Troubleshooting - Graco 16N661 Operation - Repair - Parts

Troubleshooting

This equipment stays pressurized until pressure is
manually relieved. To help prevent serious injury from
pressurized fluid, such as skin injection, splashing fluid
and moving parts, follow the Pressure Relief
Procedure when you stop spraying and before
cleaning, checking, or servicing the equipment.
Problem
Sprayer makes no sound when
trigger is pulled
Sprayer makes sound but no material is
sprayed when trigger is pulled
3A2854G
Cause
Trigger is locked.
Power supply.
Motor has overheated.
Sprayer circuit breaker has interrupted power.
Sprayer is not primed.
Prime/spray valve is in UP position.
Flexible suction tube is missing or improperly
installed.
Flexible suction tube strainer or vent valve or
vent holes are clogged.
Flexible suction tube o-rings are damaged or
missing.
Flexible suction tube damaged.
Spray tip is not in SPRAY position.
Spray tip is clogged.
Spray tip filter is clogged.
Pressure control knob is too low.
Sprayer has been tilted too far and suction tube
has lost contact with material.
No or low material in material cup.
Inlet valve is stuck from material
residue left in sprayer.
Pump is clogged, frozen, or has debris inside.
Material is leaking from hole in front of sprayer. Replace needle assembly.
Check everything in this Troubleshooting Table before
you bring the sprayer to an authorized service center.
Disengage trigger lock. See page 8.
Verify power to sprayer.
Wait 20-30 minutes for motor to cool.
Push and hold Circuit Reset Button (page 6) to
restore power to sprayer.
Prime the pump. See Starting a New Job (or Refill-
ing the Material Cup), page 11.
Use pump access armor storage/startup tool to clear
pump of debris. See Storage, page 17.
Clean air vent holes or the air vent valve as your
model is equipped. See Shutdown and Cleaning,
page 15.
Put valve DOWN to spray position.
Make sure flexible suction tube is properly installed.
See Shutdown and Cleaning, page 15.
Replace flexible suction tube o-rings.
Replace flexible suction tube.
Turn spray tip to SPRAY position.
See Unclogging Spray Tip/Guard
Assembly, page 14.
Remove and clean spray tip filter. See Unclogging
Spray Tip/Guard Assembly, page 14.
Turn pressure control knob up.
Make sure material cup is filled with material. Rotate
flexible suction tube, page 9. Do not tilt the material
cup too far. Prime the pump. See Starting a new
Job (or Refilling the Material Cup), page 11.
Refill material cup with material and prime the pump.
Use pump access armor storage/startup tool to clear
pump of debris. See Storage, page 17. If unsuc-
cessful, see Inlet Valve Removal/Service, page 22.
See Outlet Valve Fitting Repair, page 23 and Inlet
Valve Removal/Service, page 22.
Troubleshooting
Solution
25