16
BÜCHI
Rotavapor
R-3000
5.5 Malfunctions
Electrical block diagram
Malfunction
Possible cause
Remedy
Rotavapor does
Power switch off
Switch on Rotavapor
not work
Rotavapor not connected to
Plug in power cord
main power supply
Defective or blown fuse
Call Customer Service
Bath does not
Power switch off
Switch on Rotavapor
heat up
Heating element not plugged in correctly
Plug in heating element correctly (4.4 Heating bath)
Heating controller off
Switch on heater
Overtemperature cut-out has
Allow heater to cool, then reset the overtemperaure
switched off
cut-out (4.4 Heating bath)
Heater defective
Call Customer Service
Flask does
Rotation set to 0
Turn rotation knob clockwise, until rotation starts
not rotate
Motor defective
Call Customer Service
System has a
Ground-glass joints are not greased
Grease ground-glass joints
vacuum leak
Threaded couplings poorly screwed
Check threaded couplings
or defective
Leaky (brittle) hoses
Replace hoses
Seals wrongly installed
Check sealing system
Seal defective
Replace seal
Table 4: Malfunctions
Figure 13: Block diagram
Main switch
Overtemp.
switch
Thermostat
Motor control
Potentiometer
Hallsensor
Motor
Heater
5 Operationg the Rotavapor
Mains