ViscoTec preeflow eco-DUOMIX450, Operation & Maintenance Manual, Page: 25 / 36

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5.2 Troubleshooting
If you have any questions about commissioning, maintenance, repairs or ways to optimise
your processes, our Service employees will be happy to help.
You can reach us at:
support@preeflow.com
We will respond to your service enquiry in German or English.
Fault Possible cause Action
No or too little material
feeding
Motor not connected Connect the motor
Fault with mains supply Check electrical installation
Material hardened/set Dismantle and clean the
dispenser
Mixing capsule blocked Replace mixing capsule
Stator/rotor worn Replace stator/rotor
Stator swollen Check resistance of the stator to
the material and replace stator
Revolution too low Correct revolution
Inadequate supply of material Feed material, check inlet
pressure and correct if required
Material not mixed
sufficiently (e.g.
streaks)
Mixer not switched on Switch on mixer
Speed of the mixer too low Increase speed
Mixing capsule has hardened Replace mixing capsule
Dripping or running on
of material
Suck-back not set correctly Adjust the suck-back
Air bubbles in the material Bleed dispenser / material pipes
Material compressible Degas the material
Pressure too high,
pressure sensor
triggers
Dispenser speed too high Reduce speed
Pump speed too high depending
on the material or mixing
capsule Reduce speed
Material hardened/set Dismantle and clean the
dispenser
Dosing needle blocked / too
narrow Replace dosing needle / use
another size
MAINTENANCE