Buchi K-437, Operation Manual

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8 Troubleshooting
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K-437 Operation Manual, Version A
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 malfunctions and their remedy
Malfunction Possible cause Corrective measure
ERR 1 POWER The digestion process is interrupted
due to a power failure.
The heat is turned off automatically.
Remedy the power failure. After-
wards, delete the error message
from the display by pressing “STOP”.
ERR 2 TEMP The current heating block tempera-
ture exceeds the programmed
temperature by more than 10 °C. The digestion is automatically
stopped and the heat is switched off.
ERR 3 SHUT OFF MAINS Due to a blocked or defective venti-
lator the internal temperature of the
instrument exceeds 60 °C. Switch off the instrument imme-
diately and contact the BUCHI
customer service.