17
BÜCHI Mini Spray Dryer B-191 5 Operation
Fault Possible cause Elimination
Output temperature does not Probe not inserted Insert probe in coupling
increase
Decrease in input temperature Heating off Switch heating on
Fuse burned out Change fuse (12.5 AT)
Decrease in output temperature Heating off Switch heating on
Spraying too quickly Reduce feed output of peristalsis
pump
Peristalsis pump lever open Close lever
Increase in output temperature Nozzle clogged Clean nozzle by pressing the cleaning
button or by switching on the nozzle
cleaner
Increase nozzle cleaning interval
Reduce product concentration
Product hose defective Replace product feed hose
Hose not immersed in solution Immerse hose
Change of concentration in Stir product solution (magnetic stirrer)
solution in order to get an even concentration
No product feed Switch on peristalsis pump
Fault code display 000 Input temperature probe defective Contact customer service
Fault code display 001 Output temperature probe Contact customer service
defective
Fault code display 002 Temperature linearity defective Contact customer service
Fault code display 003 Aspirator tachometer defective Contact customer service
Table 3: Fault elimination
Customer service
The addresses of the official Büchi customer service centers
are on the last jacket page of these operating instructions.
Please contact these centers in case of faults, technical que-
ries and use problems.
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