Help With Faults; Troubleshooting; Troubleshooting General - Buchi S-300 Operation Manual

Büchi Labortechnik AG

10 Help with faults

10.1 Troubleshooting

10.1.1 Troubleshooting general

Operation Manual Mini Spray Dryer S-300
Problem Possible cause
Instrument cannot No electric connection.
be switched on.
Peristaltic pump The rollers are not in contact
does not apply sol- with the feed tubing.
vent.
Feed tube defective.
Product is delivered The pressure of the rollers
after the spray flow on the running surface is too
is switched on al- weak.
though the pump is
switched off.
Nozzle is blocked. Product is too concentrated.
Encrustation on nozzle exit.
Nozzle is defective (e.g. bent
nozzle needle).
Irregular or pulsed Leaks in the spray nozzle.
spraying.
Product drips in No spray flow.
spray cylinder.
Insufficient spray flow.
Help with faults | 10
Action
Establish an electrical
u
connection. See Chapter 5.2
"Establishing electrical
connections", page 24.
Lift the hose base.
u
Adjust the peristaltic pump
u
bed. See Chapter 7.8
"Adjusting the peristaltic pump
bed", page 45.
Replace the feed tube.
u
Adjust the peristaltic pump
u
bed. See Chapter 7.8
"Adjusting the peristaltic pump
bed", page 45.
Use a lower concentration in
u
pump.
Clean the nozzle. See
u
Chapter 9.10 "Cleaning the
nozzle", page 64.
Replace nozzle or defective
u
part.
Check seals in the spray
u
nozzle.
If necessary, replace the seals.
u
Open spray gas valve.
u
Check pressure of the spray
u
gas in the supply tube (5–8
bar).
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