Catalogues - lof-11-and-lof-500-nb-220-fibre-optical-overfill-protection-system

Catalogue LOF 1.1 and LOF 500/NB 220 Fibre-optical Overfill Protection System

www.fafnir.de

Page

/ 43

Contact the
Manufacturer

Where to buy
this product ?

/ 43

See other catalogues for Fafnir

Text version of the page

Troubleshooting 1 Fault diagnosis


	Standard	NB 220 QS
green LED is not lit	power failure	power failure
yellow LED is not lit	- max. permissible liquid level reached/ exceeded - system error (corrosion, short circuit, line breakage, etc.)	- max. permissible liquid level reached/ exceeded - system error (corrosion, short circuit, line breakage, etc.)
red LED is lit (option)	system error (interruption/short circuit of signal line between detector and transducer	- max. permissible liquid level reached/ exceeded - system error (corrosion, short circuit, line breakage, etc.)
buzzer sounds (option)		- max. permissible liquid level reached/ exceeded - system error (corrosion, short circuit, line breakage, etc.)

2 Eliminating faults

1. On the NB 220 QS transducer, press the acknowledge button.

The fault was confirmed, and the buzzer is no longer ouputting a signal. The red alarm lamp is still lit because the cause of the fault has not been rectified yet.

2. Notify the specialist company responsible for the overfill protection system. After the cause of the fault has been rectified by the specialist company, the yellow LED is again lit or the red lamp goes out.

Page 25/43

Overfill Protection System LOF 1.1 and LOF 500/NB 220