Graco XM PFP Setup & Operation page 65

Problem
Poor spray pattern.
Also, see "System runs erratically" below.
System runs erratically.
Air supply relief valve opens.
Flow rate too low.
Receive ratio alarm after starting in spray
mode while using remote mix manifold.
Receive ratio alarm while using remote
mix manifold after a significant change in
pressure.
3A2776K
Cause
Fluid pressure too low.
Fluid temperature too low.
Spray tip dirty or worn.
Mix manifold, mixer, swivel, gun, or hoses
partially plugged or too restrictive.
Air filter(s) clogged.
Air supply hoses undersized.
Air compressor undersized.
Air supply pressure tank undersized.
Inlet air pressure gauge drops below 50
psi (0.35 MPa, 3.5 bar) while spraying.
A and/or B air motor has ice.
Metering pump is binding.
Air regulator set too high.
Air supply hose is too small or too long.
Inadequate air supply.
Air pressure to metering pumps too low.
Spray tip too small.
Mix manifold, mixer, swivel, gun, or hoses
partially plugged or too restrictive.
A and B hoses do not fill to correct pres-
sure ratio simultaneously. Therefore,
spray time increases in order to balance
pressure. Ratio screen bar graph stays to
one side until pressure balances.
A and B hoses do not fill to correct pres-
sure ratio simultaneously. Therefore,
spray time increases in order to balance
pressure. Ratio screen bar graph stays to
one side until pressure balances.
Troubleshooting Information
Solution
Increase metering pump pressure.
Increase fluid temperature.
Relieve pressure. Clean or replace tip.
Follow gun manual instructions.
Inspect parts for cured material. Clean or
replace, or use larger hoses and mixer.
Clean. Replace element(s).
Replace hoses with appropriate size.
Use larger air compressor.
Use larger pressure tank.
See solutions above for system runs
erratically problem.
Open air motor de-ice bleed air control.
Allow ice to melt. Dry the compressed air.
Heat the compressed air. Use a smaller
tip and lower flow rate.
Repair lower. See XM PFP repair man-
ual.
Lower setting.
Use 3/4 in. minimum ID air supply hose.
See Technical Specifications, page 98.
Use larger CFM compressor.
Increase metering pump air pressure.
Relieve pressure. Install larger tip. Follow
gun manual instructions.
Inspect parts for cured material. Clean or
replace, or use larger hoses and mixer.
Pressurize outlet hoses in manual A/B
pump mode. Then start spray mode.
Select correct hose size to balance your
volume ratio. See XM PFP Mix Manifold
manual.
Pressurize outlet hoses in manual A/B
pump mode. Then start spray mode.
Select correct hose size to balance your
volume ratio. See XM PFP Mix Manifold
manual.
Change pressure slowly while spraying.
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