Graco FinishPro II 295 Mode D'emploi page 54

Basic Troubleshooting
Problem
Motor runs and pump strokes
Motor runs but pump does
not stroke
Motor is hot and runs
intermittently
Low air output at gun
Low air output at gun
Air compressor does not run
54
What To Check
(If check is OK, go to next check)
1. Prime Valve is open or leaking.
2. Paint supply.
3. Intake strainer clogged.
4. Suction tube leaking air.
5. Intake valve ball and outlet ball are
seating properly not worn.
6. Leaking around throat packing nut
which may indicate worn or dam-
aged packings.
7. Pump rod damaged.
8. Gears or drive housing.
1. Be sure ambient temperature where
sprayer is located is not more than
115°F (46°C) and sprayer is not
located in direct sun.
2. Motor has burned windings indicated
by removing positive (red) brush and
seeing burned adjacent commutator
bars.
1. Air valves at gun may be closed.
2. Air connections may be loose.
3. Damaged (leaking) air supply hose.
4. Air intake filter clogged.
1.
Power/function selector switch
2. Voltage to compressor below 105 Vac
for 110 - 120 Vac models or below
210 Vac for 240 Vac models.
3. Loose power connections.
4. Excessive head pressure (compres-
sor hums).
5. Excessive head pressure (compres-
sor hums).
6. Fuse. Check replaceable fuse
on compressor control board.
7. Compressor thermal switch is open.
Ensure ambient temperature is
below 115 °F (46 °C).
8. Low compressor performance.
What To Do
(When check is not OK, refer to this column)
Close or replace Prime Valve, page 90.
Refill and reprime pump.
Remove and clean, then reinstall.
Tighten nut. Check o-rings on swivel tube.
Clean and repair pump, page 87. Strain paint before
using to remove particles that could clog pump.
Replace Pump and Packing module, page 90.
Replace Pump and Packing module, page 90.
Inspect Drive Housing Assembly and gears for
damage and replace if necessary, page 90.
Move sprayer to shaded, cooler area if possible.
Replace Motor, page 49.
Turn air adjustment valve counter-clockwise to open.
Slide air ON/OFF up to open.
Check all connections for leaking air.
Replace air supply hose.
Clean or replace air intake filter.
. Set function selector switch to ON; replace switch.
Try another outlet. Reduce extension cord length
or increase extension cord gauge.
Verify all connections are firm.
Moisture frozen in air supply line.
Wait for air pressure to bleed to zero.
Replace fuse after completing motor inspection,
page 92.
Move sprayer to shaded, cooler area.
Worn compressor; repair compressor with
Compressor Service Kit, page 92.
333114D