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