Heater Decoupled / Def / Dec Message On Screen - Felix printers Tec 4 User Manual

Trouble shooting
Filament attracts a lot of dust, which can potentially all come into the hot-end. In some dusty environments this could
cause a clogged hot-end within a few hours.
Fragment of previously printed material still in extruder.
If you print a material with a high melting temperature and next a material with a low melting temperature, it may be
that a residue of the high melting temperature plastic causes issues inside the extruder. Try extruding some (20 cm)
PLA filament manually at high temperature (220 °C). Make sure to turn back the temperature to normal while slowly
extruding some more material to prevent it to coal inside the extruder.
Clog from the inside of the hot-end.
It could be that a big dust particle or debris buildup inside the hot-end tip causes clogging from the inside.
You could try the dip-and-pull method:
Insert PLA in the hot end. Heat the hot end to about 220°C. Try to extrude some material.Set the hot end temperature
to 80°C. Disable stepper motors (can be done via the Quick settings menu on the printer itself). Wait for the extruder
to reach the set temperature. Pull out the filament in one smooth and steady movement. Most times the clogging
material is attached to the solidified end of the filament.
If that fails, you can try hand-drilling the nozzle opening with a drill that matches your nozzle diameter. The best is to
do this when the extruder is warm, but be careful! We sell some small diameter drills in our web shop.
Hot-end parts are not fixed together properly.
This could cause buildup of filament in some internal cavities/edges.

Heater decoupled / DEF / DEC message on screen

This error presents itself when a part of the heater circuit is not working.
DEF: The thermistor circuit is broken.
If you see this after turning on the printer. It is most likely the thermistor element itself which is defect and
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needs to be replaced.
If you see this while the axis are moving, it is most likely that the wire itself is broken.
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Worst case it could be the control board connections which are not properly fixed.
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DEC: This means the printer is not able to heat up 1 degC within the 20 seconds of heating for the extruders or 60
seconds for the heated bed. Another issue which could trigger it is if the temperature could not be held within 20
degC of the setpoint value.
If you turn on the heater, it should warm up. Please inspect the heater element itself. Only way to do this is by
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measuring the resistance with a multimeter. The value should be 4.7Ohm +/- 1 Ohm.
Then inspect the wiring. If you see it heating, but the temperature stagnates with increasing, while moving one
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of the axis, it is most likely there is a wire breakage.
If above two things are ok, inspect the connections on the control board. Are the terminals and/or connectors
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ok for the respective heater which is giving issues.
In a rare occasion there could be static electricity involved which is influencing the temperature measurement.
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Please check if you see very big fluctuations.
FELIX Tec 4
User Manual
18 December 2017
www.FELIXprinters.com
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