BUCHI Multivapo P-12 - Manual (Page 60)

8 Troubleshooting
60 Multivapor™ Operation Manual, Version E
8 Troubleshooting
The following chapter describes how to resume operation of the instrument in the event of any minor
problem. It will list some possible occurrences, their probable cause and suggests how to remedy the
problem. The troubleshooting table below lists possible malfunctions and errors of the instrument and
describes operator enabled courses of action to correct some of those problems by him or herself.
The appropriate course of action is 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 Remedy
Instrument does not work Main switch off Switch on main switch
Instrument is not connected to mains
supply Check mains connection
Fuse defective Replace the fuse. If this malfunction
occurs again, contact the BUCHI
customer service.
Instrument does not heat Over-temperature protection was
burned Heating plate must be replaced.
Contact the BUCHI customer service.
Fuse defective Replace the fuse. If this malfunction
occurs again, contact the BUCHI
customer service.
Temperature is not adjustable Instrument is set to the preset
temperature mode Follow the instructions in chapter
6.1.1
Rotation is not smooth Uneven and/or unstable surface or 6
position rack on a P-12 instrument Adjust the height of the feet and/
or change location. Do not use a 6
position rack with a P-12 instrument
(see label on the front panel) with
rotations higher than 8. Place the
rack on a P-6 platform.
System leaks See chapter 5.7.1 See chapter 5.7.1
Vacuum is not reached System leaks See chapter 5.7.1
Back evaporation from the distillate Empty the receiving flask or cool the
distillate (e.g. with an ice bath or the
refrigerated receiver)
Vacuum pump is inefficient Check the characteristics and
leaking rate of the vacuum pump
Distillation “died out” Solvent mixtures; initial overheating
of the sample Decrease the pressure until the
distillation starts again or increase
the temperature