8 | Help with faults BÜCHI Labortechnik AG
30/34 Operation Manual Ultrasonic Package
8 Help with faults
8.1 No liquid delivery
u Check the condition of the tube used in the peristaltic pump.
ð Replace a worn out tube.
u Adjust the peristaltic pump bed. See "Operation Manual Mini Spray Dryer B-290 "
8.2 Liquid emerges unatomized
u Check if the maximum flow rate is within the rated nozzle capacity.
u Check if the feed viscosity and particle size of the slurry are within the specifica-
tions.
u Turn off the peristaltic pump.
u Switch the Ultrasonic Controller on/off for 5 times to get the liquid out of the ultra-
sonic nozzle, or use the damper by squeezing it.
u Adjust the spray cone. See Chapter6.2 "Finding the optimal spray cone", page23
8.3 Error messages
Message Explanation Solution
Alarm The nozzle is not con-
nected
u Connect the nozzle
The nozzle temperature is
more than 100 °C
u Increase the cooling
supply
LED lighting The nozzle temperature is
more than 100 °C
u Increase the cooling
supply
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