BUCHI Multivapo P-12 - Manual (Page 61)

8 Troubleshooting
61 Multivapor™ Operation Manual, Version E
Table 8-1: General malfunctions and their remedy
Malfunction Possible cause Remedy
Distillation stopped despite not being
dried out completely Back evaporation of the distillate
(especially for solvent mixtures) Empty the receiving flask and restart
the distillation or cool the distillate
Malfunction in distillation procedure
which is not exactly defined (e.g.
sudden cooling, heat flow too low,
etc.) Decrease the pressure manually until
the distillation starts again
Table 8-2: Malfunctions with vacuum controller and vacuum pump and their remedy
Malfunction Possible cause Remedy
Frequent switching of valve or pump System leaks See chapter 5.7.1
Vapor sucked into the pump Increase the pressure according to
the procedure described in chapter
6.6
Chosen hysteresis is too small Choose larger hysteresis (if end
vacuum is higher than 700 mbar
switch to automatic hysteresis)
Valve does not switch Valve is dirty or the valve cable is
disconnected Check the cable connection. If this
malfunction occurs again, contact
the BUCHI customer service
Table 8-3: Error messages
Error number Possible cause Remedy
E01 Temperature sensor defective Contact the BUCHI customer service
E02 Triac defective, excess temperature Contact the BUCHI customer service
E70 Program error due to a software or an elec-
tronical error Switch the instrument off and on again. If this
error still occurs, contact the BUCHI customer
service.
8 .2 Customer service
Only authorised service personnel are allowed to perform repair work on the instrument. These
persons have comprehensive technical training and knowledge of possible dangers which might arise
from the instrument.
Contacts for official BUCHI customer service offices are given on the BUCHI website at:
www.buchi.com. If malfunctions occur on your instrument or you have technical questions or applica-
tion problems, please contact one of these offices.
The customer service offers the following:
• Spare part delivery
• Repairs
• Technical advice