Issue What could be the cause when adding four System Sensor Horn / Strobes to a Wheelock audio visual loop, and the horns are worrking fine but the strobes are not flashing correctly. Solution When installing Audio / Visual Appliances, all devices on the loop must be from the same manufacturer. Mixing System Sensor with Wheelock or Gentex or any combination may cause the Horns or the Strobes to work intermittently or not at all. This is because each manufacturer has their own Sync Pulse Protocol to run their notification devices.
High Voltage (HVLT) Green - Warns of dangerous voltages when lit. Output Active (OUT) Red - Indicates that one of the NACs (1 to 4) is active. NAC Short (SHRT) Yellow - Indicates that there is a short on one of the four NAC outputs. Low Battery (LBAT) Yellow - Indicates that there is a missing or dead battery. AC OK (ACOK) Green - Indicates that the input is good and that the power supply is running from the AC line. Ground Fault (GFLT) Yellow - Indicates that the NAC output wiring has been improperly connected to an external source or ground. Loop Trouble (TBL) Yellow - Indicates that one, or both, NAC Input EOL device(s) has disconnected due to one or more of the following faults: Faulty AC power (after a delay) Low battery fault Ground fault NAC output fault EOL shorted EOL open NAC overcurrent Power supply over voltage condition