Fault Location, Maintenance And Repair; Troubleshooting And Solution - WAGNER Unica 4-270 Translation Of The Original Operating Manual

EDITION 09 /2015
OPERATING MANUAL
6

FAULT LOCATION, MAINTENANCE AND REPAIR

6.1

TROUBLESHOOTING AND SOLUTION

Problem
The pump does not
work
In painting
applications,
unsatisfactory
spraying quality
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.
PART NO. ZZB028ENG
Cause
• Air motor does not work or stops
• No pressure indication (pressure
regulator defect)
• In painting applications,
obstruction of the spraying
nozzle
• Insuffi cient supply of compressed
air
• In painting applications,
obstruction of the cartidge fi lter
inside spray gun or of the high-
pressure fi lter
• Obstruction of the pump fl uid
section or of the high-pressure
pipes (for example, hardened
products inside the delivery
pipes)
• Excess of grease or dirt inside
the reversing valve spool (the
pneumatic motor stops at end
stroke)
• Please see instructions for use of the spraying device (for example, a spraygun)
Unica 4-270 N
Solution
• Open and close the ball valve on the
pressure regulator unit or disconnect
compressed air supply for a short time
• Disconnect the compressed air supply
for a short time or repair or replace the
pressure controller.
• Clean nozzle as laid down in the
instructions
• Overhaul the pneumatic delivery plant
• Clean the parts and use a suitable
working material
• Dismantle the pump and clean, replace
high-pressure hose
• Remove dirt or grease in excess. Check
the reversing valve body.
.
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