Basic Troubleshooting / 基本故障排除 / 기본적인 문제 해결

Problem

 

What To Check

What To Do

(If check is OK, go to next check)

(When check is not OK, refer to this column)

 

 

 

 

 

 

 

 

Basic Electrical

1.

Electric supply. Meter must read

Reset building circuit breaker, replace building fuses.

See wiring diagram, page 63

 

105-130 Vac for 110-120 Vac mod-

Try another outlet.

 

 

els and 210-255 Vac for 230 Vac

 

 

 

models.

 

 

 

 

 

 

2.

Extension cord. Check extension

Replace extension cord. Use shorter extension cord.

 

 

cord continuity with volt meter.

 

 

 

 

 

 

3.

Sprayer power supply cord.

Replace power supply cord. See page 60.

 

 

Inspect for damage such as broken

 

 

 

insulation or wires.

 

 

 

 

 

 

4.

Fuse. Check replaceable fuse on

Replace fuse after completing motor inspection.

 

 

control board (next to ON/OFF

See page 62.

 

 

switch).

 

 

 

 

 

 

5.

Motor leads are securely fastened

Replace loose terminals; crimp to leads.

 

 

and properly connected to control

Be sure terminals are firmly connected.

 

 

board.

Clean circuit board terminals. Securely reconnect

 

 

 

 

 

 

leads.

 

 

 

 

 

6.

Motor thermal switch. Yellow

Replace Motor, page 60.

 

 

motor leads must have continuity

 

 

 

through thermal switch.

 

 

 

 

 

 

7.

Brush cap missing or loose brush

Replace Motor, page 60.

 

 

lead connections. Brush length

 

 

 

must be 1/4 in. (6mm).

 

 

 

 

 

 

8.

Motor armature commutator for

Replace Motor, page 60.

 

 

burn spots, gouges and extreme

 

 

 

roughness.

 

 

 

 

 

 

9.

Motor armature for shorts using

Replace Motor, page 60.

 

 

armature tester (growler) or per-

 

 

 

form spin test, page 54.

 

 

 

 

 

 

10.

Pressure control not plugged in

Insert pressure control connector into control board.

 

 

to control board.

 

 

 

 

 

36

313797C

Page 36
Image 36
Graco Inc 290, 313797C important safety instructions See wiring diagram