Buchi R-210, Operation Manual

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8 Troubleshooting
52
R-210/215 Operation Manual, Version B
Table 8-2: Malfunctions with vacuum controller and vacuum pump and their remedy
Malfunction Possible cause Corrective measure
Frequent switching of valve or pump System is leaky Check all sealing points (tubes and
their connections)
Choosen hysteresis is too small Choose larger hysteresis (if end-
vacuum is higher than 700 mbar,
switch to automatic hysteresis)
Valve does not switch Valve does not shut off Valve is dirty or the valve cable is not
connected
Vacuum is not reached Back evaporation at Rotavapor Empty receiving fl ask
Water pressure of water jet pump is
too low
Open water tap completely
Distillation “died out” Manually decrease the pressure until
the distillation starts again
Distillation stopped, although not
dried out completely
Back evaporation from the receiving
fl ask is too strong (especially for
solvent mixtures)
Empty receiving fl ask and restart
distillation
Malfunction in distillation procedure
which is not exactly defi ned (e.g.
sudden cooling, heat fl ow too low,
etc.)
Decrease the pressure manually until
the distillation starts again
Table 8-3: Error messages heating bath
Error number Displayed at Possible cause Remedy
E01 Heating bath display Bath temperature sensor is defective Contact the Buchi customer service
E02 Heating bath display Excess temperature, bath is not full
enough or empty
Switch off the instrument and let it
cool down. Fill the heating bath and
switch on the instrument again.
E03 Error is read out via the
RS-485 interface and
can be read out at the
vacuum controller
The EEPROM of the bath contains
inconsistent data or is defective
Contact the Buchi customer service
E04 Heating bath display The bath is empty or has been fi lled
with hot liquid
Switch off the instrument and let
it cool down. Fill the bath with
heating medium and switch the
instrument on again.
E70 Heating bath display Program error due to a software or
an electronical error
Switch the instrument off and on
again. When the error still occurs,
contact the Buchi customer
service.