Graco Inc. CED1 Manual De Usuario

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Cleanup
3A0245A
15
Troubleshooting
Low or Fluctuating Output
Electrical Short
PROBLEM
CAUSE
SOLUTION
Motor runs and pump strokes
1.
Material supply.
1.
Refill hopper and re-prime pump.
2.
Loose fittings.
2.
Tighten; use thread sealant or 
sealing tape on threads if neces-
sary.
3.
Intake valve ball and piston ball are 
seating 
properly.
3.
Remove intake and piston valves 
and clean. Check balls and seats 
for nicks or obstructions; replace 
if necessary, page 18. Clean 
hopper before using to remove 
particles that could clog pump.
4.
Leaking around throat packing nut 
which may indicate worn or damaged 
packings.
4.
Replace packing, page 18. Also 
check piston valve seat for hard-
ened paint or nicks and replace if 
necessary.
5.
Pump rod damage.
5.
Repair pump.
Motor runs but pump does not 
stroke
1.
Displacement pump pin (75) (damaged 
or missing).
1.
Replace pump pin if missing. Be 
sure retainer spring (76) is fully in 
groove all around connecting rod.
2.
Connecting rod assembly (45) for dam-
age.
2.
Replace connecting rod assem-
bly.
3.
 Gears or drive housing.
3.
Inspect drive housing assembly 
and gears for damage and 
replace if 
necessary.
PROBLEM
CAUSE
SOLUTION
Building circuit breaker opens 
as soon as sprayer switch is 
turned on.
CAUTION 
Any short in any part of the 
motor power circuit will cause 
the control circuit to inhibit 
sprayer operation. Correctly 
diagnose and repair all shorts 
before checking and replacing 
control board. 
1.
All electrical wiring for damaged insula-
tion, and all terminals for loose fit or 
damage. Also wires between pressure 
control and motor. 
1.
Repair or replace any damaged 
wiring or terminals. Securely 
reconnect all wires.
2.
Motor armature for shorts. Inspect 
windings for burns
2.
Replace motor.
3.
Motor control board by performing 
motor control board diagnostics. If 
diagnostics indicate, substitute with a 
good board.
3.
Replace with a new pressure 
control board.