BUCHI Scrubber K-415 - Manual (Page 49)

8 Troubleshooting
49 K-415 Operation Manual, Version B
8 Troubleshooting
This chapter helps to resume operation after a minor problem has occurred with the instrument. It lists
possible occurrences, their probable cause and suggests how to remedy the problem.
The troubleshooting table below lists possible malfunctions and errors of the instrument. The operator
is enabled to correct some of those problems or errors by him/herself. For this, appropriate corrective
measures are listed in the column “Corrective measure”.
The elimination of more complicated malfunctions or errors is usually performed by a BUCHI technical
engineer who has access to the official service manuals. In this case, please refer to your local BUCHI
customer service agent.
8 .1 Malfunctions and their remedy
Table 8-1: General malfunction and their remedy
Malfunction Possible cause Corrective measure
K-415 does not work No mains connection?
Fuses defective?
Mains switch defective? Check whether the instrument is connected
to the mains.
Replace the defective fuses.
Contact the BUCHI customer service.
No digestion running while instrument is
controlled by digester? Wait for digestion to start.
Pump does not work Wiring defective?
Pump defective? Contact the BUCHI customer service.
Contact the BUCHI customer service.
Cooling water not running External cooling water source switched
off? Switch external cooling water source on.
Loss of cooling water Untight hose connections? Check hose connections and water control.
Fumes are not exhausted
during digestion (Scrubber
suction capacity too weak) Suction system leaking?
Hose bent or porous?
Adsorption vessel clogged?
Washing solution dirty?
Adsorbents clogged?
Pump dirty?
Silencer unit clogged?
Overpressure valve dirty?
Cock of TKN receiving vessel open?
Wrong adjustment of bypass valve? Tighten the hose and glass connections .
Check the hoses.
Check the adsorption vessel and the
contained activated charcoal.
Exchange the washing solution.
Renew the adsorbents.
Clean the pump.
Replace the silencer unit.
Contact the BUCHI customer service.
Close the cock.
Readjust the bypass valve.
Fumes are exhausted
too fast during digestion
(Scrubber suction capacity
too strong) Suction system clogged?
Adsorbents clogged?
Silencer unit defective?
Wrong adjustment of bypass valve?
Bypass valve defective? Check all stages and the connected diges-
tion unit as well.
Exchange the adsorbents.
Replace the silencer unit.
Readjust the bypass valve.
Contact the BUCHI customer service.
Unsufficient neutralization Washing solution used up?
Swirl discs blocked? Exchange the washing solution.
Clean swirl discs and washing solution.