Graco FinishPro 256842, Operation Manual

Page: 37 / 70

Basic Troubleshooting /
基本故障排除
/
기본적인 문제 해결
313797C 37
Low Fluid Output 1. Worn or clogged spray tip. Relieve pressure, page 15. Replace or clean tip.
Refer to gun instruction manual, 313347.
2. Verify pump does not continue
to stroke when gun trigger
is released. Service Pump, page 58.
3. Prime valve leaking. Relieve pressure, page 15. Then repair Prime Valve,
page 60.
4. Suction hose connections. Tighten any loose connections. Check o-rings
on suction hose tube.
5. Electric supply with volt meter.
Meter must read 105-130 Vac for
110-120 Vac models and 210-255
for 240 Vac models. Low voltages
reduce sprayer performance. Reset building circuit breaker; replace building fuse.
Repair electrical outlet or try another outlet.
6. Extension cord size and length. Replace with a correct, grounded extension cord,
page 12.
7. Leads from motor to circuit
board for damaged or loose
wire connectors. Inspect wiring
insulation and terminals for
signs of overheating. Be sure male terminal pins are centered and firmly
connected to female terminals. Replace any loose
terminals or damaged wiring. Securely reconnect
terminals.
8. Worn motor brushes which must
be 1/4 in. (6 mm) minimum. Replace Motor, page 33.
9. Motor brushes binding in brush
holders. Clean brush holders. Remove carbon dust by using
compressed air to blow out brush dust.
10. Low stall pressure. Turn pressure
control knob fully clockwise.
Replace Pressure Control Assembly, page 60.
11. Motor armature for shorts
by using an armature tester
(growler) or perform spin test,
page 54.
Replace Motor, page 33.
12. Pump is primed. Prime pump, page 19.
13. Inlet and outlet balls are not
stuck.
Inlet: Remove suction tube and place pencil into inlet
housing to dislodge ball and allow proper priming.
Outlet: Insert screwdriver in slot and remove
Easy-Access door, page 11. Unscrew outlet valve
with a 3/4 in. socket. Remove and clean assembly.
Problem
What To Check
(If check is OK, go to next check)
What To Do
(When check is not OK, refer to this column)