WAGNER U580.00, Translation Of The Original Operating Manual, Page: 31 / 52

31
Unica 4-270
.
OPERATING MANUAL
EDITION 04 /2007 PART NO. ZZB006ENG
Problem Cause Solution
Irregular working
cycle of the pump; in
painting applications
the material jet gives
away (pulsation) • Excessive material viscosity • Dilute working material
• Spraying pressure to low • Increase air inlet pressure, without ever
exceeding the max. value on plate. Use
smaller nozzle.
• Product valves lock • Clean pump fl uid section, if necessary let
the detergent act inside it for some time.
• Foreign body in suction valves • Remove the obstructed suction valves,
clean and check the valve seats.
• Insuffi cient diameter of
compressed air supply pipe
• Mount a pneumatic supply pipe with
larger diameter -> technical data,
paragraph 4.3.2
• Worn valves, seals or diaphragms • Replace the worn components
• Obstructed control air fi lter or
working air fi lter.
• Check fi lters and if necessary clean them
The pump works
regularly but does not
suck the working fl uid • The connections on the suction
system leak and the pump sucks
air
• Tighten the fi ttings and remove leaks
• Obstructed suction fi lter • Clean fi lter
• Obstructed suction valves • Clean the pump fl uid section with
detergent and if necessary let the
detergent act for some time (in case,
purge the device)
Pump runs when the
gun is closed Packings, valves worn Replace parts
Loss of power due to
ice formation in the
pneumatic motor Presence of large quantities of
condensate in the compressed air
supply circuit Install a drier in the compressed air supply
circuit or, if already existinig, check its
performance
Trouble shooting and solution
IMPORTANT:
In all cases where pump parts or pressurized pipes need to be disassembled, follow the
pressure release procedure as described in Paragraph 5.2.2 before performing maintenan-
ce.
If the problem is not listed above consult your WAGNER Service Center.