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7. Troubleshooting
Error
LEDs (5, 6, 7, Fig. 1) do
not light, pressure discs
will not move.
The unit does not switch
on.
Pressure discs will not
move, "Unit cover" LED
(7, Fig. 1) is on or flashes.
Cartridges cannot be
removed / cannot be
installed.
A loud sound can be
heard when the mixer
shaft threads itself into
the mixing nozzle.
Mixing nozzle (21, Fig. 1)
does not turn.
Unit automatically reduces
the Extrusion speed.
The mixing nozzle bursts
(21, Fig. 1).
The tubular bag bursts or
is damaged.
Advance stops for no
apparent reason and the
unit performs a short relief
stroke.
Advance stops for no
apparent reason and the
pressure discs return to
their home position.
The mixing program LEDs
are flashing while the unit
cover is open.
Cause
•
The unit is not switched on.
•
Power cord not properly connected to
the unit.
•
Fuse blown.
•
No power at the wall outlet.
•
Unit fault.
•
Unit cover not properly closed.
•
Pressure discs have not fully retract-
ed to their home position.
•
A spring pushes the mixer shaft
forward until it reaches a stop.
•
The mixer shaft has not threaded
itself.
•
Material has hardened in the mixing
nozzle.
•
Unit detects a highly viscous im-
pression material and automatically
reduces the feed rate and mixer
rotary speed.
•
Contamination (e.g. debris) in the
cartridge holder.
• Insufficient spindle lubrication.
•
The pause time was not observed.
•
Incorrect mixing nozzle installed.
•
Mixing tip/ foil bag not compatible.
•
Pressure discs are too worn or have
been damaged, causing the tubular
bag to be pinched between the pres-
sure disc and the cartridge.
•
The material has partially hardened
in the cartridge.
•
Material has hardened in the car-
tridge.
•
The controller has detected an over-
load.
•
Material has hardened in the car-
tridge.
• Insufficient spindle lubrication.
•
No mixing program is selected.
Corrective action
•
Switch the unit on at the main power switch (16, Fig. 1).
•
Check that the unit plug is properly seated (Fig. 2).
•
Replace the fuse (refer to Sec. 6.5).
•
Check that there is power at the wall outlet.
•
Return the unit for repair.
•
Close the unit cover (8, Fig. 1) and check that the car-
tridges are properly seated. If required, seat cartridges
correctly.
•
Press the retract key (4, Fig. 1) and allow the pressure
discs to retract until they stop automatically. They are now
in their home position (refer to Sec. 5.1).
•
This is perfectly normal and requires no intervention.
•
Only install the mixing nozzle subsequently.
•
Check that the cartridge is properly seated.
•
Install a new nozzle.
•
This only occurs if the material is highly viscose or is
cold. Refer to the manufacturer's processing instructions
(processing temperature).
•
Clean the inner surfaces of the cartridge holder and pres-
sure plate.
•
Lubricate the spindles (special grease!).
•
At least 5min intermission.
• Use the mixing nozzle specified by the manufacturer.
•
Contact the manufacturer of the mixing tip / foil bag.
•
Replace the pressure discs (refer to Sec. 6.3).
•
Replace the cartridge (refer to Sec. 5.1).
•
Use new mixing nozzle.
•
Impression material is too cold, Refer to the manufactur-
er's processing instructions.
•
Use a new cartridge.
•
Lubricate the spindles (special grease!).
•
Select the correct mixing program for the casting material
(see section 5.1.1).
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