Hi

im new to this

i have been asked to look at a fire alarm panel that has zone 3 in fault all the time

its in a building that had its earth rod hit by lightning this afternoon (colleager saw the lightning hit the earth rod), the building is a house with 2rooms converted into an office at home

ne ideas on what to do

its a 4 zone panel,moved zone 3 wiring to zone 4. and works fine

moved the end of line resistor from the spare zone 4 to zone 3, but cant clear the fault on zone 3

all detectors work fine with smoke can

all call points work fine with test key

zone 1: downstairs call points

zone 2: upstairs call points

zone 3: smoke detectors

zone 4: spare

any ideas on whats wrong?

baz

I take it that you have checked all of the panel fuses

all fuses are ok

When you said you moved the end of line unit from zone 4 to zone 3, was that with the circuit cables removed, with the end of line unit connected direct into the panel?

zone 3 had about 4 detectors and 4 call points wired with an eol reistor and was in fault

zone 4 just had an eol resistor

moved the resistor from 4 to 3

moved detecotrs + cp's and eol from 3 to 4

zone 4 works fine now

zone 3 still in fault

im thinking the board is fried

id like to see them fit addressible system hehe but need to see if i can fix it for them first as there is no support contract on the system)

sounds like an insurance claim to me, unless you now a good man with a soldering iron and an osciloscope

It sounds like the lightning has blown the fault monitoring it is a common

problem after a strike.

New panel needed now

Pete

grrr

see if i can sell them my 12 zone hehehehe

and make a profit! hehe

the fault monitoring for all the other zones + the sounders still work fine

baz

Well spotted top marks