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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 F4 (Battery).
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]. |
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