ProSpray 3.21
13
GB
Remedy in case of faults
Type of malfunction
A. Unit does not start
B. Unit does not draw in material
C. Unit draws in material, but the
pressure does not build up
D. Coating material exits at the top of
the fluid section
E. Increased pulsation at the spray
gun
F. Poor spray pattern
G. Unit loses power
Possible cause
1. No voltage applied.
2. Pressure setting too low.
3. ON/OFF switch defective.
1. Relief valve is set to SPRAY (
p
spray).
2. Filter projects over the fluid level and
sucks air.
3. Filter clogged.
4. Suction hose/suction tube is loose, i.e.
the unit is sucking in outside air.
1. Tip heavily worn.
2. Tip too large.
3. Pressure setting too low.
4. Filter clogged.
5. Coating material flows through the
return hose when the relief valve is in
the SPRAY (
p
spray) position.
6. Packings sticky or worn.
7. Valve balls worn.
8. Valve seats worn.
1. Upper packing is worn.
2. Piston is worn.
1. Incorrect high-pressure hose type.
2. Tip worn or too large.
3. Pressure too high.
1. Tip is too large for the coating
material which is to be sprayed.
2. Pressure setting incorrect.
3. Volume too low.
4. Coating material viscosity too high.
1. Pressure setting too low.
Measures for eliminating the malfunction
1. Check voltage supply.
2. Turn up pressure control knob.
3. Replace.
1. Set relief valve to PRIME (
k
circulation).
2. Refill the coating material.
3. Clean or replace the filter.
4. Clean connecting points. Replace O-rings if necessary.
Secure suction hose with retaining clip.
1. Replace
2. For selection of a smaller tip, see Tip table on Page 18.
3. Turn pressure control knob clockwise to increase.
4. Clean or replace the filter.
5. Remove and clean or replace relief valve.
6. Remove and clean or replace packings.
7. Remove and replace valve balls.
8. Remove and replace valve seats.
1. Remove and replace packing.
2. Remove and replace piston.
1. Only use WAGNER original-high-pressure hoses in order
to ensure functionality, safety and durability.
2. Replace tip.
3. Turn pressure control knob to a lower number.
1. Replace tip, see Tip table on Page 18.
2. Turn pressure control knob until a satisfactory spraying
pattern is achieved.
3. Clean or replace all filters.
4. Thin out according to the manufacturer’s instructions.
1. Turn pressure control knob clockwise to increase.
9.
Remedy in case of faults
