149
Repairing the pressure regulator
Motor controller card diagnostics
Before performing maintenance work on the controller card, relieve the pressure and unplug the mains plug on the
spraying unit. Read the depressurisation section on chapter 4 for details.
NOTE:
Keep a new pressure sensor handy for this test.
INSTRUCTIONS:
The spraying device must never build up fluid pressure if no pressure sensor is installed. Keep the ventilation/pressure
relief valve open while using the test pressure sensor.
1. Remove the four screws and the cover.
2. Turn the ON/OFF switch to the ON position.
Problem
Cause
Remedy
Coarse, untidy spray
pattern, stripes
Insufficient pressure
Increase pressure
Excessive spray mist
Pressure too high, material is of
too low a viscosity
Reduce pressure, dilute material less
Spray width too large
Nozzle with too large a spraying
angle used
Use a nozzle with a smaller spraying angle
Spray width too nar-
row
Nozzle with too small a spraying
angle used
Use a nozzle with a larger spraying angle
Excessive application
of coating material
Nozzle with too large an opening
used
Material is of too low a viscosity,
pressure is too high
Use a smaller nozzle
Use a smaller nozzle
Reduce pressure
Insufficient application
of coating material
Nozzle too small
Use a larger nozzle
Spray pattern crooked
in the middle
Nozzle worn or incorrect nozzle
used
Insert a new nozzle or use a nozzle with a narrower
spray width
Excessive layer thick-
ness with "skin forma-
tion"
Excessive material viscosity
Reduce viscosity of material, use a smaller nozzle
Elevations where the
spray pattern overlaps
Excessive material viscosity
Reduce material viscosity
Non-targeted and une-
ven spray pattern
Nozzle clogged or defective
Clean nozzle carefully or replace
Clogged filter
Contaminated coating material,
solid particles in the coating mate-
rial
Clean the filter, insert a coarser filter if permitted by
the size of the nozzle
Accumulations of
paint on the nozzle
holder
Insufficient distance from the coa-
ting surface, pressure is too high
Increase the distance, reduce the pressure
Formation of drops at
the nozzle outlet
Nozzle needle and / or seat is
defective or worn
Replace the needle and seat
Nozzle clogs frequent-
ly
Contaminated coating material,
no gun filter or too coarse a filter
used
Sift the coating material, insert a (coarser) gun filter
Poor spray pattern
Original instruction
Summary of Contents for Airless SL 1200 S
Page 1: ...Airless SL 1200 S DE NL FR IT GB CZ...
Page 26: ...26 Ersatzteilliste Motor Getriebe Anbauteile bersetzung der Originalanleitung...
Page 28: ...28 Ersatzteilliste Farbstufe bersetzung der Originalanleitung...
Page 60: ...60 Lijst met vervangende onderdelen Verftrap Vertaling van de originele handleiding...
Page 90: ...90 Nomenclature Moteur transmission pi ces ajout es Traduction des instructions d origine...
Page 92: ...92 Nomenclature Etape color e Traduction des instructions d origine...
Page 124: ...124 Elenco dei pezzi di ricambio Stadio di colore Traduzione delle istruzioni originali...
Page 154: ...154 List of spare parts Motor gear unit attachment parts Original instruction...
Page 156: ...156 List of spare parts Paint level Original instruction...
Page 186: ...186 Seznam n hradn ch d l Motor p evodovka d ly k namontov n P eklad origin lu n vodu...
Page 188: ...188 Seznam n hradn ch d l Barevn stupe P eklad origin lu n vodu...
Page 194: ...194...
Page 195: ...195...