Renfert 276100 0000, Manual

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6.5 Spare Parts
You can find components subject to wear and the spare parts on the spare
part list in the internet at www.renfert.com/p918 �
Enter the following item number: 2761000000�
The components excluded from the warranty (such as consumables or
parts subject to wear and tear) are marked on the spare part list� Serial
number and date of manufacturing are shown on the type plate of the unit�
7 Troubleshooting
Error Cause Corrective action
LEDs (5, 6, 7, Fig. 1) do
not light, pressure discs
will not move.
• The unit is not switched on� • Switch the unit on at the main power switch (16,
Fig� 1)�
The unit does not
switch on.
• Power cord not properly connected to
the unit�
• Fuse blown�
• No power at the wall outlet�
• Unit fault�
• Check that the unit plug is properly seated (Fig� 2)�
• Replace the fuse (refer to Sec� 6�4)�
• Check that there is power at the wall outlet�
• Return the unit for repair�
Pressure discs will not
move, ”Unit cover” LED
(7, Fig. 1) is on or flash -
es.
• Unit cover not properly closed� • Close the unit cover (8, Fig� 1) and check that the
cartridges are properly seated� If required, seat car-
tridges correctly�
Pressure plates move
very slowly towards the
cartridge.
• The cover was opened before the
pressure plates stopped� A previous
cartridge position has been saved�
• Press retract key (4, Fig� 1) and wait until the pres-
sure plates have reached their home position and
have come to a complete stop� Then repeat the pro-
cess with the cartridge�
Cartridges cannot be re-
moved / cannot be in-
stalled.
• Pressure discs have not fully retracted
to their home position�
• Press the retract key (4, Fig� 1) and allow the pres-
sure discs to retract until they stop automatically� They
are now in their home position (refer to Sec� 5�1)�
A loud sound can be
heard when the mixer
shaft threads itself into
the mixing nozzle.
• A spring pushes the mixer shaft for-
ward until it reaches a stop�
• This is perfectly normal and requires no intervention�
• Only install the mixing nozzle subsequently�
Mixing nozzle (21,
Fig. 1) is not turning.
• The mixer shaft has not threaded it-
self�
• Material has hardened in the mixing
nozzle�
• The mixer motor’s thermal protector
has activated�
• Check that the cartridge is properly seated�
• Install a new nozzle�
• Allow the unit to cool down for approx� 30 minutes,
Observe the maximum permissible operating time
(2 minutes of operation, 5 minute pause)�
Unit automatically re-
duces the Extrusion
speed.
• Unit detects a highly viscous impres-
sion material and automatically re-
duces the feed rate and mixer rotary
speed�
• Contamination (e�g� debris) in the car-
tridge holder�
• Insufficient spindle lubrication.
• The pause time was not observed�
• This only occurs if the material is highly viscose or is
cold� Refer to the manufacturer’s processing instruc-
tions (processing temperature)�
• Clean the inner surfaces of the cartridge holder and
pressure plate�
• Lubricate the spindles (special grease!)�
• At least 5min intermission�
The mixing nozzle
bursts (21, Fig. 1).
• Incorrect mixing nozzle installed�
• Mixing tip/ foil bag not compatible�
• Use the mixing nozzle specified by the manufacturer.
• Contact the manufacturer of the mixing tip / foil bag�
The tubular bag bursts
or is damaged.
• 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�
• Replace the pressure discs (refer to Sec� 6�2)�
• Replace the cartridge (refer to Sec� 5�1)�
Advance stops for no
apparent reason and the
unit performs a short
relief stroke.
• Material has hardened in the cartridge� • Use new mixing nozzle�
en
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