Renfert 6000 0000, Manual

Page: 24 / 356

7 Troubleshooting
Error Cause Corrective action
LEDs do not light (5, 6, 7,
Fig. 1), pressure plates 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 plates will not ad-
vance or retract, the “equip-
ment cover” LED (7, Fig. 1)
is illuminated or is flashing.
• Unit cover not properly closed� • Close the unit cover (8, Fig� 1) and check that the
cartridges are properly seated� If required, seat
cartridges 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 installed.
• The pressure plates have not fully
retracted to their home position�
• Press the retract key (4, Fig� 1) and allow the pres-
sure plates to retract until they stop automatically�
They are now in their home position (refer to Chap-
ter 5�1)�
A loud sound can be heard
when the mixer shaft
threads itself into the mix-
ing nozzle.
• A spring pushes the mixer shaft
forward until it reaches a stop�
• This is perfectly normal and requires no interven-
tion�
• Only install the mixing nozzle subsequently�
The mixing nozzle (21, Fig. 1)
is not turning.
• The mixer shaft has not threaded
itself�
• Material has hardened in the mix-
ing nozzle�
• The mixer motor’s thermal protec-
tor 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)�
The equipment automati-
cally reduces the extrusion
speed.
• Unit detects a highly viscous im-
pression material and automatical-
ly reduces the feed rate and mixer
rotary speed�
• Contamination (e�g� debris) in the
cartridge holder�
• Insufficient spindle lubrication.
• Break time not maintained�
• This only occurs if the material is highly viscose or
is cold� Refer to the manufacturer’s processing in-
structions (processing temperature)�
• Clean the inner surfaces of the cartridge holder
and pressure plate�
• Lubricate the spindles (special grease!)�
• At least 5 min� break�
The mixing nozzle bursts
(21, Fig. 1).
• Incorrect mixing nozzle installed�
• Mixing tip/ foil bag not compatible�
• Use the mixing nozzle specified by the manufac -
turer�
• 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 pressure disc and the car-
tridge�
• The material has partially hard-
ened in the cartridge�
• Replace the pressure discs (refer to Sec� 6�2)�
• Replace the cartridge (refer to Sec� 5�1)�
Advance stops for no ap-
parent reason and the unit
performs a short relief
stroke.
• Material has hardened in the car-
tridge�
• Use new mixing nozzle�
Advance stops for no ap-
parent reason and the pres-
sure discs return to their
home position.
• The controller has detected an
overload�
• Material has hardened in the car-
tridge�
• Insufficient spindle lubrication.
• Impression material is too cold, Refer to the manu-
facturer’s processing instructions�
• Use a new cartridge�
• Lubricate the spindles (special grease!)�
en
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