36 ProSpray 22
g
Remedy in case of faults
9. Remedy in case of faults
Unit does not start
Unit does not suck in
Unit sucks, but the
pressure does not
build up
Coating material exits
at the top of the fluid
section
No voltage applied.
Pressure setting too low.
ON/OFF switch defective.
Relief valve is set to SPRAY
(
p
spray).
Filter projects over the fluid
level and sucks air.
Filter clogged.
Suction hose is loose, i.e. the
unit is sucking in outside air.
Tip heavily worn.
Tip too large.
Pressure setting too low.
Filter clogged.
Coating material flows
through the return hose when
the relief valve is in the SPRAY
(
p
spray) position.
Packings sticky or worn.
Valve balls worn.
Valve seats worn.
Upper packing is wor
n.
Piston is wor
n.
Check voltage supply.
Turn up pressure control knob.
Replace
Set relief valve to PRIME (
k circulation).
Refill the coating material.
Clean or replace the filter.
Clean connecting points. Replace O-rings if
necessary. Secure suction hose with retaining clip.
Replace
For selection of a smaller tip, see Tip table on
Page 46.
Turn pressure control knob to a higher number.
Clean or replace the filter.
Remove and clean or replace relief valve.
Remove and clean or replace packings.
Remove and replace valve balls.
Remove and replace valve seats.
Remove and r
eplace packing.
Remove and replace piston.
Type of malfunction Possible cause Measures for eliminating the malfunction
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