WAGNER U580.00, Translation Of The Original Operating Manual, Page: 30 / 52

30
Unica 4-270
.
OPERATING MANUAL
EDITION 04 /2007 PART NO. ZZB006ENG
6
FAULT LOCATION, MAINTENANCE AND REPAIR
6.1
TROUBLE SHOOTING AND SOLUTION
Problem Cause Solution
The pump does not
work • Air motor does not work or stops • Open and close ball valve on the pressure
regulator unit or disconnect compressed
air supply shortly
• No pressure indication (pressure
regulator defect)
• Disconnect the compressed air supply
for a short time or repair or replace the
pressure controller.
• In painting applications,
obstruction of the spraying
nozzle
• Clean nozzle as laid down in the
instructions
• Insuffi cient supply of compressed
air
• Overhaul the pneumatic delivery plant
• In painting applications,
obstruction of the cartidge fi lter
inside spray gun or of the high-
pressure fi lter
• Clean the parts and use a suitable
working material
• Obstruction of the pump fl uid
section or of the high-pressure
pipes (for example, hardened
products inside the delivery
pipes) • Dismantle the pump and clean, replace
high-pressure hose
• Lack/excess of grease inside
the reversing valve spool (the
pneumatic motor stops at end
stroke)
• Grease/remove grease in excess. Check
the reversing valve body.
In painting
applications,
unsatisfactory
spraying quality • Please see instructions for use of the spraying device (for example, a spraygun)
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 mainte-
nance.