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LPCB APPROVED CFP ALARMSENSE 2/4/8 ZONE FIRE ALARM PANEL
•
The battery fuse (F2) is ruptured.
Symptoms: The panel runs on Mains, but not on batteries.
Suggested actions:
1.
Isolate the Mains supply and disconnect the batteries.
2.
Remove the Main Control PCB and check the battery fuse (F2) on the Power Supply PCB for continuity.
3.
If ruptured check the Power Supply and Main Control PCBs for signs of damage. If none found, replace
fuse with the correct type, ensuring that the fuse clip is not damaged when re-inserting the fuse.
4.
Refit the Main Control PCB and reconnect the batteries.
5.
If the green Supply Present light is lit, reconnect the Mains supply and check that the power supply
fault has cleared. If the Supply Present light is not lit, either the Power Supply PCB or the Main Control
PCB is faulty and should be replaced.
6.
If the battery fuse (F2) is intact, proceed to check the battery voltage/condition (see below).
•
The battery voltage is too low, or in poor condition.
Symptoms: The panel runs on Mains, but may or may not run on batteries.
If the Mains supply has failed and the battery supply has been discharged to the point where the voltage is
too low (i.e less than 21V), the panel will automatically turn off to avoid damaging the batteries by allowing
them to deep discharge. The panel will not restart unless fresh, fully charged batteries are connected, or the
Mains supply is restored.
If the Mains supply has not failed, but the total battery voltage is less than 21V, the PSU will not charge the
batteries to avoid damage to the charging circuit. If the batteries can be charged, the panel will still show a
power supply fault until they have sufficient charge, at which point the power supply fault will automatically
be cleared. Depending on battery size and the depth of discharge, this may take several hours. If the batteries
are in poor condition they must be replaced.
If the batteries (or their leads) are high resistance, then this will also result in a PSU fault. This fault may occur
due to:
- batteries that have been stored for many months
- low quality batteries
- old batteries
- loose/poor connections to the batteries.
If the batteries are in good condition and all the other checks have been performed and no faults found,
the Power Supply PCB is faulty and should be replaced. Note: Batteries that are not connected, connected in
reverse, or with opposite polarities will also cause a power supply fault condition.
•
Supply Present light not lit.
If the Supply Present light is not lit one of the following faults has occurred:
1.
Both the Mains supply and the standby batteries have failed. This could be because the Mains supply has
failed and the batteries have been exhausted.
Suggested action: Restore the Mains supply and the Supply Present light should come back on.
However, if the batteries are discharged this will be recognised as a fault by the panel and indicated as
such. See 'Battery voltage too low' above.
2.
The Power Supply PCB, the Main Control PCB and/or the cable that connects them is faulty.
If the Mains supply is present (indicated by the red Hazardous Voltages Present light being lit on the
Power Supply PCB), check that the connector cable between the Power Supply PCB and the Main Control
PCB is fully inserted at both ends. If so, either the Power Supply PCB and/or the Main Control PCB and/or
the connector cable are faulty and should be replaced.
INSTALLATION & MAINTENANCE MANUAL • Approved Document No. DFU7002020 Rev 4 • Page 20 of 24
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