ADDRESSABLE
FIRE ALARM PANEL
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INSTRUCTION MANUAL: 32 Device,4 Zone Addressable Fire Alarm Panel
Approved Document No: GLT.MAN-129
PAGE 20
Issue : 1.0 Author: NRPJ Date: 11/04/2008
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Check battery fuse FS2.
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Check that battery connections are secure.
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Check that the batteries are not over 5 years old
B a t t e r y L o w
The panel has detected that the battery voltage is lower than the expected minimum (21V
DC). This can occur if:-
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The mains supply had failed, and the batteries had discharged below their final
Voltage. (Batteries discharged below this voltage are not guaranteed to hold their
charge if they are recharged, so the panel turns off the charger, and won`t try to
recharge them)
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The battery charger fuse has blown, and the battery has discharged over time.
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The batteries have come to the end of their working life, and need replacing.
Earth faults
E a r t h F a u l t P o s i t i v e
The Panel has detected a POSITIVE cable shorting to earth. This will probably be the loop
+ve connection shorting to the cable screen. (It could also be bve terminal shorting to
earth)
To track down this fault:-
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Disconnect the cable screens from earth termination strip.
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If fault clears, this verifies the fault.
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Break the earth screen aprox half way along the loop at a detector.
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Connect loop side A screen to earth. If no fault, this half of the cable is clear.
Disconnect earth again.
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Connect loop side B screen to earth. If no fault, this half of the cable is clear
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If there are a large number of devices, try splitting bad section again to try to
pinpoint the source.
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Check for nicks in the cable insulation which might be causing the short
.
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E a r t h F a u l t N e g a t i v e
The Panel has detected a NEGATIVE cable shorting to earth. This will probably be the loop -
ve connection shorting to the cable screen. (It could also be battery -ve terminal shorting to
earth). To track down, use the same method as above.
Loop Cabling faults
L o o p 1 S h o r t S i d e A
The Panel has detected a Short circuit between Loop +ve, and loop –ve, on side A, between
the control panel and the first short circuit loop isolator.
To track down this fault:-
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go to the first device on side A.
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Disconnect the in +ve cable (remember that the cable may have 30V on it, so
don`t touch it to anything.
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If the SHORT fault clears, the fault is in this first section of cable, otherwise
reconnect the cable, move to the next device & repeat.
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The possible causes of a short circuit include:-
o
Actual cable fault where + & - are shorted
o
A short from loop + to earth, and a separate short from loop – to earth at the
same time.
