Noby 448 - Fault Indications and Operation; CPU and Common Fault Indications; Alarm Relay and User Keypad Operation; Remote Keypad and Diagnostic Tool

Noby-448 Installation & Programming Instructions (Rev.5) Page 8 of 12
CPU Fault Indication
CPU Fault LED Continuous?
• It is possible one or more display boards have had their address changed. Reset the panel to reconfigure for
the address changes.
• If there have been no address changes then one or more remotes have failed to communicate to the main
board. Check the wiring between all remotes that do not appear to be working.
CPU Fault Flashing?
• It is normal behaviour to see a CPU Fault at power-up . Clear by performing a panel reset.
• Persistent CPU faults may indicate interference from electrical machinery or RF transmitters in the locality.
Common Fault Indication
Common Fault LED Flashing persistently?
• Check that the Fault_Input polarity is correctly programmed (Engineer Keypad Functions), and that the
Fault_Input terminal, if used, is in the required state to hold-off the Common Fault LED. Note that the
Fault_Input Polarity option should be disabled (factory default) if the Fault Input terminal is unused or not
connected to remote equipment.
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].
Noby-448RKP Remote Keypads
Keypad operation is intermittent (where 1 or more Noby-448RKP fitted)?
• Refer to the section ‘Remote Keypad Bus’ (page 3), in particular:
o Check that the DC supply voltage at each Noby-448RKP exceeds 12.0 volts in normal standby
operation, and 10.0 volts during the 3 second Reset phase (all LED’s illuminated).
o Check that no two devices have the same address.
o Check that the total cable length connected to the data pair (A & B) does not exceed 500m.
Random flashing LEDs on the main panel?
• Check for correct wiring throughout the remote data bus i.e. A to A and B to B.
Diagnostic Tool – System Faults & Alarm Disable Switches
It is possible to selectively disable the monitoring and detection functions of the Noby-448. This feature is a
diagnostic tool to assist in identifying the possible cause of spurious faults and alarms.
IMPORTANT: The permanent activation of these Disable Switches may violate EN54 and/or BS5839.
From normal quiescent standby:
Enter an 8 digit access code [3] [3] [5] [1] [4] [2] [6] [3] (the red Function light confirms acceptance).
The current status of the Disable Switches are displayed by the yellow Zone LEDs :
o 1 = Battery Capacity and Low Volts Monitor
o 2 = Head Removal Monitor (all zones)
o 3 = Zone Fire Detection (all zones)
o 4 = Zone Fault Monitor O/C (all zones)
o 5 = Zone Fault Monitor S/C (all zones)
o 6 = Sounder Fault Monitor O/C (all sounders)
o 7 = Sounder Fault Monitor S/C (all sounders)
o 8 = Not Used
Press [1] to scroll down to the required option bit – red LED’s used as a pointer.
Press [6] to toggle the option bit on/off as required – yellow LED’s used to indicate the status.
Press [4] to confirm the selection and return to normal quiescent standby.
- Or -
Press [5] to quit without updating and return to normal quiescent standby.