|
|
 |
Noby-420 Troubleshooting
Power Supply
The Power LED not illuminated
- Check that the mains supply is connected and switched on.
- Check the mains supply fuse in the terminal block adjacent to the transformer.
- Check the transformer secondary fuse F5 on the main board.
PSU Fault LED continuously illuminated
- The panel is detecting low voltage (< 21V) from the batteries.
- Check the batteries are connected correctly, in series, and observing strict polarity.
- The batteries may be heavily discharged – allow approx. 1hr for a partial recharge.
- The PSU Fault LED will flash when the battery voltage increases to 23V.
- The PSU Fault will clear when the panel is reset.
- The batteries may be faulty – replace as necessary.
PSU Fault LED flashing
- Check the batteries are connected correctly, in series, and observing strict polarity.
- Check Fuse F1 (Aux. 24V ).
Zone Faults
Zone Fault LED continuously illuminated
- Disconnect the relevant zone and replace with the EOL resistor (4K7) at the zone terminal. If the fault can now be cleared then there is a possible wiring error in the zone.
- Check that the correct value EOL resistor is fitted at the end of the zone.
- Check that the wiring and connections at each detector are consistent, and not crossed-over at any point along the cable run.
- Check that all manual call-points in the zone are intact and fitted with an appropriate series resistor, typically 470 ohms.
- If a Zone Fault LED becomes continuously illuminated when a head is removed, then that detector base may be the wrong type. Check that a schottky diode is fitted and correctly connected. Replace the suspect detector base if necessary.
Zone Fault LEDs Flashing
- One or more zones are isolated.
Zone Fault LED intermittently winking
- A detector head is either missing or incorrectly connected.
- Check all detector heads on the corresponding zone are fully seated in their bases.
- Some (older) detectors may be incompatible with head-removal monitoring in which case it is recommended to set the Head Removal Monitor Inhibit (System Options 2, see installation manual).
Fire is detected as Zone Fault
- Check all detector heads on the corresponding zone are fully seated in their bases.
- The panel monitors the zone for a short circuit. Some (older) detectors and call points may be incompatible with short circuit monitoring in which case it is recommended to set the Zone S/C Inhibit (System Options 2, see installation manual).
Sounder Faults
Sounder Fault LED continuously illuminated
- Enter the code [6][2][5][3][1][1] to bring up the sounder fault display, shown by the zone fault LEDs.
- Check the corresponding sounder fuses F2 and/or F3.
- Disconnect the suspect sounder circuit and fit a 4K7 EOL resistor at the sounder terminal. If the sounder fault clears then there is a possible wiring fault in the circuit. Check all connections between sounders.
- Check that the correct value 4K7 EOL resistor is fitted in the circuit.
- Some types of sounders may be incompatible with the Noby-420 sounder circuit monitoring function in which case it is recommended to set the Sounder Circuit Fault Monitor Inhibit (System Options 2).
CPU Fault Indication
CPU Fault Flashing
- It is normal to see a CPU Fault at power-up, and can be cleared by performing a panel reset.
- Persistent CPU faults may indicate interference from electrical machinery or RF transmitters in the immediate locality.
Alarm Relay
Alarm relay not working
- Check that the relay is not isolated.
User Keypad Operation
Reset command [3][6][3][6] [5] is ignored – nothing happens.
- Both the external sounders and internal panel piezo sounder must first be muted before the reset button is acknowledged. This can be performed in one operation by performing a Quick Reset [3][6][3][6] [1][4][5].
|
|
