35
Rotavapor
R-220 EX
6 Maintenance
6 Maintenance
Please note all rules aimed at keeping the rotary evaporator
in a functional condition. These also include periodic cleaning
and inspection for any damage that might have occurred.
Make certain that the supply of water, compressed air, and
power to the unit has been interrupted before doing any
maintenance work on the unit. Always support the bath
from below, on the underside of the bath whenever doing
any repair work.
6.1 Troubleshooting
Fig. 6.1: Snap flange coupling, closed
Fault
Possible cause
Remedy
Bath cannot be lifted
Pressure too low
Increase pressure (min. 4 bar, max. 8 bar)
Leaks in connections
Contact service department
Bath lift defective
Contact service department
Power supply off
Connect
Heating does not operate
Safety temperature cutout has
Reset safety temperature cutout
been activated
(see Chapter 4.15)
Level sensor is activated
Fill bath with heating medium
PT-1000 defective (no display)
Contact service department
Heater coils defective
Contact service department
Rotation does not function
Pressure too low
Increase pressure (min. 4 bar, max. 8 bar)
Rotary drive defective
Contact service department
Power supply off
Connect
Operator’s panel only
Connection to intrinsically safe
Contact service department
displays dashes
operator’s panel interrupted
Table 6.1: Troubleshooting
6.2 Taking Apart the Snap Flange Coupling
• Close the two segments of the snap flange coupling.
• Turn the snap flange coupling by 180°, until the closure
faces down.
• Have Tool No. 20075 ready at hand.
• Reopen the closure.
• Lift the 1
st
segment of the snap flange coupling to open it.
• Lift the 2
nd
segment of the snap flange coupling to open it.
• With three fingers at the tip, reach under the middle seg-
ment and raise it up.
• Insert Tool No. 20075 in at the side, between the lugs
on the positional lock. Turn lightly until the pin becomes
un latched. Take the snap flange coupling assembly off.
• Clean the snap flange coupling.
