Form 402951
Page 11
printed circuit board are lit or the signal lamp of the illumina-
ted pushbutton/switch cabinet is lit.
Note: The pump operation can be checked from the outside
by observing whether the stirring paddle is rotating (e.g. by
triggering an additional lubrication), whether the LED on the
Troubleshooting
Fault: The pump motor does not run
Remedy:
Check the voltage supply to the pump. If necessary,
eliminate the cause of the fault.
Check the line leading from the pump plug to the printed
circuit board.
If the voltage is applied, the left-hand LED is lit.
Replace the printed circuit board.
Cause:
Voltage supply interrupted
Voltage supply to the printed-circuit board is interrupted
Printed circuit board defective
Remedy:
Disconnect the main line leading to the monitored
metering device.
Unscrew the proximity switch and check it. For this, insert a
metallic pin into the borehole of the detector. Let it there
over 2 seconds and then remove it. If the pump is not
switched off afterwards, check the cable connections to the
pump. If necessary, replace the proximity switch along with
the connector.
Check the cable connections to the pump. If necessary,
replace the proximity switch with the connector.
Replace the printed circuit board.
Fault: The pump motor runs permanently (30 minutes)- Duration of the monitoring time
Cause:
Proximity switch (initiator) defective.
Cable connection of the proximity switch to the pump
interrupted.
Printed circuit board defective
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