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Type 8660 control center – Burkert Type 8660 User Manual

Page 32

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Type 8660 Control Center

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heater/hour key will blink. This key is used to quit the error message. Pressing the key will clear the

display and stop the blinking of the light-emitting diode, and further operational activity is possible.

The error message will not be saved, and will appear only when the corresponding unit is contacted.

Possible causes:

- Drive power supply interrupted.

- Potentiometer feedback interrupted.

- Motor of the drive is defect.

- Valve is mechanically stuck.

Possible operational activity:

Quit the error message by pressing the Supplementary heater/hour key. A dot on the display will

show that the message has been quitted.

Consequence:

Depending on the temperature set point w, end positions will be assumed

(w < 50%: closed; w > 50%: open).