Installation and Commissioning

Troubleshooting Tools2.14 Status LEDs descriptionEach of the units connected to the CAN bus includes 2 or 4 LED indicators which indicatethe condition (health) of the unit and the function of the network communication. TheseLEDs are:All unitsMS - Module statusNS - Network statusSome units:CAN Tx - CAN network transmitCAN Rx - CAN network receiveMS - Module statusThis bicolour (green/red) LED provides device status. It indicates whether or not the devicehas power and is operating properly. The LED is controlled by software. The table belowshows the different states of the MS LED.DescriptionOffNo power applied to the device.GreenDevice is operating in a normal condition.Flashing greenDevice needs commissioning due toconfiguration missing, incomplete orincorrect. The device may be in theStand-by state.Flashing redRecoverable minor fault.RedThe device has an unrecoverable fault.Flashing red/greenThe device is running self test.Remedy / Source of faultCheck power supply.If no light, check other LED modes.Check system parameters.Check messages.Check messages.Device may need replacing.If flashing for more than a few seconds,check hardware.Product Manual 27