240 Vac models
Try another outlet. Reduce extension cord length or
increase extension cord gauge.
3. Loose power connections Verify all connections are firm.
4. Excessive head pressure (compres-
sor hums)
Moisture frozen in air supply line.
5. Excessive head pressure (compres-
sor hums)
Wait for air pressure to bleed to zero.
6. Excessive head pressure (compres-
sor hums)
Electrical air unloader stuck closed. Replace
electrical air unloader.
7. Excessive head pressure (compres-
sor hums)
Open air regulator (FinishPro 395)
Install air line
Do Startup, Operation Manual 311905
8. Compressor thermal switch is open.
Ensure ambient temperature is
below 115 °F (46 °C).
Move sprayer to shaded, cooler area.
9. Low compressor performance. Worn compressor; repair compressor with
Compressor Service Kit 288723.
Poor air spray pattern
1. Air cap air ports clogged.
Soak in solvent to clean.
2. Air cap worn.
Replace air cap.
3. Worn spray tip.
Relieve pressure, page 7. Replace tip. Refer to gun
instruction manual, 311937.
Water in pattern
1. Water in air line.
Add Water Separator Kit 289535 to air line.
Problem
What To Check
(If check is OK, go to next check)
What To Do
(When check is not OK, refer to this column)