Original Operation Manual
12-1
•1307_PU280_SV1018DV1020_BAoDB_en•ski
en
12 Malfunctions and Troubleshooting
12.1 General troubleshooting
Fault
Possible cause
Remedy
1. The equipment does not start.
➤
Energy supply interrupted (no
compressed air, no electric power
supply).
➤
Master switch in position “OFF”.
➤
Equipment not switched on.
➤
Ensure compressed air and elec
-
tric power supply
➤
Switch the master switch to “ON”.
➤
Switch on the equipment.
2. The feed pumps work without
interruption, no material comes
out of the spray gun.
➤
The material drum is empty.
➤
The intake is defective
a
a pump draws in air.
➤
The intake screen is clogged.
➤
Material feed pump(s) is (are)
defective.
➤
Replace the material drum.
➤
Replace the intake.
➤
Clean or replace the intake
screen.
➤
Repair the feed pump(s).
3. The feed pump does not deliver
any material into the dual compo
-
nent system.
➤
The dirt trap before the mate
-
rial inlet on the dual component
system is soiled.
➤
Clean the dirt trap of the dual
component system.
4. No pressure built up by a pump
during downwards stroke of me
-
tering pump. The pressure of the
other components rises.
➤
The bottom valve of the pump
without pressure is soiled or
defective.
➤
Disassemble and clean the bot
-
tom valve.
➤
Replace defective ball or valve
plate.
5. No pressure built up by a pump
during upwards stroke of meter
-
ing pump.
➤
The piston valve of the pump
without pressure is leaking.
➤
Disassemble and clean the piston
valve.
➤
Replace defective ball or valve
plate.
6. A pump does not generate pres
-
sure in up and down stroke.
The pressure of the other compo
-
nent is very high.
➤
The pump without pressure does
not receive any material.
➤
Both valves soiled or defective.
➤
Check the material supply.
➤
Check the valves.
7. When venting, the pressure of
one component remains applied.
The pressure of the other compo
-
nent drops.
➤
Return flow hoses (optional),
material hose or spray gun are
clogged.
➤
Check return flow hose (optional)
and material hoses for free flow.
➤
Check the valves.
8. When spraying the pressure of a
component always increases in
comparison with the other com
-
ponent.
➤
The packings in the pump without
pressure start leaking.
➤
Filter in spray gun clogged
➤
Mixing chamber clogged.
➤
Repair the pump without pressure
(renew the packings).
➤
Clean the filter.
➤
Clean the mixing chamber.
9. When spraying not enough pres
-
sure or material is transferred to
the spray gun, even though the
pressure in the system is high
enough.
➤
Material hose or spray gun
blocked by deposit growth.
➤
The mixing chamber in the spray
gun is clogged.
➤
Clean or replace material hoses
and spray gun.
➤
Replace the mixing chamber in
the spray gun.
10. Compressed air escaping from
the air motor at the guide axes.
➤
The air motor seals are worn.
➤
Seal the air motor.
Summary of Contents for DUOMIX PU280
Page 68: ......