BUCHI Wet Digester B-440 - Manual (Page 31)

8 Troubleshooting
31 B-440 Operation Manual, Version D
8 Troubleshooting
This section helps to resume operation after a problem has occurred with the instrument which does
not require special technical training. It lists possible occurrences, their probable causes 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 “Remedy”.
8.1 Malfunctions and their remedy
Malfunctions and their remedy
Malfunction Possible cause Remedy
Heating performance low Blind reflector or worn out
heating lamp (see section 8.1.1)
Exchange reflector or call service for
bulb exchange
LED display does not illuminate Onboard fuse or electronic
malfunction
Call service for repair
Heating lamp does not warm up Bulb faulty Call service for exchange
E2, E4, E5, E6,E7, E8, E9 Electronic malfunction Call service for repair
Malfunctions or errors which are not listed in the table are to be corrected by a Buchi trained technical
engineer who has access to the official service manuals. In this case, please refer to your local Buchi
customer service agent.
8.1.1 Heating performance test
Exchange the reflector if a temperature of 530 °C can no longer be achieved at the bottom inside the
crucibles. To check this, a Tempilstick® with a melting point of 530 °C can be used.
NOTE
If the reflector exchange does not increase the system performance sufficiently, call service for a
heating bulb exchange!