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VERSION 04/2018
OPERATING MANUAL
9
TROUBLESHOOTING AND RECTIFICATION
Problem
The pump does not work. Air motor does not work or stops.
Poor spray pattern.
Irregular pump operation:
spray jet collapses
(pulsation).
Highly irregular operation
of the pump.
The pump runs evenly,
does not however, suck up
product.
Pump runs fast when the
spray gun is closed.
Loss of power due to
severe icing.
If none of the causes of malfunction mentioned are present, the defect can be remedied
by a WAGNER Service Center.
ORDER NUMBER DOC 2349980
Cause
No pressure indication on the
pressure gauge (air pressure regulator
defective).
Spray nozzle is clogged.
Insufficient compressed air supply.
Filter insert in spray gun or high-
pressure filter is clogged.
The fluid section or high-pressure hose
is blocked (e.g., the 2K product has
hardened).
Grease in spool and sleeve assembly.
Occasionally, the pump stops at the
reversal point.
See spray gun instructions.
Viscosity is too high.
Spraying pressure is too low.
Valves are clogged.
Foreign body in suction valve.
Diameter of compressed air line too
small.
Valves, packings, or pistons are worn
out.
Control air filter or work air filter is
clogged.
Diaphragms "blocked" because
suction is too fast.
The suction system's union nut is
loose; the pump is taking in air.
Suction filter is clogged.
Valves are clogged.
Valves worn.
There is a lot of condensation water in
the air supply.
Cobra 40-10 / 2K
Remedy
Open and close ball valve on the
pressure regulator unit or briefly
disconnect compressed air supply.
Disconnect compressed air supply
briefly or repair or change pressure
regulator.
Clean the nozzle according to the
instructions.
Check compressed air supply.
Clean the parts and use suitable
product.
Dismount and clean fluid section,
replace high-pressure hose.
Degrease spool and sleeve assembly.
Check detent body.
Thin product.
Increase incoming air pressure.
Use a smaller nozzle.
Press valve depressor.
Clean pump. If necessary, leave it to
soak in cleaning agent.
Dismantle suction valve housing, clean
and check valve seat.
Assemble a larger supply line
Technical data, see Chapter 5.5.2.
Replace the parts.
Check and clean it if necessary.
Operate pump with ball valve opened a
minimal amount for a while.
Tighten.
Clean filter.
Press valve depressor.
Clean pump. If necessary, leave it to
soak in cleaning agent.
Replace the parts.
Install a water separator.
46
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