43
BÜCHI
Rotavapor
R-220
9 Appendix
9.3
Error Messages
Error messages indicate a defect on the unit and are signalled
on the bath temperature display. They appear with an “E” at
the start, followed by a specific number:
E0 :
Message:
Output from the bath sensor not within the valid range.
Cause:
Sensor defective or a short-circuit has occurred.
Action:
The bath heater is switched OFF. The bath is lowered. Rotation stops.
Acknowledgment:
Switch the unit OFF.
E2 :
Message:
The bath is not reaching the intended maximum height.
Cause:
The motor is defective or blocked. No voltage.
Action:
The lift motor switches OFF. Rotation and heating continue.
Acknowledgment:
Switch the unit OFF.
E3 :
Message:
The rotary drive does not reaching the required speed, or is turning too quickly.
Cause:
Drive defective. Mechanical blocking. No power. Semi-conductor relay defective.
Action:
Bath heater is switched OFF. Bath is lowered.
Acknowledgment:
Switch the unit OFF.
E4 :
Message:
Battery voltage too low. Displayed only when starting the unit.
Cause:
PB battery defective
Action:
None
Acknowledgment:
Press the “Aerate” button.
E5 :
Message:
EEPROM error.
Cause:
Hardware defect.
Action:
None.
Acknowledgment:
Press the “Aerate” button. Work can then be continued, but a Service technician
must be notified of the problem.
E6 :
Message:
Overload of the valve output
Cause:
Valve defective or wrong connections
Action:
None.
Acknowledgment:
Switch the unit OFF
Table 8: Error messages
To let all possible error messages appear, the device must be
shut off and on at least once per 24 h.
