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BUCHI Rotavapo R-250 User Manual

Page 26

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26

Rotavapor R-250

5 Operation

5.7 Error

Messages

Error messages indicate a defect on the unit and are signalled
ON

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 any button.

E5 :

Message:

EEPROM error.

Cause:

Hardware

defect.

Action:

None.

Acknowledgment:

Press any 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

E27 :

Message:

Communication with control panel broken.

Cause:

Cables or plugs defective.

Action:

Heder and Rotation are switched off, bath lowers.

Acknowledgment:

Switch the unit off.

E28 :

Message:

Replay of heater down.

Cause:

Overtemperature cutoff is active.

Action:

Heder and Rotation are switched off, bath lowers.

Acknowledgment:

Reset the overtemperature cutoff. (see chapter 5.5)

Table 5: Error messages

To let all possible error messages appear, the device must
be shut off and on at least once per 24 h.