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12. Troubleshooting Guide
Faults
Irregular paint spray
Paint not fluid enough
when leaving spray
gun
Paint flows out
continuously
Paint comes out of air
cap air holes
Poor spraying quality
Orange peel effect
Index revision : C - March 2016
Possible causes
Air in paint circuit
Paint flow too low
Impurities in circuit
Paint tank empty (or nearly)
Paint viscosity too high
Blocked nozzle/tip
Needle does not retract
Clogged filter
Insufficient pump pressure
Paint viscosity too high
Dia 6.35 mm paint hose clogged
Needle is obstructed and cannot
close
Worn needle
Nozzle/tip holder damaged
Nozzle/tip insufficiently tightened
against seat
Damaged cartridge
Damaged paint seal
Nozzle/tip partially blocked
Paint flow too weak
Viscosity too high
Insufficient air for spraying
Paint flow too high
Paint injector damaged
Solvents evaporating too quickly
Paint droplets too large
Dump the paint circuit
Increase pressure in pump or
pressure tank
Check filter, then drain circuit
Refill paint tank
Check paint viscosity
Clean nozzle/tip
Check needle assembly
Clean filter
Check pump
Check paint viscosity
Unblock or replace paint hose
Remove nozzle/tip holder and clean
holder and seat. Clean needle tip
Replace needle and, if necessary,
the nozzle/tip holder
Replace nozzle/tip holder
Tighten nozzle/tip
Replace cartridge
Replace seal
Clean nozzle/tip
Increase paint flow
Dilute paint
Increase air pressure
Reduce paint flow
Replace the injector
Use heavier solvents
Increase spraying distance
Dilute paint
Increase spraying air pressure
Decrease nozzle/tip size
Increase the electrostatic effect
47
Remedies
7105
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