15
EN
ProSpray 3.20
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
H. Pump over-pressurizes and
will not shut off.
Possible cause
1. No voltage applied.
2. Pressure setting too low.
3. ON/OFF switch defective.
1. Relief valve is set to SPRAY (
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 (
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.
1. Pressure switch defective.
2. Transducer defective.
Measures for eliminating the malfunction
1. Check voltage supply.
2. Turn up pressure control knob.
3. Replace.
1. Set relief valve to PRIME (
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. Replace tip.
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.
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.
1. Take unit to a Wagner authorized service center.
2. Take unit to a Wagner authorized service center.
10
REMEDY IN CASE OF FAULTS
Summary of Contents for PROSPRAY 3.20
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